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YAC523

Electric Variable Resistance 2

YAC523
Electric Variable Resistance 2
Outline
YAC523 (EVR2) is a 7ch high grade digital volume LSI for high-end audio systems. Owing to its built-in high-quality sound operational amplifier, output with wide dynamic range and low distortion factor can be obtained. YAC523 is able to control each channel through a serial data interface in 255 steps at 0.5dB per step, and can allow configuration of a system with 8 channels or more by using a daisy chain connection. Owing to its zero-cross detection function, the device is able to suppress audible noise that may occur at a quick volume change.
Features
YAC523CATALOG CATALOG No.:LSI-4AC523A2 2003.5
YAC523
Terminal configration
YAC523-VZ
AVSS ZCEN1 ZCEN2 CSN SDATAI SCLK SDATAO TE2 TE1 DGND REF AVSS
REF1B
REF1A REF2B REF2A REF3B REF3A REF4B REF4A REF5A REF5B REF6A REF6B REF7A
REF7B
YAC523
Terminal function
Function Minus power supply for analog (-6.0V Typ.) Plus power supply for analog (+6.0V Typ.) ch1 analog input When avoid the use of this terminal, connect to ground. ch2 analog input And please use the output impedance of the source of input ch3 analog input signal less than 2.2k. ch4 analog input ch5 analog input ch6 analog input ch7 analog input Plus power supply for analog (+6.0V Typ.) Minus power supply for analog (-6.0V Typ.) ch7 analog reference voltage input 7B Connect to ground directly. ch7 analog reference voltage input 7A Connect to ground through 33F. ch6
analog reference voltage input 6B Connect to ground directly. ch6
analog reference voltage input 6A Connect to ground through 33F. ch5
analog reference voltage input 5B Connect to ground directly. ch5
analog reference voltage input 5A Connect to ground through 33F. ch4
analog reference voltage input 4A Connect to ground through 33F. ch4
analog reference voltage input 4B Connect to ground directly. ch3
analog reference voltage input 3A Connect to ground through 33F. ch3
analog reference voltage input 3B Connect to ground directly. ch2
analog reference voltage input 2A Connect to ground through 33F. ch2
analog reference voltage input 2B Connect to ground directly. ch1
analog reference voltage input 1A Connect to ground through 33F. ch1
analog reference voltage input 1B Connect to ground directly. Non connection or connect to ground. Non connection or connect to ground. ch7 analog output ch6 analog output ch5 analog output ch4 analog output ch3 analog output ch2 analog output ch1 analog output Non connection or connect to ground. Non connection or connect to ground. Minus power supply for analog (-6.0V Typ.) Zero-cross control input 1. Select one from four types of zero-cross modes including non-zerocross mode. When changing zero-cross modes during operation, set the system so that it changes at 1 second or more after the rise of CSN signal. I Zero-cross control input 2. Select one from four types of zero-cross modes including non-zero39 ZCEN2 cross mode. When changing zero-cross modes during operation, set the system so that it changes at 1 second or more after the rise of CSN signal. I Chip select input 40 CSN I Serial data input 41 SDATAI I Serial clock input 42 SCLK 43 SDATAO OD Serial
output Serial data are outputted from this terminal when CSN pin is "L" level. This terminal becomes high-impedance state when CSN pin is "H". Since it is an open drain output pin, pull it up through a resistor to the power supply voltage (to be AVDD or less) of a device to be connected. Do not allow output current of 1.5mA or over. I Test terminal Non connection or connect to DGND terminal. 44 TE2 I Test terminal Non connection or connect to DGND terminal. 