[AK7742]

Rev.0.5b_PB

2008/08

-

(Ta=25ºC; AVDD=DVDD=3.3V; BICK=64fs; signal frequency 1kHz; Measurement bandwidth=20Hz~20kHz,

fs=48kHz, ADC differential input, CKM mode 0 (CKM[2:0]=000), unless otherwise specified)

Parameter

min

typ

max

Unit

Resolution

24

Bits

Dynamic characteristics

S/(N+D)

(-1dBFS)

(Note 4)

TDB

84

dB

Dynamic range (A-weighted)

(Note 4)

TDB

96

dB

S/N

(A-weighted)

(Note 4)

TDB

96

dB

Inter-channel isolation (f=1kHz) (Note 5)

90

105

dB

DC accuracy

Channel gain mismatch

0.1

0.3

dB

Analog input

Input voltage (differential input)

(Note 6)

±1.85

±2.00

±2.15

Vp-p

Input voltage (single-end input)

(Note 7)

1.85

2.00

2.15

Vp-p

Stereo

ADC

Input impedance

(Note 8)

41

62

kΩ

Note 4. This value is not guaranteed for single-ended inputs.

Note 5. Indicates isolation between L and R when -1dBFS signal is applied.

Note 6. Target input pins are AIN1LP, AIN1LN, AIN1RP, AIN1RN.

Note 7. Target input pins are AIN2L, AIN2R, AIN3L, AIN3R.

Note 8. Target input pins are AIN1LP, AIN1LN, AIN1RP, AIN1RN, AIN2L, AIN2R, AIN3L, AIN3R.

(Ta=25ºC; AVDD=DVDD=3.3V; BICK=64fs; signal frequency 1kHz; Measurement bandwidth=20Hz~20kHz,

fs=48kHz, ADC differential input, CKM mode 0 (CKM[2:0]=000), unless otherwise specified)

Parameter

min

typ

max

Unit

Resolution

24

Bits

Dynamic characteristics

S/(N+D)

(0dBFS)

TBD

92

dB

Dynamic range (A-weighted)

TBD

106

dB

S/N

(A-weighted)

TBD

106

dB

Inter-channel isolation (f=1kHz)(Note 9)

90

105

dB

DC accuracy

Channel gain mismatch

0.2

0.5

dB

Analog output

Output voltage (Note 10)

3.36

3.66

3.96

Vp-p

Load resistance

5

kΩ

Stereo

DAC

Load capacitance

30

pF

Note 9. Indicates isolation between each DAC’s of Lch and Rch when -1dBFS signal is applied.

Note 10. Full scale output voltage. The output voltage scales with AVDD.

ANALOG CHARACTERISTICS