LTC6911C-1 View Datasheet(PDF) - Linear Technology

Part Name

Description

MFG CO.

LTC6911C-1

Dual Matched Amplifiers with Digitally Programmable Gain in MSOP

Linear Technology 

LTC6911-1/LTC6911-2

TYPICAL APPLICATIO

Expanding an ADC’s Dynamic Range

Figure 5 shows a compact 2-channel data acquisition

system for wide ranging input levels. This figure combines

an LTC6911-X programmable amplifier (10-lead MSOP)

with an LTC1865 analog-to-digital converter (ADC) in an

8-lead MSOP. This ADC has 16-bit resolution and a

maximum sampling rate of 250ksps. An LTC6911-1, for

example, expands the ADC’s input amplitude range by

40dB while operating from the same single 5V supply. The

499Ω resistor and 270pF capacitor couple cleanly be-

tween the LTC6911-X’s output and the switched-capacitor

inputs of the LTC1865.

V+

0.1µF

7

9

AGND

1

VINA

≥1µF

2

LTC6911-X

10 499Ω

270pF

3

VINB

8

499Ω

270pF

4

5

6

GAIN CONTROL

691112 F05

V+

0.1µF

VCC CONV

CH0

SCK

LTC1865

SDO

CH1

GND SDI

691112 F05

ADC INTERFACE

Figure 5. Expanding a Dual Channel ADC’s Dynamic Range

18

sn691112 691112fs

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