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LT1635
Micropower Rail-to-Rail
Op Amp and Reference
■
Guaranteed Operation at 1.2V
■
Op Amp and Reference on Single Chip
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Micropower: 130
µ
A Supply Current
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Industrial Temperature Range SO-8 Packages
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Rail-to-Rail Output
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High Output Current: 20mA Min
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Output Drives 1000pF
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Capable of Floating Mode Operation
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Specified for 5V and ±5V Supplies
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Low Reference Drift: 30ppm/°C
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Industry Standard LM10 Pinout
The LT
®
1635 is a new analog building block that includes a
rail-to-rail output op amp, a precision reference and reference
buffer. The device operates from supplies as low as a single
1.2V or up to ±5V, yet it consumes only 130µA of supply
current.
The input common mode range of the op amp includes
ground and incorporates phase reversal protection to pre-
vent false outputs from occurring when the input is below
the negative supply. The rail-to-rail output stage can swing to
within 15mV of each rail with no load and can swing to within
250mV of each rail while delivering 10mA of output current.
The gain bandwidth of the op amp is 175kHz and it is unity-
gain stable with up to 1000pF load capacitance.
The 0.2V reference is referred to V
–
and includes a buffer
amplifier to enhance flexibility. The reference and buffer
combine to achieve a drift of 30ppm/°C, a line regulation of
20ppm/V and a load regulation of 150ppm/mA.
The LT1635 is available in 8-pin PDIP and SO packages, and
has the industry standard LM10 pinout.
–
+
LT1635
R1
100k
V
OUT
ADJ
V
OUT
0V TO 5V
R2
3.9k
R3
5k
C1
0.01µF
6
7
2
3
1
8
1635 TA01
4
V
IN
> 5.2V
INPUT OFFSET VOLTAGE (mV)
–1.0
PERCENT OF UNITS
15
20
25
0.6
1635 TA02
10
5
0
–0.6
–0.2
0.2
1.0
V
S
= 5V, 0V
T
A
= 25°C
, LTC and LT are registered trademarks of Linear Technology Corporation.
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Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
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Precision Current Regulators
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Precision Voltage Regulators
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Battery Level Indicator
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Thermocouple Transmitter
0V to 5V Regulator
Typical Distribution of Input Offset Voltage
FEATURES
DESCRIPTIO
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APPLICATIO S
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TYPICAL APPLICATIO
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