REF3225AIDBVT Equivalent & Substitute Parts

Part Overview

The REF3225AIDBVT is a Series Voltage Reference IC manufactured by Texas Instruments, providing a fixed 2.5V output with ±0.2% tolerance in a SOT-23-6 surface mount package. This device is classified as Not For New Designs, indicating it has been superseded in the product lifecycle. Finding equivalent or substitute parts is necessary for applications requiring continued supply, design updates, or performance improvements while maintaining functional compatibility.

Substiute Parts

REF3225AIDBVT

Texas InstrumentsIn Stock: 7414REF3225AIDBVT Datasheet

Current PartRFQ

REF3425IDBVR

Texas InstrumentsIn Stock: 31576REF3425IDBVR Datasheet

MFR RecommendedRFQ

REF3225AIDBVR

Texas InstrumentsIn Stock: 19703REF3225AIDBVR Datasheet

Parametric EquivalentRFQ

MAX6071AAUT25+T

Analog Devices Inc./Maxim IntegratedIn Stock: 22739MAX6071AAUT25+T Datasheet

MFR RecommendedRFQ

MAX6071BAUT25+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1582MAX6071BAUT25+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REF3225AIDBVT is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Output Voltage: 2.5V (fixed)
• Output Current: 10 mA minimum
• Package / Case: SOT-23-6 (physical and electrical compatibility)
• Operating Temperature Range: -40°C ~ 125°C
• Mounting Type: Surface Mount

Performance Parameters (Allowable Variation):

• Voltage Tolerance: ±0.2% or better
• Temperature Coefficient: 20 ppm/°C or better
• Input Voltage Range: Must encompass or exceed 2.55V ~ 5.5V
• Supply Current: 135 µA or lower preferred for power efficiency

Substitute parts are grouped into two categories:

Category 1: Parametric Equivalents – Parts with identical or near-identical electrical specifications, differing only in packaging variant or product status.

Category 2: Functional Upgrades – Parts with superior performance characteristics (lower tolerance, lower temperature coefficient, lower noise) while maintaining all mandatory compatibility parameters.

Parameter Comparison

Engineering Selection Recommendations

REF3225AIDBVR (Parametric Equivalent)

The REF3225AIDBVR is a direct parametric equivalent to the REF3225AIDBVT, differing only in packaging variant (Digi-Reel vs. Cut Tape). Both parts share identical electrical specifications and are classified as Not For New Designs. This substitute is suitable for direct replacement in existing designs where supply continuity is required. However, for new design initiatives, superior alternatives are available.

REF3425IDBVR (Manufacturer Recommended Upgrade)

The REF3425IDBVR is the manufacturer-recommended upgrade path from the REF3225AIDBVT. This part maintains all mandatory compatibility parameters while delivering superior performance: voltage tolerance improves from ±0.2% to ±0.05%, temperature coefficient reduces from 20 ppm/°C to 6 ppm/°C, and noise performance improves significantly. The REF3425IDBVR is classified as Active, ensuring long-term availability. Input voltage range extends to 12V, and supply current reduces to 95 µA. This part is recommended for new designs and performance-critical applications.

MAX6071AAUT25+T (High-Performance Alternative)

The MAX6071AAUT25+T from Analog Devices Inc./Maxim Integrated provides the highest performance specification among available substitutes. Voltage tolerance reaches ±0.04%, temperature coefficient is 6 ppm/°C, and noise performance is exceptional at 4.8 µVp-p (0.1Hz-10Hz) and 6 µVrms (10Hz-10kHz). The part is classified as Active with MSL rating of 1 (Unlimited), indicating superior moisture handling. Trade-off: supply current is 300 µA, higher than the original design. This substitute is suitable for precision measurement and low-noise applications.

MAX6071BAUT25+T (Balanced Alternative)

The MAX6071BAUT25+T offers a middle-ground performance profile with voltage tolerance of ±0.08%, temperature coefficient of 8 ppm/°C, and noise specifications matching the MAX6071AAUT25+T. This part is Active with MSL rating of 1 (Unlimited). Supply current is 300 µA. This substitute provides improved performance over the original REF3225AIDBVT at a lower cost than the MAX6071AAUT25+T variant.

Frequently Asked Questions (FAQ)

Q: Can I use REF3225AIDBVR as a direct replacement for REF3225AIDBVT?

A: Yes. Both parts are parametrically identical with ±0.2% tolerance, 20 ppm/°C temperature coefficient, and identical electrical specifications. The difference is packaging format (Cut Tape vs. Digi-Reel). Direct PCB-level substitution is possible without circuit modification.

Q: Why should I consider REF3425IDBVR instead of REF3225AIDBVR?

A: The REF3425IDBVR is the active product in the Texas Instruments reference voltage portfolio. It provides superior specifications (±0.05% tolerance vs. ±0.2%, 6 ppm/°C vs. 20 ppm/°C) while maintaining SOT-23-6 package compatibility. For new designs, the REF3425IDBVR ensures long-term supply availability and improved performance.

Q: Are the MAX6071 parts compatible with my existing PCB layout?

A: Yes. Both MAX6071AAUT25+T and MAX6071BAUT25+T use SOT-23-6 packaging, identical to the REF3225AIDBVT. PCB footprints are compatible. However, verify that your power supply can accommodate the higher supply current (300 µA vs. 135 µA for the original design).

Q: What is the difference between MAX6071AAUT25+T and MAX6071BAUT25+T?

A: Both parts share identical package, pinout, and noise specifications. The primary difference is voltage tolerance: MAX6071AAUT25+T specifies ±0.04% while MAX6071BAUT25+T specifies ±0.08%. Temperature coefficient is 6 ppm/°C for MAX6071AAUT25+T and 8 ppm/°C for MAX6071BAUT25+T. Select MAX6071AAUT25+T for precision applications; MAX6071BAUT25+T for general-purpose applications.

Q: Can I use these substitutes in applications requiring extended input voltage range?

A: The REF3425IDBVR supports input voltage from 3V to 12V, exceeding the original REF3225AIDBVT range (2.55V to 5.5V). The MAX6071 series supports 2.8V to 5.5V. Verify your application's input voltage requirements against each substitute's specification before selection.

Q: What is the impact of higher supply current in the MAX6071 series?

A: The MAX6071AAUT25+T and MAX6071BAUT25+T draw 300 µA compared to 135 µA for the REF3225AIDBVT. In battery-powered or power-constrained applications, this increased current consumption may impact system power budget. Evaluate total system power requirements before substitution.

Q: Are all these parts RoHS compliant?

A: Yes. All listed parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.