REF3440TIDBVR Equivalent & Substitute Parts

Part Overview

The REF3440TIDBVR is a Series Voltage Reference IC manufactured by Texas Instruments, classified as a Power Management (PMIC) component. This fixed 4.096V reference device operates with ±0.05% tolerance and delivers 10 mA output current in a surface-mount SOT-23-6 package. The device is currently Active in product status and is supplied in Tape & Reel (TR) packaging.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing options due to inventory constraints, supply chain considerations, or specific application qualifications such as automotive-grade certifications.

Substiute Parts

REF3440TIDBVR

Texas InstrumentsIn Stock: 2912REF3440TIDBVR Datasheet

Current PartRFQ

REF3440IDBVR

Texas InstrumentsIn Stock: 3174REF3440IDBVR Datasheet

Parametric EquivalentRFQ

REF3440QDBVRQ1

Texas InstrumentsIn Stock: 3370REF3440QDBVRQ1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REF3440TIDBVR are identified based on strict electrical and mechanical parameter equivalence within the REF34xx series. All substitute candidates maintain identical specifications across the following critical parameters:

• Fixed output voltage of 4.096V
• Output current rating of 10 mA
• Tolerance specification of ±0.05%
• Temperature coefficient of 6 ppm/°C
• Noise characteristics (0.1Hz to 10Hz: 3.8 µVp-p; 10Hz to 10kHz: 24 µVrms)
• Input voltage range of 4.596V ~ 12V
• Supply current of 95 µA
• Operating temperature range of -40°C ~ 125°C
• Surface-mount SOT-23-6 package configuration
• Moisture Sensitivity Level 2 (1 Year)

Substitutes differ only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel®), product qualification level (industrial versus automotive AEC-Q100), and compliance certifications (RoHS and REACH status). These differences do not affect electrical performance or functional compatibility in applications where the specified parameters are required.

Parameter Comparison

Engineering Selection Recommendations

All three parts—REF3440TIDBVR, REF3440IDBVR, and REF3440QDBVRQ1—are electrically and functionally equivalent for applications requiring a 4.096V fixed voltage reference with ±0.05% tolerance and 10 mA output capability.

REF3440TIDBVR is the primary part specification. It is Active in product status and supplied in standard Tape & Reel packaging. This part is suitable for general industrial applications.

REF3440IDBVR is a direct parametric equivalent offered in Cut Tape and Digi-Reel® packaging formats. This part carries ROHS3 compliance and REACH Unaffected status, making it suitable for applications with environmental compliance requirements. The alternative packaging format accommodates different procurement and assembly workflows.

REF3440QDBVRQ1 is an automotive-grade variant qualified to AEC-Q100 standards. This part is required for automotive applications, safety-critical systems, or designs subject to automotive supply chain qualification requirements. It carries ROHS3 compliance and REACH Unaffected status. The part is supplied in Tape & Reel packaging and maintains all electrical specifications identical to the industrial-grade variants.

Selection between these parts depends on application requirements: industrial applications use REF3440TIDBVR or REF3440IDBVR; automotive or AEC-Q100 qualified designs require REF3440QDBVRQ1. Packaging format selection (Tape & Reel versus Cut Tape & Digi-Reel®) is determined by assembly and procurement processes.

Frequently Asked Questions (FAQ)

Q: Are REF3440TIDBVR, REF3440IDBVR, and REF3440QDBVRQ1 electrically interchangeable?

A: Yes. All three parts deliver identical electrical performance: 4.096V fixed output, ±0.05% tolerance, 10 mA output current, 6 ppm/°C temperature coefficient, and equivalent noise characteristics. They operate across the same input voltage range (4.596V ~ 12V) and temperature range (-40°C ~ 125°C). Substitution is valid from an electrical standpoint.

Q: What is the difference between these three part numbers?

A: The primary differences are packaging format, product qualification level, and compliance certifications. REF3440TIDBVR is supplied in Tape & Reel format for industrial applications. REF3440IDBVR offers Cut Tape and Digi-Reel® packaging options with ROHS3 compliance. REF3440QDBVRQ1 is automotive-grade, AEC-Q100 qualified, and required for automotive applications. All three are Active products from Texas Instruments.

Q: Can I use REF3440QDBVRQ1 in place of REF3440TIDBVR?

A: Yes. REF3440QDBVRQ1 is a higher-grade variant with automotive qualification. It meets or exceeds all electrical specifications of REF3440TIDBVR and is electrically compatible. However, automotive-grade parts typically carry higher cost. Use REF3440QDBVRQ1 only when automotive qualification or AEC-Q100 compliance is required by design specifications.

Q: Can I use REF3440IDBVR in place of REF3440TIDBVR?

A: Yes. REF3440IDBVR is electrically identical and maintains all performance specifications. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Verify that your assembly process accommodates the alternative packaging format before substitution.

Q: What does AEC-Q100 qualification mean?

A: AEC-Q100 is an automotive industry qualification standard. REF3440QDBVRQ1 meets this standard, indicating the part has undergone automotive-grade testing and reliability validation. This qualification is required for automotive applications and safety-critical systems. Industrial applications do not require AEC-Q100 qualification.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel versus Cut Tape & Digi-Reel®) affects only procurement, storage, and assembly processes. Electrical performance and functional specifications remain identical regardless of packaging format.

Q: Are all three parts currently in stock?

A: Yes. REF3440TIDBVR has 2,848 pieces in stock, REF3440IDBVR has 3,127 pieces in stock, and REF3440QDBVRQ1 has 3,355 pieces in stock. Inventory levels are subject to change.

Q: What is Moisture Sensitivity Level (MSL) 2?

A: MSL 2 indicates the component can be stored in standard conditions for up to one year without requiring special moisture-control packaging. All three parts carry MSL 2 (1 Year) rating, meaning they have identical moisture sensitivity characteristics.

Q: Can these parts be used in high-precision analog applications?

A: Yes. All three parts are designed for precision voltage reference applications. The ±0.05% tolerance, 6 ppm/°C temperature coefficient, and low noise characteristics (3.8 µVp-p at 0.1Hz to 10Hz; 24 µVrms at 10Hz to 10kHz) make them suitable for high-precision analog circuits, data acquisition systems, and instrumentation applications.