REF3320AIDBZR Equivalent & Substitute Parts

Part Overview

The REF3320AIDBZR is a series voltage reference IC manufactured by Texas Instruments, designed for precision analog applications requiring a fixed 2.048V output. This Surface Mount device operates across the industrial temperature range of -40°C to 125°C and delivers 5 mA output current with ±0.15% 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 performance specifications need adjustment within acceptable operating parameters.

Key Parameters

Parameter	REF3320AIDBZR
Manufacturer	Texas Instruments
Output Voltage (Fixed)	2.048V
Output Current	5 mA
Tolerance	±0.15%
Temperature Coefficient	30ppm/°C
Input Voltage Range	2.248V ~ 5.5V
Supply Current	8.5µA
Operating Temperature	-40°C ~ 125°C
Package	SOT-23-3
Noise (0.1Hz to 10Hz)	55µVp-p

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: fixed output voltage of 2.048V, SOT-23-3 package compatibility, Surface Mount mounting type, and operating temperature range overlap. Parts are grouped into three categories based on tolerance and performance characteristics:

Category 1: Direct Parametric Equivalents — Parts with identical or tighter tolerance (±0.15% or better), matching output current (5 mA), and overlapping temperature ranges. These parts are direct drop-in replacements.

Category 2: Functional Equivalents with Relaxed Tolerance — Parts with 2.048V output, 5 mA current capability, but wider tolerance (±0.24% to ±0.39%). These are suitable when tolerance requirements are less stringent.

Category 3: Functional Equivalents with Reduced Output Current — Parts with 2.048V output and SOT-23-3 package but lower output current (1 mA). These are suitable for applications with reduced current draw requirements.

Category 4: Enhanced Performance Equivalents — Parts with superior tolerance (±0.05%), lower noise, and improved temperature coefficient. These are suitable for high-precision applications.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Tolerance	Temp Coeff	Input Range	Supply Current	Op Temp Range	Noise (0.1-10Hz)	Package
REF3320AIDBZR	Texas Instruments	2.048V	5 mA	±0.15%	30ppm/°C	2.248V ~ 5.5V	8.5µA	-40°C ~ 125°C	55µVp-p	SOT-23-3
REF3320AIDBZT	Texas Instruments	2.048V	5 mA	±0.15%	30ppm/°C	2.248V ~ 5.5V	8.5µA	-40°C ~ 125°C	55µVp-p	SOT-23-3
ADR380ARTZ-REEL7	Analog Devices Inc.	2.048V	5 mA	±0.24%	25ppm/°C	2.4V ~ 18V	140µA	-40°C ~ 85°C	5µVp-p	SOT-23-3
ISL21080CIH320Z-TK	Renesas Electronics	2.048V	7 mA	±0.3%	50ppm/°C	2.7V ~ 5.5V	1.5µA	-40°C ~ 85°C	30µVp-p	SOT-23-3
ISL60002BIH320Z-T7A	Renesas Electronics	2.048V	7 mA	±0.05%	20ppm/°C	2.7V ~ 5.5V	900nA	-40°C ~ 85°C	30µVp-p	SOT-23-3
MAX6018AEUR21+T	Analog Devices Inc./Maxim	2.048V	1 mA	±0.2%	50ppm/°C	2.25V ~ 5.5V	6µA	-40°C ~ 85°C	50µVp-p	SOT-23-3
MAX6018BEUR21+T	Analog Devices Inc./Maxim	2.048V	1 mA	±0.4%	50ppm/°C	2.25V ~ 5.5V	6µA	-40°C ~ 85°C	50µVp-p	SOT-23-3
MAX6062AEUR+T	Analog Devices Inc./Maxim	2.048V	5 mA	±0.24%	20ppm/°C	2.5V ~ 12.6V	125µA	-40°C ~ 85°C	22µVp-p	SOT-23-3
MAX6062BEUR+T	Analog Devices Inc./Maxim	2.048V	5 mA	±0.39%	30ppm/°C	2.5V ~ 12.6V	125µA	-40°C ~ 85°C	22µVp-p	SOT-23-3
MAX6106EUR+T	Analog Devices Inc./Maxim	2.048V	5 mA	±0.4%	75ppm/°C	2.5V ~ 12.6V	125µA	-40°C ~ 85°C	22µVp-p	SOT-23-3

Engineering Selection Recommendations

REF3320AIDBZT is the primary direct equivalent, offering identical electrical specifications and tolerance. Both parts are Texas Instruments products with Active status and ROHS3 compliance. Selection between REF3320AIDBZR and REF3320AIDBZT depends on packaging format availability (Cut Tape vs. Tape & Reel).

