AK7746 datasheet(8/62 Pages) AKM

Part #	AK7746

Description	Audio DSP with 5-channel 24-bit ADC and Input Mux

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Manufacturer	AKM [Asahi Kasei Microsystems]

Direct Link	http://www.akm.com

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8 / 62 page

[ASAHI KASEI]

[AK7746]

[MS0369-E00]

- 8 -

2004/12

Pin No

Pin name

I/O

Function

Classification

46

AVDD

- Analog Power supply pin 3.3V (typ)

47

AVSS

- Analog Ground 0.0V

Analog Power Supply

48

LFLT

O Filter connection pin for PLL

When using the PLL function, connect a 22k

Ω resistor and a 1.5nF capacitor

in series to the analog ground (AVSS)

Analog output

49

AINM

I ADCM Monaural single ended input

50

AINR4

I ADC1 or ADC2 Rch single ended input 4

51

AINL4

I ADC1 or ADC2 Lch single ended input 4

52

AINR3

I ADC1 or ADC2 Rch single ended input 3

53

AINL3

I ADC1 or ADC2 Lch single ended input 3

54

AINR2

I ADC1 or ADC2 Rch single ended input pin 2

55

AINL2

I ADC1 or ADC2 Lch single ended input pin 2

Analog input

56

AVDD

- Analog Power Supply 3.3V (typ)

Analog Power supply

57

VREFH

I

Analog reference voltage input

Normally, connect to AVDD, and connect 0.1

µF and 10µF capacitors

between this pin and AVSS.

Analog input

58

VCOM

O

Common voltage

Normally, connect 10

µF and 0.1µFcapacitor between this pin and AVSS.

Don’t connect to other circuitry.

Analog output

59

VREFL

I

Analog reference voltage input pin for low-level.

Normally, connect to AVSS.

Analog input

60

AVSS

- Analog Ground 0.0V

Analog Power Supply

61

AINR-

I ADC1 or ADC2 Rch analog inverted input

62

AINR+

I ADC1 or ADC2 Rch analog non-inverted input

63

AINL-

I ADC1 or ADC2 Lch analog inverted input

64

AINL+

I ADC1 or ADC2 Lch analog non-inverted

Analog input

Note) Do NOT leave open digital input pins unless they are internally pulled down and BITCLK_I, LRCLK_I in master mode.

(If you do not use pull-down pin, leave open or connects to DVSS. However, TESTI pin should connect to DVSS. )

* If analog input pins (1~8, 49~55, 61~64 pin ) are not used, leave them open.

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