Document
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 .