45 TE1 - Digital ground 46 DGND O Reference voltage output for digital For attaining stabilization, connect this terminal to 47 REF AVSS terminal through a capacitance of 10µF or higher (CREF). And please do not use this terminal output for the drive purpose of an external circuit. - Minus power supply for analog (-6.0V Typ.) 48 AVSS Note A: analog terminal, OD: Open drain output terminal, "L" level means VIL, "H" level means VIH. 3 No. Name 1 AVSS 2 AVDD 3 IN1 4 IN2 5 IN3 6 IN4 7 IN5 8 IN6 9 IN7 10 AVDD 11 AVSS 12 REF7B 13 REF7A 14 REF6B 15 REF6A 16 REF5B 17 REF5A 18 REF4A 19 REF4B 20 REF3A 21 REF3B 22 REF2A 23 REF2B 24 REF1A 25 REF1B 26 NC 27 NC 28 OUT7 29 OUT6 30 OUT5 31 OUT4 32 OUT3 33 OUT2 34 OUT1 35 NC 36 NC 37 AVSS 38 ZCEN1 I / O - - AI AI AI AI AI AI AI - - AI AI AI AI AI AI AI AI AI AI AI AI AI AI - - AO AO AO AO AO AO AO - - - I
YAC523
Internal block diagram
50k 0-95dB 0+31.5dB OPAmp 100
REF1B REF1A IN2
15k 0-95dB 0+31.5dB OPAmp 100
REF2B REF2A IN3
15k 0-95dB 0+31.5dB OPAmp 100
REF3B REF3A IN4
15k 0-95dB 0+31.5dB OPAmp 100
REF4B REF4A
Zero Crossing Detector
CH1, 2, 3, 4 Control
AVDD DGND REF AVSS
Zero Crossing Detector 56 CH5, 6, 7 Control
Control Register S / P Register
TE1 TE2 ZCEN2 ZCEN1 SDATAO(OpenDrain) SDATAI SCLK CSN
REF5A REF5B
15k OPAmp 0+31.5dB 0-95dB 100
IN5 REF6A REF6B
15k OPAmp 0+31.5dB 0-95dB 100
IN6 REF7A REF7B
15k OPAmp 0+31.5dB 0-95dB 100
YAC523
Description of functions
1Vrms 6.3Vrms 200Vrms
Residual noise produced by a configuration that adopts YAC523
1.2Vrms
YAC523
38Vrms
+16dB
Volume
PreAMP
MainAMP
-+16dB Volume + PreAMP MainAMP
YAC523
Digital functions Serial data interface Writing of volume control data into YAC523 is performed through a serial interface. SDATAI is a serial data input pin, SCLK is a clock input pin, and CSN is a chip select pin for writing the value of volume. The serial data that is inputted from SDATAI (MSB first) is taken into YAC523 at the rising edge of SCLK when CSN terminal is at "L" level. The serial data is latched at the rising edge of CSN, and volume value of each channel is set into the register. The present volume value is outputted from SDATAO pin as serial data. With this data, the control by using daisy chain connection and verification of the present volume value can be performed easily. Note that the register value after turning the power supply on is ALL"0" (muted state) and the interface is enabled after a predetermined period (tPUP) has elapsed. (Serial access is prohibited in tPUP period.) CSN SCLK SDATAI SDATAO
D155 D154 D153 D152 D151 D150 D17 D16 D15 D14 D13 D12 D11 D10
D055 D054 D053 D052 D051 D050
Assignment of volume control data
D55:48
Channel1
Volume
data D47:40
Channel2
Volume
data D39:32
Channel3
Volume
data D31:24
Channel4
Volume
data D23:16
Channel5
Volume
data D15:
Channel6
Volume
dataD155:0
volume
value
change. D
Channel7
Volume
dataD055:0
present
volume
value.
Daisy chain Since multiple YAC523 devices can be connected by using the daisy chain connection, systems with 8 channels or more can be attained. For example, by connecting the device with YAC526 (2ch digital volume) through daisy chain, 8.1ch system can be attained. By connecting SDATAO pin of YAC523 (or YAC526) to SDATAI pin of YAC526 (YAC523), YAC523 and YAC526 can be controlled simultaneously without need of a complex addressing. (It is also possible to connect multiple YAC523, or to connect the device with YAC520 through daisy chain.) The volume data is taken into S / P (serial / parallel) registers of each LSI by setting CSN pin to "L" for 8 clock period on all channels that are connected with daisy chain. And, by setting CSN pin to "H" after the elapse of 8 clock period on all channels, the data is written from S / P registers of all YAC523 (or YAC526) that are connected with daisy chain into the control registers simultaneously to change the volume value. Example: Assignment of volume control data when a combination of YAC523 and YAC526 (or YAC520) as described below is used.
