Page 1
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.
Features
Built-in 8-fold oversampling digital filter using I2S bus
•Bandwidth ripple: within ±0.05 dB for 0 to 0.454 f
•Cutoff band attenuation (0.546 to 7.454) f
(n–0.03125) f
to (n+0.03125) f
s
n=1 to 7 (integer)
(The above characteristics include those for an
external primary low-pass filter with f
Built-in digital de-emphasis
=32.0 kHz 0 to14.5 kHz max. deviation
f
s
+0.072dB/ – 0.047 dB
fs=44.1 kHz 0 to 20 kHz max. deviation
+0.077dB/ – 0.028 dB
f
=48.0 kHz 0 to 21.8 kHz max. deviation
s
+0.052dB/ – 0.053 dB
(The above characteristics include those for an
external primary low-pass filter with f
The digital filter is designed to deliver the above
bandwidth characteristics when used with an external
primary low-pass filter with f
=1.95 fs.
c
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
: 37dB
s
: min. 60dB
s
=1.95 fs.)
s
=1.95 fs.)
c
Pin Assignment
, 256f
s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
(TOP VIEW)
SOP028-P-0375
, 384f
, 512fs , 576f
s
s
28
27
26
25
24
23
22
21
20
19
18
17
16
15
MA
DIN
LRCK
BCK
MB
DV
DD2
CKO
DV
SS2
M1
OUT1C
N.C.
AV
DD1
OUT1D
AV
SS1
s
Choice of system clocks:
192f
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
PDO
MD
MC
M3
DV
DD1
XIN
XOUT
DV
SS1
M2
OUT2C
N.C.
AV
DD2
OUT2D
AV
SS2
s
Page 2
MN35503 For Audio Equipment
Block Diagram
XIN
PDO
232822
OSC
Block
XOUT
7
CKO
OUT2C
19
OUT2D
16
2
DIN
I/F Block
3
LRCK
DF Block
• 8fs
Over sampling
Digital Filter
• De-emphasis
Filter
• Attenuater
4
9
M1
BCK
1st.
Order
Noise
shaper
Block
Mode Control Block
20
25
M3
M2
PEM
Block
VANS
Block
D/A Block
PEM
Block
1
5
26
MA
MB
MC
27
MD
10
OUT1C
13
OUT1D
Page 3
For Audio Equipment
MN35503
Pin Descriptions
Pin No. Symbol Function Description
1 MA Operating mode selection pin 4 (See Table 1.)
2 DIN Serial data input pin (MSB first)
3 LRCK LR synchronization signal input pin (fs rate)
4 BCK Data shift bit clock input pin
5 MB Operating mode selection pin 5 (See Table 1.)
6DV
DD2
Power supply pin 2 for digital circuits
7 CKO Clock output pin
8DV
SS2
Ground pin 2 for digital circuits
9 M1 Operating mode selection pin 1, with pull-up resistor (See Table 1.)
10 OUT1C PEM output pin 1C (Left channel with reversed phase)
11 N.C. No connection (Leave this pin open.)
12 AV
DD1
Power supply pin 1 for analog circuits
13 OUT1D PEM output pin 1D (Left channel with reversed phase)
14 AV
15 AV
SS1
SS2
Ground pin 1 for analog circuits
Ground pin 2 for analog circuits
16 OUT2D PEM output pin 2D (Right channel with reversed phase)
17 AV
DD2
Power supply pin 2 for analog circuits
18 N.C. No connection (Leave this pin open.)
19 OUT2C PEM output pin 2C (Right channel with reversed phase)
20 M2 Operating mode selection pin 2, with pull-up resistor (See Table 1.)
21 DV
SS1
Ground pin 1 for digital circuits (Ground for oscillator circuit)
22 XOUT Crystal oscillator pin
23 XIN Crystal oscillator pin (external clock input pin) (Built-in feedback resistor)
24 DV
DD1
Power supply pin 1 for digital circuits (for oscillation circuit)
25 M3 Operating mode selection pin 3 (See Table 1.)
26 MC Reset pin/digital attenuation control pin (See Table 1.)
27 MD Reset pin/digital attenuation control pin (See Table 1.)
28 PDO Phase comparator output pin (tristate output)*
Note*1: This pin provides tristate output indicating the result of comparing the phases of the internal fs-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.
