LT6657 - 1.5ppm/°C Drift, Low Noise, Buffered Reference

Features

  • Low Drift
    A Grade: 1.5ppm/°C Max
    B Grade: 3ppm/°C Max
  • Low Noise:
    0.5ppmP-P (0.1Hz to 10Hz)
    0.8ppmRMS (10Hz to 1kHz)
  • Wide Supply Range to 40V
  • Sources and Sinks 10mA Min
  • Line Regulation: 0.2ppm/V
  • Load Regulation: 2μV/mA
  • Reverse Supply Protection
  • Reverse Output Protection
  • Low Power Shutdown: <4μA Max
  • 1.5V Min Supply for 1.25V Option
  • Thermal Protection
  • Can Operate in Shunt Mode
  • Configurable as a Negative Reference
  • Available Output Voltage Options: 1.25V, 2.5V, 3V,
    4.096V, 5V
  • MSOP-8 Package
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT6657 Typical Application
LT6657 Typical Application

Description

The LT®6657 is a precision voltage reference that combines robust operating characteristics with extremely low drift and low noise. With advanced curvature compensation, this bandgap reference achieves 1.5ppm/°C drift with predictable temperature behavior, and an initial voltage accuracy of 0.1%. It also offers 0.5ppmP-P noise and very low temperature cycling hysteresis.

The LT6657 is a low dropout reference that can be powered from as little as 50mV above the output voltage, up to 40V. The buffered output supports ±10mA of output drive with low output impedance and precise load regulation. The high sink current capability allows operation as a negative voltage reference with the same precision as a positive reference. This part is safe under reverse battery conditions, and includes current protection when the output is short-circuited and thermal shutdown for overload conditions. A shutdown is included to allow power reduction while enabling a quick turn-on.

The LT6657 is fully specified over the temperature range of –40°C to 125°C. It is available in the 8-lead MSOP package.

Packaging

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

Part Number Package Code Temp Package
Drawing
RoHS
LT6657AHMS8-1.25#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-1.25#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-2.5#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-2.5#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-3#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-3#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-4.096#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-4.096#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-5#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657AHMS8-5#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-1.25#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-1.25#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-2.5#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-2.5#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-3#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-3#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-4.096#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-4.096#TRPBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-5#PBF MS-8 MS8 H 05-08-1660 Yes
LT6657BHMS8-5#TRPBF MS-8 MS8 H 05-08-1660 Yes


LT6657 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
LT6657AHMS8-1.25#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-1.25#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-2.5#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-2.5#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-3#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-3#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-4.096#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-4.096#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-5#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-5#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657BHMS8-1.25#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-1.25#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-2.5#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-2.5#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-3#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-3#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-4.096#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-4.096#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-5#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-5#TRPBF MS-8 H $4.50 $3.25 Yes
Buy NowRequest Samples
* 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

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT6657AHMS8-1.25#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-1.25#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-2.5#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-2.5#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-3#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-3#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657AHMS8-5#PBF MS-8 H $7.66 $5.49 Yes
LT6657AHMS8-5#TRPBF MS-8 H $7.72 $5.55 Yes
LT6657BHMS8-1.25#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-1.25#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-2.5#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-2.5#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-3#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-3#TRPBF MS-8 H $4.50 $3.25 Yes
LT6657BHMS8-5#PBF MS-8 H $4.44 $3.19 Yes
LT6657BHMS8-5#TRPBF MS-8 H $4.50 $3.25 Yes
Buy NowRequest Samples
* 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.

Applications

  • High Temperature Industrial
  • High Resolution Data Acquisition Systems
  • Instrumentation and Process Control
  • Automotive Control and Monitoring
  • Medical Equipment
  • Shunt and Negative Voltage References

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Design Tools

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Models for the following parts are available in LTspice:
LT6657-2.5

Technical Support