LT6105
Precision, Rail-to-Rail Input Current Sense Amplifier
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Overview
Features and Benefits
- Very Wide, Over-the-Top®, Input Common Mode Range
- Extends 44V Above V – (Independent of V +)
- Extends –0.3V Below V – - Wide Power Supply Range: 2.85V to 36V
- Input Offset Voltage: 300µV Maximum
- Gain Accuracy: 1% Max
- Gain Configurable with External Resistors
- Operating Current: 150µA
- Slew Rate: 2V/µs
- Sense Input Current When Powered Down: 1nA
- Full-Scale Output Current: 1mA Minimum
- Operating Temperature Range –40°C to 125°C
- Available in 2mm × 3mm DFN and 8-Lead MSOP Packages
Product Details
The LT6105 is a micropower, precision current sense amplifier with a very wide input common mode range. The LT6105 monitors unidirectional current via the voltage across an external sense resistor. The input common mode range extends from –0.3V to 44V, with respect to the negative supply voltage (V –). This allows the LT6105 to operate as a high side current sense monitor or a low side current sense monitor. It also allows the LT6105 to monitor current on a negative supply voltage, as well as continuously monitor a battery from full charge to depletion. The inputs of LT6105 can withstand differential voltages up to ±44V, which makes it ideal for monitoring a fuse or MOSFET switch.
Gain is configured with external resistors from 1V/V to 100V/V. The input common mode rejection and power supply rejection are in excess of 100dB and the input offset voltage is less than 300µV. A minimum slew rate of 2V/µs ensures fast response to unexpected current changes.
The LT6105 can operate from an independent power supply of 2.85V to 36V and draws only 150µA. When V + is powered down, the sense pins are biased off. This prevents loading of the monitored circuit, irrespective of the sense voltage. The LT6105 is available in a 6-lead DFN and 8-lead MSOP package.
Applications- High Side or Low Side Current Sensing
- Current Monitoring on Positive or Negative Supply Voltages
- Battery Monitoring
- Fuse/MOSFET Monitoring
- Automotive
- Power Management
- Portable Test/Measurement Systems
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R417 Reliability Data3/26/2018
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DC1192A - Demo Manual9/24/2009
Tools & Simulations
LTspice
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LT6105
Product Recommendations
LT6105 Companion Parts
Design Resources
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Sample & Buy
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Buy Now Pricing
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List Pricing
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Lead Times
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Sampling
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.