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ltc1591/ltc1597 1 15917fb for more information www.linear.com/ltc1591 typical application description 14-bit and 16-bit parallel low glitch multiplying dacs with 4-quadrant resistors the lt c ? 1591/ltc1597 are pin compatible , parallel input 14 -bit and 16 -bit multiplying current output dacs that operate from a single 5 v supply . inl and dnl are accurate to 1 lsb over the industrial temperature range in both 2 - and 4 -quadrant multiplying modes . true 16- bit 4 -quadrant multiplication is achieved with on-chip 4-quadrant multiplication resistors. these dacs include an internal deglitcher circuit that reduces the glitch impulse to less than 2nv-s (typ). the asynchronous clr pin resets the ltc1591/ltc1597 to zero scale and ltc1591-1/ltc1597-1 to mid-scale. the ltc1591/ltc1597 are available in the 28 -pin ssop package and are specified over the industrial temperature range. for serial interface 16 -bit current output dacs refer to the ltc1595/ltc1596 data sheet. features applications n true 16-bit performance over industrial temperature range n dnl and inl: 1lsb max n on-chip 4-quadrant resistors allow precise 0v to 10v, 0v to ?10v or 10v outputs n pin compatible 14- and 16-bit parts n asynchronous clear pin n ltc1591/ltc1597: reset to zero scale n ltc1591-1/ltc1597-1: reset to mid-scale n glitch impulse < 2nv-s n low power consumption: 10w typ n power-on reset n 28-lead ssop package n process control and industrial automation n direct digital waveform generation n software-controlled gain adjustment n automatic test equipment 16-bit, 4-quadrant multiplying dac with a minimum of external components v cc ltc1597-1 r fb r fb r ofs r ofs 5v ld ld 3 2 9 8 28 23 15pf 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 15pf v out = Cv ref to v ref 1591/97 ta01 agnd dgnd C + lt ? 1468 wr 10 to 21, 24 to 27 wr clr clr v ref C + lt1468 16-bit dac r1 r2 16 data inputs digital input code 0 integral nonlinearity (lsb) 1.00.8 0.6 0.4 0.2 0 C0.2C0.4 C0.6 C0.8 C1.0 4096 8192 1591/97 ta02 12288 16383 v ref = 10v v out = 10v bipolar digital input code 0 integral nonlinearity (lsb) 1.0 0.80.6 0.4 0.2 0 C0.2C0.4 C0.6 C0.8 C1.0 16384 32768 1591/97 ta03 49152 65535 v ref = 10v v out = 10v bipolar ltc1591/ltc1591-1 integral nonlinearityltc1597/ltc1597-1 integral nonlinearity l , lt , lt c , lt m , linear technology and the linear logo are registered trademarks of linear technology corporation. all other trademarks are the property of their respective owners. downloaded from: http:///
ltc1591/ltc1597 2 15917fb for more information www.linear.com/ltc1591 absolute maximum ratings v cc to agnd ................................................ C 0.5 v to 7v v cc to dgnd .............................................. C 0.5v to 7v agnd to dgnd ............................................ v cc + 0.5v dgnd to agnd ............................................ v cc + 0.5v ref, r ofs , r fb , r1, r com to agnd, dgnd ........... 25v digital inputs to dgnd ................ C0.5v to (v cc + 0.5v) i out1 to agnd ............................. C0.5v to( v cc + 0.5v) maximum junction temperature .......................... 125c pin configuration operating temperature range ltc1591c/ltc1591-1c ltc1597c/ltc1597-1c .......................... 0c to 70c ltc1591i/ltc1591-1i ltc1597i/ltc1597-1i ........................ C 40c to 85c storage temperature range ................. C65c to 150c lead temperature (soldering, 10 sec) ................ 300c (note 1) ltc1591 ltc1591 12 3 4 5 6 7 8 9 1011 12 13 14 top view g package 28-lead plastic ssop 2827 26 25 24 23 22 21 20 19 18 17 16 15 clrnc nc d0 d1 v cc dgndd2 d3 d4 d5 d6 d7 d8 ref r com r1 r ofs r fb i out1 agnd ld wr d13d12 d11 d10 d9 t jmax = 125c, ja = 95c/ w 12 3 4 5 6 7 8 9 1011 12 13 14 top view n package 28-lead narrow pdip 2827 26 25 24 23 22 21 20 19 18 17 16 15 clrnc nc d0 d1 v cc dgndd2 d3 d4 d5 d6 d7 d8 ref r com r1 r ofs r fb i out1 agnd ld wr d13d12 d11 d10 d9 t jmax = 125c, ja = 70c/w obsolete package ltc1597 ltc1597 12 3 4 5 6 7 8 9 1011 12 13 14 top view g package 28-lead plastic ssop 2827 26 25 24 23 22 21 20 19 18 17 16 15 clrd0 d1 d2 d3 v cc dgndd4 d5 d6 d7 d8 d9 d10 ref r com r1 r ofs r fb i out1 agnd ld wr d15d14 d13 d12 d11 t jmax = 125c, ja = 95c/ w 12 3 4 5 6 7 8 9 1011 12 13 14 top view n package 28-lead narrow pdip 2827 26 25 24 23 22 21 20 19 18 17 16 15 clrd0 d1 d2 d3 v cc dgndd4 d5 d6 d7 d8 d9 d10 ref r com r1 r ofs r fb i out1 agnd ld wr d15d14 d13 d12 d11 t jmax = 125c, ja = 70c/w obsolete package downloaded from: http:///
