Features and Benefits
- Supply Range:
- 5V to 100V, 105V Absolute Maximum (LTC6101HV)
- 4V to 60V, 70V Absolute Maximum (LTC6101)
- Low Offset Voltage: 300μV Max
- Fast Response: 1μs Response Time (0V to 2.5V on a 5V Output Step)
- Gain Configurable with 2 Resistors
- Low Input Bias Current: 170nA Max
- PSRR: 118dB Min
- Output Current: 1mA Max
- Low Supply Current: 250μA, VS = 12V
- Specifi ed Temperature Range: –40°C to 125°C
- Operating Temperature Range: –55°C to 125°C
- Low Profi le (1mm) SOT-23 (ThinSOT™) Package
The LTC6101/LTC6101HV are versatile, high voltage, high side current sense amplifiers. Design flexibility is provided by the excellent device characteristics; 300µV Max offset and only 375µA (typical at 60V) of current consumption. The LTC6101 operates on supplies from 4V to 60V and LTC6101HV operates on supplies from 5V to 100V.
The LTC6101 monitors current via the voltage across an external sense resistor (shunt resistor). Internal circuitry converts input voltage to output current, allowing for a small sense signal on a high common mode voltage to be translated into a ground referenced signal. Low DC offset allows the use of a small shunt resistor and large gain-setting resistors. As a result, power loss in the shunt is reduced.
The wide operating supply range and high accuracy make the LTC6101 ideal for a large array of applications from automotive to industrial and power management. A maximum input sense voltage of 500mV allows a wide range of currents to be monitored. The fast response makes the LTC6101 the perfect choice for load current warnings and shutoff protection control. With very low supply current, the LTC6101 is suitable for power sensitive applications.
The LTC6101 is available in 5-lead SOT-23 and 8-lead MSOP packages.
- Current Shunt Measurement
- Battery Monitoring
- Remote Sensing
- Power Management
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)
DC1115A: Demo Board for the LTC6101 High Voltage, High-Side Current Sense Amplifier in SOT-23
Documentation & Resources
R503 Reliability Data3/26/201816 K
DC1115A - Demo Manual9/24/2009128K
Precision High Side Current Sense Amplifiers7/13/20171M
Current Sensing with PMBus Digital Power System Managers—Part 21/1/2022 Analog Dialogue
Finally, High Voltage Current Sensing Made Easy5/1/2005 LT Journal
Tools & Simulations
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Models for the following parts are available in LTspice:
LTC6101 Companion Parts
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