Final Electrical Specifications
LTC1096L/LTC1098L
Low Voltage, Micropower
Sampling 8-Bit Serial I/O
A/D Converters
December 1995
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DESCRIPTIO
EATURE
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F
The LTC®1096L/LTC1098L are 3V micropower, 8-bit suc-
cessive approximation sampling A/D converters. They
typically draw only 40µA of supply current when convert-
ing and automatically power down to a typical supply
currentof1nAbetweenconversions.Theyarepackagedin
8-pin SO packages and operate on a 3V supply. These 8-
bit, switched capacitor, successive approximation ADCs
include a sample-and-hold. The LTC1096L has a single
differential analog input. The LTC1098L offers a software
selectable 2-channel multiplexed input.
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Specified at 2.65V Minimum Supply
Maximum Supply Current: 80µA
Auto Shutdown to 1nA
8-Pin SO Package
On-Chip Sample-and-Hold
Conversion Time: 32µs
Sample Rates: 16.5ksps
I/O Compatible with SPI, MICROWIRETM, etc.
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PPLICATI
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On-chip serial ports allow efficient data transfer to a wide
rangeofmicroprocessorsandmicrocontrollersoverthree
wires.This,coupledwithmicropowerconsumption,makes
remote location possible and facilitates transmitting data
through isolation barriers.
Battery-Operated Systems
Remote Data Acquisition
Isolated Data Acquisition
Battery Monitoring
Temperature Measurement
Thecircuitscanbeusedinratiometricapplicationsorwith
an external reference. The high impedance analog inputs
and the ability to operate with reduced spans (to 1V full
scale) allow direct connection to sensors and transducers
in many applications, eliminating the need for gain stages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
MICROWIRE is a registered trademark of National Semiconductor Corporation.
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TYPICAL APPLICATI
10µW, SO-8 Package, 8-Bit A/D Converter
Samples at 200Hz and Runs Off a 3V Battery
Supply Current vs Sample Rate
1000
1µF
3V
100
MPU
1
2
3
4
8
CS/
SHDN
+IN
V
CC
SERIAL DATA LINK
(MICROWIRE AND
SPI COMPATIBLE)
7
6
5
10
1
ANALOG INPUT
0V TO 3V RANGE
CLK
LTC1096L
–IN
D
OUT
SERIAL DATA LINK
GND
V
REF
1096/8 TA01
0.1
1
10
100
SAMPLE FREQUENCY (kHz)
1096/8 TA02
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.
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