CS5531 查看數據表（PDF） - Cirrus Logic

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CS5531

16-Bit and 24-Bit ADCs with Ultra Low Noise PGIA

Cirrus Logic 

CS5531/32/33/34

ANALOG CHARACTERISTICS (Continued) (See Notes 1 and 2.)

Parameter

Min Typ

Max

Unit

Analog Input

Common Mode + Signal on AIN+ or AIN-Bipolar/Unipolar Mode

Gain = 1

VA-

-

VA+

V

Gain = 2, 4, 8, 16, 32, 64 (Note 5) VA- + 0.7 - VA+ - 1.7 V

CVF Current on AIN+ or AIN-

Gain = 1

(Note 6) -

500

-

nA

Gain = 2, 4, 8, 16, 32, 64

-

500

-

pA

Input Current Noise

Gain = 1

Gain = 2, 4, 8, 16, 32, 64

-

200

-

1

-

pA/√Hz

-

pA/√Hz

Input Leakage for Mux when Off (at 25 °C)

-

10

-

pA

Off-Channel Mux Isolation

-

120

-

dB

Open Circuit Detect Current

100 300

-

nA

Common Mode Rejection

dc, Gain = 1

dc, Gain = 64

-

90

-

dB

-

130

-

dB

50, 60 Hz

-

120

-

dB

Input Capacitance

-

60

-

pF

Guard Drive Output

-

20

-

µA

Voltage Reference Input

Range

(VREF+) - (VREF-)

1

2.5 (VA+)-(VA-) V

CVF Current

(Note 6) -

500

-

nA

Common Mode Rejection

dc

-

120

-

dB

50, 60 Hz

-

120

-

dB

Input Capacitance

11

-

22

pF

System Calibration Specifications

Full Scale Calibration Range

Bipolar/Unipolar Mode

3

-

110

%FS

Offset Calibration Range

Bipolar Mode

-100

-

100

%FS

Offset Calibration Range

Unipolar Mode

-90

-

90

%FS

Notes: 5. The voltage on the analog inputs is amplified by the PGIA, and becomes VCM ± Gain*(AIN+ - AIN-)/2 at

the differential outputs of the amplifier. In addition to the input common mode + signal requirements for

the analog input pins, the differential outputs of the amplifier must remain between (VA- + 0.1 V) and

(VA+ - 0.1 V) to avoid saturation of the output stage.

6. See the section of the data sheet which discusses input models.

6

DS289PP5

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