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1 of 8 030804 features single 100-position ta per potentiometer nonvolatile (nv) on-demand wiper storage operates from 3v or 5v supplies up/down, increment-controlled interface available in 8-pin (300mil) dip, 8-pin (150mil) so, 8-pin (118mil) sop, and flip- chip packages operating temperature: ? industrial: -40oc to +85oc standard resistance values: ? ds1804-010 10k ? ds1804-050 50k ? ds1804-100 100k pin assignment pin desciption h - high-terminal of potentiometer l - low-terminal of potentiometer w - wiper of potentiometer v cc - 3v or 5v power supply cs - chip select u/ d - up/down control inc - increment/decrement wiper control gnd - ground description the ds1804 nv trimmer potentiometer is a nonvolatile digital potentiometer that has 100 positions. the device provides an ideal method for low-cost trimming applications using a cpu or manual control input with minimal external circuitry. wiper position of the ds1804 can be stored in eeprom memory on demand. the device?s wiper position is manipulated by a three-terminal port that provides an increment/ decrement counter controlled interface. th is port consists of the control inputs cs , inc , and u/ d . the ds1804 is available in three resi stor grades, which include a 10k , 50k , and 100k . the device is provided in an industrial temperature grade. ad ditionally, the ds1804 will operate from 3v or 5v supplies and is ideal for portable application requir ements. three packaging options are available and include the 8-pin (300mil) dip, 8-pin (150mil) so, 8-pin (118mil) sop, and the flip-chip package. ds1804 nv trimmer potentiomete r www.maxim-ic.com inc 1 8 v cc u/d 2 7 cs h 3 6 l gnd 4 5 w 8-pin dip (300mil) 8-pin so (150mil) 8-pin sop (118mil) 8-pin flip-chip package see mech. drawings section
ds1804 2 of 8 operation the ds1804 is a single nonvolatile potentiometer. the de vice has a total of 100 tap-points including the l- and h- terminals. a total of 99 resistive segments exist between the l- and h- terminals. these tap- points are accessible to the w-terminal, whose position is controlled via a three-terminal control port. a block diagram of the ds1804 is shown in figure 1. the three-terminal port of the ds1804 provides an in crement/decrement interface wh ich is activated via a chip-select input. this interface consists of the input signals cs , inc , and u/ d . these input signals control a 7-bit up/down counter. the output of the 7- bit up/down counter controls a 1 of 100 decoder to select wiper position. additionally, this interface provides for a wiper storage operation using the cs and inc input control pins. the timing diagram for the three- terminal interface control is shown in figure 2. pin descriptions v cc - power supply. the ds1804 will support supply voltages ranging from +2.7v to +5.5v. gnd - ground. h - high-terminal potentiometer. this is the high terminal of the potentiometer. it is not required that this terminal be connected to a potential greater than the l-terminal. voltage applied to the h-terminal cannot exceed the power-supply voltage, v cc , or go below ground. l - low-terminal potentiometer. this is the low terminal of the potentiometer. it is not required that this terminal be connected to a potential less than the h- terminal. voltage applied to the l-terminal cannot exceed the power-supply voltage, v cc , or go below ground. w - wiper of the potentiometer. this pin is the wiper of the potentiometer. its position on the resistor array is controlled by the three-terminal control port. voltage applied to the wiper cannot exceed the power-supply voltage, v cc , or go below ground. cs - chip select. the cs input is used to activate the control port of the ds1804. this input is active low. when in a high-state, activity on the inc and u/ d port pins will not affect or change wiper position. inc - wiper movement control. this input pr ovides for wiper position changes when the cs pin is low. wiper position changes of the w-terminal will occur one position per high-to-low transition of this input signal. position changes will not occur if the cs pin is in a high state. u/ d - up/down control. this input sets the direction of wiper movement. when in a high state and cs is low, any high-to-low transition on inc will cause a one position movement of the wiper towards the h-terminal. when in a low state and cs is low, any high-to-low transitions on inc will cause the position of the wiper to move towards the l-terminal.
ds1804 3 of 8 ds1804 block diagram figure 1 power-up/power-down conditions on power-up, the ds1804 will load the value of eepro m memory into the wiper position register (or 1 of 100 decoder). the value of this register can then be set to another wiper pos ition if desired, by using the three-terminal control port. on power-up, wiper position will be loaded within a maximum time period of 500 s once the power-supply is stable. additionally, the three-terminal interface port will be active after 50ms. on power-down, the wiper position register data will be lost. on the next device power-up, the value of eeprom memory will be loaded into the wiper position register. on shipment from the factory, dallas semiconductor does not guarantee a sp ecified eeprom memory value. this value should be set by the customer as needed. nonvolatile wiper storage wiper position of the ds1804 can be stored using the inc and cs inputs. storage of the wiper position takes place whenever the cs input transitions from low-to-high while the inc is high. once this condition has occurred the value of the current wiper position will be written to eeprom memory. the ds1804 is specified to accept 50,000 writes to eepro m before a wear-out condition. after wear-out the ds1804 will still function and wiper position can be changed during powered conditions using the three-terminal control port. however, on powe r-up the wiper-position will be indeterminate. one-time programmability (otp) the ds1804 can be easily used as an otp device. the user of the ds1804 can trim the desired value of the wiper position and set this position for storage as described above. any activity through the three- terminal port can then be prevented by connecting the cs input pin to v cc . also, an otp application does not adversely affect the number of times eeprom is written, since eeprom will only be loaded and not written during a power-up or power-down condition. on power-up, the ds1804 will load the current va lue of eeprom memory into the wiper position register.