ltc1591/ltc1597 3 15917fb for more information www.linear.com/ltc1591 lead free finish tape and reel part marking package description temperature range ltc1591cg#pbf ltc1591cg#trpbf ltc1591cg 28-lead plastic ssop 0c to 70c ltc1591-1cg#pbf ltc1591-1cg#trpbf ltc1591-1cg 28-lead plastic ssop 0c to 70c ltc1591ig#pbf ltc1591ig#trpbf ltc1591ig 28-lead plastic ssop C40c to 85c ltc1591-1ig#pbf ltc1591-1ig#trpbf ltc1591-1ig 28-lead plastic ssop C40c to 85c ltc1597acg#pbf ltc1597acg#trpbf ltc1597acg 28-lead plastic ssop 0c to 70c ltc1597-1acg#pbf ltc1597-1acg#trpbf ltc1597-1acg 28-lead plastic ssop 0c to 70c ltc1597bcg#pbf ltc1597bcg#trpbf ltc1597bcg 28-lead plastic ssop 0c to 70c ltc1597-1bcg#pbf ltc1597-1bcg#trpbf ltc1597-1bcg 28-lead plastic ssop 0c to 70c ltc1597aig#pbf ltc1597aig#trpbf ltc1597aig 28-lead plastic ssop C40c to 85c ltc1597-1aig#pbf ltc1597-1aig#trpbf ltc1597-1aig 28-lead plastic ssop C40c to 85c ltc1597big#pbf ltc1597big#trpbf ltc1597big 28-lead plastic ssop C40c to 85c ltc1597-1big#pbf ltc1597-1big#trpbf ltc1597-1big 28-lead plastic ssop C40c to 85c obsolete package ltc1591cn#pbf ltc1591cn#trpbf ltc1591cn 28-lead narrow pdip 0c to 70c ltc1591-1cn#pbf ltc1591-1cn#trpbf ltc1591-1cn 28-lead narrow pdip 0c to 70c ltc1591in#pbf ltc1591in#trpbf ltc1591in 28-lead narrow pdip C40c to 85c ltc1591-1in#pbf ltc1591-1in#trpbf ltc1591-1in 28-lead narrow pdip C40c to 85c ltc1597acn#pbf ltc1597acn#trpbf ltc1597acn 28-lead narrow pdip 0c to 70c ltc1597-1acn#pbf ltc1597-1acn#trpbf ltc1597-1acn 28-lead narrow pdip 0c to 70c ltc1597bcn#pbf ltc1597bcn#trpbf ltc1597bcn 28-lead narrow pdip 0c to 70c ltc1597-1bcn#pbf ltc1597-1bcn#trpbf ltc1597-1bcn 28-lead narrow pdip 0c to 70c ltc1597ain#pbf ltc1597ain#trpbf ltc1597ain 28-lead narrow pdip C40c to 85c ltc1597-1ain#pbf ltc1597-1ain#trpbf ltc1597-1ain 28-lead narrow pdip C40c to 85c ltc1597bin#pbf ltc1597bin#trpbf ltc1597bin 28-lead narrow pdip C40c to 85c ltc1597-1bin#pbf ltc1597-1bin#trpbf ltc1597-1bin 28-lead narrow pdip C40c to 85c consult ltc marketing for parts specified with wider operating temperature ranges. consult ltc marketing for information on nonstandard lead based finish parts. for more information on lead free part markings, go to: http://www.linear.com/leadfree/ for more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ order information downloaded from: http:///
ltc1591/ltc1597 4 15917fb for more information www.linear.com/ltc1591 electrical characteristics v cc = 5v 10%, v ref = 10v, i out1 = agnd = dgnd = 0v, t a = t min to t max , unless otherwise noted. symbol parameter conditions ltc1591/-1 ltc1597b/-1b ltc1597a/-1a units min typ max min typ max min typ max accuracy resolution l 14 16 16 bits monotonicity l 14 16 16 bits inl integral nonlinearity (note 2) t a = 25c t min to t max l 1 1 2 2 0.25 0.35 1 1 lsb lsb dnl differential nonlinearity t a = 25c t min to t max l 1 1 1 1 0.2 0.2 1 1 lsb lsb ge gain error unipolar mode (note 3) t a = 25c t min to t max l 4 6 16 24 2 3 16 16 lsb lsb bipolar mode (note 3) t a = 25c t min to t max l 4 6 16 24 2 3 16 16 lsb lsb gain temperature coefficient (note 4) ?gain/?temperature l 1 2 1 2 1 2 ppm/c bipolar zero-scale error t a = 25c t min to t max l 3 5 10 16 5 8 lsb lsb i lkg out1 leakage current (note 5) t a = 25c t min to t max l 5 15 5 15 5 15 na na psrr power supply rejection ratio v cc = 5v 10 l 0.1 1 0.4 2 0.4 2 lsb/v v cc = 5v 10%, v ref = 10v, i out1 = agnd = dgnd = 0v, t a = t min to t max , unless otherwise noted. symbol parameter conditions min typ max units reference inputr ref dac input resistance (unipolar) (note 6) l 4.5 6 10 k r1/r2 r1/r2 resistance (bipolar) (notes 6, 13) l 9 12 20 k r ofs , r fb feedback and offset resistances (note 6) l 9 12 20 k ac performance (note 4) output current settling time (notes 7, 8) 1 s mid-scale glitch impulse (note 12) 2 nv-s digital-to-analog glitch impulse (note 9) 1 nv-s multiplying feedthrough error v ref = 10v, 10khz sine wave 1 mv p-p thd total harmonic distortion (note 10) 108 db output noise voltage density (note 11) 10 nv/ hz harmonic distortion (digital waveform generation) unipolar mode (note 14) 2nd harmonic 3rd harmonic sfdr 94 101 94 db db db bipolar mode (note 14) 2nd harmonic 3rd harmonic sfdr 94 101 94 db db db downloaded from: http:///
ltc1591/ltc1597 5 15917fb for more information www.linear.com/ltc1591 electrical characteristics symbol parameter conditions min typ max units analog outputs (note 4)c out output capacitance (note 4) dac register loaded to all 1s: c out1 dac register loaded to all 0s: c out1 l l 115 70 130 80 pf pf digital inputsv ih digital input high voltage l 2.4 v v il digital input low voltage l 0.8 v i in digital input current l 0.001 1 a c in digital input capacitance (note 4) v in = 0v l 8 pf timing characteristics t ds data to wr setup time l 60 ns t dh data to wr hold time l 0 ns t wr wr pulse width l 60 ns t ld ld pulse width l 110 ns t clr clear pulse width l 60 ns t lw d wr to ld delay time l 0 ns power supplyv dd supply voltage l 4.5 5 5.5 v i dd supply current digital inputs = 0v or v cc l 10 a note 1: stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. note 2: 1lsb = 0.006% of full scale = 61ppm of full scale for the ltc1591/ltc1591-1. 