AK4520A Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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AK4520A

100dB 20Bit Stereo ∆Σ ADC & DAC

Asahi Kasei Microdevices 

ASAHI KASEI

[AK4520A]

ANALOG CHARACTERISTICS

(Ta=25°C; VA,VD=5.0V; AGND=DGND=0V; VREFH=VA; VREFL=AGND; fs=44.1kHz; SCLK=64fs,

Signal Frequency=1kHz; 20bit Data; Measurement frequency=10Hz∼20kHz; unless otherwise specified)

Parameter

min

typ

max

Units

ADC Analog Input Characteristics: Differential Inputs; Analog Source Impedance=470Ω

Resolution

20

Bits

S/(N+D) (-0.5dB Input)

VA=3V

80

86

dB

(Note 3 ) VA=5V

84

90

dB

DR (-60dB Input, A-Weighted)

VA=3V

90

96

dB

(Note 4 ) VA=5V

94

100

dB

S/N

(A-Weighted)

VA=3V

90

96

dB

(Note 4 ,5 ) VA=5V

94

100

dB

Interchannel Isolation

90

110

dB

Interchannel Gain Mismatch

0.1

0.3

dB

Gain Drift

20

ppm/°C

Input Voltage

VA=3V

1.7

1.8

1.9

Vpp

AIN=0.6x(VREFH-VREFL)

VA=5V

2.85

3.0

3.15

Vpp

Input Resistance

20

30

kΩ

Power Supply Rejection

(Note 6 )

50

dB

DAC Analog Output Characteristics:

Resolution

20

Bits

S/(N+D)

VA=3V

84

90

dB

VA=5V

80

90

dB

DR (-60dB Output, A-Weighted)

VA=3V

92

96

dB

(Note 4 ) VA=5V

96

100

dB

S/N

(A-Weighted)

VA=3V

92

96

dB

(Note 7,5 ) VA=5V

96

100

dB

Interchannel Isolation

90

110

dB

Interchannel Gain Mismatch

0.1

0.3

dB

Gain Drift

20

ppm/°C

Output Voltage

VA=3V

1.76

1.88

1.99

Vpp

AOUT=0.626x(VREFH-VREFL)

VA=5V

2.94

3.13

3.32

Vpp

Load Resistance

10

kΩ

Load Capacitance

25

pF

Power Supply Rejection

(Note 6 )

50

dB

Note: 3 . In case of single ended input, S/(N+D)=84dB(typ, @VA=5V).

4 . In case of 16bit, DR and S/N of ADC are 98dB. DR of DAC is 98dB.

5 . S/N measured by CCIR-ARM is 96dB at each converter and 94dB at ADC to DAC loopback.

6 . PSR is applied to VA,VD with 1kHz, 50mVpp. VREFH/VREFL pin is held a constant voltage.

7 . As the input data is "0", S/N is 100dB regardless of resolution.

0163-E-00

-5-

1997/3

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