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Analog Devices Inc. ADR361BUJZ-R2
- Part No.:
- ADR361BUJZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADR361BUJZ-R2.pdf
- Description:
- IC VREF SERIES 0.12% TSOT5
- Quantity:
- Payment:
- Shipping:
Inventory:1,487
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Product details
Overview
ADR361BUJZ-R2 from Analog Devices is a precision 2.500 V band gap voltage reference IC with sink/source capability, ±3 mV initial accuracy (B grade), 9 ppm/°C temperature coefficient, and ultralow 8.25 µVp-p (0.1 Hz to 10 Hz) output noise - designed for high-accuracy ADC/DAC biasing in battery-powered data acquisition systems.
For engineers reviewing the ADR361BUJZ-R2 datasheet, ADR361BUJZ-R2 pinout, ADR361BUJZ-R2 application, or ADR361BUJZ-R2 equivalent, this device delivers stable low-power reference performance across −40°C to +125°C with no external capacitor required, 300 mV dropout, and 5 mA sourcing / −1 mA sinking capability.
Technical Context
The ADR361BUJZ-R2 uses a proprietary curvature-corrected band gap architecture where the reference is referenced to VOUT-not ground-enabling superior ground noise rejection. Its internal trimming and laser-adjusted resistor ratios minimize temperature-induced curvature error.
It operates as a micropower, low-dropout voltage reference requiring only VIN ≥ VOUT + 300 mV, supports load currents from −1 mA to +5 mA, and achieves 50 ppm long-term stability over 1000 hours without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±3 mV (B grade) - enables direct interface with 2.5 V ADCs/DACs without calibration overhead |
| Temp Coefficient | 9 ppm/°C (−40°C to +125°C) - ensures ≤ ±1.125 mV drift over full industrial range |
| Voltage Noise | 8.25 µVp-p (0.1 Hz to 10 Hz) - critical for 16-bit+ precision measurement front-ends |
| Dropout Voltage | 300 mV - allows operation from 2.8 V supply, ideal for single-cell Li-ion or 3.3 V rail regulation |
| Quiescent Current | 190 µA max - supports >1-year battery life in portable medical instruments at 5 µA average system current |
| Output Current | +5 mA sourcing / −1 mA sinking - drives ADC reference inputs and small bias networks directly |
| Line Regulation | 0.125 mV/V - maintains <±0.31 mV error over 2.8 V to 15 V input range |
Pinout & Package
ADR361BUJZ-R2 is housed in a compact 5-lead TSOT (UJ-5) package with exposed pad for thermal enhancement (θJA = 230°C/W). Pin 1 is Not Internally Connected (NIC); pins 2–5 provide GND, VIN, VOUT, and TRIM functions respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NIC) | Not Internally Connected | No electrical connection; must be left floating or grounded per PCB layout best practice |
| 2 (GND) | Ground Reference | Primary return path; connects to low-impedance analog ground plane to minimize noise coupling |
| 3 (VIN) | Input Supply | Accepts 2.8 V to 15 V; requires ≥300 mV headroom above VOUT for regulation |
| 4 (VOUT) | Reference Output | Stable 2.500 V source; capable of sourcing 5 mA or sinking 1 mA into load |
| 5 (TRIM) | Output Voltage Adjustment | Allows fine-tuning via external resistor divider; typical sensitivity 100 ppm/mV |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 0.1 Hz–10 Hz noise | 8.25 µVp-p - preserves SNR in precision DC-coupled sensor signal chains |
| No external capacitor required | Eliminates 2–3 passive components and board area; reduces BOM cost and startup time uncertainty |
| Low dropout (300 mV) | Enables use with single Li-ion (2.8–4.2 V) or regulated 3.3 V supplies without LDO pre-regulation |
| Sink/source capability | ±1 mA to ±5 mA bidirectional drive - supports active biasing, current-sinking DAC references, and trimming circuits |
| Automotive-grade option available | B grade qualified for −40°C to +125°C operation - meets AEC-Q100 stress test requirements |
Applications
| Battery-Powered Data Loggers | Portable ECG Monitors |
|---|---|
Use Scenario: Continuous 24-bit sigma-delta ADC sampling powered by coin cell or Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Provides stable 2.500 V reference for ADC conversion and sensor excitation. Use Value: 9 ppm/°C drift and 8.25 µVp-p noise ensure <±0.005% gain error and <1 LSB noise floor over temperature. |
