REF3320AIDBZRG4 Equivalent & Substitute Parts

Part Overview

The REF3320AIDBZRG4 is a series voltage reference IC manufactured by Texas Instruments, delivering a fixed 2.048V output with ±0.15% tolerance in a SOT-23-3 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The REF3320AIDBZRG4 serves as a precision voltage reference in power management applications requiring stable reference voltages across industrial temperature ranges.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	REF3320AIDBZRG4
Category	Power Management (PMIC)
Output Voltage	2.048V (Fixed)
Output Current	5 mA
Tolerance	±0.15%
Temperature Coefficient	30ppm/°C
Noise (0.1Hz to 10Hz)	55µVp-p
Input Voltage Range	2.248V ~ 5.5V
Supply Current	8.5µA
Operating Temperature	-40°C ~ 125°C (TA)
Package	SOT-23-3 (TO-236-3, SC-59)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	2 (1 Year)

Substitute Part Grouping Explanation

Substitution eligibility for the REF3320AIDBZRG4 is determined by the following critical parameters:

Primary Matching Criteria:

Fixed output voltage of 2.048V
SOT-23-3 surface mount package
Output current capability of 5 mA or greater
Input voltage range compatibility (minimum 2.248V supply capability)
Operating temperature range of -40°C to 125°C or broader

Secondary Compatibility Factors:

Tolerance specification (±0.15% or tighter preferred for direct replacement)
Temperature coefficient performance
Supply current efficiency
Noise characteristics

Substitute parts are grouped into two categories: direct equivalents from Texas Instruments with identical electrical specifications, and parametric equivalents from alternative manufacturers (Analog Devices, Renesas) that meet or exceed the core electrical requirements while maintaining package compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Tolerance	Temp Coeff	Input Range	Supply Current	Temp Range	Product Status
REF3320AIDBZRG4	Texas Instruments	2.048V	5 mA	±0.15%	30ppm/°C	2.248V ~ 5.5V	8.5µA	-40°C ~ 125°C	Obsolete
REF3320AIDBZR	Texas Instruments	2.048V	5 mA	±0.15%	30ppm/°C	2.248V ~ 5.5V	8.5µA	-40°C ~ 125°C	Active
REF3320AIDBZT	Texas Instruments	2.048V	5 mA	±0.15%	30ppm/°C	2.248V ~ 5.5V	8.5µA	-40°C ~ 125°C	Active
ADR380ARTZ-REEL7	Analog Devices Inc.	2.048V	5 mA	±0.24%	25ppm/°C	2.4V ~ 18V	140µA	-40°C ~ 85°C	Active
ISL21080CIH320Z-TK	Renesas Electronics	2.048V	7 mA	±0.3%	50ppm/°C	2.7V ~ 5.5V	1.5µA	-40°C ~ 85°C	Active
ISL60002BIH320Z-T7A	Renesas Electronics	2.048V	7 mA	±0.05%	20ppm/°C	2.7V ~ 5.5V	900nA	-40°C ~ 85°C	Active
MAX6018AEUR21+T	Analog Devices Inc./Maxim	2.048V	1 mA	±0.2%	50ppm/°C	2.25V ~ 5.5V	6µA	-40°C ~ 85°C	Active
MAX6018BEUR21+T	Analog Devices Inc./Maxim	2.048V	1 mA	±0.4%	50ppm/°C	2.25V ~ 5.5V	6µA	-40°C ~ 85°C	Active
MAX6062AEUR+T	Analog Devices Inc./Maxim	2.048V	5 mA	±0.24%	20ppm/°C	2.5V ~ 12.6V	125µA	-40°C ~ 85°C	Active
MAX6062BEUR+T	Analog Devices Inc./Maxim	2.048V	5 mA	±0.39%	30ppm/°C	2.5V ~ 12.6V	125µA	-40°C ~ 85°C	Active
MAX6106EUR+T	Analog Devices Inc./Maxim	2.048V	5 mA	±0.4%	75ppm/°C	2.5V ~ 12.6V	125µA	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

REF3320AIDBZR and REF3320AIDBZT are direct functional equivalents to the obsolete REF3320AIDBZRG4. Both parts are active products from Texas Instruments with identical output voltage, tolerance, temperature coefficient, and supply current specifications. These parts maintain the same SOT-23-3 package and operating temperature range. Selection between these two variants depends on packaging format availability: REF3320AIDBZR is available in Cut Tape and Digi-Reel format, while REF3320AIDBZT is available in Cut Tape and Digi-Reel format. Both are ROHS3 compliant with MSL rating of 2 (1 Year).

