REF3312AIDBZRG4 Equivalent & Substitute Parts

Part Overview

The REF3312AIDBZRG4 is a series voltage reference IC manufactured by Texas Instruments, designed to provide a fixed 1.25V output with ±0.15% tolerance in a compact SOT-23-3 surface mount package. This component is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity. The part operates across a wide input voltage range of 1.7V to 5.5V and delivers up to 30 mA output current, making it suitable for precision analog applications requiring stable reference voltages.

Substiute Parts

REF3312AIDBZRG4

Texas InstrumentsIn Stock: 2999REF3312AIDBZRG4 Datasheet

Current PartRFQ

REF3312AIDBZR

Texas InstrumentsIn Stock: 22678REF3312AIDBZR Datasheet

MFR RecommendedRFQ

REF3312AIDBZT

Texas InstrumentsIn Stock: 2175REF3312AIDBZT Datasheet

Parametric EquivalentRFQ

ISL60002DIH312Z-T7A

Renesas Electronics CorporationIn Stock: 3599ISL60002DIH312Z-T7A Datasheet

MFR RecommendedRFQ

MAX6101EUR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 6640MAX6101EUR+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the REF3312AIDBZRG4 is determined by the following critical parameters: fixed output voltage of 1.25V, SOT-23-3 package compatibility, and surface mount mounting type. The substitute parts are grouped into two categories based on electrical performance alignment:

Category 1 - Direct Parametric Equivalents (Texas Instruments REF3312 Series): These parts maintain identical electrical specifications including ±0.15% tolerance, 30 mA output current, 30ppm/°C temperature coefficient, and 1.7V to 5.5V input range. Differences exist only in packaging format (Cut Tape vs. Digi-Reel) and product status (Active vs. Obsolete).

Category 2 - Functional Equivalents (Alternative Manufacturers): These parts provide the same 1.25V fixed output and SOT-23-3 package but with relaxed tolerance specifications (±0.4%), reduced output current capability (5-7 mA), and modified input voltage ranges. These are suitable for applications where the primary requirement is 1.25V reference generation without demanding the full 30 mA output capacity or ±0.15% precision.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Choice): REF3312AIDBZR is the manufacturer-recommended substitute, maintaining identical electrical specifications and operating temperature range (-40°C to 125°C). This part is in active production status with significantly higher inventory availability (22,601 pcs vs. 2,927 pcs for the obsolete REF3312AIDBZRG4). Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications, ensuring regulatory continuity.

REF3312AIDBZT provides identical electrical performance and is also in active production status. Selection between REF3312AIDBZR and REF3312AIDBZT depends solely on packaging format requirements (Cut Tape & Digi-Reel vs. alternative packaging).

For Applications with Relaxed Output Current Requirements: ISL60002DIH312Z-T7A (Renesas) and MAX6101EUR+T (Analog Devices/Maxim) are functional alternatives when output current demand does not exceed 7 mA and 5 mA respectively. Both maintain the 1.25V fixed output and SOT-23-3 package. ISL60002DIH312Z-T7A offers superior temperature coefficient (20ppm/°C) and lower supply current (900nA), while MAX6101EUR+T provides extended input voltage range (2.5V to 12.6V) and lower noise floor (13µVp-p). However, both parts operate only to 85°C maximum temperature and have relaxed tolerance specifications (±0.4%).

Frequently Asked Questions (FAQ)

Q: Can REF3312AIDBZR directly replace REF3312AIDBZRG4 without circuit modification?

A: Yes. REF3312AIDBZR is electrically and mechanically identical to REF3312AIDBZRG4. Both parts feature the same 1.25V output, ±0.15% tolerance, 30 mA output current, SOT-23-3 package, and -40°C to 125°C operating range. The only difference is product status (Active vs. Obsolete) and packaging format options.

Q: What are the key differences between REF3312AIDBZR and ISL60002DIH312Z-T7A?

A: The primary differences are output current capability (30 mA vs. 7 mA), tolerance specification (±0.15% vs. ±0.4%), and maximum operating temperature (125°C vs. 85°C). ISL60002DIH312Z-T7A is suitable only for applications requiring less than 7 mA output current and operating below 85°C. The REF3312AIDBZR maintains full performance specifications across the extended temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (REF3312AIDBZR, REF3312AIDBZT, ISL60002DIH312Z-T7A, and MAX6101EUR+T) are ROHS3 compliant with REACH Unaffected status, matching the compliance profile of the original REF3312AIDBZRG4.

Q: Can MAX6101EUR+T be used in applications requiring the full -40°C to 125°C temperature range?

A: No. MAX6101EUR+T is rated only to 85°C maximum operating temperature, making it unsuitable for applications requiring operation above 85°C. For full temperature range support, use REF3312AIDBZR or REF3312AIDBZT.

Q: What is the impact of using a substitute with ±0.4% tolerance instead of ±0.15%?

A: Applications requiring precision voltage reference accuracy of ±0.15% must use REF3312AIDBZR or REF3312AIDBZT. Substitutes with ±0.4% tolerance (ISL60002DIH312Z-T7A and MAX6101EUR+T) introduce three times greater tolerance variation and are suitable only for applications with relaxed accuracy requirements.