1
Page 4
MN35503 For Audio Equipment
Operating Mode Descriptions
Table 1-1. MN35503 Operating Modes
Mode Selection Pins Pin States and Operating Modes
M1 Includes pull-up resistor L
M2 Includes pull-up resistor L H
M3 L H L H
MA LHLH MDAT L H
MB LHLHLHLH MCLK LHLH
MC RSBUP MLAT RSBUP
MD RSBDN L H RSBDN
MODE 000102031011121
Input data form Right-packed
Input word length (bits) 16
LRCK level for left channel data H
XIN clock frequency (f
CKO output frequency (f
1
*
) 384 192 576 384/576 256/384 256
s
) 384 192 576
s
2
*
DE-EMP. (fs=[kHz]) – 44.1 32 48 – 44.1 – 32 See Table 3 – 44.1 32 48
Output level 0.598 × AV
DD
VANS oversampling (fs) 64 32 96 64/96 64/96 64
Theoretical signal-to-noise
122 95 138 122/138 116/132 116
ratio (dB)
Notes
*1:During 192 f
*2:During 576 f
modes, it supports up to 48 kHz.
operation, the chip supports fs clock speeds up to 88.2 kHz.
s
operation and 384 fs operation in modes 21 or 61, the chip supports fs clock speeds up to 32 kHz; for other
s
2
3
0
2
1
3031323
Serial mode
2
*
See Table 3.
See Table 3.
2
*
384/576 256/384
See Table 3.
See Table 3.
0.448 × AV
3
STOP
DD
Page 5
For Audio Equipment
MN35503
Table 1-2. MN35503 Operating Modes
Mode Selection Pins Pin States and Operating Modes
M1 Includes pull-up resistor H
M2 Includes pull-up resistor L H
M3 L H L H
MA LHLH MDAT L H
MB LHLHLHLH MCLK L H L H
MC RSBUP MLAT RSBUP
MD RSBDN L H RSBDN
MODE 404142435051525
Input data form Right-packed I2S Right-packed
Input word length (bits) 16 20 to 20 16 20
LRCK level for left channel data L H L H
XIN clock frequency (f
CKO output frequency (f
1
*
) 384 576 384 576 384/576 256/384 512
s
) 384 STOP 384 STOP 384 576
s
1
*
DE-EMP.(fs=[kHz]) – 48 44.1 32 – 44.1 – See Table 3. – 44.1 –
Output level 0.598 × AV
VANS oversampling (fs) 64 94 64 96 64/96 64/96 64
Theoretical signal-to-noise
122 138 122 138 122/138 116/132 122
ratio (dB)
6
3
0
Serial mode
1
*
See Table 3. See Table 3.
384/576 256/384
See Table 3. See Table 3.
DD
6
1
1
*
0.448 × AV
70 71 72 7
512
DD
3
Test Mode
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.
Page 6
MN35503 For Audio Equipment
Serial Mode (MODE=2
MDAT
(MA)
MCLK
(MB)
MLAT
(MC)
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 D2 D3 D4 D5 Code Output Level (dB)
0 0 0 0 0 00H 0.0
0 0 0 0 1 01H –1.0
0, 21, 60, 61
D1 D2 D3 D4 D5 D6 D7 D8
Figure 1. Serial Mode Input Signal Timing
)
00010 02H –2.0
.
.
.
.
.
1 1 1 1 0 1EH – 48.1
11111 1FH
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 D7 D8 at MD=L at MD=H fs=[kHz]
0 0 0 384 256 OFF —
0 0 1 384 256 32 —
0 1 0 384 256 OFF ●
0 1 1 576 384 32 —
1 0 0 384 256 44.1 —
1 0 1 384 256 48 —
1 1 0 576 384 OFF ●
1 1 1 576 384 OFF —
0=L, 1=H MD=L: MODE=20, 6
MD=H: MODE=21, 6
0
1
.
.
