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HomeProductsIntegrated Circuits (ICs)PMIC - Voltage ReferenceREF3130AIDBZR
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REF3130AIDBZR - Texas Instruments

Manufacturer Part Number
REF3130AIDBZR
Manufacturer
Texas Instruments
Allelco Part Number
32D-REF3130AIDBZR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
31,256 pcs available, New & Original
Parts Description
IC VREF SERIES 0.2% SOT23-3
Package
SOT-23-3
Data sheet
REF3130AIDBZR.pdf

PCN Assembly/Origin

REF3yyy 13/Nov/2019.pdf

PCN Design/Specification

Wire Chg 19/Mar/2016.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 31256
  • Unit Price: $0.70
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $0.70 $0.70
10+ $0.594 $5.94
30+ $0.535 $16.05
100+ $0.447 $44.70
500+ $0.418 $209.00
1000+ $0.404 $404.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

REF3130AIDBZR Tech Specifications
Texas Instruments - REF3130AIDBZR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - REF3130AIDBZR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Output (Min/Fixed) 3V
Voltage - Input 3.05V ~ 5.5V
Tolerance ±0.2%
Temperature Coefficient 20ppm/°C
Supplier Device Package SOT-23-3
Series -
Reference Type Series
Package / Case TO-236-3, SC-59, SOT-23-3
Product Attribute Attribute Value
Package Tape & Reel (TR)
Output Type Fixed
Operating Temperature -40°C ~ 125°C (TA)
Noise - 10Hz to 10kHz 57µVrms
Noise - 0.1Hz to 10Hz 39µVp-p
Mounting Type Surface Mount
Current - Supply 135µA
Current - Output 10 mA
Base Product Number REF3130

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

REF3130AIDBZR Image
REF3130AIDBZR (1)

Manufacturer Part Number

REF3130AIDBZR

Manufacturer

Texas Instruments

Introduction

The REF3130AIDBZR is a low-noise, high-precision series voltage reference, housed in a small SOT-23-3 package, suitable for various electronic applications requiring a stable voltage source.

Product Features and Performance

Reference Type: Series

Output Type: Fixed at 3V

Noise Levels: 39µVp-p (0.1Hz to 10Hz), 57µVrms (10Hz to 10kHz)

Tolerance: ±0.2%

Temperature Coefficient: 20ppm/°C

Voltage Input: 3.05V to 5.5V

Current Output: 10 mA

Operating Temperature: -40°C to 125°C

Product Advantages

High accuracy and low tolerance ensure reliable output

Low noise output ideal for sensitive applications

Wide operating temperature range suitable for harsh environments

Low power consumption benefits battery-operated devices

REF3130AIDBZR Image
REF3130AIDBZR (2)

Key Technical Parameters

Fixed Voltage Output: 3V

Low Output Noise: 39µVp-p and 57µVrms

Input Voltage Range: 3.05V to 5.5V

Temperature Coefficient: 20ppm/°C

Output Current: 10 mA

Quality and Safety Features

Strict tolerance levels and robust temperature coefficients ensure device reliability under varying conditions and applications.

Compatibility

Compatible with surface-mount technology for ease of integration in various circuit designs.

Packaged in standard SOT-23-3, suitable for automated assembly processes.

Application Areas

Precision voltage regulation in mixed-signal systems

Data acquisition systems

Portable and battery-powered equipment

Medical devices

Instrumentation

Product Lifecycle

Currently active

Ongoing manufacturer support with no announced discontinuation

Replacement and upgrade options available

Several Key Reasons to Choose This Product

High reliability and precision suitable for critical and high-performance applications.

SOT-23-3 package offers compact and versatile integration possibilities.

Low current supply and power efficiency optimize the performance of portable devices.

Stable performance across a wide range of operating temperatures, enhancing device robustness.

Supported by Texas Instruments' reputation and reliability in semiconductor manufacturing.

