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LTC1289BCJ

Description
数据采集系统(DAS) 12 b 25k 串行,并联 20-CDIP
Categorysemiconductor    ADC/DAC - professional data collection   
File Size668KB,28 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LTC1289BCJ Overview

数据采集系统(DAS) 12 b 25k 串行,并联 20-CDIP

LTC1289BCJ Parametric

Parameter NameAttribute value
category
MakerADI
series*
PackagePipe fittings
typeData Acquisition System (DAS)
Resolution (bits)12 b
Sample rate (per second)25k
Data interfaceserial, parallel
供电电压源Double ±
Voltage - Power supply3V
Operating temperature0°C ~ 70°C
Installation typeThrough hole
Package/casing20-CDIP(0.300",7.62mm)
Supplier device packaging20-CDIP
Number of channels8
Basic product numberLTC1289
LTC1289
3 Volt Single Chip 12-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
Variable Data Word Length
Power Shutdown
Built-In Sample-and-Hold
Direct 4-Wire Interface to Most MPU Serial Ports
and All MPU Parallel Ports
25kHz Maximum Throughput Rate
Available in 20-Lead PDIP and 20-Lead SW Packages
The LTC
®
1289 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
TM
switched ca-
pacitor technology to perform a 12-bit unipolar, or 11-bit
plus sign bipolar A/D conversion. 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. When the LTC1289 is idle it can be powered
down in applications where low power consumption is
desired.
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, 12 or 16 bits.
This allows easy interface to shift registers and a variety of
processors.
, 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.
APPLICATIO S
Minimum Guaranteed Supply Voltage: 2.7V
Resolution: 12 Bits
Fast Conversion Time: 26µs Max Over Temp
Low Supply Currents: 1.0mA
TYPICAL APPLICATIO
+3V
Single Cell 3V 12-Bit Data Acquisition System
CH0
1N4148
CH1
CH2
CH3
10µF
–3V
FOR OVERVOLTAGE PROTECTION ON
ONLY ONE CHANNEL LIMIT THE INPUT
CURRENT TO 15mA. FOR MORE THAN
ONE CHANNEL LIMIT THE INPUT
CURRENT TO 7mA PER CHANNEL AND
28mA FOR ALL CHANNELS.
CONVERSION RESULTS ARE NOT VALID
WHEN THE SELECTED OR ANY OTHER
CHANNEL IS OVERVOLTAGED (V
IN
< V
or V
IN
> V
CC
).
V
CC
ACLK
SCLK
D
IN
TO AND
FROM
MPU
+
1/4 LTC1079
22µF
TANTALUM
10k
BOOST
V
+
OSC
LTC1044
LV
10Ω
+
CH4 LTC1289 D
OUT
CH5
CS
CH6
CH7
COM
DGND
REF
+
REF
V
AGND
1N4148
+
22µF
LT1004-1.2
0.1µF
1N5817
LTC1289 TA01
+
U
3V
LITHIUM
U
U
+
10µF
CAP
+
GND
CAP
V
OUT
–3V
22µF
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