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| For Audio Equipment MN35503 D/A Converter for Digital Audio Equipment Overview The MN35503 is a CMOS digital-to-analog converter designed especially for PCM digital audio equipment. It features a built-in digital filter with 16/20-bit input. It uses pulse edge modulation (PEM) and JVC advanced noise shaping (VANS) to yield the high resolution and low distortion ratio equivalent to those of 20-bit systems covering the range between 0 and 20 kHz. The chip incorporating an 8-fold oversampling digital filter that eliminates a low-pass filter after the D/A converter and greatly reduces the power consumption of the overall D/A conversion system. The chip makes a major contribution to reducing the cost and size of CD players and other digital audio equipment. Pin Assignment MA DIN LRCK BCK MB DVDD2 CKO DVSS2 M1 OUT1C N.C. AVDD1 OUT1D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PDO MD MC M3 DVDD1 XIN XOUT DVSS1 M2 OUT2C N.C. AVDD2 OUT2D AVSS2 Features Built-in 8-fold oversampling digital filter using I2S bus * Bandwidth ripple: within 0.05 dB for 0 to 0.454 fs * Cutoff band attenuation (0.546 to 7.454) fs : 37dB (n-0.03125) fs to (n+0.03125) fs : min. 60dB n=1 to 7 (integer) (The above characteristics include those for an external primary low-pass filter with fs=1.95 fs.) Built-in digital de-emphasis fs=32.0 kHz 0 to14.5 kHz max. deviation +0.072dB/ - 0.047 dB fs=44.1 kHz 0 to 20 kHz max. deviation +0.077dB/ - 0.028 dB fs=48.0 kHz 0 to 21.8 kHz max. deviation +0.052dB/ - 0.053 dB (The above characteristics include those for an external primary low-pass filter with fc=1.95 fs.) The digital filter is designed to deliver the above bandwidth characteristics when used with an external primary low-pass filter with f c=1.95 fs. Built-in digital attenuation Up/down over 32 steps Support for double-speed operation (192 fs clock) 4PEM output configuration (2PEM output per channel) Support for low-voltage (3.0 volt) operation AVSS1 (TOP VIEW) SOP028-P-0375 Choice of system clocks: 192fs , 256fs, 384fs , 512fs , 576fs Choice of input data formats: right-packed or I2S bus (16 or 20 bits, alternating channel input, MSB first) Built-in phase comparator Applications CD players and other digital audio equipment MN35503 Block Diagram For Audio Equipment 28 23 22 7 19 OSC Block DF Block * 8fs Over sampling Digital Filter * De-emphasis Filter * Attenuater 1st. Order Noise shaper Block PEM Block VANS Block D/A Block PEM Block I/F Block Mode Control Block 20 25 26 27 10 13 OUT1D 2 3 4 9 1 LRCK BCK M1 M2 M3 MA MB 5 MC DIN MD OUT1C 16 OUT2D OUT2C XOUT CKO PDO XIN For Audio Equipment Pin Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Symbol MA DIN LRCK BCK MB DVDD2 CKO DV SS2 M1 OUT1C N.C. AVDD1 OUT1D AV SS1 AV SS2 OUT2D AVDD2 N.C. OUT2C M2 DV SS1 XOUT XIN DVDD1 M3 MC MD PDO Function Description Operating mode selection pin 4 Serial data input pin (MSB first) LR synchronization signal input pin (fs rate) Data shift bit clock input pin Operating mode selection pin 5 Power supply pin 2 for digital circuits Clock output pin Ground pin 2 for digital circuits Operating mode selection pin 1, with pull-up resistor PEM output pin 1C (Left channel with reversed phase) No connection (Leave this pin open.) Power supply pin 1 for analog circuits PEM output pin 1D (Left channel with reversed phase) Ground pin 1 for analog circuits Ground pin 2 for analog circuits PEM output