LINEAR TECHNOLOGY LT1678 LT1679 User's Manual and Specifications
Summary
These low noise, rail-to-rail operational amplifiers are ultra-precision components designed for demanding signal processing environments. Offering stability in single supply operation (2.7V to 36V) and featuring exceptionally low voltage noise, they maintain high performance across varying temperatures and power inputs. The manual provides comprehensive electrical characteristics, including offset voltage and PSRR data, alongside application guidelines for instrumentation amplifiers, biosignal processing, and sensitive detection systems where microvolt accuracy is critical.
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 User's Manual and Specifications
Manual Details
| Brand | Linear |
|---|---|
| Pages | 16 |
| File Size | 287.90 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the recommended operating temperature range?
The specified operating temperature range for these op amps is –40°C to 85°C.
What types of power supplies can the LT1678/LT1679 handle?
They operate in single supply mode from 2.7V to 36V, and they are specified for ±15V, single 5V, and single 3V.
What is the typical noise performance at 1kHz?
The low voltage noise is typically listed as 3.9nV/√Hz wideband at 1kHz.
How does the device perform with negative input voltages?
The maximum offset voltage remains within specified limits even when external inputs go beyond either power rail.