Frequently Asked Questions(FAQ)

How does the REF3130AIDBZR voltage reference perform in high-temperature environments, and what thermal considerations should be accounted for when selecting it for a 125°C ambient application?
The REF3130AIDBZR is rated for operation from -40°C to 125°C (TA), making it suitable for extreme temperature conditions commonly encountered in industrial or automotive systems. Its 20 ppm/°C temperature coefficient ensures minimal output drift over this range, with typical variation staying well within the ±0.2% initial accuracy specification even at full operating temperature. However, designers must consider power dissipation limits in SOT-23-3 packaging—maximum junction temperature is 150°C, so continuous operation near 125°C ambient requires careful layout to avoid localized heating. Thermal resistance (θJA) of approximately 227°C/W means that under worst-case current draw (135 µA supply + 10 mA load), self-heating is negligible, but proximity to other heat-generating components should still be evaluated.
What are the noise characteristics of the REF3130AIDBZR, and how do they impact precision analog subsystems such as high-resolution ADCs or low-drift sensor interfaces?
The REF3130AIDBZR exhibits low broadband and ultralow-frequency noise: 57 µVrms between 10 Hz and 10 kHz, and 39 µVp-p over the 0.1 Hz to 10 Hz band. These values make it suitable for precision applications requiring stable DC references, such as 16-bit or higher resolution data converters. In a typical 3.0 V output system driving an ADC input stage, this noise level translates to less than one LSB error at 18 bits resolution, assuming ideal scaling. For sensor conditioning circuits where long-term stability matters, the low 0.1Hz–10Hz noise ensures minimal drift during transient events like thermal cycling or power-up sequences.
Can the REF3130AIDBZR be used as a programmable voltage reference by modifying its feedback network, and what limitations exist compared to dedicated adjustable references?
While the REF3130AIDBZR is inherently a fixed 3.0 V output device, external resistors can scale its output using standard resistor dividers—though this approach introduces gain error, temperature coefficient mismatch, and reduced load drive capability. Unlike adjustable references such as the REF5030AIDBZR, which offer internal divider networks and better-matched resistors, externally scaling the REF3130AIDBZR increases total system error beyond its native ±0.2% accuracy. Additionally, loading effects on the output may degrade performance unless buffered. Therefore, while feasible for coarse adjustments in non-critical applications, it’s not recommended for high-precision designs where absolute accuracy and stability are paramount.
How does the REF3130AIDBZR compare to alternative 3V references like the LM4040 or MAX6035 in terms of power consumption and startup behavior?
Compared to alternatives such as the LM4040 (which draws ~120 µA typical) and the MAX6035 (drawing ~80 µA), the REF3130AIDBZR consumes slightly more quiescent current at 135 µA, but offers superior initial accuracy (±0.2% vs. ±0.5% for many LM4040 variants). The MAX6035 provides lower noise (~30 µVrms) but operates at higher voltages (up to 18 V), which may not suit low-voltage systems. Startup time for the REF3130AIDBZR is typically under 1 ms, comparable to most precision references, though some older designs using shunt references may exhibit longer stabilization times. When targeting battery-powered or always-on systems, the trade-off between accuracy, noise, and supply current must be weighed based on overall system requirements.
What are the implications of using the REF3130AIDBZR in a multi-reference design where multiple ICs must track each other closely over temperature?
In multi-reference configurations, even small differences in initial tolerance or temperature coefficient can lead to significant tracking errors. Since all REF3130AIDBZRs share the same base design and batch characteristics, they exhibit excellent part-to-part matching—both in initial offset and drift. With a maximum temperature coefficient of 20 ppm/°C, two units will typically track within 60 ppm (≈0.18 mV at 3 V) over a 100°C span. This makes them viable for differential measurement architectures or redundancy schemes where consistency across channels outweighs absolute precision. However, PCB layout symmetry and shared thermal paths should be maintained to minimize local gradients.
Is it acceptable to operate the REF3130AIDBZR near its minimum input voltage of 3.05 V if powered by a regulated 3.3 V rail with potential dropout concerns?
Yes, but only under controlled conditions. The REF3130AIDBZR requires a minimum of 3.05 V at the input, leaving just 50 mV headroom from a 3.3 V supply. Any voltage sag due to load transients, line regulation issues, or insufficient bypassing could cause the reference to lose regulation, degrading output accuracy. Using a well-regulated LDO or ensuring adequate decoupling capacitors within 1 cm of the IC helps maintain stable input. If the system experiences frequent brownouts or uses switching regulators with poor PSRR, consider adding additional filtering or selecting a reference with lower dropout instead.
What precautions should be taken when soldering the REF3130AIDBZR in mass production using reflow profiles, given its MSL rating of 1?