pin 2D (Right channel with reversed phase) Power supply pin 2 for analog circuits No connection (Leave this pin open.) PEM output pin 2C (Right channel with reversed phase) Operating mode selection pin 2, with pull-up resistor Ground pin 1 for digital circuits (Ground for oscillator circuit) Crystal oscillator pin MN35503 (See Table 1.) (See Table 1.) (See Table 1.) (See Table 1.) Crystal oscillator pin (external clock input pin) (Built-in feedback resistor) Power supply pin 1 for digital circuits Operating mode selection pin 3 Reset pin/digital attenuation control pin Reset pin/digital attenuation control pin Phase comparator output pin (tristate output)*1 (for oscillation circuit) (See Table 1.) (See Table 1.) (See Table 1.) Note*1: This pin provides tristate output indicating the result of comparing the phases of the internal f s-rate-signal and the LRCK input signal. It is at "H" level when the LRCK signal leads and is at "L" level when the signal lags. At all other times, it is in the high-impedance state. MN35503 Operating Mode Descriptions Table 1-1. MN35503 Operating Modes Mode Selection Pins M1 Includes pull-up resistor M2 Includes pull-up resistor M3 MA MB MC MD MODE 00 01 02 L L H L L H H L L H L L H H H L For Audio Equipment Pin States and Operating Modes L H H L L H L H H MDAT MCLK MLAT L H 21 30 RSBUP RSBDN 03 10 11 12 13 RSBUP RSBDN 31 32 33 20 Serial mode Input data form Input word length (bits) LRCK level for left channel data *1 XIN clock frequency (fs) 384 192 Right-packed 16 H *2 576 *2 384/576 *2 256/384 256 See Table 3. See Table 3. CKO output frequency (fs) DE-EMP. (fs=[kHz]) Output level VANS oversampling (fs) Theoretical signal-to-noise ratio (dB) 64 122 384 - 44.1 32 48 192 576 32 384/576 256/384 STOP - 44.1 32 0.448 x AVDD 64/96 122/138 64/96 116/132 64 116 48 See Table 3. See Table 3. - 44.1 - 0.598 x AVDD 32 95 96 138 See Table 3 Notes * 1: During 192 f s operation, the chip supports fs clock speeds up to 88.2 kHz. * 2: During 576 f s operation and 384 fs operation in modes 21 or 61, the chip supports fs clock speeds up to 32 kHz; for other modes, it supports up to 48 kHz. For Audio Equipment MN35503 Table 1-2. MN35503 Operating Modes Mode Selection Pins M1 Includes pull-up resistor M2 Includes pull-up resistor M3 MA MB MC MD MODE 40 41 42 L L H L L H H L L H L L H H H L MDAT MCLK MLAT L 51 52 53 60 H 61 70 L L H L Pin States and Operating Modes H H H H H RSBUP RSBDN 43 50 RSBUP RSBDN 71 72 73 Serial mode Input data form Input word length (bits) LRCK level for left channel data Right-packed 16 L *1 20 H *1 384 576 I2S to 20 L *1 384/576 *1 256/384 Right-packed 16 H Test Mode - 20 XIN clock frequency (fs) 384 576 512 See Table 3. See Table 3. CKO output frequency (fs) DE-EMP.(fs=[kHz]) Output level VANS oversampling (fs) Theoretical signal-to-noise ratio (dB) 64 122 94 138 64 122 384 - STOP 384 STOP 384 - 44.1 576 - 384/576 256/384 512 - 44.1 See Table 3. See Table 3. 48 44.1 32 See Table 3. 0.598 x AVDD 96 138 64/96 122/138 0.448 x AVDD 64/96 116/132 64 122 Note*1: During 576 fs operation and 384 fs operation in modes 21 or 61, the chip supports fs clock speeds up to 32 kHz; for other modes, it supports up to 48 kHz. MN35503 Serial Mode (MODE=20, 21, 60, 61) MDAT (MA) For Audio Equipment D1 D2 D3 D4 D5 D6 D7 D8 MCLK (MB) MLAT (MC) Figure 1. Serial Mode Input Signal Timing Table 2. Attenuation Control The 5-bit from D1 (MSB) to D5 (LSB) specifies a code of the 32 available attenuation step. (See Table 2.) D1 0 0 0 D2 0 0 0 D3 0 0 0 D4 0 0 1 D5 0 1 0 Code 00H 01H 02H Output Level (dB) 0.0 -1.0 -2.0 . . . . . 