AK7740ET Datasheet, PDF (6/48 Pages) Asahi Kasei Microsystems – 24bit 2ch ADC + 24bit 4ch DAC with Audio DSP

[ASAHI KASEI]
[AK7740ET]
Pin No.
20
21
22
23
24
25
26
27
28
Pin name
SDOUTA
SDOUT
DRDY
DVSS
DVDD
RDY
SO
SI
SCLK
I/O
Function
O DSP serial data output
Outputs MSB justified 24-bit data selected from ADC or SDOUTD1
by control register setting
O DSP serial data output
Outputs MSB justified 24-bit data
O Output data ready pin for microcontroller interface
- Digital ground
- Digital power supply 3.3V typical
O Data write ready output for microcontroller interface
O Serial data output for microcontroller interfaces
Microcontroller interface serial data input and serial data
I output control
When SI does not use, leave SI=”L”
Microcontroller interface serial data clock
I When SCLK is not used, leave SCLK=”H”
Classification
Digital section
Serial output data
Microcontroller
interface
Power supply
Microcontroller
interface
RQ
Microcontroller interface writes request pin.
29
I _{RQ =”L”: Microcontroller interface enable}
30
S_RESET
I System Reset
31 _{INIT_RESET} I Reset (for initialization)
Input “L” to initialize the AK7740 at power-on
32
DVDD
- Digital power supply 3.3V typical
33
DVSS
- Digital ground
34
BVSS
- Substrate ground
35
AOUTR2 O DAC2 Rch analog output
36
AOUTL2 O DAC2 Lch analog output
37
AOUTR1 O DAC1 Rch analog output
38
AOUTL1 O DAC1 Lch analog output
39
AVDD
- Analog power supply 3.3V typical
40
VCOM
O Common voltage
Connect to 0.1uF and 10uF capacitors between this pin and
AVSS. Do not connect to external circuitry
41
AVSS
- An alog ground
42
AINR-
I ADC Rch analog inverted input
43
AINR+
I ADC Rch analog non-inverted input
44
AINL-
I ADC Lch analog inverted input
45
AINL+
I ADC Lch analog non-inverted input
46
AINR4
I ADC single-ended analog Rch input 4
47
AINL4
I ADC single-ended analog Lch input 4
48
AINR3
I ADC single-ended analog Rch input 3
Reset
Power supply
Power supply
Analog section
Power supply
Analog section
Power supply
Analog section
<Pre-E-01>
-6-
2006/10