Datasheet

ADS62P45, ADS62P44

ADS62P43, ADS62P42

www.ti.com

SLAS561C –JULY 2007– REVISED FEBRUARY 2012

D2-D0 <DECIMATION RATE> Decimation filters

000 Decimate by 2 (pre-defined or user coefficients can be used)

001 Decimate by 4 (pre-defined or user coefficients can be used)

011 NO decimation (Pre-defined coefficients are disabled, only custom coefficients are available)

100 Decimate by 8 (Only custom coefficients are available)

D3 <ODD TAP ENABLE>

0 Even taps enabled (24 coefficients)

1 0 Odd taps enabled (23 coefficients)

D4 <FILTER ENABLE>

0 Digital filter bypassed

1 Digital filter enabled

D5 <FILTER COEFF SELECT>

0 Pre-defined coefficients are loaded in the filter

1 User-defined coefficients are loaded in the filter (coefficients have to be loaded in registers – to - )

D7 <OFFSET Enable>

0 Offset correction disabled

1 Offset correction enabled

Table 19.

A7–A0

D7 D6 D5 D4 D3 D2 D1 D0

(hex)

1D 0 0 0 0 0 0 <DECIMATION FILTER FREQ BANDS>

D1-D0 <DECIMATION FILTER FREQ BAND> Decimation filters

With decimate by 2, <DECIMATION RATE> = 000:

00 Low pass filter (–6 dB frequency at Fs/4)

01 High pass filter (–6 dB frequency at Fs/4)

10, 11 Unused

With decimate by 4, <DECIMATION RATE> = 001:

00 Low pass filter (-3 dB frequency at Fs/8)

01 Band pass filter (center frequency at 3Fs/16)

10 Band pass filter (center frequency at 5Fs/16)

11 High pass filter (-3 dB frequency at 3Fs/8)

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