ADR3533WARMZ-R7

Overview

The ADR3533WARMZ-R7 is a micropower, high-accuracy CMOS voltage reference with a nominal output of 3.3 V. It features an initial output voltage error of ±0.1% and a maximum temperature coefficient of 8 ppm/°C (A grade) or 5 ppm/°C (B grade). The device operates over an input voltage range of 3.5 V to 5.5 V and supports an operating temperature range from −40°C to +125°C. Quiescent current is typically 85 μA in normal operation and drops to 5 μA in shutdown mode. It provides an output current capacity of +10 mA source and −3 mA sink, with low dropout voltage characteristics.

Feature Summary

• Utilizes proprietary DigiTrim technology for digital trimming of output voltage and temperature coefficient during final assembly.
• Features low long-term drift and low output voltage hysteresis to improve lifetime system accuracy.
• Includes an enable pin that allows for power-down control with minimal quiescent current consumption.
• Qualified for automotive applications and available in an 8-lead MSOP package.

Applications

• Automotive battery monitors
• Portable instrumentation
• Process transmitters
• Remote sensors
• Medical instrumentation

Procurement Notes

Verify the specific grade (A or B) required for your application, as the temperature coefficient varies between 8 ppm/°C and 5 ppm/°C. Confirm the suffix R7 indicates reel packaging when ordering. Ensure the input voltage supply remains within the specified 3.5 V to 5.5 V range for proper regulation. Check for automotive qualification requirements if deploying in vehicle systems.

Selection Notes

Select this component when a stable 3.3 V reference is needed with low power consumption and high precision. Consider the A grade for standard applications requiring 8 ppm/°C TC, or the B grade for tighter thermal stability needs. Evaluate the 10 mA sourcing capability against load requirements. The low noise and drift make it suitable for sensitive analog front ends.

Part Context

This part belongs to the ADR35xx family of micropower voltage references, which includes models with outputs of 2.5 V, 3.0 V, 4.096 V, and 5.0 V. All members share similar architectural benefits, including CMOS construction, DigiTrim calibration, and automotive qualification. The WARMZ suffix denotes the specific 3.3 V output variant in the 8-lead MSOP package with reel packaging.

Replacement Considerations

Direct substitutes within the same family include ADR3525WARMZ-R7 (2.5 V), ADR3530WARMZ-R7 (3.0 V), ADR3540WARMZ-R7 (4.096 V), and ADR3550WARMZ-R7 (5.0 V). Verify that the replacement maintains the required output voltage and temperature coefficient grade.