1lsb = 0.0015% of full scale = 15.3ppm of full scale for the ltc1597/ltc1597-1. note 3: using internal feedback resistor. note 4: guaranteed by design, not subject to test. note 5: i (out1) with dac register loaded to all 0s. note 6: typical temperature coefficient is 100ppm/c. note 7: i out1 load = 100 in parallel with 13pf. note 8: to 0.006% for a full-scale change, measured from the rising edge of ld for the ltc1591/ltc1591-1. to 0.0015% for a full-scale change, measured from the rising edge of ld for the ltc1597/ltc1597-1. note 9: v ref = 0v. dac register contents changed from all 0s to all 1s or all 1s to all 0s.note 10: v ref = 6v rms at 1khz. dac register loaded with all 1s. note 11: calculation from e n = 4ktrb where: k = boltzmann constant (j/k), r = resistance (), t = temperature (k), b = bandwidth (hz).note 12: mid-scale transition code: 01 1111 1111 1111 to 10 0000 0000 0000 for the ltc1591/ltc1591-1 and 0111 1111 1111 1111 to 1000 0000 0000 0000 for the ltc1597/ltc1597-1. note 13: r1 and r2 are measured between r1 and r com , ref and r com . note 14: measured using the lt1468 op amp in unipolar mode for i/v converter and lt1468 i/v and lt1001 reference inverter in bipolar mode. sample rate = 50khz, signal frequency = 1khz, v ref = 5v, t a = 25c. the denotes specifications that apply over the full operating temperature range. v cc = 5v 10%, v ref = 10v, i out1 = agnd = dgnd = 0v, t a = t min to t max , unless otherwise noted. downloaded from: http:///
ltc1591/ltc1597 6 15917fb for more information www.linear.com/ltc1591 typical performance characteristics bipolar multiplying mode signal-to-(noise + distortion) vs frequency, code = all zeros bipolar multiplying mode signal-to-(noise + distortion) vs frequency, code = all ones mid-scale glitch impulse full-scale settling waveform unipolar multiplying mode signal-to-(noise + distortion) vs frequency time (s) 0 output voltage (mv) C10 0 10 0.6 1.0 1591/97 g01 C20 C30 C40 0.2 0.4 0.8 20 30 40 using an lt1468c feedback = 30pf v ref = 10v 1nv-s typical ld pulse 5v/div 500ns/div using lt1468 op ampc feedback = 20 p f 0v to 10v step gated settling waveform 500v/div 1591/97 g02 frequency (hz) C90 signal/(noise + distortion) (db) C70 C50 C40 10 1k 10k 100k 1591/97 g03 C110 100 C60C80 C100 v cc = 5v using an lt1468 c feedback = 30pf reference = 6v rms 500khz filter 80khz filter 30khz filter frequency (hz) C90 signal/(noise + distortion) (db) C70 C50 C40 10 1k 10k 100k 1591/97 g04 C110 100 C60C80 C100 v cc = 5v using two lt1468s c feedback = 15pf reference = 6v rms 500khz filter 80khz filter 30khz filter frequency (hz) C90 signal/(noise + distortion) (db) C70 C50 C40 10 1k 10k 100k 1591/97 g05 C110 100 C60C80 C100 v cc = 5v using two lt1468s c feedback = 15pf reference = 6v rms 500khz filter 80khz filter 30khz filter supply current vs input voltage logic threshold vs supply voltage intput voltage (v) 0 supply current (ma) 3 4 5 4 1591/97 g06 2 1 0 1 2 3 5 v cc = 5v all digital inputstied together supply voltage (v) 0 0 logic threshold (v) 0.5 1.0 1.5 2.0 3.0 1 2 3 4 1591/97 g07 5 7 6 2.5 (ltc1591/ltc1597) downloaded from: http:///
ltc1591/ltc1597 7 15917fb for more information www.linear.com/ltc1591 typical performance characteristics integral nonlinearity vs reference voltage in bipolar mode differential nonlinearity vs reference voltage in unipolar mode differential nonlinearity vs reference voltage in bipolar mode integral nonlinearity vs supply voltage in unipolar mode integral nonlinearity vs supply voltage in bipolar mode differential nonlinearity vs supply voltage in unipolar mode integral nonlinearity (inl) differential nonlinearity (dnl) integral nonlinearity vs reference voltage in unipolar mode digital input code 0 C1.0 integral nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 4096 8192 1591 g01 C0.6 0.6 0.8 0.2 12280 16383 digital input code 0 C1.0 differential nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 4096 8192 1591 g02 C0.6 0.6 0.8 0.2 12280 16383 reference voltage (v) C10 integral nonlinearity (lsb) 0.2 0.6 1.0 6 1591 g03 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 reference voltage (v) C10 integral nonlinearity (lsb) 0.2 0.6 1.0 6 1591 g04 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 reference voltage (v) C10 differential nonlinearity (lsb) 0.2 0.6 1.0 6 1591 g05 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 reference voltage (v) C10 differential nonlinearity (lsb) 0.2 0.6 1.0 6 1591 g06 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 supply voltage (v) 0 C1.0 integral nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.00.4 2 4 5 1591 g07 C0.6 0.6 0.80.2 1 3 6 7 v ref = 10v v ref = 2.5v v ref = 10v v ref = 2.5v supply voltage (v) 0 C1.0 integral nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.00.4 2 4 5 1591 g08 C0.6 0.6 0.80.2 1 3 6 7 v ref = 10v v ref = 2.5v v ref = 10v v ref = 2.5v supply voltage (v) 0 C1.0 differential nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.00.4 2 4 5 1591 g09 C0.6 0.6 0.80.2 1 3 6 7 v ref = 10v v ref = 2.5v v ref = 10v v ref = 2.5v (ltc1591) downloaded from: http:///
