LMP92064

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMP92064 SNOSCX0A – JUNE 2013 – REVISED DECEMBER 2014 LMP92064 Precision Low-Side, 125-kSps Simultaneous Sampling, Current Sensor and Voltage Monitor With SPI 1 Features 1 Two Simultaneous Sampling 12-Bit ADCs – Conversion Rate: 125 kSps (Minimum) 12-Bit Current Sense Channel – Input-referred Offset: ±15 μV – Common-mode Voltage Range: –0.2 V to 2 V – Maximum Differential Input Voltage: 75 mV – Fixed Gain: 25 V/V – Gain Error: ±0.75% (Maximum) – Bandwidth (–3dB): 70 kHz – DC PSRR: 100 dB – DC CMRR: 110 dB 12-Bit Voltage Channel – INL: ±1 LSB – Offset Error: ±2 mV (Maximum) – Gain Error: ±0.75% (Maximum) – Maximum Input Voltage: 2.048 V – Bandwidth: 100 kHz Internal Reference SPI Frequency: Up to 20 MHz Temperature Range: –40°C to 105°C 16-Pin WSON Package 2 Applications Enterprise Servers Telecommunications Power Management 3 Description The LMP92064 is a precision low-side digital current sensor and voltage monitor with a digital SPI interface. This analog frontend (AFE) includes a precision current sense amplifier to measure a load current across a shunt resistor and a buffered voltage channel to measure the voltage supply of the load. The current and voltage channels are sampled simultaneously by independent 125-kSps, 12-bit ADC converters, allowing for very accurate power calculations in unidirectional sensing applications. The LMP92064 includes an internal 2.048...