AD8421BRMZ-R7

Instrumentation, Op Amps, Buffer Amps Overview

The AD8421BRMZ-R7 is a low-power, precision instrumentation amplifier manufactured by Analog Devices Inc. It features a maximum supply current of 2.3 mA and an input voltage noise density of 3.2 nV/√Hz at 1 kHz. The device offers a small-signal bandwidth of 10 MHz at unity gain and a slew rate of 35 V/µs. It provides high common-mode rejection ratios, reaching up to 140 dB at G = 1000. The BR grade specifies a minimum DC CMRR of 94 dB at G = 1 and a maximum input offset voltage drift of 0.2 µV/°C. Gain is programmable from 1 to 10,000 using a single external resistor. It operates on dual supplies from ±2.5 V to ±18 V or a single supply from 5 V to 36 V.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Extremely low noise performance with ultralow bias current suitable for high source impedance sensors
• High-speed signal processing capabilities including wide bandwidth and fast settling time
• Robust input protection allowing voltages up to 40 V beyond the opposite supply rail without damage
• Precision DC characteristics ensuring minimal offset voltage drift over temperature

Instrumentation, Op Amps, Buffer Amps Applications

• Medical instrumentation
• Precision data acquisition systems
• Microphone preamplification
• Vibration analysis
• Multiplexed input applications

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify that the specific BRM suffix corresponds to the MSOP-8 package variant required for your design. Confirm the -R7 designation indicates reel packaging if automated assembly is planned. Ensure the component meets RoHS compliance standards relevant to your region. Cross-reference the datasheet revision A specifications against your system requirements for accuracy.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when low noise and high speed are critical simultaneously. The BR grade offers tighter DC specifications compared to the AR grade. Consider the MSOP-8 package for space-constrained PCB layouts. Evaluate the need for input protection if signals may exceed supply rails significantly.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the AD8421 family of instrumentation amplifiers designed for signal conditioning. It utilizes a current feedback architecture to maintain high performance at various gain settings. The device is optimized for extracting low-level signals in noisy environments. It serves as a key building block in analog front-end circuits requiring high fidelity.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.