LTC1196/LTC1198
8-Bit, SO-8, 1Msps ADCs
with Auto-Shutdown Options
FEATURES
DESCRIPTION
The LTC®1196ꢀLTC1198 are 600ns, 8-bit AꢀD converters
with sampling rates up to 1MHz. They are offered in 8-pin
SO packages and operate on 3V to 6V supplies. Power
dissipation is only 10mW with a 3V supply or 50mW with
a 5V supply. The LTC1198 automatically powers down to a
typicalsupplycurrentof1nAwheneveritisnotperforming
conversions. These 8-bit switched-capacitor successive
approximation ADCs include sample-and-holds. The
LTC1196 has a differential analog input; the LTC1198 of-
fers a software selectable /-channel MUX.
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High Sampling Rates: 1MHz (LTC1196)
750kHz (LTC1198)
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Low Cost
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Single Supply 3V and 5V Specifications
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Low Power: 10mW at 3V Supply
50mW at 5V Supply
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Auto-Shutdown: 1nA Typical (LTC1198)
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1ꢀ/LSB Total Unadjusted Error over Temperature
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3-Wire Serial IꢀO
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1V to 5V Input Span Range (LTC1196)
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Converts 1MHz Inputs to 7 Effective Bits
The 3-wire serial IꢀO, SO-8 packages, 3V operation and
extremely high sample rate-to-power ratio make these
ADCs an ideal choice for compact, high speed systems.
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Differential Inputs (LTC1196)
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/-Channel MUX (LTC1198)
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SO-8 Plastic Package
These ADCs can be used in ratiometric applications or
with external references. The high impedance analog in-
puts and the ability to operate with reduced spans below
1V full scale (LTC1196) allow direct connection to signal
sources in many applications, eliminating the need for
gain stages.
APPLICATIONS
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High Speed Data Acquisition
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Disk Drives
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Portable or Compact Instrumentation
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Low Power or Battery-Operated Systems
The A grade devices are specified with total unadjusted
error of 1ꢀ/LSB maximum over temperature.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Single 5V Supply, 1Msps, 8-Bit Sampling ADC
Effective Bits and S/(N + D) vs Input Frequency
8
7
6
5
4
3
/
1
0
50
1μF
5V
V
= V = /.7V
CC
REF
44
f
f
= 383kHz (LTC1196)
= /87kHz (LTC1198)
SMPL
SMPL
V
= V = 5V
CC
REF
f
= 1MHz (LTC1196)
SMPL
1
/
3
4
8
7
6
5
f
= 750kHz (LTC1198)
CS
V
SMPL
CC
SERIAL DATA LINK TO
ASIC, PLD, MPU, DSP,
OR SHIFT REGISTERS
+IN
–IN
GND
CLK
ANALOG INPUT
0V TO 5V RANGE
LTC1196
D
OUT
V
REF
1196ꢀ98 TA01
T
= /5°C
A
1k
10k
100k
1M
INPUT FREQUENCY (Hz)
1196ꢀ98 G/4
119698fa
1