LMP8640HV Datasheet, PDF (1/22 Pages) Texas Instruments – Precision High Voltage Current Sense Amplifier

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LMP8640
LMP8640HV
SNOSB28D – AUGUST 2010 – REVISED NOVEMBER 2011
Precision High Voltage Current Sense Amplifier
Check for Samples: LMP8640, LMP8640HV
FEATURES
1
•2 Typical Values, T_A = 25°C
• High Common-Mode Voltage Range
– LMP8640: -2V to 42V
– LMP8640HV: -2V to 76V
• Supply Voltage Range: 2.7V to 12V
• Gain Options: 20V/V; 50V/V; 100V/V
• Max Gain Error: 0.25%
• Low Offset Voltage: 900µV
• Input Bias Current: 13 µA
• PSRR: 85 dB
• CMRR (2.1V to 42V): 103 dB
• Temperature Range: -40°C to 125°C
• 6-Pin SOT Package
APPLICATIONS
• High-Side Current Sense
• Vehicle Current Measurement
• Motor Controls
• Battery Monitoring
• Remote Sensing
• Power Management
DESCRIPTION
The LMP8640 and the LMP8640HV are precision current sense amplifiers that detect small differential voltages
across a sense resistor in the presence of high input common mode voltages with a supply voltage range from
2.7V to 12V.
The LMP8640 accepts input signals with common mode voltage range from -2V to 42V, while the LMP8640HV
accepts input signal with common mode voltage range from -2V to 76V. The LMP8640 and LMP8640HV have
fixed gain for applications that demand accuracy over temperature. The LMP8640 and LMP8640HV come out
with three different fixed gains 20V/V, 50V/V, 100V/V ensuring a gain accuracy as low as 0.25%. The output is
buffered in order to provide low output impedance. This high side current sense amplifier is ideal for sensing and
monitoring currents in DC or battery powered systems, excellent AC and DC specifications over temperature,
and keeps errors in the current sense loop to a minimum. The LMP8640 and LMP8640HV are ideal choice for
industrial, automotive and consumer applications, and it is available in SOT-6 package.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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