LT1787

PRODUCTION

Precision, High Side Current Sense Amplifiers

Data Sheet Product Selection Table
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Overview

  • Input Offset Voltage: 75µV (Max)
  • 60V Supply Operation (LT1787HV)
  • 12-Bit Dynamic Range
  • Operating Current: 60µA
  • User-Selectable External Sense Resistor
  • Bidirectional High Side Current Sensing
  • Unidirectional or Bidirectional Output
  • Input Noise Filtering
  • Available in 8-Lead SO and MSOP Packages
  • –40°C to 125°C Operating Temperature Range

The LT1787 is a complete micropower precision high side current sense amplifier. The LT1787 monitors bidirectional currents via the voltage across an external sense resistor. A current or voltage output indicates the direction and magnitude of the sense current. The LT1787 delivers greater than a 12-bit dynamic range with ultralow 40µV input offset voltage compared to a typical 250mV full-scale input voltage. A fixed gain of 8 is set by onboard precision resistors. Input signal filtering is easily implemented with a capacitor between the FIL– and FIL+ pins. The LT1787HV operates from 2.5V to 60V total supply voltage and the LT1787 operates from 2.5V to 36V total supply voltage. Both versions have a PSRR in excess of 120dB. The LT1787/LT1787HV draw only 60µA and are available in 8-lead SO and MSOP packages.

Applications

  • Battery Monitoring
  • Power Monitoring
  • Portable Phones
  • Cellular Phones
  • Portable Test/Measurement Systems
  • Battery-Operated Systems
LT1787
Precision, High Side Current Sense Amplifiers
12-Bit Dynamic Resolution Unidirectional Output into LTC1286 ADC Input Offset Voltage vs Supply Voltage Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Design Note 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT1787
LTspice

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.

Evaluation Kits

eval board
schematic 1
DC907A-B

LTC6102, LT6100, LT1787, LTC2054, and LTC2439-1 (Requires DC590B) | Demo Board

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Product Details

DC907A-B Demo Board for:

LTC2054 Single Micropower Zero-Drift Operational Amplifiers
LTC6102 Precision Zero Drift Current Sense Amplifier
LT1787 Precision, High Side Current Sense Amplifiers
LT6100 Precision, Gain Selectable High Side Current Sense Amplifier
LTC2439-1 8-/16-Channel 16-Bit No Latency Delta Sigma ADC
DC907A-B
LTC6102, LT6100, LT1787, LTC2054, and LTC2439-1 (Requires DC590B) | Demo Board
DC907A-B - Schematic

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