AD8672ARMZ

Overview

The AD8672ARMZ is a dual-channel precision operational amplifier from Analog Devices, housed in an 8-lead MSOP package. It features a gain bandwidth product of 10 MHz and a slew rate of 4 V/µs. The device exhibits very low noise with a density of 2.8 nV/√Hz at 1 kHz and peak-to-peak noise of 77 nV between 0.1 Hz and 10 Hz. Maximum input offset voltage is 75 µV, and maximum input bias current is 12 nA. It operates on dual supplies ranging from ±5 V to ±15 V with a supply current of approximately 3 mA per amplifier.

Feature Summary

• Very low voltage noise density and minimal low-frequency flicker noise for high signal integrity.
• Low input bias current and offset voltage to minimize DC errors in precision circuits.
• Unity-gain stable operation without output phase reversal when inputs exceed supply rails.
• Capacitive load stability capable of driving loads exceeding 1000 pF.

Applications

• PLL filters
• Filters for GPS
• Instrumentation
• Sensors and controls
• Professional quality audio

Procurement Notes

Verify the specific ordering suffix to confirm the package type and reel configuration. The 'ARMZ' designation indicates an 8-lead MSOP package that is RoHS compliant. Confirm the temperature range matches the extended industrial specification of -40°C to +125°C. Ensure the source documentation aligns with the Rev F datasheet specifications for accurate electrical parameters.

Selection Notes

Select this component for applications requiring high precision and low noise within a compact surface-mount footprint. The MSOP package offers half the board space of comparable amplifiers. Consider the 10 MHz bandwidth and 4 V/µs slew rate for mid-frequency signal processing tasks. Verify that the power supply architecture supports the required dual-supply voltage range.

Part Context

The AD8672ARMZ belongs to the AD8671/AD8672/AD8674 series of precision amplifiers designed by Analog Devices. This family combines ultralow noise, high precision, speed, and stability. The dual-channel AD8672 variant provides two independent amplifiers in a single package, sharing a common ground and supply connection.

Replacement Considerations

Check the Ordering Guide for equivalent packages such as the AD8672ARZ (SOIC) or variants with different reel packaging like AD8672ARMZ-REEL. Ensure thermal resistance and pinout compatibility are verified before substitution.

FAQ

Does the AD8672 exhibit output phase reversal?

No, the AD8672 does not exhibit output phase reversal even when the input voltage exceeds the supply rails by up to 1 V.

What is the maximum capacitive load the AD8672 can drive stably?

The outputs are stable with capacitive loads of over 1000 pF.