REF3140AIDBZR Equivalent & Substitute Parts

Part Overview

The REF3140AIDBZR is a series voltage reference IC manufactured by Texas Instruments, designed for precision analog applications requiring a fixed 4.096V output. This Surface Mount device operates across -40°C to 125°C and delivers 10 mA output current with ±0.2% tolerance. The part is Active status and ROHS3 compliant, making it suitable for modern electronic designs. Equivalent and substitute parts are identified when design requirements change, supply constraints occur, or when alternative performance characteristics better match application needs.

Key Parameters

Parameter	Value
Manufacturer Part Number	REF3140AIDBZR
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Reference Type	Series
Output Type	Fixed
Voltage - Output (Fixed)	4.096V
Current - Output	10 mA
Tolerance	±0.2%
Temperature Coefficient	20ppm/°C
Voltage - Input Range	4.146V ~ 5.5V
Current - Supply	135µA
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the REF3140AIDBZR are classified based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

Fixed output voltage of 4.096V
SOT-23-3 package compatibility
±0.2% tolerance (or tighter)
20ppm/°C temperature coefficient
Surface Mount mounting type
Active product status

Grouping Logic:

Group 1: Direct Parametric Equivalents (Texas Instruments REF3140 Series) Parts REF3140AIDBZT and REF3140AQDBZRQ1 maintain identical electrical specifications to the main part. Differences are limited to packaging format (Cut Tape vs. Tape & Reel) and automotive qualification status.

Group 2: Functional Equivalents with Output Current Variation (Analog Devices MAX6064 Series) Parts MAX6064AEUR+T and MAX6064BEUR+T provide 4.096V fixed output in SOT-23-3 package with ±0.2% and ±0.4% tolerance respectively. Output current is reduced to 5 mA. These parts operate across -40°C to 85°C and accept wider input voltage range (4.296V ~ 12.6V).

Group 3: Higher Output Current Alternative (Analog Devices MAX6041 Series) Part MAX6041AEUR+T delivers 4.096V output with 500 µA capability, suitable for applications requiring higher load current than standard 10 mA references.

Group 4: Ultra-Precision Alternative (Xicor X60003CIG3Z-41T1) Part X60003CIG3Z-41T1 provides 4.096V output with superior ±0.06% tolerance and 10 mA output current. Input voltage range is 4.5V ~ 9V with significantly lower supply current (900nA).

Parameter Comparison

Parameter	REF3140AIDBZR	REF3140AIDBZT	REF3140AQDBZRQ1	MAX6041AEUR+T	MAX6064AEUR+T	MAX6064BEUR+T	X60003CIG3Z-41T1
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Xicor-Division of Intersil
Voltage - Output (Fixed)	4.096V	4.096V	4.096V	4.096V	4.096V	4.096V	4.096V
Current - Output	10 mA	10 mA	10 mA	500 µA	5 mA	5 mA	10 mA
Tolerance	±0.2%	±0.2%	±0.2%	±0.2%	±0.2%	±0.4%	±0.06%
Temperature Coefficient	20ppm/°C	20ppm/°C	20ppm/°C	20ppm/°C	20ppm/°C	30ppm/°C	20ppm/°C
Noise - 0.1Hz to 10Hz	53µVp-p	53µVp-p	53µVp-p	100µVp-p	50µVp-p	50µVp-p	30µVp-p
Noise - 10Hz to 10kHz	78µVrms	78µVrms	78µVrms	200µVrms	50µVrms	50µVrms	—
Voltage - Input Range	4.146V ~ 5.5V	4.146V ~ 5.5V	4.146V ~ 5.5V	4.296V ~ 12.6V	4.296V ~ 12.6V	4.296V ~ 12.6V	4.5V ~ 9V
Current - Supply	135µA	135µA	135µA	35µA	125µA	125µA	900nA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Product Status	Active	Active	Active	Active	Active	Active	Active
Qualification	Standard	Standard	AEC-Q100 Automotive	Standard	Standard	Standard	Standard

Engineering Selection Recommendations

REF3140AIDBZT: Direct substitute for REF3140AIDBZR with identical electrical performance. Differs only in packaging format (Cut Tape vs. Tape & Reel). Select when packaging preference or inventory availability aligns with this variant.

