LTC1096L Datasheet, PDF (1/8 Pages) Linear Technology – Low Voltage, Micropower Sampling 8-Bit Serial I/O A/D Converters

FEATURES
s _{Specified at 2.65V Minimum Supply}
s _{Maximum Supply Current: 80µA}
s _{Auto Shutdown to 1nA}
s _{8-Pin SO Package}
s _{On-Chip Sample-and-Hold}
s _{Conversion Time: 32µs}
s _{Sample Rates: 16.5ksps}
s _{I/O Compatible with SPI, MICROWIRE}^TM_{, etc.}
APPLICATI S
s _{Battery-Operated Systems}
s _{Remote Data Acquisition}
s _{Isolated Data Acquisition}
s _{Battery Monitoring}
s _{Temperature Measurement}
Final Electrical Specifications
LTC1096L/LTC1098L
Low Voltage, Micropower
Sampling 8-Bit Serial I/O
A/D Converters
December 1995
DESCRIPTIO
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
current of 1nA between conversions. They are packaged in
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.
On-chip serial ports allow efficient data transfer to a wide
range of microprocessors and microcontrollers over three
wires. This, coupled with micropower consumption, makes
remote location possible and facilitates transmitting data
through isolation barriers.
The circuits can be used in ratiometric applications or with
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.
TYPICAL APPLICATI
10µW, SO-8 Package, 8-Bit A/D Converter
Samples at 200Hz and Runs Off a 3V Battery
1µF
3V
ANALOG INPUT
0V TO 3V RANGE
1 _CS/
2
SHDN
+IN
8
V_CC
7
CLK
3
–IN
LTC1096L
D_OUT
6
4 _GND
5
V_REF
MPU
SERIAL DATA LINK
SERIAL DATA LINK
(MICROWIRE AND
SPI COMPATIBLE)
1096/8 TA01
Supply Current vs Sample Rate
1000
100
10
1
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-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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