Features and Benefits
- 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.
- Battery Monitoring
- Power Monitoring
- Portable Phones
- Cellular Phones
- Portable Test/Measurement Systems
- Battery-Operated Systems
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
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
Documentation & Resources
R334 Reliability Data3/22/2018
DC907A - Demo Manual10/22/2009
Micropower, Precision Current Sense Amplifier Operates from 2.5V to 60V9/1/1999 LT Journal
Tools & Simulations
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