-60

-50

-40

-30

-20

-10

0

10

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Frequency (MHz)

Decimation Filter Response

Low Pass Filter

High Pass Filter

-0.1

-0.08

-0.06

-0.04

-0.02

0

0.02

0.04

0.06

0.08

0.1

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

Frequency (MHz)

Decimation Filter Response

Low Pass Filter

2

Low Latency Filter

ADC

Lowpass/

Highpass

selection

0, Fs/2

800 MSPS

400 MSPS

ADS5402

www.ti.com

SLAS936 – MARCH 2013

RECEIVE MODE: DECIMATION FILTER

Each channel has a digital filter in the data path as shown in Figure 38. The filter can be programmed as a low-

pass or a high-pass filter and the normalized frequency response of both filters is shown in Figure 39.

Figure 38.

The decimation filter response has a 0.1dB pass band ripple with approximately 41% pass-band bandwidth. The

stop-band attenuation is approximately 40dB.

Figure 39.

Copyright © 2013, Texas Instruments Incorporated

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