Datasheet > LTC1853

LTC1853

更新时间： 2023-12-20 18:44:11

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	239K
描述
8 通道、12 位、400ksps、低功率、采样 ADC

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LTC1853 数据手册

LTC1852/LTC1853

8-Channel, 10-Bit/12-Bit,

400ksps, Low Power, Sampling ADCs

FEATURES

DESCRIPTION

The 10-bit LTC^®1852 and 12-bit LTC1853 are complete

8-channeldataacquisitionsystems.Theyincludeaﬂexible

8-channel multiplexer, a 400ksps successive approxima-

tionanalog-to-digitalconverter,aninternalreferenceanda

paralleloutputinterface.Themultiplexercanbeconﬁgured

forsingle-endedordifferentialinputs,twogainrangesand

unipolar or bipolar operation. The ADCs have a scan mode

thatwillrepeatedlycyclethroughall8multiplexerchannels

and can also be programmed to sequence through up to

16 addresses and conﬁgurations. The sequence can also

be read back from internal memory.

Flexible 8-Channel Multiplexer

Single-Ended or Differential Inputs

Two Gain Ranges

Unipolar or Bipolar Operation

Scan Mode and Programmable Sequencer

Eliminate Conﬁguration Software Overhead

Low Power: 3mW at 250ksps

2.7V to 5.5V Supply Range

Internal or External Reference Operation

Parallel Output Includes MUX Address

Nap and Sleep Shutdown Modes

Pin Compatible up-grade 1.25Msps 10-Bit LTC1850

and 12-Bit LTC1851

The reference and buffer ampliﬁer provide pin strappable

ranges of 4.096V, 2.5V and 2.048V. The parallel output

includes the 10-bit or 12-bit conversion result plus the

4-bit multiplexer address. The digital outputs are pow-

ered from a separate supply allowing for easy interface

to 3V digital logic. Typical power consumption is 10mW

at 400ksps from a single 5V supply and 3mW at 250ksps

from a single 3V supply.

APPLICATIONS

High Speed Data Acquisition

Test and Measurement

Imaging Systems

Telecommunications

Industrial Process Control

Spectrum Analysis

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

BLOCK DIAGRAM

LTC1853

SHDN

CONVST

DIFF

UNI/BIP

PGA

CH0

CH1

Integral Linearity

CONTROL LOGIC

CH2

AND

1.0

0.5

PROGRAMMABLE

SEQUENCER

CH3

CH4

CH5

CH6

CH7

COM

8-CHANNEL

INTERNAL

CLOCK

MULTIPLEXER

BUSY

DIFF /S6

OUT

A2 /S5

OUT

A1 /S4

OUT

A0 /S3

OUT

D11/S2

D10/S1

D9/S0

–0.5

–1.0

2.5V

REFERENCE

12-BIT

SAMPLING

ADC

–

DATA

LATCHES

REFOUT

OUTPUT

DRIVERS

512 1024 1536 2048 2560 3072 3584 4096

REFIN

REF AMP

CODE

1852 F01

REFCOMP

OGND

18523 BD

18523fa

12 3 4 5 6 7...24

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