REF1112AIDBZTG4 Equivalent & Substitute Parts

Part Overview

The REF1112AIDBZTG4 is a shunt voltage reference IC from Texas Instruments, delivering a fixed 1.25V output with ±0.2% tolerance in a SOT-23-3 surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across -40°C to 125°C and is suitable for precision voltage reference applications requiring low noise and minimal supply current.

Substiute Parts

REF1112AIDBZTG4

Texas InstrumentsIn Stock: 23534REF1112AIDBZTG4 Datasheet

Current PartRFQ

REF1112AIDBZT

Texas InstrumentsIn Stock: 2090REF1112AIDBZT Datasheet

MFR RecommendedRFQ

REF1112AIDBZR

Texas InstrumentsIn Stock: 20336REF1112AIDBZR Datasheet

Parametric EquivalentRFQ

MAX6006AEUR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2067MAX6006AEUR+T Datasheet

MFR RecommendedRFQ

MAX6006BEUR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2107MAX6006BEUR+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the REF1112AIDBZTG4 is determined by the following critical parameters:

• Reference Type & Output Type: Must be Shunt type with Fixed output
• Output Voltage: Must be 1.25V
• Package: Must be SOT-23-3 (TO-236-3, SC-59)
• Tolerance & Temperature Coefficient: Determines precision class and thermal stability
• Output Current & Cathode Current: Defines operating point and supply requirements
• Operating Temperature Range: Must support -40°C to 125°C minimum
• Compliance: RoHS3 and MSL-1 required

Substitute parts are grouped into two categories:

Category 1 - Direct Equivalents (Texas Instruments REF1112 Series): REF1112AIDBZT and REF1112AIDBZR maintain identical electrical specifications to the main part, differing only in product status and packaging format.

Category 2 - Parametric Equivalents (Analog Devices MAX6006 Series): MAX6006AEUR+T and MAX6006BEUR+T provide the same 1.25V fixed output and SOT-23-3 package but with reduced output current (2 mA vs. 5 mA), higher temperature coefficients, and narrower operating temperature range (-40°C to 85°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): REF1112AIDBZT and REF1112AIDBZR are the primary substitutes. Both are active products from Texas Instruments with identical electrical specifications to the obsolete REF1112AIDBZTG4. REF1112AIDBZT is available in Cut Tape (CT) & Digi-Reel® packaging, while REF1112AIDBZR offers the same specifications with higher inventory availability (20,310 pcs). Both maintain full compliance with RoHS3 and MSL-1 requirements.

For Parametric Substitution: MAX6006AEUR+T and MAX6006BEUR+T from Analog Devices Inc./Maxim Integrated are suitable when output current requirements are reduced to 2 mA. These parts maintain the 1.25V fixed output and SOT-23-3 package but operate within a narrower temperature range (-40°C to 85°C). MAX6006AEUR+T preserves the ±0.2% tolerance and lower temperature coefficient (30ppm/°C), while MAX6006BEUR+T has relaxed tolerance (±0.5%) and higher temperature coefficient (75ppm/°C). Both are RoHS3 compliant and MSL-1 rated.

Selection should prioritize REF1112 series parts for applications requiring the full -40°C to 125°C operating range and 5 mA output current. MAX6006 series parts are suitable only when the application can operate within -40°C to 85°C and requires no more than 2 mA output current.

Frequently Asked Questions (FAQ)

Q: Can REF1112AIDBZT directly replace REF1112AIDBZTG4?

A: Yes. REF1112AIDBZT is a direct equivalent with identical electrical specifications. The primary difference is product status: REF1112AIDBZTG4 is obsolete while REF1112AIDBZT is active. Both deliver 1.25V at 5 mA with ±0.2% tolerance, 15ppm/°C temperature coefficient, and operate across -40°C to 125°C in SOT-23-3 packaging.

Q: What are the key differences between REF1112 and MAX6006 series?

A: The REF1112 series outputs 5 mA maximum current with 15ppm/°C temperature coefficient and operates to 125°C. The MAX6006 series outputs 2 mA maximum current with higher temperature coefficients (30ppm/°C for MAX6006A, 75ppm/°C for MAX6006B) and operates only to 85°C. Both share the same 1.25V output voltage, SOT-23-3 package, and ±0.2% tolerance (MAX6006A only; MAX6006B is ±0.5%).

Q: Is the SOT-23-3 package identical across all substitutes?

A: Yes. All listed substitutes use the SOT-23-3 package (also designated TO-236-3 or SC-59). Pin configuration and footprint are identical, allowing direct PCB substitution without layout changes.

Q: Can MAX6006BEUR+T replace REF1112AIDBZTG4 in all applications?

A: No. MAX6006BEUR+T has three limiting factors: reduced output current (2 mA vs. 5 mA), relaxed tolerance (±0.5% vs. ±0.2%), and narrower operating temperature range (-40°C to 85°C vs. -40°C to 125°C). Use only when the application can operate within these constraints.

Q: Are all substitutes RoHS3 and MSL-1 compliant?

A: Yes. All listed substitutes maintain RoHS3 compliance and MSL-1 (Unlimited) moisture sensitivity level, matching the compliance profile of the REF1112AIDBZTG4.

Q: What is the inventory status of available substitutes?

A: REF1112AIDBZR has the highest availability (20,310 pcs), followed by REF1112AIDBZT (2,058 pcs), MAX6006BEUR+T (2,015 pcs), and MAX6006AEUR+T (2,000 pcs). The original REF1112AIDBZTG4 has 23,471 pcs in stock but is obsolete.