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For Audio Equipment
MN35502
D/A Converter for Digital Audio Equipment
Overview
The MN35502 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 incorporates an 8-fold oversampling digital filter that eliminates a low-pass filter after the D/A converter and thus greatly reduces the power consumption of the overall D/A conversion system. Use of single-channel 4PEM output yields a D/A converter with a low distortion ratio and high signal-tonoise ratio. The chip makes a major contribution to reducing the cost and size of CD players and other digital audio equipment.
Pin Assignment
DIN LRCK BCK M4 DVDD2 CKO DVSS2 M1 OUT1C OUT1B AVDD1 OUT1D OUT1A AVSS1
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
RSBDN RSBUP M3 DVDD1 XIN XOUT DVSS1 M2 OUT2C OUT2B AVDD2 OUT2D OUT2A AVSS2
Features
Built-in 20-bit, 8-fold oversampling digital filter * 2-fold oversampling digital filters with 3-stage cascade configuration Bandwidth ripple: within 0.0042 dB for 0 to 0.454 fs Cutoff band attenuation 10.454 fs: min. 94.8dB 20.454 fs: min. 77.4dB 40.454 fs: min. 66.8dB Transition bandwidth 0.469 fs: - 0.12dB 0.531 fs: -38dB * Digital filter output: 24 bits (Output after data compression with primary noise shaper) Built-in digital de-emphasis fs=44.1 kHz 0 to 18kHz max. deviation 0.055dB 18 to 20kHz max. deviation 0.115dB Built-in digital attenuation Up/down over 32 steps Support for double-speed operation (192 fs clock)
(TOP VIEW) SOP028-P-0375
8PEM output configuration (4PEM output per channel) Support for low-voltage (3.3-volt) operation Choice of system clocks: 192 fs, 256 f s, 384 fs, 512 f s, 576 fs Choice of input data formats: left-packed, rightpacked, I2 S bus (16 or 20 bits, alternating channel input, MSB first)
Applications
CD players and other digital audio equipment
MN35502
Block Diagram
For Audio Equipment
DIN
1
DF Block OSC Block
24
XIN
LRCK
2
I/F Block
* De-emphasis IIR Filter * Attenuater * 8fs Over sampling Digital Filter
23
XOUT
BCK
3
M1
8 6 21 Mode Control Block 1st. Order Noise shaper Block CKO
M2
M3
26
M4
4
RSBDN
28
VANS Noise shaper Block
RSBUP
27
OUT1C
9
20
OUT2C
OUT1B
10 PEM Block PEM Block
19
OUT2B
OUT1D
12
17
OUT2D
OUT1A
13 D/A Block
16
OUT2A
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 Pin Name DIN LRCK BCK M4 DVDD2 CKO DVSS2 M1 OUT1C OUT1B AVDD1 OUT1D OUT1A AVSS1 AVSS2 OUT2A OUT2D AVDD2 OUT2B OUT2C M2 DVSS1 XOUT XIN DVDD1 M3 RSBUP RSBDN Function Description Serial data pin (MSB first) LR synchronization signal input pin (fs rate) Data shift bit clock input pin Operating mode selection pin 4 (See Table 1.) Power supply pin 2 for digital circuits Clock output pin Ground pin for digital circuits Operating mode selection pin 1, with pull-up resistor (See Table 1.) PEM output pin 1C PEM output pin 1B
MN35502
(Left channel with reversed phase) (Left channel with same phase)
Power supply pin 1 for analog circuits PEM output pin 1D PEM output pin 1A Ground pin 1 for analog circuits Ground pin 2 for analog circuits PEM output pin 2A PEM output pin 2D (Right channel with same phase) (Right channel with reversed phase) (Left channel with reversed phase) (Left channel with same phase)
