REF3120AIDBZRG4 Equivalent & Substitute Parts

Part Overview

The REF3120AIDBZRG4 is a series voltage reference IC from Texas Instruments, delivering a fixed 2.048V 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 supports input voltages from 2.098V to 5.5V with a maximum output current of 10 mA.

Substiute Parts

REF3120AIDBZRG4

Texas InstrumentsIn Stock: 6679REF3120AIDBZRG4 Datasheet

Current PartRFQ

REF3120AIDBZR

Texas InstrumentsIn Stock: 17246REF3120AIDBZR Datasheet

MFR RecommendedRFQ

REF3120AIDBZT

Texas InstrumentsIn Stock: 1915REF3120AIDBZT Datasheet

Parametric EquivalentRFQ

REF3120AQDBZRQ1

Texas InstrumentsIn Stock: 2163REF3120AQDBZRQ1 Datasheet

Parametric EquivalentRFQ

ISL21080CIH320Z-TK

Renesas Electronics CorporationIn Stock: 1694ISL21080CIH320Z-TK Datasheet

MFR RecommendedRFQ

ISL60002BIH320Z-T7A

Renesas Electronics CorporationIn Stock: 1463ISL60002BIH320Z-T7A Datasheet

MFR RecommendedRFQ

MAX6018AEUR21+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3442MAX6018AEUR21+T Datasheet

MFR RecommendedRFQ

MAX6018BEUR21+T

Analog Devices Inc./Maxim IntegratedIn Stock: 5222MAX6018BEUR21+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REF3120AIDBZRG4 is determined by the following critical parameters:

• Fixed output voltage of 2.048V
• Tolerance specification of ±0.2% or better
• SOT-23-3 package compatibility
• Surface mount mounting type
• Operating temperature range support

Substitute parts are grouped into two categories:

Direct Equivalents (Texas Instruments REF3120 Series): Parts REF3120AIDBZR and REF3120AIDBZT maintain identical electrical specifications and package format. REF3120AQDBZRQ1 provides automotive-grade qualification with AEC-Q100 certification, suitable for applications requiring automotive compliance.

Cross-Manufacturer Alternatives: Parts from Renesas Electronics (ISL21080CIH320Z-TK, ISL60002BIH320Z-T7A) and Analog Devices/Maxim Integrated (MAX6018AEUR21+T, MAX6018BEUR21+T) deliver the same 2.048V fixed output in identical packaging. These alternatives differ in tolerance, temperature coefficient, supply current, and operating temperature range, requiring evaluation against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: REF3120AIDBZR is the primary substitute, offering identical electrical and thermal specifications with active product status and higher inventory availability (17,200 pcs). REF3120AIDBZT provides equivalent performance with lower inventory (1,883 pcs). Both maintain the original ±0.2% tolerance and 20ppm/°C temperature coefficient.

For Automotive Applications: REF3120AQDBZRQ1 is qualified to AEC-Q100 automotive standards with active status. This part maintains all electrical specifications of the original while providing automotive-grade reliability assurance.

For Low-Power Applications: ISL60002BIH320Z-T7A from Renesas delivers superior tolerance (±0.05%) and significantly reduced supply current (900nA versus 135µA), suitable for battery-powered or ultra-low-power designs. Operating temperature is limited to -40°C to 85°C.

For General-Purpose Substitution: MAX6018AEUR21+T from Analog Devices/Maxim maintains ±0.2% tolerance with substantially lower supply current (6µA). Output current is limited to 1 mA, requiring verification against load requirements.

All substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's environmental compliance status.

Frequently Asked Questions (FAQ)

Q: Can REF3120AIDBZR directly replace REF3120AIDBZRG4?

A: Yes. REF3120AIDBZR is electrically and mechanically identical, with the same 2.048V output, ±0.2% tolerance, 10 mA output current, and SOT-23-3 package. The primary difference is product status: REF3120AIDBZR is active while REF3120AIDBZRG4 is obsolete.

Q: What is the difference between REF3120AIDBZR and REF3120AQDBZRQ1?

A: REF3120AQDBZRQ1 includes automotive-grade qualification (AEC-Q100) and carries a higher moisture sensitivity level (MSL 2 versus MSL 1). Electrical specifications are identical. Select REF3120AQDBZRQ1 for automotive applications requiring AEC-Q100 certification.

Q: Can ISL21080CIH320Z-TK replace the original part in all applications?

A: ISL21080CIH320Z-TK shares the 2.048V output and SOT-23-3 package but differs in tolerance (±0.3% versus ±0.2%), output current (7 mA versus 10 mA), and operating temperature range (-40°C to 85°C versus -40°C to 125°C). Verify application requirements for tolerance and temperature range compatibility.

Q: Why does ISL60002BIH320Z-T7A have lower supply current?

A: ISL60002BIH320Z-T7A is designed for ultra-low-power applications, consuming only 900nA supply current compared to 135µA in the original. This comes with reduced output current (7 mA) and operating temperature range (-40°C to 85°C). Select this part only if low power consumption is a design requirement.

Q: Are all substitute parts available in the same packaging?

A: Yes. All listed substitutes use the SOT-23-3 package (TO-236-3, SC-59). Packaging format differs by part number (Cut Tape, Digi-Reel, or Tape & Reel), but the physical component package remains identical.

Q: Which substitute offers the best tolerance specification?

A: ISL60002BIH320Z-T7A provides ±0.05% tolerance, superior to the original ±0.2%. REF3120AIDBZR and MAX6018AEUR21+T match the original ±0.2% tolerance. ISL21080CIH320Z-TK and MAX6018BEUR21+T have looser tolerances (±0.3% and ±0.4% respectively).

Q: Can MAX6018AEUR21+T handle the same output current as the original?

A: No. MAX6018AEUR21+T is limited to 1 mA output current versus 10 mA in REF3120AIDBZRG4. Verify that your application load does not exceed 1 mA before selecting this part.