ds1804 4 of 8 absolute maximum ratings* voltage on any pin relative to ground -1.0v to +7.0v operating temperature range -40c to +85c storage temperature range -55c to +125c soldering temperature see ipc/jedec j-std-020a specification * this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. 1) insert a (burn-in disclaimer) the dallas semiconductor ds1804 is built to the high est quality standards and manufactured for long term reliability. all dallas semiconductor devices are made us ing the same quality materials and manufacturing methods. however, the flip-chip p ackage version of the ds1804 is not exposed to environmental stresses, such as burn- in, that some industrial applications require. for specific reliability information on this product, please cont act the factory in dallas at 972-371-4448. recommended dc operating conditions (-40 c to +85 c) parameter symbol min typ max units notes supply voltage v cc +2.7 5.5 v 1 input logic 1 v ih 2.0 v cc + 0.5 v 1,2 input logic 0 v il -0.5 +0.8 +0.6 v 1,15 resistor inputs l,h,w gnd - 0.5 v cc + 0.5 v 1,3 dc electrical characteristics (-40 c to +85 c; v cc = 2.7v to 5.5v) parameter symbol min typ max units notes supply current i cc 400 a 4 input leakage i li -1 +1 a wiper resistance r w 400 1000 wiper current i w 1 ma standby current: 3 volts 5 volts i stby 10 20 48 a a 5 wiper load time t wlt 500 s 6 power-up time t pu 50 ms 14
ds1804 5 of 8 analog resistor characteristics (-40 c to +85 c; v cc = 2.7v to 5.5v) parameter symbol min typ max units notes end-to-end resistor tolerance -20 +20 % 8 absolute linearity 0.6 lsb 9 relative linearity 0.25 lsb 10 -3db cutoff frequency f cutoff mhz 11 temperature coefficient 750 ppm/ c capacitance (25 c; v cc = 2.7v to 5.5v) parameter symbol min typ max units notes input capacitance c in 5 pf 12 output capacitance c out 7 pf 12 ac electrical characteristics (-40 c to +85 c; v cc = 2.7v to 5.5v) parameter symbol min typ max units notes cs to inc setup t ci 50 ns 13 u/ d to inc setup t di 100 ns 13 inc low period t il 50 ns 13 inc high period t ih 100 ns 13 inc inactive to cs inactive t ic 500 ns 13 cs deselect time t cph 100 ns 13 wiper change to inc low t iw 200 ns 13 inc rise and fall times t r , t f 500 s 13 inc low to cs inactive t ik 50 ns 16 wiper storage time t wst 10 ms 13, 17
ds1804 6 of 8 notes: 1) all voltages are referenced to ground. 2) valid for v cc = 5v only. 3) resistor input voltages cannot go below ground or exceed v cc by the amounts as shown in the table. 4) maximum current specifications are based on the clock rate of inc input. this specification represents the current required when changing the wiper position. 5) standby current levels apply when all input s are driven to appropr iate supply levels. cs , inc , u/ d = v cc . 6) wiper load time is specified as the time require d for the ds1804 to load the wiper position with the contents of nonvola tile memory once v cc has reached a stable operating voltage equal to or greater than 2.7v. 7) the ds1804 is available in three resist or values. these include the ds1804-010, 10k ; the ds1804- 050, 50k ; and the ds1804-100, 100k . 8) valid at 25c only. 9) absolute linearity is used to compare measured wiper voltage versus expected wiper voltage as determined by wiper position. the ds1804 is specified to provide an absolute linearity of 0.60 lsb. 10) relative linearity is used to determined the change in voltage between successive tap positions. the ds1804 is specified to provide a relativ e linearity specification of 0.25 lsb. 11) -3db cutoff frequency characteristics for the ds1804 depend on potentiometer total resistance. ds1804-010, 1mhz; ds1804-050, 200 khz; and ds1804-100, 100 khz. 12) capacitance values apply at 25c. 13) see figure 2. 14) power-up time is specified as the time required before the three-terminal control becomes active after a stable power supply level has been reached. 15) at v cc = 2.7v, v il = 0.8v. 16) the inc low to cs inactive is specified to be 50ns minimum. this is the transition condition which allows the ds1804 three-terminal port to become inactive without writing the eeprom memory of the part. 17) wiper storage time, t wst , is the time require for the ds1804 to write eeprom memory for storage of a new wiper position. the maximum time required to accomplish this task is specified at 10ms.
