ADC

SENSOR

INPUT

NETWORK

FEEDBACK

NETWORK

V

-

V

+

SENSOR

INPUT

NETWORK

FEEDBACK

NETWORK

V

-

ADC

(a)

(b)

C

V

+

LMP7731

www.ti.com

SNOSAT6E – JULY 2007 – REVISED MARCH 2013

ADC's sampling capacitor. Since this large capacitor will be loading the output of the amplifier as well, an

separates the additional load capacitance from the output of the amplifier and will also form a low-pass filter and

reduces signal swing since there is some voltage drop across it.

Figure 49 (a) shows the ADC directly connected to the amplifier. To minimize the glitch in this setting, a slower

Figure 49. Driving an ADC

Copyright © 2007–2013, Texas Instruments Incorporated

Submit Documentation Feedback

17

Product Folder Links: LMP7731