CS5371A-ISZ(2006) 查看數據表（PDF） - Cirrus Logic

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CS5371A-ISZ
(Rev.:2006)

Low-power, High-performance ∆Σ Modulators

Cirrus Logic 

CS5371A CS5372A

age reference input impedance will vary with

MCLK.

The voltage reference external RC filter series

resistor creates a voltage divider with the

VREF input impedance to reduce the effective

applied input voltage. To minimize gain error

resulting from this voltage divider effect, the

RC filter series resistor should be the minimum

size recommended in the voltage reference

device data sheet.

7.5 VREF Accuracy

The nominal voltage reference input is speci-

fied as 2.500 V across the VREF± pins, and all

CS5371A and CS5372A gain accuracy speci-

fications are measured using a nominal volt-

age reference input. Any variation from a

nominal VREF input will proportionally vary the

analog full-scale gain accuracy.

Since temperature drift of the voltage refer-

ence results in gain drift of the analog full-scale

amplitude, care should be taken to minimize

temperature drift effects through careful selec-

tion of passive components and the voltage

reference device itself. Gain drift specifications

of the CS5371A and CS5372A do not include

the temperature drift effects of external pas-

sive components or of the voltage reference

device itself.

DS748F1

23

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