ADA4099-2BRZ-RL7

Overview

The ADA4099-2BRZ-RL7 is a dual-channel, precision operational amplifier manufactured by Analog Devices Inc. It features an Over-The-Top input architecture allowing operation from −VS to +VS and beyond, with a common-mode range extending up to −VS + 70 V. The device supports a wide supply voltage range of +3.15 V to +50 V and consumes 1.5 mA per channel. Key electrical specifications include a gain-bandwidth product of 8 MHz, a slew rate of 5.5 V/µs, and an input offset voltage of ±40 µV maximum. It offers low noise (7 nV/√Hz at 100 Hz), high CMRR (118 dB minimum), and PSRR (123 dB minimum). The part includes a low-power shutdown feature drawing 20 µA maximum and is rated for operating temperatures from −55°C to +150°C.

Feature Summary

• Over-The-Top input stage enables robust signal detection even when biased above the positive supply rail.
• Unity-gain stable design capable of driving loads requiring up to 20 mA per channel.
• Integrated low-power shutdown function allows for significant current reduction during inactive periods.
• High immunity to electrostatic discharge and overdrive conditions without phase reversal.

Applications

• Industrial sensor conditioning
• Supply current sensing
• Battery and power supply monitoring
• Front-end amplifiers in abusive environments
• 4 mA to 20 mA transmitters

Procurement Notes

Verify that the specific suffix BRZ corresponds to the B grade and SOIC_N package variant as defined in the official Analog Devices ordering guide. Confirm that the RL7 designation indicates the correct reel packaging quantity and tape-and-reel format required for automated assembly processes. Cross-reference the manufacturer part number against the latest datasheet revision to ensure compatibility with intended thermal and electrical performance requirements.

Selection Notes

Select this component for applications requiring high voltage tolerance and precision in harsh environments. The dual-channel configuration is suitable for differential sensing or multi-sensor interfaces. Consider the 8 MHz bandwidth and 5.5 V/µs slew rate for moderate-speed signal processing. Ensure the PCB layout accommodates the SOIC_N package dimensions and provides adequate thermal dissipation for the specified power ratings under maximum load conditions.

Part Context

This device belongs to the ADA4099 family of robust, precision operational amplifiers designed for demanding industrial applications. The series combines high voltage handling capabilities with low noise and low offset characteristics. The dual-channel version provides two independent amplifiers in a single package, offering space efficiency compared to discrete single-channel solutions while maintaining identical performance specifications across all channels.

Replacement Considerations

ADA4099-2ARMZ is a pin-compatible alternative available in MSOP packaging. ADA4099-2BCPZ is another dual-channel option within the same family. Verify pinout compatibility and thermal resistance differences when substituting packages. Ensure that the replacement part meets the specific B or H grade requirements for offset voltage and temperature range.

FAQ

How does the Over-The-Top input stage function?

The Over-The-Top input stage utilizes a common base configuration that activates when the common-mode input voltage exceeds +VS - 1.5 V. This allows the amplifier to process signals significantly higher than the positive supply rail without damage or loss of DC accuracy.

What is the behavior of the output during shutdown?

When the SHDNx pins are asserted high (above −VS + 1.5 V), the amplifier enters a shutdown state. The output transitions to a high impedance state, and the supply current drops to a maximum of 20 µA.

Can the inputs withstand differential overvoltage?

Yes, the inputs can tolerate differential voltages up to ±80 V without sustaining damage or inducing parametric degradation. Internal protection circuitry limits current and prevents phase reversal during such events.