ltc1591/ltc1597 8 15917fb for more information www.linear.com/ltc1591 typical performance characteristics bipolar multiplying mode frequency response vs digital code bipolar multiplying mode frequency response vs digital code differential nonlinearity vs supply voltage in bipolar mode unipolar multiplying mode frequency response vs digital code supply voltage (v) 0 C1.0 differential nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 2 4 5 1591 g10 C0.6 0.6 0.80.2 1 3 6 7 v ref = 10v v ref = 10v v ref = 2.5v v ref = 2.5v frequency (hz) C100 attenuation (db) C80 C40 0 100 10k 100k 10m 1591g11 C120 1k 1m C20C60 all bits off C + 30pf 3 2 1 4 6 7 22 5 lt1468 ltc1591 v out v ref d9 ond8 on d6 on d5 on d4 on d3 on d2 on d1 on d13 ond12 on d11 on d10 on all bits on d7 ond0 on frequency (hz) C100 attenuation (db) C80 C40 0 10 1k 10k 10m 1m *dac zero voltage output limited by bipolar zero error to C84db typical (C70db max) 100 100k C20C60 d13 and d12 ond13 and d11 on d13 and d10 on d13 and d9 on d13 and d8 on d13 and d7 on d13 and d6 on d13 and d5 on d13 and d4 on d13 and d3 on d13 and d2 on d13 and d1 on d13 and d0 on all bits on 1591 g12 15pf 12pf C + C + 12pf v ref v out 1 2 3 4 6 7 22 5 lt1468 lt1468 ltc1591 codes from midscale to full scale d13 on * frequency (hz) C100 attenuation (db) C80 C40 0 10 1k 10k 10m 1m 1591g13 100 100k C20C60 *dac zero voltage output limited by bipolar zero error to C84db typical (C70db max) 15pf 12pf C + C + 12pf v ref v out 1 2 3 4 6 7 22 5 lt1468 lt1468 ltc1591 codes from midscale to zero scale d12 ond12 and d11 on d12 to d10 on d12 to d9 on d12 to d8 on d12 to d7 on d12 to d6 on d12 to d5 on d12 to d4 on d12 to d3 on d12 to d2 on d12 to d1 on d12 to d0 on all bits off d13 on * (ltc1591) downloaded from: http:///
ltc1591/ltc1597 9 15917fb for more information www.linear.com/ltc1591 typical performance characteristics integral nonlinearity vs reference voltage in bipolar mode differential nonlinearity vs reference voltage in unipolar mode differential nonlinearity vs reference voltage in bipolar mode integral nonlinearity vs supply voltage in unipolar mode integral nonlinearity vs supply voltage in bipolar mode differential nonlinearity vs supply voltage in unipolar mode integral nonlinearity (inl) differential nonlinearity (dnl) integral nonlinearity vs reference voltage in unipolar mode digital input code 0 C1.0 integral nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 16384 32768 1597 g01 C0.6 0.6 0.8 0.2 49152 65535 digital input code 0 C1.0 differential nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 16384 32768 1597 g02 C0.6 0.6 0.8 0.2 49152 65535 reference voltage (v) C10 integral nonlinearity (lsb) 0.2 0.6 1.0 6 1597 g03 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 reference voltage (v) C10 integral nonlinearity (lsb) 0.2 0.6 1.0 6 1597 g04 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 reference voltage (v) C10 differential nonlinearity (lsb) 0.2 0.6 1.0 6 1597 g05 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 reference voltage (v) C10 differential nonlinearity (lsb) 0.2 0.6 1.0 6 1597 g06 C0.2C0.6 0 0.4 0.8 C0.4C0.8 C1.0 C6 C2 2 C8 8 C4 0 4 10 supply voltage (v) C1.0 integral nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.00.4 2 4 5 1597 g07 C0.6 0.6 0.80.2 3 6 7 v ref = 10v v ref = 10v v ref = 2.5v v ref = 2.5v supply voltage (v) integral nonlinearity (lsb) C2.0 C1.0 C0.5 0 2.01.0 2 4 5 1597 g08 C1.5 1.50.5 3 6 7 v ref = 10v v ref = 10v v ref = 2.5v v ref = 2.5v supply voltage (v) C1.0 differential nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 2 4 5 1597 g09 C0.6 0.6 0.80.2 3 6 7 v ref = 10v v ref = 2.5v v ref = 10v v ref = 2.5v (ltc1597) downloaded from: http:///
ltc1591/ltc1597 10 15917fb for more information www.linear.com/ltc1591 typical performance characteristics bipolar multiplying mode frequency response vs digital code bipolar multiplying mode frequency response vs digital code differential nonlinearity vs supply voltage in bipolar mode unipolar multiplying mode frequency response vs digital code supply voltage (v) C1.0 differential nonlinearity (lsb) C0.8 C0.4 C0.2 0 1.0 0.4 2 4 5 1597 g10 C0.6 0.6 0.80.2 3 6 7 v ref = 10v v ref = 10v v ref = 2.5v v ref = 2.5v frequency (hz) C100 attenuation (db) C80 C40 0 100 10k 100k 10m 1591g11 C120 1k 1m C20C60 all bits off C + 30pf 3 2 1 4 6 7 22 5 lt1468 ltc1591 v out v ref d9 ond8 on d6 on d5 on d4 on d3 on d2 on d1 on d13 ond12 on d11 on d10 on all bits on d7 ond0 on frequency (hz) C100 attenuation (db) C80 C40 0 10 *dac zero voltage output limited by bipolar zero error to C96db typical (C78db max, a grade) 1k 10k 10m 1m 1597 