Datasheet > LTC1287_1

LTC1287_1

更新时间： 2024-09-24 05:43:39

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
16页	316K
描述
3V Single Chip 12-Bit Data Acquisition System

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中文翻译

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LTC1287_1 数据手册

LTC1287

3V Single Chip 12-Bit

Data Acquisition System

FEATURES

DESCRIPTIO

The LTC^®1287 is a 3V data acquisition component which

contains a serial I/O successive approximation A/D con-

verter. The device specifications are guaranteed at a

supply voltage of 2.7V. It uses LTCMOS^TMswitched ca-

pacitor technology to perform a 12-bit unipolar, A/D

conversion. The differential input has an on-chip sample-

and-hold on the (+) input.

■

Single Supply 3.3V Operation

■

Built-In Sample-and-Hold

■

Direct 3-Wire Interface to Most MPU Serial Ports and

All MPU Parallel Ports

30kHz Maximum Throughput Rate

■

KEY SPECIFICATIO S

■

TheserialI/Oisdesignedtocommunicatewithoutexternal

hardware to most MPU serial ports and all MPU parallel

I/Oportsallowingdatatobetransmittedandreceivedover

three wires. The low voltage operating capability and the

low power consumption of this device make it ideally

suitedforbatteryapplications.Giventheeaseofuse,small

package size and the minimum number of interconnects

for I/O, the LTC1287 can be used for remote sensing

applications.

Minimum Guaranteed Supply Voltage: 2.7V

■

Resolution: 12 Bits

■

Fast Conversion Time: 24µs Max Over Temp.

■

Low Supply Current: 1.0mA

APPLICATIO S

■

Battery-Powered Instruments

Data Logger

Data Acquisition Modules

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

LTCMOS is a trademark of Linear Technology Corporation

■

TYPICAL APPLICATIO

3V Differential Input Data Acquisition System

22µF TANTALUM

INL with V_REF= 1.2V

1.0

LITHIUM

10k

DIFFERENTIAL INPUTS

COMMON MODE RANGE

CLK

+IN

–IN

GND

–

0.5

LTC1287

0V TO V

OUT

–0.5

–1.0

REF

LT1004-1.2

22µF

TANTALUM

TO AND FROM MPU

512 1024

1536 2048 2560 3072

CODE

3584 4096

FOR OVERVOLTAGE PROTECTION, LIMIT THE INPUT CURRENT TO 15mA

PER PIN OR CLAMP THE INPUTS TO V AND GND WITH 1N4148 DIODES.

LTC1287 TA02

CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED CHANNEL OR

OTHER CHANNEL IS OVERVOLTAGED (V < GND OR V > V ). SEE SECTION

ON OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION.

1287 TA01

1287fa

12 3 4 5 6 7...16

中文翻译

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