The LMP8645 and the LMP8645HV devices are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high-input common-mode voltages.
Operating from a supply range of 2.7 V to 12 V, the LMP8645 accepts input signals with a common-mode voltage range of 2 V to 42 V, while the LMP8645HV accepts input signals with a common-mode voltage range of 2 V to 76 V. The LMP8645 and LMP8645HV have adjustable gain for applications where supply current and high common-mode voltage are the determining factors. The gain is configured with a single resistor, providing a high level of flexibility, as well as accuracy as low as 2% (maximum) including the gain setting resistor. The output is buffered to provide low output impedance. This high-side current sense amplifier is ideal for sensing and monitoring currents in DC or battery-powered systems, has excellent AC and DC specifications over temperature, and keeps errors in the current sense loop to a minimum. The LMP8645 is an ideal choice for industrial, automotive, and consumer applications, and is available in SOT-6 package.
|Part number||Order||Common mode voltage (Max) (V)||Common mode voltage (Min) (V)||Input offset (+/-) (Max) (uV)||Input offset drift (+/-) (Typ) (uV/C)||Gain (V/V)||Gain error (%)||Gain error drift (+/-) (Max) (ppm/°C)||CMRR (Min) (dB)||Bandwidth (kHz)||Supply voltage (Max) (V)||Supply voltage (Min) (V)||Iq (Max) (mA)||Number of channels (#)||Comparators (#)||Features||Rating||Operating temperature range (C)||Package Group||Package size: mm2:W x L (PKG)|
||42||-2||1000||4||Adjustable||2||140||60||990||12||2.7||0.61||1||0||Low-side Capable||Catalog||-40 to 125||SOT-23-THIN | 6||6SOT-23-THIN: 8 mm2: 2.8 x 2.9 (SOT-23-THIN | 6)|
|12||2.7||0.722||1||0||Low-side Capable||Catalog||-40 to 125||SOT-23-THIN | 6||6SOT-23-THIN: 8 mm2: 2.8 x 2.9 (SOT-23-THIN | 6)|