LINEAR LT1635 Data Sheet
Summary
The LT1635 is a high-precision analog building block that integrates a rail-to-rail output op amp and a precision reference voltage onto a single chip. Designed for ultra-low power consumption (<130μA), it excels in portable instrumentation, sensor conditioning, and battery/solar-powered applications requiring stable regulation. This manual provides comprehensive electrical characteristics, application guidelines, and detailed specifications necessary for engineers designing reliable, high-accuracy circuits from low voltage supplies (down to 1.2V).
Page 1 Text Content
LT1635
Micropower Rail-to-Rail Op Amp and Reference
FEATURES DESCRIPTION
Guaranteed Operation at 1.2V The LT®1635 is a new analog building block that includes a Op Amp and Reference on Single Chip rail-to-rail output op amp, a precision reference and reference Micropower: 130µA Supply Current buffer. The device operates from supplies as low as a single Industrial Temperature Range SO-8 Packages 1.2V or up to ±5V, yet it consumes only 130µA of supply Rail-to-Rail Output current. High Output Current: 25m A Min
The input common mode range of the op amp includes
Output Drives 1000p F
ground and incorporates phase reversal protection to pre-
Capable of Floating Mode Operation
vent false outputs from occurring when the input is below
Specified for 5V and ±5V Supplies
the negative supply. The rail-to-rail output stage can swing to
Low Reference Drift: 30ppm/°C
within 15m V of each rail with no load and can swing to within
Industry Standard LM10 Pinout
250m V of each rail while delivering 10m A of output current. The gain bandwidth of the op amp is 175k Hz and it is unity- APPLICATIONS gain stable with up to 1000p F load capacitance.
PE RC EN OF NI TS
The 0.2V reference is referred to V– and includes a buffer
Battery- or Solar-Powered Systems
amplifier to enhance flexibility. The reference and buffer
Portable Instrumentation
combine to achieve a drift of 30ppm/°C, a line regulation of
Sensor Conditioning
20ppm/V and a load regulation of 150ppm/m A.
Precision Current Regulators Precision Voltage Regulators The LT1635 is available in 8-pin PDIP and SO packages, and Battery Level Indicator has the industry standard LM10 pinout.
Thermocouple Transmitter , LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
0V to 5V Regulator Typical Distribution of Input Offset Voltage C1
0.01µF VS = 5V, 0V TA = 25°C
VIN > 5.2V
LT1635
0V TO 5V
VOUT R3 –1.0 –0.6 –0.2 0.2 0.6 1.0 ADJ 5k
INPUT OFFSET VOLTAGE (m V)
1635 TA01
1635 TA02
Page Summary Contents For LINEAR LT1635 Data Sheet
Manual Details
| Brand | Linear |
|---|---|
| Pages | 12 |
| File Size | 306.95 KB |
| Published | May 30, 2026 |
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Frequently Asked Questions
What is the minimum supply voltage for operation?
The device supports operations from supplies as low as 1.2V.
How does the OP Amp perform with a load capacitance of 1000pF?
It remains unity-gain stable even with up to 1000pF load capacitance, and has a gain bandwidth of 175kHz.
Does the LT1635 feature protection against false outputs?
Yes, it incorporates phase reversal protection capable of preventing false outputs when the input is below the negative supply rail.
What is the reference drift characteristic at room temperature?
The reference has a low drift of 30ppm/°C within 15mV of each rail with no load.