LT6657
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LT6657

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

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Part Models 20
1ku List Price Starting From $3.83
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
Additional Details
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The LT6657 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.

Applications

  • High Temperature Industrial
  • High Resolution Data Acquisition Systems
  • Instrumentation and Process Control
  • Automotive Control and Monitoring
  • Medical Equipment
  • Shunt and Negative Voltage References
Part Models 20
1ku List Price Starting From $3.83

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Documentation

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Oct 11, 2022

- 22_0244

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Feb 3, 2020

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Jun 21, 2022

- 22_0050

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PRODUCTION

Feb 3, 2020

- 20_0128

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Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT6657AHMS8-1.25#PBF

PRODUCTION

LT6657AHMS8-1.25#TRPBF

PRODUCTION

LT6657AHMS8-2.5#PBF

PRODUCTION

LT6657AHMS8-2.5#TRPBF

PRODUCTION

LT6657AHMS8-3#PBF

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LT6657AHMS8-3#TRPBF

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LT6657AHMS8-4.096#PBF

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LT6657AHMS8-4.096#TRPBF

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Jun 21, 2022

- 22_0050

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

Software & Part Ecosystem

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

Reference Designs 1

Figure 1. CN0548 Block Diagram

Isolated High Voltage, High Current, Measurement Module

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CN0548

Isolated High Voltage, High Current, Measurement Module

CN0548

Circuits from the lab

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Isolated High Voltage, High Current, Measurement Module

Features and Benefits

  • Wide Current (+/-10 A) and Voltage (80 V) Input Range
  • Configurable gain/attenuation settings
  • Galvanically Isolated
  • Arduino form factor compatible
View Detailed Reference Design external link

Design & Integration Tools

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Videos

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2022-05-13

01:02

CN0548: Isolated High Voltage, High Current, Measurement Module

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