LTC1283CS datasheet(1/24 Pages) LINER

Part #	LTC1283CS

Description	3V Single Chip 10-Bit Data Acquisition System

PDF	24 Pages

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC1283

3V Single Chip 10-Bit Data

Acquisition System

DESCRIPTIO

S

FEATURE

s

Single Supply 3.3V or

±3.3V Operation

s

Software Programmable Features:

Unipolar/Bipolar Conversions

4 Differential/8 Single-Ended Inputs

MSB- or LSB-First Data Sequence

Variable Data Word Length

s

Built-In Sample-and-Hold

s

Direct 4-Wire Interface to Most MPU Serial Ports

and all MPU Parallel Ports

s

15kHz Maximum Throughput Rate

APPLICATI

TYPICAL

Linearity Plot

KEY SPECIFICATIO S

s

Minimum Guaranteed Supply Voltage: 3V

s

Resolution: 10 Bits

s

Offset Error:

±0.5LSB Max

s

Linearity Error:

±0.5LSB Max

s

Gain Error (LTC1283A):

±1LSB Max

s

Conversion Time: 44

µs

s

Supply Current: 350

µA Max, 150µA Typ

OUTPUT CODE

0

0.5

1024

LTC1283 • TA02

–0.5

– 1.0

512

1.0

The LTC1283 is a 3V data acquisition component which

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

verter. It uses LTCMOS

TM switched capacitor technology

to perform either 10-bit unipolar, or 9-bit plus sign bipolar

A/D conversions. The 8-channel input multiplexer can be

configured for either single-ended or differential inputs (or

combinations thereof). An on-chip sample-and-hold is

included for all single-ended input channels.

The serial I/O is designed to be compatible with industry-

standard full-duplex serial interfaces. It allows either MSB-

or LSB-first data and automatically provides 2’s comple-

ment output coding in the bipolar mode. The output data

word can be programmed for a length of 8-, 10-, 12-, or

16-bit. This allows easy interface to shift registers and a

variety of processors.

Both the LTC1283A and LTC1283 are specified with offset

and linearity errors less than

±0.5LSB. The LTC1283A has

a gain error limit of

±1LSB. The 1283 is specified with a

gain error limit of

±2LSB for applications where gain is

adjustable or less critcial.

LTCMOS is a trademark of Linear Technology Corp.

DIFFERENTIAL

INPUT

LTC1283

3V

BIPOLAR

INPUT

–3V

3V

T

–3V

UNIPOLAR

INPUTS

(+)

(–)

–UNIPOLAR

INPUT

MPU

(e.g., 83CL410)

P1.1

P1.2

P1.3

P1.4

SERIAL DATA LINK

FOR 83CL410 CODE SEE

APPLICATIONS INFORMATION SECTION

LTC1283 • TA01

DOUT

DIN

SCLK

CS

4.7

µF

3V

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