LTC6912CGN1PBF Linear Technology Corporation, LTC6912CGN1PBF Datasheet

LTC6912CGN1PBF

Manufacturer Part Number

LTC6912CGN1PBF

Description

SSOP-16

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC6912CGN1PBF.pdf (24 pages)

Specifications of LTC6912CGN1PBF

Date_code

07+

Current page: 1 of 24
Download datasheet (409Kb)

FEATURES

TYPICAL APPLICATIO

■

APPLICATIO S

■

LTC6912-1: (0, 1, 2, 5, 10, 20, 50, and 100V/V)

LTC6912-2: (0, 1, 2, 4, 8, 16, 32, and 64V/V)

2 Channels with Independent Gain Control

Offset Voltage = 2mV Max (–40°C to 85°C)

Channel-to-Channel Gain Matching of 0.1dB Max

3-Wire SPI

Extended Gain-Bandwidth at High Gains

Wired-OR Outputs Possible (2:1 Analog MUX

Function)

Low Power Hardware Shutdown (GN-16 Only,

2µA Max at 2.7V)

Rail-to-Rail Input Range

Rail-to-Rail Output Swing

Single or Dual Supply: 2.7V to 10.5V Total

Input Noise: 12.6nV/√Hz

Total System Dynamic Range to 115dB

16-Pin GN (SSOP) or 12-Pin DFN Package Options

Data Acquisition Systems

Dynamic Gain Changing

Automatic Ranging Circuits

Automatic Gain Control

A Dual, Matched Low Noise PGA (16-Lead SSOP Package)

INTERFACE

3-WIRE

SPI

Interface

CS/LD

SHDN

DATA

CLK

1µF

INA

INB

INA

AGND

INB

SHDN

CS/LD

CHB

0.1µF

LTC6912-X

CHA

DGND

OUT

OUT A

OUT B

–

OUTA

OUTB

= GAIN

6912 TA01a

• V

INA

INB

DESCRIPTIO

The LTC

digitally programmable gain amplifiers (PGA) that are

easy to use and occupy very little PC board space. The

gains for both channels are independently programmable

using a 3-wire SPI interface to select voltage gains of 0, 1,

2, 5, 10, 20, 50, and 100V/V (LTC6912-1 ); and 0, 1, 2, 4,

8, 16, 32, and 64V/V (LTC6912-2). All gains are inverting.

The LTC6912 family consists of 2 matched amplifiers with

rail-to-rail outputs. When operated with unity gain, they

will also process rail-to-rail input signals. A half-supply

reference generated internally at the AGND pin supports

single power supply applications. Operating from single

or split supplies from 2.7V to 10.5V total, the LTC6912-X

family is offered in tiny SSOP and DFN-12 Packages.

All other trademarks are the property of their respective owners.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Serial Digital Interface

6912 is a family of dual channel, low noise,

Dual Programmable

Gain Amplifiers with

–10

0.1

GAIN OF 64

GAIN OF 32

GAIN OF 16

GAIN OF 8

GAIN OF 4

GAIN OF 2

GAIN OF 1

Frequency Response

FREQUENCY (kHz)

LTC6912-2

100

1000

= ±2.5V

= 10mV

10000

6912 TA01b

RMS

LTC6912

6912fa

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