Final Electrical Specifications
LTC1096L/LTC1098L
Low Voltage, Micropower
Sampling 8-Bit Serial I/O
A/D Converters
December 1995
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTIO
Specified at 2.65V Minimum Supply
Maximum Supply Current: 80碌A(chǔ)
Auto Shutdown to 1nA
8-Pin SO Package
On-Chip Sample-and-Hold
Conversion Time: 32碌s
Sample Rates: 16.5ksps
I/O Compatible with SPI, MICROWIRE
TM
, etc.
APPLICATI
s
s
s
s
s
S
The LTC
廬
1096L/LTC1098L are 3V micropower, 8-bit suc-
cessive approximation sampling A/D converters. They
typically draw only 40碌A(chǔ) 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.
Battery-Operated Systems
Remote Data Acquisition
Isolated Data Acquisition
Battery Monitoring
Temperature Measurement
TYPICAL APPLICATI
10碌W, SO-8 Package, 8-Bit A/D Converter
Samples at 200Hz and Runs Off a 3V Battery
1碌F
3V
1000
SUPPLY CURRENT, I
CC
(碌A(chǔ))
100
ANALOG INPUT
0V TO 3V RANGE
1 CS/
V
CC
SHDN
2
+IN
CLK
LTC1096L
3
鈥揑N
D
OUT
4
GND
V
REF
8
7
6
5
SERIAL DATA LINK
MPU
SERIAL DATA LINK
(MICROWIRE AND
SPI COMPATIBLE)
10
1096/8 TA01
1
0.1
1
10
SAMPLE FREQUENCY (kHz)
100
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.
U
Supply Current vs Sample Rate
UO
UO
1
1
2
3
4
5
6
7
8