g12 100 100k C20C60 d15 and d14 ond15 and d13 on d15 and d12 on d15 and d11 on d15 and d10 on d15 and d9 on d15 and d8 on d15 and d7 on d15 and d6 on d15 and d5 on d15 and d4 on d15 and d3 on d15 and d2 on all bits on 15pf 12pf C + C + 12pf v ref v out 1 2 3 4 6 7 22 5 lt1468 lt1468 ltc1597 d15 on * d15 and d0 on d15 and d1 on codes from midscale to full scale frequency (hz) C100 attenuation (db) C80 C40 0 10 1k 10k 10m 1m 1597 g13 100 100k C20C60 d14 ond14 and d13 on d14 to d12 on d14 to d11 on d14 to d10 on d14 to d9 on d14 to d8 on d14 to d7 on d14 to d6 on d14 to d5 on d14 to d4 on d14 to d3 on d14 to d2 on d14 to d1 on all bits off *dac zero voltage output limited by bipolar zero error to C96db typical (C78db max, a grade) 15pf 12pf C + C + 12pf v ref v out 1 2 3 4 6 7 22 5 lt1468 lt1468 ltc1597 d14 to d0 on d15 on * codes from midscale to zero scale (ltc1597) downloaded from: http:///
ltc1591/ltc1597 11 15917fb for more information www.linear.com/ltc1591 pin functions ref (pin 1): reference input and 4 -quadrant resistor r 2. typically 10v, accepts up to 25v. in 2 -quadrant mode this is the reference input . in 4 -quadrant mode , this pin is driven by external inverting reference amplifier.r com (pin 2): center tap point of the two 4-quadrant resistors r 1 and r 2. normally tied to the inverting input of an external amplifier in 4 -quadrant operation , otherwise shorted to the ref pin. see figures 1a and 2a. r1 (pin 3): 4 -quadrant resistor r 1. in 2 -quadrant opera - tion short to the ref pin . in 4 -quadrant mode tie to r ofs (pin 4).r ofs (pin 4): bipolar offset resistor . typically swings 10v, accepts up to 25v. in 2 -quadrant operation tie to r fb . in 4-quadrant operation tie to r1. r fb (pin 5): feedback resistor . normally tied to the output of the current to voltage converter op amp . swings to v ref . v ref is typically 10v. i out1 (pin 6): dac current output . tie to the inverting input of the current to voltage converter op amp.agnd (pin 7): analog ground. tie to ground. ld (pin 8): dac digital input load control input . when ld is taken to a logic high , data is loaded from the input register into the dac register, updating the dac output.wr (pin 9): dac digital write control input . when wr is taken to a logic low , data is loaded from the digital input pins into the 14-bit wide input register.db13 to d2 (pins 10 to 21): digital input data bits. dgnd (pin 22): digital ground. tie to ground. v cc (pin 23): the positive supply input . 4.5vv cc 5.5v. requires a bypass capacitor to ground.db1, db0 (pins 24, 25): digital input data bits. nc (pins 26, 27): no connect. clr (pin 28): digital clear control function for the dac . when clr is taken to a logic low , it sets the dac output and all internal registers to zero code for the ltc1591 and mid-scale code for the ltc1591-1. ltc1591 downloaded from: http:///
ltc1591/ltc1597 12 15917fb for more information www.linear.com/ltc1591 ref (pin 1): reference input and 4 -quadrant resistor r 2. typically 10v, accepts up to 25v. in 2 -quadrant mode this is the reference input . in 4 -quadrant mode , this pin is driven by external inverting reference amplifier.r com (pin 2): center tap point of the two 4-quadrant resistors r 1 and r 2. normally tied to the inverting input of an external amplifier in 4 -quadrant operation , otherwise shorted to the ref pin. see figures 1b and 2b. r1 (pin 3): 4 -quadrant resistor r 1. in 2 -quadrant opera - tion short to the ref pin . in 4 -quadrant mode tie to r ofs (pin 4).r ofs (pin 4): bipolar offset resistor . typically swings 10v, accepts up to 25v. in 2 -quadrant operation tie to r fb . in 4-quadrant operation tie to r1. r fb (pin 5): feedback resistor . normally tied to the output of the current to voltage converter op amp . swings to v ref . v ref is typically 10v. i out1 (pin 6): dac current output . tie to the inverting input of the current to voltage converter op amp.agnd (pin 7): analog ground. tie to ground. ld (pin 8): dac digital input load control input . when ld is taken to a logic high , data is loaded from the input register into the dac register, updating the dac output.wr (pin 9): dac digital write control input . when wr is taken to a logic low , data is loaded from the digital input pins into the 16-bit wide input register.db15 to d4 (pins 10 to 21): digital input data bits. dgnd (pin 22): digital ground. tie to ground. v cc (pin 23): the positive supply input . 4.5vv cc 5.5v. requires a bypass capacitor to ground.db3 to db0 (pins 24 to 27): digital input data bits. clr (pin 28): digital clear control function for the dac . when clr is taken to a logic low , it sets the dac output and all internal registers to zero code for the ltc1597 and mid-scale code for the ltc1597-1. ltc1597 pin functions downloaded from: http:///
