AD4134 datasheet(52/92 Pages) AD

52 / 92 page

Data Sheet

AD4134

DEVICE CONFIGURATION

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Rev. 0 | 52 of 92

PROGRAMMING DIGITAL FILTER

In pin control mode, four digital filter types are available through the

configuration of the FILTER1/GPIO5 pin and FILTER0/GPIO4 pin.

All four ADC channels share the same digital filter type.

One additional digital filter type, wideband 0.10825 × ODR filter, is

available only in SPI control mode. In SPI control mode, the digital

filter type can be configured independently for each ADC channel

via the DIGFILTER_SEL_CHx bits and the additional digital filter

type (wideband 0.10825 × ODR filter or wideband 0.433 × ODR

filter) via the WB_FILTER_ SEL_CHx bits, where x is the channel

number from 0 to 3. Table 31 lists all the digital filter options.

To configure the digital filter dynamically, change the digital filter

first and then change the output data rate to ensure proper opera-

tion.

Table 31. Digital Filter Configuration

FILTER1 or DIGFILTER_SEL_CHx, Bit 1

FILTER0 or DIGFILTER_SEL_CHx, Bit 0

WB_FILTER_SEL_CHx, Bit 0

Digital Filter Type

Wideband 0.433 × ODR filter

Wideband 0.10825 × ODR filter1

Sinc6

Sinc3

Sinc3 with additional 60 Hz rejection

1 Available in SPI control mode only.

2 X means don’t care.

AD4134 데이터시트(PDF) 52 Page - Analog Devices