As an MSL 1 component, the REF3130AIDBZR has unlimited shelf life and does not require baking before use. However, standard lead-free reflow profiles must still comply with JEDEC J-STD-020, typically peaking around 240°C for 30–60 seconds. Excessive thermal exposure can compromise bond integrity or package delamination, especially in high-reliability applications. TI recommends avoiding peak temperatures above 260°C or cumulative time above 250°C exceeding 120 seconds. Proper stencil printing, alignment, and nitrogen reflow environments further reduce defect rates during automated assembly.
How does the output current capability of the REF3130AIDBZR affect its use in driving capacitive loads or long PCB traces without oscillation?
The REF3130AIDBZR delivers up to 10 mA of output current, sufficient for most digital logic or moderate analog loads. However, capacitive loads greater than 1 µF can introduce phase lag that destabilizes the internal amplifier, leading to ringing or oscillations. If driving long traces or large bypass capacitors at the load end, a small series resistor (e.g., 10 Ω) or buffer amplifier should be inserted. In cases where output capacitance exceeds 10 µF, external compensation or isolation is strongly advised to preserve stability and prevent erratic behavior during dynamic loads.
Can the REF3130AIDBZR be paralleled with another unit to increase output current capacity, and what risks does this introduce?
Paralleling two REF3130AIDBZR devices is generally discouraged. Without precise current sharing circuitry, one device may dominate the load due to slight variations in turn-on threshold or output impedance, leading to uneven stress and potential failure. Even with matched parts, the inherent mismatch in conduction characteristics prevents reliable current division. Instead, use a dedicated higher-current reference or add an op-amp buffer configured as a unity-gain follower to isolate the reference from heavy loads while maintaining accuracy.
What role does the internal architecture play in the REF3130AIDBZR’s ability to reject power supply ripple, and how does this benefit sensitive analog front ends?
The REF3130AIDBZR employs a buried Zener-based bandgap architecture optimized for high PSRR across frequencies. While exact PSRR curves aren’t specified in the datasheet, typical performance exceeds 60 dB from DC to 100 Hz, decaying gradually to ~40 dB at 1 MHz. This allows clean 3 V references even when powered through noisy switching rails, provided adequate bulk and high-frequency decoupling (e.g., 10 µF tantalum + 0.1 µF ceramic) is applied close to the IC. For systems fed by linear regulators, this feature becomes less critical, but remains valuable in mixed-signal designs where noise coupling through shared supplies is a concern.
How does the REF3130AIDBZR handle reverse polarity protection, and what circuit modifications are needed if the input might experience accidental inversion?
The REF3130AIDBZR lacks built-in reverse polarity protection. Applying negative voltage or swapping input polarity can damage the device permanently. To safeguard against accidental reverse connections, insert a Schottky diode in series with the input (anode toward ground), allowing forward conduction while blocking reverse current. Alternatively, use a P-channel MOSFET as a high-side switch controlled by system power sequencing logic. Both methods add minimal voltage drop (Schottky: ~0.3 V; MOSFET: <0.1 V in modern parts) and protect the reference without affecting normal operation.
In what scenarios would the REF3130AIDBZR be preferred over a shunt-type reference like the TL431, despite higher quiescent current?
The REF3130AIDBZR is preferable when low output impedance, high source capability, and predictable startup dynamics are required—conditions where shunt references fall short. Shunt types like the TL431 act as variable resistors, sinking current rather than sourcing it, leading to higher effective system power loss under load. The REF3130AIDBZR actively sources 10 mA, enabling stable operation with downstream buffers or active loads. Additionally, its monolithic construction yields better thermal performance and immunity to layout parasitics, making it ideal for microcontroller-based systems needing reliable ADC/DAC references with fast settling times.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments REF3130AIDBZR

Product Attribute REF3130AIDBZRG4 REF3133AIDBZR REF3130AIDBZT REF3133AIDBZRG4
Part Number REF3130AIDBZRG4 REF3133AIDBZR REF3130AIDBZT REF3133AIDBZRG4
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Mounting Type - Surface Mount Through Hole Surface Mount
Noise - 0.1Hz to 10Hz - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Temperature Coefficient - - - -
Voltage - Input - - - -
Current - Output - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Noise - 10Hz to 10kHz - - - -
Reference Type - External, Internal External External, Internal
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Base Product Number - DAC34H84 MAX500 ADS62P42
Tolerance - - - -
Current - Supply - - - -
Voltage - Output (Min/Fixed) - - - -
Series - - - -

REF3130AIDBZR Datasheet PDF

Download REF3130AIDBZR pdf datasheets and Texas Instruments documentation for REF3130AIDBZR - Texas Instruments.

HTML Datasheet
REF3112/20/25/30/33/40.pdf
PCN Assembly/Origin
REF3yyy 13/Nov/2019.pdf
PCN Design/Specification
Wire Chg 19/Mar/2016.pdf

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REF3130AIDBZR Image

REF3130AIDBZR

Texas Instruments
32D-REF3130AIDBZR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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