My Inquiry
My Account
Analog Devices Inc. ADR03BUJ-R2
- Part No.:
- ADR03BUJ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADR03BUJ-R2.pdf
- Description:
- IC VREF SERIES PREC TSOT-23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADR03BUJ-R2 from Analog Devices is a precision 2.5 V band gap voltage reference in a 5-lead TSOT package, featuring ±0.2% initial accuracy, 9 ppm/°C max temperature coefficient (B grade), and 5 µVp-p (0.1 Hz to 10 Hz) low-noise output. It operates from 4.5 V to 36 V supply and delivers up to 10 mA, supporting high-resolution ADCs and industrial sensor signal chains.
For engineers reviewing the ADR03BUJ-R2 datasheet, ADR03BUJ-R2 pinout, ADR03BUJ-R2 application, or ADR03BUJ-R2 equivalent, key selection criteria include its ultracompact TSOT-5 footprint, integrated TEMP pin for on-chip temperature monitoring (550 mV @ 25°C, 1.96 mV/°C), TRIM capability for fine output adjustment, and −40°C to +125°C extended industrial operating range.
Technical Context
The ADR03BUJ-R2 implements a laser-trimmed band gap core with internal curvature correction, enabling stable 2.5 V output across wide supply (4.5 V–36 V) and temperature (−40°C to +125°C) ranges. Its B-grade specification guarantees ≤9 ppm/°C tempco in the TSOT-5 package and supports direct replacement of REF03 in space-constrained designs.
It integrates dedicated pins for voltage trimming (TRIM), temperature sensing (TEMP), and unregulated input (VIN), with GND and VOUT completing the 5-terminal interface. No external capacitor is required for stability, and the device achieves 70 ppm/mA load regulation and 30 ppm/V line regulation over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV (B grade); enables precise 12-/16-bit DAC/ADC biasing without calibration. |
| Initial Accuracy | ±0.1% (±2.5 mV); reduces system-level gain error in precision measurement front-ends. |
| Tempco (max) | 9 ppm/°C (TSOT-5, B grade); contributes ≤0.9 mV drift over −40°C to +85°C ambient. |
| Voltage Noise | 5 µVp-p (0.1 Hz–10 Hz); minimizes quantization noise in 24-bit delta-sigma converters. |
| Supply Range | 4.5 V to 36 V; allows direct connection to automotive battery rails or industrial 24 V systems. |
| Output Current | 10 mA sink/source; drives op-amp buffers, SAR ADC references, or multiple parallel loads. |
| Quiescent Current | 0.65–1.0 mA; supports low-power portable instrumentation and always-on monitoring nodes. |
Pinout & Package
ADR03BUJ-R2 uses the 5-lead TSOT-5 (UJ-5) surface-mount package (2.1 mm × 1.6 mm × 0.6 mm), optimized for high-density PCB layouts. Thermal resistance θJA = 230°C/W reflects standard JEDEC 2-layer board mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Unregulated Input Supply | Accepts 4.5 V–36 V; dropout voltage ≤2 V ensures operation even at low input margins. |
| 2 - GND | Analog Ground Reference | Common return for reference output, trim network, and temperature sensor; requires low-impedance plane. |
| 3 - VOUT | Precision Output Terminal | Stable 2.5 V source; capable of sourcing/sinking 10 mA with <70 ppm/mA load regulation. |
| 4 - TRIM | Output Voltage Adjustment Node | Connects to external resistor divider for ±0.5% fine-tuning; high-impedance input draws <100 nA. |
| 5 - TEMP | Temperature Sensor Output | Provides 550 mV @ 25°C with 1.96 mV/°C slope; enables on-chip die temperature monitoring without external sensors. |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact TSOT-5 package | 2.1 mm × 1.6 mm footprint saves >60% board area vs. SOIC-8; ideal for PCMCIA, IoT sensor modules. |
| Integrated temperature sensor | Monitors junction temperature via TEMP pin (550 mV ±10 mV @ 25°C); eliminates discrete thermal ICs in safety-critical systems. |
| No external capacitor required | Guaranteed stability with capacitive loads up to 100 nF; simplifies layout and reduces BOM count. |
| B-grade precision in TSOT | 9 ppm/°C max tempco and ±0.1% initial accuracy in smallest package-uniquely balances size and performance. |
| Wide industrial temperature range | Specified from −40°C to +125°C; qualified for under-hood automotive, factory automation, and outdoor metering. |
Applications
| Industrial Process Transmitters | Precision Data Acquisition Systems |
|---|---|
|
Use Scenario: 4 mA–20 mA loop-powered field transmitter conditioning thermocouple or RTD signals. IC Role / Device Role / Timing Role: Primary 2.5 V reference for sigma-delta ADC and programmable gain amplifier. Use Value: Low 5 µVp-p noise and 9 ppm/°C tempco ensure <0.01% total unadjusted error over temperature and time. |
Use Scenario: Portable handheld multimeter with 6½-digit resolution and auto-ranging. IC Role / Device Role / Timing Role: Stable reference for dual-slope integrator and auto-zero amplifier stages. Use Value: TRIM pin enables factory calibration to ±0.01% absolute accuracy; TEMP pin validates thermal derating during self-test. |
| Auto Battery Monitoring Units | High-Resolution Converter Front-Ends |
|
Use Scenario: In-vehicle 12 V/24 V battery state-of-charge monitor with CAN interface. IC Role / Device Role / Timing Role: Reference for ADC measuring shunt voltage and battery temperature. Use Value: 4.5 V min input enables operation during cranking dips; −40°C to +125°C rating covers engine bay environments. |