ltc1591/ltc1597 13 15917fb for more information www.linear.com/ltc1591 truth table block diagrams control inputs clr wr ld register operation 0 x x reset input and dac register to all 0s for ltc1591/ltc1597 and mid-scale for ltc1591-1/ltc1597-1 (asynchronous operation) 1 0 0 load input register with all 14/16 data bits 1 1 1 load dac register with the contents of the input register 1 0 1 input and dac register are transparent 1 clk = ld and wr tied together. the 14/16 data bits are loaded into the input register on the falling edge of the clk and then loaded into the dac register on the rising edge of the clk 1 1 0 no register operation table 1 96k 12k 12k 96k 48k 96k 48k 96k decoder d13 (msb) d11 d12 d13 d10 d9 d0 (lsb) load v cc ref r fb i out1 agnd clr 28 dgnd 22 1591 bd dac register 48k 48k 48k 48k 48k 48k 48k 12k 8 23 r1 3 r com 2 1 ld 9 10 d12 11 d2 21 d1 24 d0 25 nc 27 nc 26 wr 7 6 5 r ofs 4 ? ??? 12k wr input register ? ? ? ? rst rst ltc1591 downloaded from: http:///
ltc1591/ltc1597 14 15917fb for more information www.linear.com/ltc1591 timing diagram 96k 12k 12k 96k 48k 96k 48k 96k decoder d15 (msb) d13 d14 d15 d12 d11 d0 (lsb) load v cc ref r fb i out1 agnd clr 28 dgnd 22 1597 bd dac register 48k 48k 48k 48k 48k 48k 48k 12k 8 23 r1 3 r com 2 1 ld 9 10 d14 11 d4 21 d3 24 d2 25 d0 27 d1 26 wr 7 6 5 r ofs 4 ? ? ?? 12k wr input register ? ? ? ? rst rst ltc1597 block diagrams data ld clr 1591/97td t wr t ds t ld t dh t lwd wr t clr downloaded from: http:///
ltc1591/ltc1597 15 15917fb for more information www.linear.com/ltc1591 description the ltc1591/ltc1597 are 14-/16 -bit multiplying , current output dacs with a full parallel 14-/16 -bit digital interface . the devices operate from a single 5 v supply and provide both unipolar 0 v to C 10 v or 0 v to 10 v and bipolar 10v output ranges from a 10 v or C10 v reference input . they have three additional precision resistors on chip for bipolar operation. refer to the block diagrams regarding the fol - lowing description. the 14 -/16 -bit dacs consist of a precision r- 2 r ladder for the 11/13lsbs. the 3 msbs are decoded into seven segments of resistor value r . each of these segments and the r- 2 r ladder carries an equally weighted current of one eighth of full scale . the feedback resistor r fb and 4 -quadrant resistor r ofs have a value of r /4. 4-quadrant resistors r 1 and r 2 have a magnitude of r /4. r 1 and r 2 together with an external op amp ( see figure 2) inverts the reference input voltage and applies it to the 14-/16- bit dac input ref , in 4 -quadrant operation . the ref pin presents a constant input impedance of r /8 in unipolar mode and r /12 in bipolar mode . the output impedance of the current output pin i out1 varies with dac input code . the i out1 capacitance due to the nmos current steering switches also varies with input code from 70 pf to 115pf. an added feature of these devices , especially for waveform generation, is a proprietary deglitcher that reduces glitch energy to below 2 nv-s over the dac output voltage range . applications information figure 1a. unipolar operation (2-quadrant multiplication) v out = 0v to ? v ref digital section the ltc1591/ltc1597 are 14-/16 -bit wide full parallel data bus inputs . the devices are double-buffered with two 14-/16 -bit registers . the double-buffered feature permits the update of several dacs simultaneously . the input register is loaded directly from a 16 -bit microprocessor bus when the wr pin is brought to a logic low level . the second register ( dac register ) is updated with the data from the input register when the ld pin is brought to a logic high level . updating the dac register updates the dac output with the new data . to make both registers transparent for flowthrough mode , tie wr low and ld high. however , this defeats the deglitcher operation and output glitch impulse may increase . the deglitcher is activated on the rising edge of the ld pin . the versatility of the interface also allows the use of the input and dac registers in a master slave or edge-triggered configuration . this mode of operation occurs when wr and ld are tied together. the asynchronous clear pin resets the ltc1591/ ltc1597 to zero scale and the ltc1591-1/ltc1597-1 to mid-scale. clr resets both the input and dac registers . these devices also have a power-on reset . table 1 shows the truth table for the ltc1591/lt1597.unipolar mode (2-quadrant multiplying, v out = 0v to ? v ref ) the ltc1591/ltc1597 can be used with a single op amp to provide 2 -quadrant multiplying operation as shown in figure 1. with a fixed C 10 v reference , the circuits shown give a precision unipolar 0v to 10v output swing. v cc ltc1591 r fb r fb r ofs r ofs 5v ld ld 3 2 9 8 28 27 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 33pf v out = 0v to Cv ref 1591/97 f01a agnd dgnd wr 10 to 21, 24, 25 wr clr nc clr v ref C + lt1001 14-bit dac r1 r2 14 data inputs unipolar binary code table digital input binary number in dac register Cv ref (16,383/16,384) Cv ref (8,192/16,384) = Cv ref / 2 Cv ref (1/16,384) 0v lsb 1111 1111 11 0000 0000 00 0000 0000 01 0000 0000 00 analog output v out msb 11111000 0000 0000 26 nc downloaded from: http:///
