CS5531 datasheet(5/50 Pages) CIRRUS

Nome de Peças	CS5531

Descrição Electrónicos	16-bit and 24-bit ADCs with Ultra-low-noise PGIA

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Fabricante Electrônico	CIRRUS [Cirrus Logic]

Página de início	http://www.cirrus.com

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CS5531/32/33/34-AS

DS289F5

5

ANALOG CHARACTERISTICS (Continued)

(See Notes 1 and 2.)

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.

7. Input current on AIN+ or AIN- (with Gain = 1), or VREF+ or VREF- may increase to 250 nA if operated

within 50 mV of VA+ or VA-. This is due to the rough charge buffer being saturated under these

conditions.

Parameter

Min

Typ

Max

Unit

Analog Input

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

Gain = 1

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

(Note 5)

VA-

VA- + 0.7

-

VA+

VA+ - 1.7

V

CVF Current on AIN+ or AIN-

Gain = 1

(Note 6, 7)

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

-

50

1200

-

nA

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

50, 60 Hz

-

90

130

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, 7)

-

50

-

nA

Common Mode Rejection

dc

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

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