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LTC1289BCSW

Description
3 Volt Single Chip 12-Bit Data Acquisition System
CategoryAnalog mixed-signal IC    converter   
File Size643KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC1289BCSW Overview

3 Volt Single Chip 12-Bit Data Acquisition System

LTC1289BCSW Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP, SOP20,.4
Contacts20
Manufacturer packaging codeSW
Reach Compliance Codecompli
ECCN codeEAR99
Maximum analog input voltage3.05 V
Minimum analog input voltage-3.05 V
Maximum conversion time26 µs
Converter typeADC, SUCCESSIVE APPROXIMATION
JESD-30 codeR-PDSO-G20
JESD-609 codee0
length12.8 mm
Maximum linear error (EL)0.0122%
Humidity sensitivity level1
Nominal negative supply voltage-3 V
Number of analog input channels8
Number of digits12
Number of functions1
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Output bit code2\'S COMPLEMENT BINARY
Output formatSERIAL
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP20,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)255
power supply3/+-3 V
Certification statusNot Qualified
Sampling rate0.025 MHz
Sample and hold/Track and holdSAMPLE
Maximum seat height2.65 mm
Nominal supply voltage3 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width7.5 mm
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
1289fb
1

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