Audio source
YAC526 or YAC520
SDATAO CSN SDATAI SCLK
YAC523
SDATAO CSN SDATAI SCLK
D71:64
YAC526
YAC520
Channel1
Volume
data D63:56
YAC526
YAC520
Channel2
Volume
data D55:48
YAC523
Channel1
Volume
data D47:40
YAC523
Channel2
Volume
data D39:32
YAC523
Channel3
Volume
data D31:24
YAC523
Channel4
Volume
data D23:16
YAC523
Channel5
Volume
data D15:
YAC523
Channel6
Volume
data D
YAC523
Channel7
Volume
Controller
CSN SCLK SDATAI 6
D71 D70 D69 D68 D67 D66 D7 D6 D5 D4 D3 D2 D1 D0
YAC523
Volume setting The relationship between input code and volume value is as shown in the following table. Input code
Gain or attenuate(dB)
MUTE +31.5
The input codes ALL"0" and ALL"1" are set for mute. Zero-cross mode YAC523 incorporates the zero-cross detection function to suppress audible noise when the volume is changed quickly. A mode is selected from the following four modes by setting ZCEN1 and 2 pins. ZCEN2:1 00 01 10 11 Normal Zero-cross mode A Zero-cross mode B Zero-cross mode C Mode Operation Zero-cross is not detected, and the volume value is changed immediately after the rising of CSN. Zero-cross is detected after the rising of CSN, or after tTM1 (20ms) passes, volume value is changed. Zero-cross is detected after the rising of CSN, or after tTM2 (10ms) passes, volume value is changed. When the next data is written within tTM1 (20ms) for zero-cross mode A, the changed is performed at the falling of CSN by using the volume value immediately before.
No zero-cross
CSN SDATAI Volume
value (Zero-cross mode
B) Volume
value (Zero-cross mode
-12dB -9dB -6dB -15dB(Last
value) -3dB 0dB 0dB
-15dB(Last
value)
-12dB
YAC523
Electrical
characteristics
5. DC characteristics Item High level input voltage Low level input voltage Low level output voltage Input leakage current Symbol VIH VIL VOL ILI Condition Min. 2.2 Typ. Max. 0.8 0.4 10 Unit V V V A
YAC523
tCSPH
VIH VIH
tCSVS SCLK
VIH VIL
tLTH tSDVS
VIH VIL
VIH VIL VIH VIL
SDATAI
tCSDH
SDATAO
MSB tSSD
Fig 1 Serial port timing
YAC523
Example of system configuration
When there is a fear that voltage exceeding the maximum rating is applied to the analog input pins (IN1 to IN7) of YAC523, connect diodes between AVDD and AVSS as shown below to prevent application of voltage exceeding the maximum rating to the input pins. Please make an analog domain and a digital domain into the ground side separated, respectively, and arrange YAC523 to an analog domain and the impedance to an AVSS pin should become small as much as possible. And please secure an area large enough, and a radiation noise should fully be stopped and an analog ground and a digital ground also make it. Control signals, such as serial interface, should wire a digital ground side collectively. In order to prevent interference with a control signal and an analog signal, be careful for an analog signal and a digital signal not to cross or not to adjoin.
Analog input terminal protection AVDD
IN1IN7
Since SDATAO is an open drain output pin, connect it to the power supply of the destination device connected through a resistor. SDATAI
YAC523 -6V 100µF 48 0.1µF +6V 100µF 0.1µF 0.1µF 1 2 3
2.2k 2.2k 2.2k 2.2k 2.2k 2.2k 2.2k
10µF 47 46 45 SDATAO 42 SCLK 41 SDATAI 40 CSN 39 ZCEN2 38 ZCEN1 37 AVSS 44 43
0.1µF
AVSS AVDD IN1 IN2 IN3 IN4 IN5 IN6 IN7 AVDD AVSS REF7B REF7A REF6B REF6A REF5B
NC NC OUT1 OUT2 OUT3
36 35 34 33 10µF 32 10µF 31 10µF 30 10µF 29 10µF 28 10µF 27 10µF 26 25
10k 10k 10k 10k 10k 10k 10k
10µF 10µF 10µF 10µF 10µF 10µF 10µF
YAC523
OUT4 OUT5 OUT6 OUT7 NC NC REF1B
REF4A REF4B
REF3A
REF3B
REF2A REF2B 23
REF5A
REF1A
0.1µF 0.1µF
YAC523
External dimensions of package
YAC523-VZ
C-PK48VP-0
P-0.65 TYP.
0.32 or 0.30
0 MIN. (STAND OFF)
1.70 MAX. () (Installation height)
0.15 TYP. or 0.17 TYP. (LEAD THICKNESS)
(UNIT) : mm(millimeters) The shape of the molded corner may slightly different from the shape in this diagram. The figure in the parenthesis ( ) should be used as a reference. Plastic body dimensions do not include burr of resin. UNIT: mm
YAC523
Note) The specifications of this product are subject to change without notice. Agency
Semiconductor Sales & Marketing Department
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