ISL60002BIH320Z-T7A is recommended for applications requiring superior tolerance (±0.05%) and lower temperature coefficient (20ppm/°C). This Renesas part offers enhanced precision with reduced supply current (900nA) and is ROHS3 compliant with MSL 1 rating.

MAX6062AEUR+T provides functional equivalence with 5 mA output current and ±0.24% tolerance. The Analog Devices part features lower noise (22µVp-p) and improved temperature coefficient (20ppm/°C) compared to the main part, with extended input voltage range (2.5V ~ 12.6V).

ADR380ARTZ-REEL7 is suitable when extended input voltage range (2.4V ~ 18V) is required. The Analog Devices part maintains 5 mA output current with ±0.24% tolerance but operates to -40°C ~ 85°C.

MAX6018AEUR21+T and MAX6018BEUR21+T are applicable only when output current requirements are reduced to 1 mA. These parts are not suitable for applications requiring 5 mA output current.

All substitute parts maintain SOT-23-3 package compatibility, Surface Mount mounting type, and 2.048V fixed output voltage. Operating temperature range differences must be evaluated against specific application requirements.

Frequently Asked Questions (FAQ)

Q: Can REF3320AIDBZT directly replace REF3320AIDBZR?

A: Yes. Both parts are Texas Instruments products with identical electrical specifications: 2.048V output, 5 mA current, ±0.15% tolerance, 30ppm/°C temperature coefficient, and -40°C to 125°C operating range. The difference is packaging format (Cut Tape vs. Tape & Reel). Electrical performance and pinout are identical.

Q: What is the key difference between REF3320AIDBZR and ISL60002BIH320Z-T7A?

A: ISL60002BIH320Z-T7A offers superior tolerance (±0.05% vs. ±0.15%), lower temperature coefficient (20ppm/°C vs. 30ppm/°C), and significantly lower supply current (900nA vs. 8.5µA). Output voltage and current remain identical at 2.048V and 7 mA respectively. Operating temperature range is -40°C to 85°C (vs. 125°C maximum for REF3320AIDBZR).

Q: Can MAX6018 series parts substitute for REF3320AIDBZR?

A: MAX6018 parts are not suitable direct substitutes. While they maintain 2.048V output and SOT-23-3 package, output current is reduced to 1 mA (vs. 5 mA required). These parts are applicable only in applications with reduced current requirements.

Q: What are the supply current implications when selecting alternatives?

A: Supply current varies significantly across substitutes. REF3320AIDBZR draws 8.5µA, while ISL60002BIH320Z-T7A draws only 900nA and ISL21080CIH320Z-TK draws 1.5µA. MAX6062 and MAX6106 series draw 125µA. Selection depends on power budget constraints in the application circuit.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. MSL ratings vary: REF3320AIDBZR and REF3320AIDBZT are MSL 2 (1 Year), while all Analog Devices and Renesas alternatives are MSL 1 (Unlimited).

Q: What input voltage range considerations apply to substitution?

A: REF3320AIDBZR operates with 2.248V to 5.5V input. ADR380ARTZ-REEL7 extends this to 2.4V to 18V, suitable for higher supply voltage applications. MAX6062 and MAX6106 series operate 2.5V to 12.6V. ISL parts operate 2.7V to 5.5V. Verify input voltage compatibility with your power supply design.

Q: Can parts with different output current ratings be used interchangeably?

A: No. Output current rating indicates maximum available current. ISL21080CIH320Z-TK and ISL60002BIH320Z-T7A provide 7 mA (vs. 5 mA for REF3320AIDBZR), which is acceptable in applications requiring 5 mA or less. MAX6018 series at 1 mA is suitable only for reduced-current applications. Verify circuit load requirements before substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message