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LTC1283_15

Description
3V Single Chip 10-Bit Data Acquisition System
File Size337KB,24 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet View All

LTC1283_15 Overview

3V Single Chip 10-Bit Data Acquisition System

LTC1283
3V Single Chip 10-Bit Data
Acquisition System
FEATURES
DESCRIPTIO
Single Supply 3.3V or
±3.3V
Operation
Software Programmable Features:
Unipolar/Bipolar Conversions
4 Differential/8 Single-Ended Inputs
MSB- or LSB-First Data Sequence
Variable Data Word Length
Built-In Sample-and-Hold
Direct 4-Wire Interface to Most MPU Serial Ports
and all MPU Parallel Ports
15kHz Maximum Throughput Rate
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.
KEY SPECIFICATIO S
Minimum Guaranteed Supply Voltage: 3V
Resolution: 10 Bits
Offset Error:
±0.5LSB
Max
Linearity Error:
±0.5LSB
Max
Gain Error (LTC1283A):
±1LSB
Max
Conversion Time: 44μs
Supply Current: 350μA Max, 150μA Typ
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
LTCMOS is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATI
4.7μF
3V
LTC1283
DIFFERENTIAL
INPUT
3V
BIPOLAR
INPUT
–3V
3V
D
OUT
D
IN
SCLK
T
UNIPOLAR
INPUTS
CS
FOR 83CL410 CODE SEE
APPLICATIONS INFORMATION SECTION
MPU
(e.g., 83CL410)
1.0
0.5
ERROR (LSBs)
0
P1.1
P1.2
P1.3
P1.4
SERIAL DATA LINK
–0.5
– 1.0
0
(+)
(–)
–UNIPOLAR
INPUT
LTC1283 • TA01
–3V
U
Linearity Plot
512
OUTPUT CODE
LTC1283 • TA02
UO
U
1024
1283fb
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