CS5530 Просмотр технического описания (PDF) - Cirrus Logic

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CS5530

24-bit ADC with Ultra-low-noise Amplifier

Cirrus Logic 

CS5530

ANALOG CHARACTERISTICS (Continued)

(See Notes 1 and 2.)

CS5530-CS

Parameter

Min Typ Max Unit

Power Supplies

DC Power Supply Currents (Normal Mode)

IA+, IA-

ID+

-

6

8 mA

-

0.6 1.0 mA

Power Consumption

Normal Mode

Standby

Sleep

(Note 7) -

-

-

35 45 mW

5

- mW

500

-

µW

Power Supply Rejection

(Note 8)

DC Positive Supplies

-

DC Negative Supply

-

115

-

dB

115

-

dB

7. All outputs unloaded. All input CMOS levels.

8. Tested with 100 mV change on VA+ or VA-.

TYPICAL NOISE-FREE RESOLUTION (BITS) (See Notes 9 and 10)

Output Word Rate (Sps)

7.5

15

30

60

120

240

480

960

1,920

3,840

-3 dB Filter Frequency (Hz)

1.94

3.88

7.75

15.5

31

62

122

230

390

780

Noise-free Bits

19

19

18

18

17

16

16

15

15

13

Noise (nVrms)

17

24

34

48

68

115

163

229

344

1390

9. Noise Free Resolution listed is for Bipolar operation, and is calculated as LOG((Input Span)/(6.6xRMS

Noise))/LOG(2) rounded to the nearest bit. For Unipolar operation, the input span is 1/2 as large, so one

bit is lost. The input span is calculated in the analog input span section of the data sheet. The Noise

Free Resolution table is computed with a value of 1.0 in the gain register. Values other than 1.0 will

scale the noise, and change the Noise Free Resolution accordingly.

10. “Noise Free Resolution” is not the same as “Effective Resolution”. Effective Resolution is based on the

RMS noise value, while Noise Free Resolution is based on a peak-to-peak noise value specified as 6.6

times the RMS noise value. Effective Resolution is calculated as LOG((Input Span)/(RMS

Noise))/LOG(2).

Specifications are subject to change without notice.

6

DS742F3

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