ds1804 7 of 8 three-terminal interface timing diagram figure 2 ds1804 ordering information ordering number package operating temperature version ds1804-010 8l dip (300mil) -40c to +85c 10k ds1804-050 8l dip (300mil) -40c to +85c 50k ds1804-100 8l dip (300mil) -40c to +85c 100k ds1804z-010 8l soic (150mil) -40c to +85c 10k ds1804z-050 8l soic (150mil) -40c to +85c 50k ds1804z-100 8l soic (150mil) -40c to +85c 100k ds1804u-010 8l sop (118mil) -40c to +85c 10k ds1804u-050 8l sop (118mil) -40c to +85c 50k ds1804u-100 8l sop (118mil) -40c to +85c 100k ds1804x-010 8l fcp (118mil) -40c to +85c 10k ds1804x-050 8l fcp (118mil) -40c to +85c 50k ds1804x-100 8l fcp (118mil) -40c to +85c 100k
ds1804 8 of 8 branding information figure 3 ds1804m yywwrv ###xx 1804 rvnnn top brand bottom brand 8-pin dip 8-pin soic 8-pin usop cccccc yyww ###xx ds1804 brand codes code description values nnn pot size (dip/usop) 010 10k ohm 050 50k ohm 100 100k ohm m pot size (soic) x 10k ohm l 50k ohm c 100k ohm yyww date code. it identifies the year and work week the device was assembled eg. 0035 is the 35th work week of 2000 rv die revision generally this is a letter followed by a number (eg. b2) ###xx lot code cccccc country of assembly cccccc ds1804-nnn yywwrv ###xx
english ? ???? ? ??? ? ??? what's new products solutions design appnotes support buy company members ds1804 part number table notes: see the ds1804 quickview data sheet for further information on this product family or download the ds1804 full data sheet (pdf, 192kb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free; # = rohs/lead-exempt. more: see full data sheet or part naming conventions . 4. * some packages have variations, listed on the drawing. "pkgcode/variation" tells which variation the product uses. 5. part number notes free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis ds1804x-050/t&r 50kohms fchip;15 pin;67 dwg: 56-g7013-001a (pdf) use pkgcode/variation: bf1522-1 * -40c to +85c rohs/lead-free: no ds1804x-100/t&r 100kohms fchip;15 pin;67 dwg: 56-g7013-001a (pdf) use pkgcode/variation: bf1522-1 * -40c to +85c rohs/lead-free: no ds1804x-010/t&r 10kohms fchip;15 pin;67 dwg: 56-g7013-001a (pdf) use pkgcode/variation: bf1522-1 * -40c to +85c rohs/lead-free: no ds1804-050+ pdip;8 pin;300 dwg: 56-g5005-000a (pdf) use pkgcode/variation: p8+7 * -40c to +85c rohs/lead-free: yes materials analysis
ds1804-100 100kohms pdip;8 pin;300 dwg: 56-g5005-000a (pdf) use pkgcode/variation: p8-7 * -40c to +85c rohs/lead-free: no materials analysis ds1804-050 50kohms pdip;8 pin;300 dwg: 56-g5005-000a (pdf) use pkgcode/variation: p8-7 * -40c to +85c rohs/lead-free: no materials analysis ds1804-010 10kohms pdip;8 pin;300 dwg: 56-g5005-000a (pdf) use pkgcode/variation: p8-7 * -40c to +85c rohs/lead-free: no materials analysis ds1804-010+ pdip;8 pin;300 dwg: 56-g5005-000a (pdf) use pkgcode/variation: p8+7 * -40c to +85c rohs/lead-free: yes materials analysis ds1804-100+ pdip;8 pin;300 dwg: 56-g5005-000a (pdf) use pkgcode/variation: p8+7 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-100+t&r 100kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-010+t&r 10kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-050+ 50kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-100 100kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis ds1804z-050 50kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis ds1804z-010 10kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis
ds1804z-050+t&r soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-100+ soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-010+ 10kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis ds1804z-100/t&r 100kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis ds1804z-050/t&r 50kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis ds1804z-010/t&r 10kohms soic;8 pin;150 dwg: 56-g2008-001c (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis ds1804ur-050/t&r/ usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-1 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-100 100kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-3 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-100+t&r 100kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8+1 * -40c to +85c rohs/lead-free: yes materials analysis ds1804u-050+ usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8+3 * -40c to +85c rohs/lead-free: yes materials analysis ds1804u-010+t&r usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8+3 * -40c to +85c rohs/lead-free: yes materials analysis
ds1804u-010/t&r 10kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-3 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-050+t&r usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8+3 * -40c to +85c rohs/lead-free: yes materials analysis ds1804u-050/t&r 50kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-3 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-100/t&r 100kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-3 * -40c to +85c rohs/lead-free: no materials analysis ds1804ur-050 usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-1 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-010 10kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-3 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-010+ 10kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8+3 * -40c to +85c rohs/lead-free: yes materials analysis ds1804u-050 50kohms usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8-3 * -40c to +85c rohs/lead-free: no materials analysis ds1804u-100+ usop;8 pin;118 dwg: 21-0036j (pdf) use pkgcode/variation: u8+1 * -40c to +85c rohs/lead-free: yes materials analysis didn't find what you need? contact us: send us an email copyright 2007 by maxim integrated products, dallas semiconductor ? legal notices ? privacy policy

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