LTC1096/LTC1096L
m LTC1098/LTC1098L
U.co Micropower Sampling
t4 8-Bit Serial I/O A/D Converters
taSheeFEATURES
.Das 80µA Maximum Supply Current
s 1nA Typical Supply Current in Shutdown
ws 8-Pin SO Plastic Package
wws 5V Operation (LTC1096/LTC1098)
s 3V Operation (LTC1096L/LTC1098L)(2.65V Min)
ms Sample-and-Hold
os 16µs Conversion Time
.cs 33kHz Sample Rate
s ±0.5LSB Total Unadjusted Error Over Temp
s Direct 3-Wire Interface to Most MPU Serial Ports and
UAll MPU Parallel I/O Ports
t4APPLICATI S
es Battery-Operated Systems
es Remote Data Acquisition
hs Battery Monitoring
s Battery Gas Gauges
Ss Temperature Measurement
tas Isolated Data Acquisition
, LTC and LT are registered trademarks of Linear Technology Corporation.
DESCRIPTIO
The LTC®1096/LTC1096L/LTC1098/LTC1098L are
micropower, 8-bit A/D converters that draw only 80µA of
supply current when converting. They automatically power
down to 1nA typical supply current whenever they are not
performing conversions. They are packaged in 8-pin SO
packages and have both 3V (L) and 5V versions. These
8-bit, switched-capacitor, successive approximation ADCs
include sample-and-hold. The LTC1096/LTC1096L have a
single differential analog input. The LTC1098/LTC1098L
offer a software selectable 2-channel MUX.
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.
These 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
(below 1V full scale) allow direct connection to sensors
and transducers in many applications, eliminating the
need for gain stages.
.DaTYPICAL APPLICATI
w10µW, S8 Package, 8-Bit A/D
Samples at 200Hz and Runs Off a 5V Battery
w 1µF 5V
w et4U.comANALOG INPUT
www.DataShe 10V TO 5V RANGE
CS/
SHUTDOWN
VCC
+IN CLK
LTC1096
–IN DOUT
GND VREF
MPU
(e.g., 8051)
P1.4
P1.3
P1.2
LTC1096/8 • TA01
Supply Current vs Sample Rate
1000
TA = 25°C
VCC = VREF = 5V
100
10
1
0.1
1 10 100
SAMPLE FREQUENCY, fSMPL (kHz)
LTC1096/98 • TPC03
