ADA4099-2HRZ

Overview

The ADA4099-2HRZ is a dual-channel, precision operational amplifier from Analog Devices featuring Over-The-Top input capability. It operates on supply voltages ranging from 3.15 V to 50 V with a typical gain-bandwidth product of 8 MHz and a slew rate of 5.5 V/µs. The device offers low input offset voltage (±40 µV max) and low noise (7 nV/√Hz). It includes a low-power shutdown function consuming 20 µA maximum. The H-grade variant supports an extended operating temperature range from -55°C to +150°C and is housed in an 8-lead SOIC package.

Feature Summary

• Over-The-Top input stage allows common-mode voltage operation up to +VS + 70 V, independent of the positive supply rail.
• Robust input protection tolerates differential overdrive up to ±80 V without phase reversal or damage.
• Low power shutdown mode reduces supply current to a maximum of 20 µA for energy-efficient system management.
• High precision performance characterized by low input offset voltage drift and high common-mode rejection ratio.

Applications

• Industrial sensor signal conditioning
• Supply current sensing applications
• Battery and power supply monitoring systems
• Front-end amplifiers in abusive environments

Procurement Notes

Verify the specific grade suffix 'H' to confirm the extended temperature rating of -55°C to +150°C, as other grades may have different thermal limits. Ensure the package type matches the required footprint, specifically the 8-lead SOIC_N configuration. Confirm that the application circuitry accounts for the Over-The-Top input behavior when signals exceed the positive supply rail. Check datasheet specifications for shutdown pin logic levels if active power management is utilized in the design.

Selection Notes

Select this component when designing circuits that require signal detection above the positive supply voltage while maintaining high precision. The wide common-mode range makes it suitable for high-side current sensing or ground-referenced sensors in floating supply systems. Consider the 8 MHz bandwidth and 5.5 V/µs slew rate for moderate-speed signal processing tasks. The availability of a shutdown feature aids in optimizing power consumption for battery-operated or intermittently active industrial equipment.

Part Context

The ADA4099-2HRZ belongs to the ADA4099 family of robust, precision operational amplifiers designed for demanding industrial environments. This family integrates Over-The-Top technology to handle extreme input conditions. The dual-channel version provides two independent amplifiers in a single package, offering space efficiency compared to using two single-channel devices. The H-grade designation indicates qualification for harsher thermal conditions compared to standard commercial grades.

Replacement Considerations

The ADA4099-1 serves as the single-channel counterpart within the same family. Other dual-channel variants like the ADA4099-2ARMZ or ADA4099-2ACPZ-R2 offer different package options such as MSOP or LFCSP. Verify pin compatibility and thermal characteristics when substituting packages. Ensure that any replacement maintains the Over-The-Top input specification if signals exceeding the supply rail are present in the application.

FAQ

What is the Over-The-Top input capability?

The Over-The-Top input stage allows the common-mode input voltage to operate from −VS to +VS + 70 V, enabling signal detection even when biased above the positive supply rail.

How does the device handle input overdrive?

The inputs are protected against temporary voltage excursions and can tolerate differential overdrive up to ±80 V without damage or inducing phase reversal.

What is the power consumption in shutdown mode?

When the shutdown pin is asserted high, the supply current per channel drops to a maximum of 20 µA, significantly reducing power usage during inactive periods.