Signal Conditioning Operational Amplifiers (Op Amps) Precision Amplifiers (Vos < 0.75mV)
Signal Conditioning Operational Amplifiers (Op Amps) Low Noise Amplifiers

LT1679 - Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps

Features

  • Rail-to-Rail Input and Output
  • 100% Tested Low Voltage Noise:
    3.9nV/rtHz Typ at 1kHz
    5.5nV/rtHz Max at 1kHz
  • Single Supply Operation from 2.5V to 36V
  • Offset Voltage: 100µV Max
  • Low Input Bias Current: 20nA Max
  • High AVOL: 3V/µV Min, RL = 10k
  • High CMRR: 100dB Min
  • High PSRR: 106dB Min
  • Gain Bandwidth Product: 20MHz
  • Operating Temperature Range: –40°C to 85°C
  • Matching Specifications
  • No Phase Inversion
  • 8-Lead SO and 14-Lead SO Packages

Typical Application

LT1679 Typical Application
LT1679 Typical Application

Description

The LT1678/LT1679 are dual/quad rail-to-rail op amps offering both low noise and precision: 3.9nV/rtHz wideband noise, 1/f corner frequency of 4Hz and 90nV peak-to-peak 0.1Hz to 10Hz noise are combined with outstanding precision: 100µV maximum offset voltage, greater than 100dB common mode and power supply rejection and 20MHz gain bandwidth product. The LT1678/LT1679 bring precision as well as low noise to single supply applications as low as 3V. The input range exceeds the power supply by 100mV with no phase inversion while the output can swing to within 170mV of either rail.

The LT1678/LT1679 are offered in the SO-8 and SO-14 packages. A full set of matching specifications are also provided, facilitating their use in matching dependent applications such as a two op amp instrumentation amplifier design. The LT1678/LT1679 are specified for supply voltages of ±15V, single 5V as well as single 3V. For a single amplifier with similiar performance, see the LT1677 data sheet.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LT1679CS#PBF SO-14 S C 05-08-1610 (S14) Yes
LT1679CS#TRPBF SO-14 S C 05-08-1610 (S14) Yes
LT1679IS#PBF SO-14 S I 05-08-1610 (S14) Yes
LT1679IS#TRPBF SO-14 S I 05-08-1610 (S14) Yes


LT1679 Package Drawing
LT1679 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LT1679CS#PBF SO-14 C $5.50 $3.85 Yes
LT1679CS#TRPBF SO-14 C $3.91 Yes
LT1679IS#PBF SO-14 I $6.43 $4.50 Yes
LT1679IS#TRPBF SO-14 I $4.56 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Strain Gauge Amplifiers
  • Portable Microphones
  • Battery-Powered Rail-to-Rail Instrumentation
  • Low Noise Signal Processing
  • Microvolt Accuracy Threshold Detection
  • Infrared Detectors

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LT1679

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