LINEAR TECHNOLOGY - LT1678 LT1679 Data Sheet User Manual
Summary
These dual/quad precision operational amplifiers deliver exceptional performance for demanding analog signal processing applications. Featuring rail-to-rail input/output, ultra-low noise (3.9nV/√Hz), and reliable single supply operation from 2.7V to 36V, these op amps maintain high accuracy even in portable or miniaturized systems. The accompanying manual provides comprehensive electrical characteristics, absolute maximum ratings, and typical configurations, making them perfect for designers building sensitive instrumentation amplifiers, microvolt detection circuitry, and low-noise analog measurement equipment.
Page 1 Text Content
LT1678/LT1679
Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps
FEATURES DESCRIPTIO Rail-to-Rail Input and Output The LT®1678/LT1679 are dual/quad rail-to-rail op amps 100% Tested Low Voltage Noise: offering both low noise and precision: 3.9n V/√Hz wideband 3.9n V/√Hz Typ at 1k Hz noise, 1/f corner frequency of 4Hz and 90n V peak-to-peak 5.5n V/√Hz Max at 1k Hz 0.1Hz to 10Hz noise are combined with outstanding Single Supply Operation from 2.7V to 36V precision: 100µV maximum offset voltage, greater than Offset Voltage: 100µV Max 100d B common mode and power supply rejection and Low Input Bias Current: 20n A Max 20MHz gain bandwidth product. The LT1678/LT1679 bring High AVOL: 3V/µV Min, RL = 10k precision as well as low noise to single supply applications as High CMRR: 100d B Min low as 3V. The input range exceeds the power supply by High PSRR: 106d B Min 100m V with no phase inversion while the output can swing Gain Bandwidth Product: 20MHz to within 170m V of either rail. Operating Temperature Range: –40°C to 85°C
The LT1678/LT1679 are offered in the SO-8 and SO-14
Matching Specifications
packages. A full set of matching specifications are also
No Phase Inversion
provided, facilitating their use in matching dependent appli-
8-Lead SO and 14-Lead SO Packages
cations such as a two op amp instrumentation amplifier design. The LT1678/LT1679 are specified for supply volt-
APPLICATIO S
ages of ±15V, single 5V as well as single 3V. For a single
Strain Gauge Amplifiers VO LT AG NO IS (5 0n V/ DI V)
amplifier with similiar performance, see the LT1677 data
Portable Microphones
sheet.
Battery-Powered Rail-to-Rail Instrumentation
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Noise Signal Processing Microvolt Accuracy Threshold Detection Infrared Detectors
TYPICAL APPLICATIO
Instrumentation Amplifier with Shield Driver
0.1Hz to 10Hz Voltage Noise+
LT1679 VS = ±2.5V
GUARD
RG 100Ω OUTPUT1/4
LT1679
RG 30k
–INPUT LT1679
GUARD
GAIN = 1000
3.4k TIME (sec)
1/4 16789 TA01
16789 TA01b
LT1679
sn16789 16789fs
Page Summary Contents For LINEAR TECHNOLOGY - LT1678 LT1679 Data Sheet User Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 16 |
| File Size | 288.45 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What are the operating temperature limits for the LT1678/LT1679?
The standard operating temperature range is –40°C to 85°C.
Does this op-amp support single supply voltage operation?
Yes, it supports single supply operation from 2.7V to 36V.
What are the input specifications for this device?
The differential input current is specified up to ±25mA.
How low can I use this amplifier in terms of voltage noise?
It provides a typical voltage noise of 3.9nV/√Hz wideband, or 0.1Hz to 10Hz at some applications.