Parametric Equivalents with Enhanced Performance:

ISL60002BIH320Z-T7A (Renesas Electronics) offers superior tolerance performance at ±0.05% with lower temperature coefficient (20ppm/°C) and significantly reduced supply current (900nA). This part is suitable for applications requiring tighter voltage accuracy and lower power consumption. Operating temperature range is limited to -40°C to 85°C, which may restrict use in extended temperature applications.

MAX6062AEUR+T (Analog Devices/Maxim) provides ±0.24% tolerance with 5 mA output current matching the original specification. This part features lower temperature coefficient (20ppm/°C) and reduced noise characteristics. Input voltage range extends to 12.6V, providing greater supply flexibility.

Parametric Equivalents with Reduced Output Current:

MAX6018AEUR21+T and MAX6018BEUR21+T are suitable only for applications requiring 1 mA or less output current. These parts are not recommended as direct replacements for designs requiring the full 5 mA output capability of the REF3320AIDBZRG4.

Compliance and Certification:

All substitute parts listed are ROHS3 compliant and REACH unaffected. MSL ratings vary: Texas Instruments parts maintain MSL 2 (1 Year), while Analog Devices and Renesas parts feature MSL 1 (Unlimited), indicating superior moisture resistance for storage and handling.

Frequently Asked Questions (FAQ)

Q: Can REF3320AIDBZR directly replace REF3320AIDBZRG4 in existing designs?

A: Yes. REF3320AIDBZR is electrically and functionally identical to REF3320AIDBZRG4. The primary difference is product status: REF3320AIDBZRG4 is obsolete while REF3320AIDBZR is active. Both parts share identical output voltage (2.048V), tolerance (±0.15%), temperature coefficient (30ppm/°C), and package specifications (SOT-23-3). Designs require no modification.

Q: What is the difference between REF3320AIDBZR and REF3320AIDBZT?

A: Both parts are electrically identical with the same electrical specifications. The difference lies in packaging format: REF3320AIDBZR is supplied in Cut Tape and Digi-Reel format, while REF3320AIDBZT is supplied in Cut Tape and Digi-Reel format. Selection depends on procurement and assembly requirements.

Q: Can ISL60002BIH320Z-T7A replace REF3320AIDBZRG4?

A: ISL60002BIH320Z-T7A is a parametric equivalent suitable for applications where tighter tolerance (±0.05% versus ±0.15%) and lower supply current (900nA versus 8.5µA) provide design benefits. However, the operating temperature range is limited to -40°C to 85°C, compared to -40°C to 125°C for the original part. Designs operating above 85°C require the original specification or alternative parts maintaining the extended temperature range.

Q: Why do some substitute parts have lower output current ratings?

A: MAX6018AEUR21+T and MAX6018BEUR21+T are designed for low-current reference applications with 1 mA maximum output. These parts are not suitable for designs requiring 5 mA output current. Selection must match application current requirements.

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

A: Yes. All substitute parts listed are available in SOT-23-3 package (TO-236-3, SC-59 equivalent designations). Package compatibility is maintained across all alternatives, enabling direct PCB footprint compatibility.

Q: What is the significance of MSL rating differences?

A: MSL (Moisture Sensitivity Level) indicates moisture absorption risk during storage. REF3320AIDBZRG4, REF3320AIDBZR, and REF3320AIDBZT carry MSL 2 (1 Year), requiring reflow within one year of opening. Renesas and Analog Devices alternatives carry MSL 1 (Unlimited), eliminating time-based storage constraints. For high-volume or long-term inventory applications, MSL 1 rated parts reduce procurement complexity.

Q: Can MAX6062AEUR+T replace REF3320AIDBZRG4?

A: MAX6062AEUR+T is a parametric equivalent with matching 5 mA output current and 2.048V output voltage. Tolerance is ±0.24% versus ±0.15% for the original part. Temperature coefficient is superior at 20ppm/°C versus 30ppm/°C. Input voltage range extends to 12.6V, providing greater supply flexibility. Operating temperature range is -40°C to 85°C, limiting use in extended temperature applications above 85°C.

Q: What are the key parameters determining substitution eligibility?

A: Substitution eligibility is determined by: fixed 2.048V output voltage, SOT-23-3 package compatibility, output current capability of 5 mA or greater, input voltage range supporting minimum 2.248V supply, and operating temperature range of -40°C to 125°C or broader. Tolerance and temperature coefficient are secondary factors affecting performance but not substitution eligibility.

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