.
.
.
DE-EMP.
.
.
.
.
.
–
∞ (mute)
Reset
●: Reset
—: Normal
Page 7
For Audio Equipment
MN35503
Digital attenuation and reset (Parallel mode)
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 Pin States and Operating Modes
MC (RSBUP) L ↑↓ L ↑ H
MD (RSBDN) L L ↑ H ↑
Mode Reset Mute Normal Attenuation control
Volume Mute (–∞) 0dB UP DOWN
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 f
changes in the RSBUP and RSBDN signals. Note, however, that changes in attenuation level require a period corresponding to 2 f
to complete.
s
Do not simultaneously change the RSBUP and RSBDN signals unless setting up for a reset.
period, so always use a frequency of 8 fs or less for
s
Conversion Characteristics
DVDD=5.0V, DVSS=0V, AVDD=5.0V, AVss=0V, f=16.9344MHz, Ta=25˚C
Analog Characteristics for 20-bit, 1 fs input
Parameter Symbol Test Condition min typ max Unit
Signal-to-noise ratio EIAJ (1kHz) 108 dB
Dynamic range D.R. EIAJ (1kHz) 107 dB
Total harmonic distortion THD+N EIAJ (1kHz) 0.0008 0.0015 %
Output level 1 kHz full scale 2.0 V
The above analog characteristics are based on measurements with the sample application circuit using mode 50.
rms
Page 8
MN35503 For Audio Equipment
Application Circuit Example
–12V
GND
+12V
DD
AV
DD
DV
OUT
78M05
0.1µF
IN
GND
GND
0.1µF
0.1µF
10Ω
+
100µF
100Ω
22µF
0.018µFG
560ΩF
620ΩF
100pFG
56kΩF
1.2kΩF
3.3kΩ
+
470µF
56kΩF
56kΩF
10pF
1.5µF
10pF
16.9344MHz
560Ω
OUT R
330Ω
+
3300pFG
–
560pF
1.5µF
560Ω
560Ω
560Ω
5600pF
27k
–
+
0.033µF
3.3kΩ
Ω
47µF
100Ω
100Ω
+
47µF
3.3kΩ
AV
15
SS2
OUT2D
16
AV
17
DD2
N.C.
18
OUT2C
19
M2
20
DV
21
SS1
XOUT
22
XIN
23
DV
24
DD1
25
M3
26
MC
27
MD
28
PDO
(
TOP VIEW
OUT L
5600pF
Ω
330
22µF
27kΩ
–
+
560ΩF
0.018µFG
3300pFG
100pFG
F
Ω
1.2k
+
27Ω
620ΩF
56kΩF
220µF
+
560Ω
10kΩ
10kΩ
M1
M2
M3
MA
MB
MC
47µF
+
3.3kΩ
+
47µF
+
0.033µF
100
3.3kΩ
100
+
560pFG
–
3.3kΩ
Ω
Ω
10Ω
470µF
AV
14
OUT1D
AV
DD1
N.C.
OUT1C
M1
DV
CKO
DV
DD2
MB
BCK
LRCK
DIN
MA
SS1
SS2
13
12
11
10
9
8
7
6
5
4
3
2
1
56kΩF
1.5µF
56kΩF
560Ω
1.5µF
180Ω
560Ω
)
560Ω
560Ω
560Ω
0.1µF
10kΩ
100kΩ
0.1µF
74HC14
0.1µF
100kΩ
10kΩ
10kΩ
100kΩ
MD
MCLK
UP
DOWN
+5V
18Ω
18Ω
1.5µF
1
GND
560Ω
DATA
560Ω
LRCK
560Ω
BCK
100Ω
CKO
1.5µF
74HC4050
9
GND
Page 9
For Audio Equipment
Package Dimensions (Unit: mm)
SOP028-P-0375
17.80
±0.20
MN35503
28
15
0.05
-
+0.10
1.10±0.20
0.15
7.20±0.202.00±0.200.10±0.10
0 to 10°
0.30min.
114
2.40max. 9.40±0.30
(0.65) 0.40
1.27
±0.10
SEATING PLANE
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