MAX9939AUB+T

MAX9939AUB+T is a general-purpose, SPI programmable-gain amplifier with input VOS trim and output op-amp. It features programmable differential gains from 0.2V/V to 157V/V, input offset-voltage compensation, and an output amplifier that can be configured either as a high-order active filter or to provide a differential output. It is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation and sonar data acquisition applications. Precision resistor matching provides extremely low gain tempco and high CMRR. Output amplifier is designed for high bandwidth and low-bias currents, making it ideal for use in multiple feedback active filter topologies that offer much higher Qs and stopband attenuation than Sallen-Key architectures. Applications include sensorless motor control, differential to single-ended conversion, differential-i/p, differential-o/p signal amplification, sensor interface and signal processing.

• Extremely low gain tempco, input offset-voltage compensation
• Integrated amplifier for R/C programmable active filter
• Input protection to ±16V
• Gain error is 0.05% typ at TA=+25°C, 0.2V ≤ VOUTA ≤ VCC - 0.2V
• Gain temperature-coefficient is 2.2ppm/°C at VCC=5V, VGND=0V, VINA+=VINA-, gain=10V/V
• Input-voltage noise density is 54nV/√Hz typ at f=10KHz, gain=157V/V
• Supply voltage range from 2.9 to 5.5V at guaranteed by PSRR
• Slew rate is 6.4V/µs typ at VCC=5V, VGND=0V, VINA+=VINA-, gain=10V/V
• 10 µMAX package
• Operating temperature range from -40°C to +125°C

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