• Unless Otherwise Noted, Typical Values at TA = 25°C, VS = 5.0 V, Gain = 20x
  • TCVOS 10 μV/°C Maximum
  • CMRR 90 dB Minimum
  • Input offset voltage 1 mV Maximum
  • CMVR at VS = 3.3 V, –4 V, to 27 V
  • CMVR at VS = 5 V, –22 V to 60 V
  • Operating Ambient Temperature Range –40°C to 125°C
  • Single-Supply Bidirectional Operation
  • All Minimum and Maximum Limits 100% Tested
  • LMP8601-Q1 is Qualified for Automotive Applications:
    • Device Temperature AEC-Q100 Grade 1: –40°C to 125°C Operating Range
    • Device HBM ESD Classification: Level 2 (3A on inputs)
    • Device CDM ESD Classification: Level C6
    • Device MM ESD Classification: Level M2

• High-Side and Low-Side Driver Configuration Current Sensing
• Bidirectional Current Measurement
• Current Loop to Voltage Conversion
• Automotive Fuel Injection Control
• Transmission Control
• Power Steering
• Battery Management Systems

The LMP8601 and LMP8601-Q1 devices are fixed 20x gain precision amplifiers that will amplify and filter small differential signals in the presence of high common-mode voltages. The input common-mode voltage range is –22 V to +60 V when operating from a single 5-V supply, or –4 V to +27 V with a 3.3-V supply. The LMP8601 and LMP8601-Q1 are ideal parts for unidirectional and bidirectional current sensing applications.

The fixed gain is achieved in two separate stages, a preamplifier with a gain of 10x and an output stage buffer amplifier with a gain of 2x. The path between the two stages is brought out on two pins to enable the option of an additional filter network or modifying the gain.

The offset input pin enables the user to use these devices for unidirectional or bidirectional single supply voltage current sensing.

The LMP8601-Q1 incorporates enhanced manufacturing and support processes for the automotive market and is compliant with the AEC Q100 standard.

If higher gain is required, the LMP8602 is available with a gain of 50, or the LMP8603 with a gain of 100.