AD8538AUJZ-REEL7

Overview

The AD8538AUJZ-REEL7 is a single-channel, low power, precision auto-zero operational amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V and is housed in a 5-lead TSOT-23 package. The device features an extremely low maximum input offset voltage of 13 µV at 25°C and a minimal input offset drift of 0.03 µV/°C across the extended industrial temperature range of −40°C to +125°C. It maintains a low supply current of 180 µA per amplifier while delivering high gain, common-mode rejection ratio (CMRR), and power supply rejection ratio (PSRR).

Feature Summary

• Auto-zero architecture ensures ultra-low offset voltage and drift for high precision.
• Single-supply operation compatible with battery-powered systems.
• Low quiescent current consumption suitable for portable applications.

Applications

• Mobile communications
• Portable instrumentation
• Battery-powered devices
• Sensor interfaces
• Electronic scales

Procurement Notes

Verify that the specific ordering suffix REEL7 corresponds to the required tape and reel packaging configuration before procurement. Confirm the component meets RoHS compliance standards as indicated by the Z suffix. Ensure the selected part matches the automotive or commercial grade requirements based on the application environment. Cross-reference the datasheet revision B specifications against the manufacturing lot date code to ensure consistency with design parameters.

Selection Notes

Select this component when designing circuits requiring high DC accuracy without external trimming. The 5-lead TSOT-23 package is ideal for space-constrained PCB layouts. Consider the 180 µA supply current for battery life calculations. Verify that the load capacitance does not exceed stability limits defined in the dynamic performance characteristics. This single-channel variant is distinct from the dual-channel AD8539.

Part Context

This part belongs to the AD8538/AD8539 family of low power, precision, auto-zero amplifiers. The AD8538 represents the single-channel version, whereas the AD8539 provides two channels in an 8-lead package. Both share identical core electrical characteristics but differ in pinout and physical footprint. The AUJZ designation specifies the 5-lead TSOT-23 package option within the broader product line.

Replacement Considerations

Direct functional replacements include other parts from the AD8538/AD8539 family such as the AD8538ARZ (8-lead SOIC) or AD8539 variants. Automotive qualified versions like the AD8538WAUJZ may be used if environmental robustness is required. Verify pin compatibility and thermal resistance differences when substituting packages.

FAQ

What is the maximum input offset voltage for the AD8538AUJZ-REEL7?

The maximum input offset voltage is 13 µV at 25°C and increases to 30 µV across the full operating temperature range of −40°C to +125°C.

Does the AD8538 support dual supply operation?

Yes, the device is fully specified for dual supply operation ranging from ±1.35 V to ±2.5 V, in addition to single supply operation from 2.7 V to 5.5 V.

What is the typical supply current per amplifier?

The typical supply current is 180 µA per amplifier at 5.0 V, with a maximum of 215 µA across the extended temperature range.