Use Scenario: Medical EEG/ECG analog front-end requiring ultra-low-noise DC bias. IC Role / Device Role / Timing Role: Low-noise 2.5 V reference for instrumentation amplifier common-mode setting. Use Value: 5 µVp-p (0.1–10 Hz) noise prevents baseline wander in sub-µV biological signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR03AKSZ-REEL7 | SOIC-8 package, same B-grade specs but 3 ppm/°C typical tempco (vs. 9 ppm/°C max in TSOT); larger footprint, higher θJA (130°C/W). | Preferred where board space permits and lower tempco is prioritized over size; not suitable for ultra-thin modules. | Select when long-term stability (<50 ppm/1000 hrs) and minimal thermal drift outweigh compactness requirements. |
| REF03GSZ-REEL | Legacy 8-lead SOIC; pin-compatible with ADR03 SOIC versions but lacks TEMP pin and has 25 ppm/°C max tempco (C grade). | Used in legacy designs upgrading from REF03; no on-chip temperature sensing capability. | Choose only for drop-in replacement in existing REF03-based boards; avoid for new designs requiring TEMP functionality or tighter tempco. |
Compared with ADR03AKSZ-REEL7 and REF03GSZ-REEL, the ADR03BUJ-R2 uniquely delivers B-grade precision in the smallest possible package while integrating temperature monitoring-enabling smaller, smarter, and more thermally aware reference subsystems without sacrificing accuracy.
Availability
ADR03BUJ-R2 is available at Aetrix Electronics and suitable for industrial process transmitters, precision data acquisition systems, and auto battery monitoring units requiring stable component supply, long-lifecycle support, and guaranteed TSOT-5 packaging consistency.
Supply support for ADR03BUJ-R2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADR03 is part of Analog Devices' precision voltage reference product line, engineered for metrology-grade accuracy, low noise, and robust operation in harsh industrial and automotive environments.
FAQ
What is the maximum operating temperature range for the ADR03BUJ-R2?
The ADR03BUJ-R2 is fully specified from −40°C to +125°C ambient temperature, with all electrical parameters-including output voltage, tempco, and load regulation-guaranteed across this extended industrial range. This makes ADR03BUJ-R2 suitable for under-hood automotive, factory floor, and outdoor metering applications where thermal extremes are routine.
Does the ADR03BUJ-R2 require an external output capacitor for stability?
No, the ADR03BUJ-R2 is internally compensated and does not require an external output capacitor for stability. It remains stable driving capacitive loads up to 100 nF, simplifying design and reducing bill-of-materials cost. However, a 0.1 µF ceramic input capacitor is recommended near the VIN pin for improved ripple rejection.
How is the TEMP pin used in the ADR03BUJ-R2?
The TEMP pin on the ADR03BUJ-R2 outputs a calibrated analog voltage (550 mV ±10 mV at 25°C) with a linear sensitivity of 1.96 mV/°C, enabling direct junction temperature monitoring. It requires no external components and can be read by any ADC channel-providing real-time thermal feedback for system diagnostics or derating logic without adding discrete sensors.
Can the ADR03BUJ-R2 replace the REF03 in existing designs?
The ADR03BUJ-R2 is not pin-compatible with the REF03 due to its 5-lead TSOT-5 package versus REF03's 8-lead SOIC. However, the ADR03 in SOIC-8 (e.g., ADR03AKSZ-REEL7) is a direct pin-for-pin replacement for REF03 with added TEMP functionality. For new designs prioritizing miniaturization, ADR03BUJ-R2 offers superior performance per mm² but requires PCB redesign.
What is the typical voltage noise performance of the ADR03BUJ-R2?
The ADR03BUJ-R2 delivers 5 µVp-p (0.1 Hz to 10 Hz) low-frequency voltage noise, corresponding to 2 ppmp-p of its 2.5 V output. This performance is critical for high-resolution delta-sigma ADCs and precision weigh-scale systems where noise directly limits effective resolution and measurement repeatability.
ADR03BUJ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
ADR03BUJ-R2 FAQ
1.How can I place an order for ADR03BUJ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR03BUJ-R2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADR03BUJ-R2 reliable?
The price and inventory of ADR03BUJ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR03BUJ-R2 is usually 5 days.
3.What payment methods are accepted for ADR03BUJ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR03BUJ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR03BUJ-R2?
ADR03BUJ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR03BUJ-R2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADR03BUJ-R2?
For technical support, including ADR03BUJ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR03BUJ-R2 requirements.
6.How does Aetrix verify that ADR03BUJ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR03BUJ-R2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADR03BUJ-R2 meets industry standards.
7.What is the process for return or replacement of ADR03BUJ-R2?
All ADR03BUJ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR03BUJ-R2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADR03BUJ-R2 part is unused and in its original packaging.
Return procedure for ADR03BUJ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR03BUJ-R2 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