1 1 1 1 1 1 1 1 0 1 . . . . . 1EH 1FH . . . . . - 48.1 - (mute) 0=L, 1=H Table 3. Mode Control The combination of 3-bit from pins D6 to D8 controls XIN clock frequency, de-emphasis, and reset operation. XIN Clock Frequency [fs] D6 0 0 0 0 1 1 1 1 D7 0 0 1 1 0 0 1 1 D8 0 1 0 1 0 1 0 1 at MD=L 384 384 384 576 384 384 576 576 at MD=H 256 256 256 384 256 256 384 384 DE-EMP. fs=[kHz] OFF 32 OFF 32 44.1 48 OFF OFF Reset q: Reset --: Normal -- -- q -- -- -- q -- 0=L, 1=H MD=L: MODE=2 0, 6 0 MD=H: MODE=21, 6 1 For Audio Equipment Digital attenuation and reset (Parallel mode) MN35503 Table 4 shows how the inputs from the two pins MC (RSBUP) and MD (RSBDN) control digital attenuation except the serial modes. Table 4. Attenuation Modes Pin Name MC (RSBUP) MD (RSBDN) Mode Volume Pin States and Operating Modes L L Mute Mute (-) Normal 0dB H UP L L Reset H DOWN Attenuation control Note: The upward arrow indicates the rising edge change of the input signal; the paired arrows, the rising and falling edge changes. There are a total of 32 attenuation levels. According to the attenuation control shown in Table-4, volume goes up or down in one step every input-signal rising-edge. Still, in the 0 dB state, up-pulse does not change the volume. Similary, in the muting state (-), downpulse does not change the volume. The change of the input signals is detected by inner clock of 16 fs period, so always use a frequency of 8 fs or less for changes in the RSBUP and RSBDN signals. Note, however, that changes in attenuation level require a period corresponding to 2 fs to complete. Do not simultaneously change the RSBUP and RSBDN signals unless setting up for a reset. Conversion Characteristics DV DD=5.0V, DVSS=0V, AVDD=5.0V, AVss=0V, f=16.9344MHz, Ta=25C Analog Characteristics for 20-bit, 1 fs input Parameter Symbol Signal-to-noise ratio Dynamic range Total harmonic distortion Output level D.R. THD+N Test Condition EIAJ (1kHz) EIAJ (1kHz) EIAJ (1kHz) 1 kHz full scale min typ 108 107 0.0008 2.0 max Unit dB dB 0.0015 % Vrms The above analog characteristics are based on measurements with the sample application circuit using mode 50 . MN35503 Application Circuit Example OUT R OUT L For Audio Equipment -12V 330 22F 0.1F 5600pF 27k 5600pF 27k 330 22F GND 620F 0.018FG 0.1F +12V 560F 560F 3300pFG 3300pFG 100 100 78M05 IN 100pFG 1.2kF 100pFG + 47F + + 47F + + OUT 100 100 56kF 47F 47F 3.3k 1.2kF 0.033F 3.3k 0.1F 560pF 3.3k 3.3k 0.033F 560pFG 3.3k 10 3.3k AVDD 10 470F 15 AVSS2 56kF 16 OUT2D 17 AVDD2 1.5F 18 N.C. 19 OUT2C 56kF 20 M2 560 21 DVSS1 10pF 22 XOUT 1.5F 23 XIN 10pF 24 DVDD1 16.9344MHz 25 M3 26 MC 27 MD 28 PDO (TOP VIEW) 560 560 560 + 470F AVSS1 14 56kF OUT1D 13 1.5F AVDD1 12 N.C. 11 OUT1C 10 56kF M1 9 560 DVSS2 8 1.5F CKO 7 180 DVDD2 6 MB 5 560 BCK 4 LRCK 3 DIN 2 MA 1 560 560 560 GND 56kF + - 620F 0.018FG + + - - + 100F 220F + - M1 M2 10k 560 27 10k M3 MA MB MC MD 0.1F DVDD 100 + 74HC14 10k MCLK UP DOWN 100k 100k 10k 0.1F GND 0.1F 10k 100k 74HC4050 18 +5V 1.5F 1.5F 18 560 560 560 100 CKO GND 9 GND 1 DATA LRCK BCK For Audio Equipment Package Dimensions (Unit: mm) SOP028-P-0375 MN35503 17.800.20 28 15 1.100.20 0.15 -0.05 +0.10 7.200.20 9.400.30 0 to 10 0.30min. 1 14 2.40max. 2.000.20 (0.65) 1.27 0.400.10 SEATING PLANE 0.100.10 |
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