REF3140AQDBZRQ1: Direct electrical equivalent with AEC-Q100 automotive qualification. Maintains all performance specifications of the main part. Select for automotive applications or when automotive-grade components are required by design specification.

MAX6041AEUR+T: Suitable when output current requirement is reduced to 500 µA. Provides wider input voltage acceptance (4.296V ~ 12.6V) and lower supply current (35µA). Operating temperature limited to -40°C to 85°C. Select for low-power applications where extended input voltage range is beneficial.

MAX6064AEUR+T: Applicable when output current can be reduced to 5 mA. Maintains ±0.2% tolerance and 20ppm/°C temperature coefficient. Accepts wider input voltage range (4.296V ~ 12.6V). Operating temperature limited to -40°C to 85°C. Select when lower output current meets application requirements.

MAX6064BEUR+T: Suitable when tolerance relaxation to ±0.4% is acceptable and output current requirement is 5 mA. Temperature coefficient increases to 30ppm/°C. Operating temperature limited to -40°C to 85°C. Select for cost-optimized designs where tighter tolerance is not critical.

X60003CIG3Z-41T1: Select for ultra-precision applications requiring ±0.06% tolerance. Delivers 10 mA output current with significantly lower supply current (900nA). Input voltage range is 4.5V ~ 9V. Operating temperature limited to -40°C to 85°C. Superior noise performance (30µVp-p, 0.1Hz to 10Hz) makes this suitable for high-resolution analog signal conditioning.

Frequently Asked Questions (FAQ)

Q: Can REF3140AIDBZT be used as a direct replacement for REF3140AIDBZR?

A: Yes. REF3140AIDBZT is a direct parametric equivalent with identical electrical specifications. The only difference is packaging format: REF3140AIDBZR is supplied in Cut Tape (CT) & Digi-Reel format, while REF3140AIDBZT is Cut Tape only. Both maintain the same performance across all critical parameters.

Q: What is the difference between REF3140AQDBZRQ1 and REF3140AIDBZR?

A: Electrical performance is identical. REF3140AQDBZRQ1 carries AEC-Q100 automotive qualification and is supplied in Tape & Reel (TR) packaging with MSL rating of 2 (1 Year), compared to MSL 1 (Unlimited) for the main part. Select REF3140AQDBZRQ1 for automotive applications.

Q: Can MAX6064AEUR+T replace REF3140AIDBZR in all applications?

A: MAX6064AEUR+T is functionally compatible for applications where output current requirement is 5 mA or less. It maintains ±0.2% tolerance and 20ppm/°C temperature coefficient. However, operating temperature range is limited to -40°C to 85°C (versus -40°C to 125°C for REF3140AIDBZR). Verify application temperature requirements before substitution.

Q: What are the key differences between MAX6064AEUR+T and MAX6064BEUR+T?

A: Both deliver 4.096V output at 5 mA in SOT-23-3 package. MAX6064AEUR+T maintains ±0.2% tolerance with 20ppm/°C temperature coefficient. MAX6064BEUR+T has relaxed ±0.4% tolerance with 30ppm/°C temperature coefficient. Select MAX6064AEUR+T for applications requiring tighter tolerance control.

Q: When should X60003CIG3Z-41T1 be selected?

A: X60003CIG3Z-41T1 is optimal for precision analog applications requiring superior tolerance (±0.06%) and low noise performance (30µVp-p). The 900nA supply current is significantly lower than alternatives, making it suitable for battery-powered or ultra-low-power designs. Input voltage range is 4.5V ~ 9V. Operating temperature is -40°C to 85°C.

Q: Are all substitute parts available in SOT-23-3 package?

A: Yes. All listed substitute parts are available in SOT-23-3 (TO-236-3, SC-59) Surface Mount package, ensuring PCB layout compatibility with REF3140AIDBZR.

Q: What is the impact of selecting MAX6041AEUR+T instead of REF3140AIDBZR?

A: MAX6041AEUR+T reduces output current capability to 500 µA (versus 10 mA). It provides wider input voltage acceptance (4.296V ~ 12.6V) and lower supply current (35µA). Tolerance and temperature coefficient remain equivalent. Select only if application load current does not exceed 500 µA.

Q: Do all substitute parts meet RoHS3 compliance?

A: All Texas Instruments and Analog Devices parts listed are ROHS3 compliant. RoHS status for X60003CIG3Z-41T1 is not specified in available documentation.

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