MAX9003ESA+

Overview

The MAX9003ESA+ is a low-power, high-speed single-supply integrated circuit combining an operational amplifier, a comparator, and a precision voltage reference. It operates from +2.5V to +5.5V supplies with typical quiescent current of 410µA. The op-amp offers an 8MHz gain-bandwidth product and 6.0V/µs slew rate at gains ≥10V/V. The comparator features 185ns propagation delay and ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy. It is housed in an 8-pin SOIC package.

Feature Summary

• Combines high-speed op amp, fast comparator, and precision reference in one space-saving package
• Operates on single supply voltages ranging from +2.5V to +5.5V
• Features rail-to-rail output swing for both the amplifier and comparator stages
• Includes internal ±2mV comparator hysteresis for noise immunity

Applications

• Smart card readers
• Crossing detectors
• Infrared receivers
• Bar-code readers for remote controls
• Keyless entry systems

Procurement Notes

Verify component authenticity through authorized channels. Confirm datasheet revision status matches design requirements. Ensure environmental compliance documentation aligns with target market regulations. Validate pinout compatibility during integration planning.

Selection Notes

Select this device when a combined signal chain solution is required within tight space constraints. Choose over discrete components to reduce board area and simplify layout. Consider the 8MHz bandwidth for applications requiring faster response than unity-gain stable variants offer.

Part Context

This component belongs to the MAX9000 family of mixed-signal ICs designed for portable electronics. The family integrates multiple analog functions to minimize external component count. The MAX9003 variant specifically targets applications needing higher speed amplification compared to the unity-gain stable MAX9000/MAX9001/MAX9002 options.

Replacement Considerations

Consult official manufacturer documentation for confirmed substitute part numbers before implementation. Verify electrical parameter equivalence and pinout compatibility. Review any functional differences regarding shutdown modes or reference availability in alternative devices.

FAQ

How does the MAX9003 differ from the MAX9000 regarding op-amp stability?

The MAX9003 op-amp is decompensated and stable only for closed-loop gains of +10V/V or greater, whereas the MAX9000 is unity-gain stable.

What is the function of the comparator's inverting input in the MAX9003?

In the MAX9003, the comparator's inverting input is internally connected to the precision reference output.

Does the MAX9003 support a shutdown mode?

No, the MAX9003 does not feature a shutdown mode; this function is available only in the MAX9001 and MAX9004 variants.