AK5351 데이터 시트보기 (PDF) - Asahi Kasei Microdevices

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AK5351

Enhanced Dual bit ∆Σ 20bit ADC

Asahi Kasei Microdevices 

ASAHI KASEI

[AK5351]

ANALOG CHARACTERISTICS

(Ta=25°C; VA,VD,VB=5.0V; fs=48kHz; 20bit; Input signal frequency=1kHz,

Measurement Bandwidth=10Hz~20kHz; unless otherwise specified.)

Parameter

min

typ

max

Units

Resolution

20

Bits

Analog Input Characteristics (Analog source impedance: 330Ω)

S/(N+D)

(Note 4 )

88

97

dB

Dynamic Range (A-weighted) (Note 5 )

97

103

dB

S/N

(A-weighted) (Note 6 )

97

103

dB

Interchannel Isolation

(f=1kHz)

100

120

dB

Interchannel Gain Mismatch

0.1

0.3

dB

Gain drift

±200

ppm/°C

Input Voltage Range

±1.97

±2.10

±2.23

Vp-p

Input Impedance

30

50

kΩ

Power Supplies

Power Supply Current (Note 7 )

Normal Operation (PD="H")

VA+VB

15

25

mA

VD

6

9

mA

Power-Down mode (PD="L")

VA+VB

20

uA

VD

10

uA

Power Consumption (Note 7 )

Normal Operation

105

170

mW

Power-Down mode

150

uW

Power Supply Rejection Ratio

50

dB

Note 4 : The ratio of the rms value of the signal to the sum of all other spectral components up to 20kHz

except for the signal (included harmonic component, excluded DC component, analog input

signal is -0.5dB). Inversed of THD+N.

Note 5 : S/(N+D) with an input signal of 60dB below full-scale.

Note 6 : When using only 20kHzLPF, S/N and DR are 99dB(typ.). When using CCIR-ARM filter,

S/N is 99dB(typ.)

Note 7 : Almost no current is supplied from VB pin.

0166-E-00

-6-

1997/4

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