PACKAGE REFERENCESOT-23-5Confirm case, pinout and ordering suffix before purchase.

MANUFACTURER PART RECORD

REF2033AIDDCR

REF2033AIDDCR is a Texas Instruments dual-output series voltage reference in 5-pin SOT-23 — for ADC systems that need both a reference and a mid-supply bias from one part: data-acquisition front ends and sensor interfaces. A main VREF output plus a half-scale (VREF/2) bias output, low drift, low power, enable pin. The dual-output architecture is the selection point: the VREF/2 output directly biases single-supply op-amp stages and ADC common-mode pins, eliminating the resistor divider and buffer that discrete solutions require. Selection advice: this is the REF2033 member of the REF20xx family on this site — pick it where its output pair matches the rail plan; the REF2025/REF2030/REF2041 are the other family members. Against the shunt LM4040 on this site, the series REF2033 suits battery-powered designs where quiescent current matters. The AIDDCR code is the SOT-23-5 reel. Parameters verified against Texas Instruments documentation.

Analog ICsVoltage referenceSOT-23-5

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MPN: REF2033AIDDCR
Manufacturer: Texas Instruments
Family: Voltage reference
Package: SOT-23-5
Manufacturer channel coverage: Checked by RFQ
Data last checked: Commercial check required
Required order checks: Suffix, package, date code, lot, source and traceability

PROCUREMENT DATA

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MANUFACTURER DATA REVIEW

Key technical specifications

Ordering-code highlights reviewed against official manufacturer documentation.

Function: Dual-output voltage reference · VREF and VREF/2 (VBIAS) outputs with matched specifications
Output voltages (REF2033): VREF 3.3 V / VBIAS 1.65 V nominal
Initial accuracy: ±0.05% maximum at 25°C · both outputs
Temperature coefficient: ±3 ppm/°C typical / ±8 ppm/°C maximum · −40°C to +125°C, box method
Line / load regulation: 3 ppm/V typical (35 ppm/V maximum) / 8 ppm/mA typical (20 ppm/mA maximum) sourcing 0 mA to 20 mA
Dropout voltage: 10 mV typical / 20 mV maximum at light load · up to 600 mV maximum at IL = 20 mA
Supply current: 360 µA typical / 430 µA maximum in active mode (460 µA maximum over −40°C to +125°C); shutdown (EN = 0) 3.3 µA typical / 5 µA maximum
Input voltage range: VREF + 0.02 V minimum to 5.5 V maximum · at IL = 0 mA
Low-frequency noise: 12 ppm peak-to-peak typical · 0.1 Hz to 10 Hz
Order-code package: SOT-23-5 (DDC) · REF2033 device marking GAEM; DDCR is the large reel, DDCT the small reel of the same device
Manufacturer packing: Large tape and reel, 3,000 (AIDDCR); small reel 250 (AIDDCT) · packing quantities, not stock or MOQ

Source: TI SBOS600F (REF20xx family) · §4 Device Comparison Table, §6.3 Recommended Operating Conditions, §6.5 Electrical Characteristics; Package Option Addendum · Reviewed 2026-10-30

Sourcing note

Confirm electrical grade, package, reel quantity and circuit requirements before substitution.

Before you request a quote

Confirm the family member by output voltage
REF2025, REF2030, REF2033 and REF2041 share the SOT-23-5 package and the AIDDCR/AIDDCT order pattern and differ only in output voltage (2.5/1.25 V, 3.0/1.5 V, 3.3/1.65 V, 4.096/2.048 V). Match the full code, and note R vs T is only the reel size.
Check headroom at the real load current
Dropout is 10 mV typical at light load but the table allows up to 600 mV maximum at the full 20 mA output. Verify VIN headroom at your actual load, not the headline value.

Official documentation

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Open official datasheet Manufacturer product page

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RELATED REFERENCES

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Browse existing catalog records — same series first, then the same category and manufacturer. These are not confirmed replacements; compatibility requires engineering review.

COMMON QUESTIONS

REF2033AIDDCR FAQ

What are the key specifications of REF2033AIDDCR?

From the verified technical profile: Function: Dual-output voltage reference · VREF and VREF/2 (VBIAS) outputs with matched specifications; Output voltages (REF2033): VREF 3.3 V / VBIAS 1.65 V nominal; Initial accuracy: ±0.05% maximum at 25°C · both outputs. These are the catalog-recorded values for REF2033AIDDCR — always re-check them against the manufacturer datasheet revision quoted on your BOM before finalizing the design.