ltc1591/ltc1597 16 15917fb for more information www.linear.com/ltc1591 bipolar mode (4-quadrant multiplying, v out = ? v ref to v ref ) the ltc1591/ltc1597 contain on chip all the 4-quadrant resistors necessary for bipolar operation . 4 -quadrant multiplying operation can be achieved with a minimum of external components , a capacitor and a dual op amp , as shown in figure 2. with a fixed 10 v reference , the circuit shown gives a precision bipolar C 10 v to 10 v output swing . op amp selection because of the extremely high accuracy of the 14-/16-bit ltc1591/ltc1597, thought should be given to op amp selection in order to achieve the exceptional performance of which the part is capable . fortunately , the sensitivity of inl and dnl to op amp offset has been greatly reduced compared to previous generations of multiplying dacs. op amp offset will contribute mostly to output offset and gain and will have minimal effect on inl and dnl . for the ltc1597, a 500 v op amp offset will cause about 0.55 lsb inl degradation and 0.15 lsb dnl degradation with a 10 v full-scale range . the main effects of op amp offset will be a degradation of zero-scale error equal to the op amp offset , and a degradation of full-scale error applications information equal to twice the op amp offset . for the ltc1597, the same 500 v op amp offset (2 mv offset for ltc1591) will cause a 3.3 lsb zero-scale error and a 6.5 lsb full-scale error with a 10v full-scale range.op amp input bias current (i bias ) contributes only a zero-scale error equal to i bias (r fb/ r ofs ) = i bias (6k). for a thorough discussion of 16 -bit dac settling time and op amp selection , refer to application note 74, component and measurement advances ensure 16 -bit dac settling time. reference input and grounding for optimum performance the reference input of the ltc1597 should be driven by a source impedance of less than 1k. however , these dacs have been designed to minimize source impedance effects . an 8k source imped - ance degrades both inl and dnl by 0.2lsb.as with any high resolution converter , clean grounding is important. a low impedance analog ground plane and star grounding should be used . agnd must be tied to the star ground with as low a resistance as possible. v cc ltc1597 r fb r fb r ofs r ofs 5v ld ld 3 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 33pf v out = 0v to Cv ref 1591/97 f01b agnd dgnd wr 10 to 21, 24 to 27 wr clr clr v ref C + lt1001 16-bit dac r1 r2 16 data inputs unipolar binary code table digital input binary number in dac register Cv ref (65,535/65,536) Cv ref (32,768/65,536) = Cv ref /2 Cv ref (1/65,536) 0v lsb 1111 1111 1111 0000 0000 0000 0000 0000 0001 0000 0000 0000 analog output v out msb 11111000 0000 0000 figure 1b. unipolar operation (2-quadrant multiplication) v out = 0v to ? v ref downloaded from: http:///
ltc1591/ltc1597 17 15917fb for more information www.linear.com/ltc1591 applications information v cc ltc1591-1 r fb r fb r ofs r ofs 5v ld ld 3 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 33pf v out = Cv ref to v ref 1591/97 f02a agnd dgnd C + 1/2 lt1112 wr 10 to 21, 24, 25 wr clr clr v ref C + 1/2 lt1112 14-bit dac r1 r2 14 data inputs bipolar offset binary code table digital input binary number in dac register v ref (8,191/8,192) v ref (1/8,192) 0vCv ref (1/8,192) Cv ref lsb 1111 1111 11 0000 0000 01 0000 0000 00 1111 1111 11 0000 0000 00 analog output v out msb 11111000 1000 0111 0000 27 nc 26 nc figure 2a. bipolar operation (4-quadrant multiplication) v out = ? v ref to v ref v cc ltc1597-1 r fb r fb r ofs r ofs 5v ld ld 3 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 33pf v out = Cv ref to v ref 1591/97 f02b agnd dgnd C + 1/2 lt1112 wr 10 to 21, 24 to 27 wr clr clr v ref C + 1/2 lt1112 16-bit dac r1 r2 16 data inputs bipolar offset binary code table digital input binary number in dac register v ref (32,767/32,768) v ref (1/32,768) 0vCv ref (1/32,768) Cv ref lsb 1111 1111 1111 0000 0000 0001 0000 0000 0000 1111 1111 1111 0000 0000 0000 analog output v out msb 11111000 1000 0111 0000 figure 2b. bipolar operation (4-quadrant multiplication) v out = ? v ref to v ref downloaded from: http:///
ltc1591/ltc1597 18 15917fb for more information www.linear.com/ltc1591 typical applications noninverting unipolar operation (2-quadrant multiplication) v out = 0v to v ref v cc ltc1597 r fb r fb r ofs r ofs 5v ld ld 3 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 33pf v out = 0v to v ref 1591/97 f06 agnd dgnd C + 1/2 lt1112 wr 10 to 21, 24 to 27 wr clr clr v ref C + 1/2 lt1112 16-bit dac r1 r2 16 data inputs downloaded from: http:///