Power supply pin 2 for analog circuits PEM output pin 2B PEM output pin 2C (Right channel with same phase) (Right channel with reversed phase)
Operating mode selection pin 2, with pull-up resistor (See Table 1.) Ground pin 1 for digital circuits Crystal oscillator pin Crystal oscillator pin (external clock input pin) (Built-in feedback resistor) Power supply pin 1 for digital circuits Operating mode selection pin 3, with pull-up resistor Reset pin/digital attenuation control pin Reset pin/digital attenuation control pin (See Table 1.) (See Table 2.) (See Table 2.) (Ground for oscillator circuit)
MN35502
Operating Mode Descriptions Table 1. MN35502 Operating Modes
Mode Selection Pins M1 M2 M3 M4 RSBUP Mode Input data format Input word length (bit) Data when LRCK=H XIN clock frequency (fs) CKO output frequency (fs) Digital attenuation De-emphasis (f s=44.1kHz) VANS oversampling (fs) Theoretical signal-to-noise ratio Output level (dB) 0.666 x AV DD 0.4995 x AVDD 64 134 32 107 134 64 128 64 134 384 384 16 0 1 2 3 4 5 L L H L L H H L L H L L H L
For Audio Equipment
Pin States and Operating Modes L H H H H 8 9 A B C D I2S E
Rightpacked
H H L L H L H H L L H L H H H
60 61 70 71
F I2S
Right-packed 20 Left channel Test Mode 192 192 Available 384 384 512 512 Not available 16 20 16
Rightpacked Leftpacked Rightpacked Leftpacked Rightpacked
16 20 16 20 16 20 16 20 R L R L L R L R
384
576
256 64
384
32 64 32 Available
--
O
--
O
--
O
----
O 96 150 64 128 96 144
0.666 x AVDD
0.4995 x AVDD
Notes 1: Modes 2 and 3 support fs clock speeds up to 88.2 kHz. 2: Modes A, B, E, and F support fs clock speeds up to 32 kHz; the others, up to 48 kHz.
For Audio Equipment
Functional Descriptions
Digital attenuation and reset Table 2 shows how the inputs from the two pins RSBUP and RSBDN control digital attenuation.
MN35502
Table 2. Attenuation Modes
Pin Name RSBUP RSBDN Mode Volume L L Reset Mute (-) Pin States and Operating Modes L L H Mute Normal 0dB H
Attenuation control UP DOWN
Notes 1: The upward arrow indicates the rising edge change of the input signal; the paired arrows, the rising and falling edge changes. 2: Always reset the chip after applying the power, restarting the clock, or changing the clock speed. (Wait for the crystal oscillation to stabilize and then apply a reset signal at least eight LRCK clock cycles long.) 3: Digital attenuation is not available for modes with a master clock of 512 fs (modes 60 to 70).
There are a total of 32 attenuation levels. According to the attenuation control shown in Table-2, 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 32 fs period, so always use a frequency of 16 fs or less for changes in the RSBUP and RSBDN signals. Do not simultaneously change the RSBUP and RSBDN signals unless setting up for a reset.
MN35502
Conversion Characteristics
DVDD=5.0V, DVSS=0V, AVDD=5.0V, AVSS, f=16.9344MHz, Ta=25C
For Audio Equipment
Analog Characteristics for 20-bit, 1 fs input Parameter Symbol Test Condition Signal-to-noise ratio Dynamic range Total harmonic distortion Output level 1kHz F.S. SN D.R. THD+N EIAJ (kHz) EIAJ (kHz) EIAJ (kHz)
min
typ 114 113 0.0006 2.1
max
Unit dB dB
0.0010
% Vrms
The above analog characteristics are based on measurements with the sample application circuit using mode 4.
For Audio Equipment
Application Circuit Example
R ch.
