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REF2930AIDBZR

3.0V voltage ref, 0.05%, 8ppm/C, 25uA, SOT-23-3

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Manufacturer Part：

REF2930AIDBZR

Package：

3-Pin SOT-23 (2.9 x 1.3 x 0.9 mm)

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Description

Product Overview

The REF2930AIDBZR is a Texas Instruments 3.0V precision voltage reference with 0.05% initial accuracy, 8ppm/C drift, and 25uA IQ. It features 4.5uVpp noise (0.1-10Hz) and 20mA output current capability. Packaged in SOT-23-3, -40C to +85C.

Key Specifications

Output 3.0 V fixed
Initial Accuracy 0.05%
Drift 8 ppm/C
IQ 25 uA
Noise 4.5 uVpp (0.1-10Hz)
Iout 20 mA

Features

  • 3.0V fixed output
  • 0.05% initial accuracy
  • 8ppm/C temperature drift
  • 25uA supply current
  • 4.5uVpp low noise
  • 20mA output current
  • SOT-23-3 package

Applications

  • Precision ADC/DAC reference
  • Instrumentation reference
  • Low-power sensor bias
  • Medical equipment reference

The REF2930AIDBZR is a Texas Instruments precision 3.0V voltage reference in a SOT-23-3 package, offering 0.05% initial accuracy and 8ppm/C temperature drift for high-precision analog applications. The 25uA quiescent current makes it suitable for battery-powered and always-on systems where power budget is critical. The 4.5uVpp noise (0.1Hz to 10Hz) ensures clean reference voltage for high-resolution ADCs and DACs. The device can source up to 20mA output current, sufficient for driving reference inputs of multiple converters without external buffering. The REF2930 uses a curvature-corrected bandgap architecture with chopper-stabilized amplifier for low drift and high initial accuracy. No external bypass capacitor is required for stability, though a 0.1uF capacitor improves noise performance. The A-grade offers 0.05% accuracy; standard grade offers 0.1%. Packaged in SOT-23-3 rated for -40C to +85C.

The REF2930 uses a precision bandgap voltage reference core with chopper-stabilized amplifier. The bandgap core generates a stable 1.2V reference by combining the complementary temperature coefficients of a base-emitter voltage (negative TC) and a PTAT (proportional to absolute temperature) voltage (positive TC). Chopper stabilization periodically auto-zeros the amplifier offset, reducing the offset drift to sub-microvolt levels and enabling the 8ppm/C overall temperature coefficient. A resistive divider and output buffer amplifier scale the 1.2V bandgap to the 3.0V output with 0.05% accuracy. The output stage can source up to 20mA with minimal load regulation error. The 25uA supply current is achieved through careful biasing of the bandgap core and output amplifier. The device does not require a bypass capacitor for stability, unlike many shunt references.

Pin Mnemonic Description
1 VIN Input supply (3.3V to 18V)
2 GND Ground
3 VOUT 3.0V reference output
  • High-resolution 16-bit ADC reference supply with 0.05% accuracy and 8ppm/C drift
  • Precision instrumentation measurement bridge excitation with 4.5uVpp noise
  • Low-power sensor bias voltage with 25uA IQ in battery-powered systems
  • Medical device calibration reference requiring 3.0V with 20mA drive capability
Model Manufacturer Key Difference
REF2920AIDBZR TI 2.048V version
REF3030AIDBZR TI 3.0V, different series
LM4140 TI Similar precision ref
ADR3430 ADI 3.0V, similar spec
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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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