ltc1591/ltc1597 19 15917fb for more information www.linear.com/ltc1591 typical applications 16-bit v out dac programmable unipolar/bipolar configuration v cc ltc1597 r fb r fb r ofs r ofs 5v ld ld 3 3 ltc203ac 2 1 6 4 2 unipolar/ bipolar 15v 14 15 16 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 15pf v out 1591/97 f04 agnd dgnd C + lt1001 C + lt1468 wr 10 to 21, 24 to 27 wr clr clr C + lt1468 16-bit dac r1 r2 16 data inputs lt1236a-10 downloaded from: http:///
ltc1591/ltc1597 20 15917fb for more information www.linear.com/ltc1591 typical applications digital waveform generator v cc ltc1597 r fb r fb r ofs r ofs 5v ld 3 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 15pf 1591/97 f05 agnd dgnd C + wr 10 to 21, 24 to 27 clr C + lt1468 16-bit dac r1 r2 16 data inputs lt1001 6 4 2 15v lt1236a-10 lowpass filter (m)(f c ) 2 n f o = sin rom lookup table parallel delta phase register m phase register phase truncation 16 bits phase accumulator frequency control n = 24 to 32 bits clock n n n n n serial or byte load register f o downloaded from: http:///
ltc1591/ltc1597 21 15917fb for more information www.linear.com/ltc1591 package description dimensions in inches (millimeters) unless otherwise noted. please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. g package 28-lead plastic ssop (0.209) (ltc dwg # 05-08-1640) g28 ssop 0694 0.005 C 0.009 (0.13 C 0.22) 0 C 8 0.022 C 0.037 (0.55 C 0.95) 0.205 C 0.212** (5.20 C 5.38) 0.301 C 0.311 (7.65 C 7.90) 1 2 3 4 5 6 7 8 9 10 11 12 1413 0.397 C 0.407* (10.07 C 10.33) 2526 22 21 20 19 18 17 16 15 23 24 2728 0.068 C 0.078 (1.73 C 1.99) 0.002 C 0.008 (0.05 C 0.21) 0.0256 (0.65) bsc 0.010 C 0.015 (0.25 C 0.38) dimensions do not include mold flash. mold flash shall not exceed 0.006" (0.152mm) per side dimensions do not include interlead flash. interlead flash shall not exceed 0.010" (0.254mm) per side * ** downloaded from: http:///
ltc1591/ltc1597 22 15917fb for more information www.linear.com/ltc1591 obsolete package n package 28-lead plastic pdip (narrow 0.300 inch) (ltc dwg # 05-08-1510 rev i) package description dimensions in inches (millimeters) unless otherwise noted. please refer to http:// www .linear.com/designtools/packaging/ for the most recent package drawings. n28 rev i 0711 1.400* (35.560) max 3 4 5 6 7 8 9 10 11 12 21 13 14 15 16 18 17 19 20 22 23 24 25 26 2 27 1 28 .020 (0.508) min .120 (3.048) min .130 .005 (3.302 0.127) .065 (1.651) typ .045 C .065 (1.143 C 1.651) .018 .003 (0.457 0.076) .005 (0.127) min .008 C .015 (0.203 C 0.381) .300 C .325 (7.620 C 8.255) .325 +.035C.015 +0.889C0.381 8.255 ( ) note:1. dimensions are inches millimeters *these dimensions do not include mold flash or protrusions. mold flash or protrusions shall not exceed .010 inch (0.254mm) .100 (2.54) bsc .240 C .295* (6.096 C 7.493) downloaded from: http:///
ltc1591/ltc1597 23 15917fb for more information www.linear.com/ltc1591 information furnished by linear technology corporation is believed to be accurate and reliable . however, no responsibility is assumed for its use . linear technology corporation makes no representa - tion that the interconnection of its circuits as described herein will not infringe on existing patent rights . revision history rev date description page number b 07/15 obsoleted 28-lead pdip package 2, 3, 22 (revision history begins at rev b) downloaded from: http:///
ltc1591/ltc1597 24 15917fb for more information www.linear.com/ltc1591 linear technology corporation 1630 mccarthy blvd., milpitas, ca 95035-7417 (408) 432-1900 fax : (408) 434-0507 www.linear.com ? linear technology corporation 1998 lt 0715 rev b ? printed in usa related parts typical application part number description comments op amps lt ? 1001 precision operational amplifier low offset, low drift lt1112 dual low power, precision picoamp input op amp low offset, low drift lt1468 90mhz, 22v/s, 16-bit accurate op amp precise, 1s settling to 0.0015% dacs ltc1595/ltc1596 serial 16-bit current output dacs low glitch, 1lsb maximum inl, dnl ltc1650 serial 16-bit voltage output dac low noise and glitch rail-to-rail v out ltc1658 serial 14-bit voltage output dac low power, 8-lead msop rail-to-rail v out adcs ltc1418 14-bit, 200ksps 5v sampling adc 16mw dissipation, serial and parallel outputs ltc1604 16-bit, 333ksps sampling adc 2.5v input, sinad = 90db, thd = 100db ltc1605 single 5v, 16-bit 100ksps adc low power, 10v inputs references lt1236 precision reference ultralow drift, 5ppm/c, high accuracy 0.05% 17-bit sign magnitude dac with bipolar zero error of 140v (0.92lsb at 17 bits) at 25c v cc 15pf ltc1597 r fb r fb r ofs r ofs 5v ld ld 3 3 ltc203ac 2 1 6 4 2 15v 14 15 16 2 9 8 28 23 7 22 r1 r com 1 ref 4 5 0.1f 6 i out1 20pf v out 1591/97 f03 agnd dgnd C + lt1468 wr 10 to 21, 24 to 27 sign bit wr clr clr C + lt1468 16-bit dac r1 r2 16 data inputs lt1236a-10 downloaded from: http:///

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