180 180
MN35502
360
0.0056F 47F 27k 4.7k
0.0056F 27k 47F
47k 560F 510F 0.022FG 0.0015F
+ + -
0.022FG
+
510F 560F
-
0.0039FG
0.0039FG
-12V
18 18 0.1F
0.047F 1.8kF
0.047F
1.8kF
0.0015F
0.047F
0.0015F
360
L ch. 0.047F
1.8kF
330pFG
+ -
0.0015F
GND
1.8kF
1.8kF
1.8kF 1.8kF
+
0.1F
-
47F +
18 18
0.047F
0.047F 47F 47F
330pFG
+
+12V
330pFG
13kF
330pFG
0.047F
0.047F
47F
-
+
78M05
OUT IN
13kF
13kF
180
180
180
0.1F
330pF
330pF 100
AVDD
+
470F 15 AVSS2 16 OUT2A 1.5F 17 OUT2D 27kF 18 AVDD2 19 OUT2B 27kF 20 OUT2C 27kF 21 M2 560 22 DVSS1 23 XOUT 1.5F 24 XIN 25 DVDD1 26 M3 560 27 RSBUP 28 RSBDN (TOP VIEW) 27kF 180 180 AVSS1 14 OUT1A 13 OUT1D 12 AVDD1 11 OUT1B 10 OUT1C 9 M1 8 DVSS2 7 CKO 6 DVDD2 5 M4 4 BCK 3 LRCK 2 DIN 1
470F 27kF
1.5F
GND
27kF 27kF 27kF 560
1.5F
+
100
180
13kF
+
+
+
+
-
-
-
1.8kF
Xtal 16.9344MHz 100F
220F
M1 M2 M3
11k
180 560 560 560 560
DVDD
18
+
+
10
M4 RSBUP RSBDN
11k
GND
0.1F 11k 74HC14A
100k
11k
UP DOWN
47F
47F
0.1F
100k 0.047F 74HC4050 9 DATA LRCK BCK CK GND 0.047F
18 5V 18
+
+
GND
1
100
560 560 560
MN35502
Package Dimensions (Unit: mm)
SOP028-P-0375
For Audio Equipment
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
Request for your special attention and precautions in using the technical information and semiconductors described in this material
(1) An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this material and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. (2) The technical information described in this material is limited to showing representative characteristics and applied circuit examples of the products. It does not constitute the warranting of industrial property, the granting of relative rights, or the granting of any license. (3) The products described in this material are intended to be used for standard applications or general electronic equipment (such as office equipment, communications equipment, measuring instruments and household appliances). Consult our sales staff in advance for information on the following applications: * Special applications (such as for airplanes, aerospace, automobiles, traffic control equipment, combustion equipment, life support systems and safety devices) in which exceptional quality and reliability are required, or if the failure or malfunction of the products may directly jeopardize life or harm the human body. * Any applications other than the standard applications intended. (4) The products and product specifications described in this material are subject to change without notice for reasons of modification and/or improvement. At the final stage of your design, purchasing, or use of the products, therefore, ask for the most up-to-date Product Standards in advance to make sure that the latest specifications satisfy your requirements. (5) When designing your equipment, comply with the guaranteed values, in particular those of maximum rating, the range of operating power supply voltage and heat radiation characteristics. Otherwise, we will not be liable for any defect which may arise later in your equipment. Even when the products are used within the guaranteed values, redundant design is recommended, so that such equipment may not violate relevant laws or regulations because of the function of our products. (6) When using products for which dry packing is required, observe the conditions (including shelf life and after-unpacking standby time) agreed upon when specification sheets are individually exchanged. (7) No part of this material may be reprinted or reproduced by any means without written permission from our company.
Please read the following notes before using the datasheets
A. These materials are intended as a reference to assist customers with the selection of Panasonic semiconductor products best suited to their applications. Due to modification or other reasons, any information contained in this material, such as available product types, technical data, and so on, is subject to change without notice. Customers are advised to contact our semiconductor sales office and obtain the latest information before starting precise technical research and/or purchasing activities. B. Panasonic is endeavoring to continually improve the quality and reliability of these materials but there is always the possibility that further rectifications will be required in the future. Therefore, Panasonic will not assume any liability for any damages arising from any errors etc. that may appear in this material. C. These materials are solely intended for a customer's individual use. Therefore, without the prior written approval of Panasonic, any other use such as reproducing, selling, or distributing this material to a third party, via the Internet or in any other way, is prohibited.
2001 MAR

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