LT1997-3
Info : RECOMMENDED FOR NEW DESIGNS
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LT1997-3

Precision, Wide Voltage Range Gain Selectable Amplifier

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.77
Features
  • Pin Configurable as a Difference Amplifier, Inverting Amplifier or Noninverting Amplifier
  • 91dB Minimum DC CMRR (Gain = 1)
  • 65dB AC CMRR (at 100kHz, Gain = 1)
  • 0.006% (60ppm) Maximum Gain Error (Gain = 1)
  • 1ppm/°C Maximum Gain Error Drift
  • 2ppm Maximum Gain Nonlinearity
  • ±160V Common Mode Voltage Range
  • Wide Supply Voltage Range: 3.3V to 50V
  • Rail-to-Rail Output
  • 350μA Supply Current
  • 60μV Maximum Op Amp Offset Voltage
  • 1.1MHz –3dB Bandwidth (Gain = 1)
  • Low-Power Shutdown: 20μA
  • Space-Saving MSOP and DFN Packages
Additional Details
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The LT1997-3 combines a precision operational amplifier with highly-matched resistors to form a one-chip solution for accurately amplifying voltages. Gains from –13 to +14 with accuracy of 0.006% (60ppm) can be achieved using no external components. The LT1997-3 is particularly well suited for use as a difference amplifier, where the excellent resistor matching results in a common mode rejection ratio of greater than 91dB.

The amplifier features a 60μV maximum input offset voltage and a -3dB bandwidth of 1.1MHz (Gain = 1). The LT1997-3 operates from any supply voltage from 3.3V to 50V and draws only 350μA supply current. The output typically swings to within 100mV of either supply rail.

The resistors maintain their excellent matching over temperature; the matching temperature coefficient is guaranteed less than 1ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 2ppm.

The LT1997-3 is fully specified at 5V and ±15V supplies and from –40°C to 125°C. The device is available in space saving 16-lead MSOP and 4mm × 4mm DFN14 packages.

Applications

  • High Side or Low Side Current Sensing
  • Bidirectional Wide Common Mode Range Current Sensing
  • High Voltage to Low Voltage Level Translation
  • Industrial Data-Acquisition Front-Ends
  • Replacement for Isolation Circuits
  • Differential to Single-Ended Conversion
Part Models 8
1ku List Price Starting From $3.77

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT1997HDF-3#PBF
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LT1997IDF-3#PBF
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LT1997IDF-3#TRPBF
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LT1997IMS-3#PBF
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Product Lifecycle

PCN

Feb 4, 2020

- 20_0129

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT1997HMS-3#PBF

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LT1997HMS-3#TRPBF

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Filter by Model

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Part Models

Product Lifecycle

PCN

Feb 4, 2020

- 20_0129

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Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT1997HMS-3#PBF

PRODUCTION

LT1997HMS-3#TRPBF

PRODUCTION

LT1997IMS-3#PBF

PRODUCTION

LT1997IMS-3#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2551A-A

LT1997 – Configurable Precision Amplifier

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DC2551A-A

LT1997 – Configurable Precision Amplifier

LT1997 – Configurable Precision Amplifier

Product Detail

Demonstration Circuit 2551A is a Configurable Precision Amplifier featuring the LT1997.

The DC2551A-A supports the LT1997-3 version.

This demo board provides a rapid evaluation tool with jumpers providing the typical interconnection options that facilitate setting the pin-strapped internal gain configuration. The LT1997 is unusual in that it may be powered from a low voltage (down to 3.3V) while it accepts sign particularly high supply voltages, up to 50V. Connection points are provided to wire the amplifier in other configurations besides those possible with the jumpers alone.

Tools & Simulations

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.

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