Use Scenario: Low-power wearable ECG front-end with integrated instrumentation amplifier and SAR ADC. IC Role / Device Role / Timing Role: Supplies precise 2.500 V reference for ADC and programmable gain stage calibration. Use Value: 190 µA quiescent current extends battery life beyond 3 months; TRIM pin enables factory calibration to <±0.1% total error. |
| Industrial Loop-Powered Transmitters | Automotive Cabin Air Quality Sensors |
Use Scenario: 4–20 mA transmitter with HART modulation, operating from 12–42 V loop supply. IC Role / Device Role / Timing Role: Generates stable 2.500 V reference for microcontroller ADC and analog sensor conditioning. Use Value: 300 mV dropout allows direct regulation from 2.8 V auxiliary rail derived from loop supply; 50 ppm long-term stability minimizes recalibration frequency. |
Use Scenario: NDIR CO₂ sensor module in automotive HVAC control unit, operating across −40°C to +125°C ambient. IC Role / Device Role / Timing Role: Supplies 2.500 V reference for photodiode TIA and 16-bit ADC in harsh thermal environment. Use Value: B-grade 9 ppm/°C coefficient and −40°C to +125°C rating ensure <±0.015% reference error over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3325AIDBZR | 2.5 V, ±0.2% initial accuracy (±5 mV), 10 ppm/°C, 50 µA IQ, 5 mA sourcing only | Lacks sinking capability and has higher noise (12 µVp-p) - unsuitable for bidirectional biasing or ultra-low-noise designs | Choose REF3325AIDBZR only if ultra-low quiescent current (<50 µA) is prioritized over noise and sink capability |
| ADR3425ARJZ-R7 | 2.5 V, ±0.1% (±2.5 mV), 3 ppm/°C, 100 µA IQ, 10 mA sourcing only, requires 1 µF output cap | Higher precision and lower drift but needs external capacitor and cannot sink current - increases BOM and layout complexity | Choose ADR3425ARJZ-R7 when <±2.5 mV absolute accuracy and sub-5 ppm/°C drift justify added capacitor and loss of sink function |
Compared with REF3325AIDBZR and ADR3425ARJZ-R7, the ADR361BUJZ-R2 uniquely balances ±3 mV accuracy, 9 ppm/°C drift, 8.25 µVp-p noise, and bidirectional current drive in a no-capacitor TSOT package - making it optimal for space-constrained, battery-operated precision systems requiring both sourcing and sinking.
Availability
ADR361BUJZ-R2 is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical instruments, and industrial process controls requiring stable component supply with guaranteed long-term availability and traceable lot-level documentation.
Supply support for ADR361BUJZ-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 ADR36x family was engineered to deliver precision voltage references with ultralow noise, micropower operation, and no-external-capacitor simplicity for portable, medical, and industrial measurement systems.
FAQ
What is the operating temperature range for ADR361BUJZ-R2?
The ADR361BUJZ-R2 is rated for −40°C to +125°C operation (B grade). This range is validated per Analog Devices' ADR360/ADR361/ADR363/ADR364/ADR365/ADR366 datasheet Rev. E, Table 3, and supports industrial and extended-temperature applications without derating. The device maintains specified accuracy and noise performance across this full range.
Does ADR361BUJZ-R2 require an external output capacitor?
No, the ADR361BUJZ-R2 does not require an external output capacitor for stability. Its internal design eliminates the need for external compensation, as confirmed in the General Description and Applications Information sections of the Rev. E datasheet. This simplifies layout and reduces BOM count while maintaining fast turn-on settling (25 µs).
Can ADR361BUJZ-R2 sink current, and how much?
Yes, the ADR361BUJZ-R2 can sink up to −1 mA, as specified in Table 3 (ADR361 Electrical Characteristics) of the Rev. E datasheet under "OUTPUT CURRENT". This sink capability enables active biasing of op-amp inputs, current-mode DAC references, and trimming networks - a key differentiator versus many competing references.
What is the purpose of the TRIM pin on ADR361BUJZ-R2?
The TRIM pin (Pin 5) on ADR361BUJZ-R2 allows fine adjustment of the output voltage using an external resistor divider. As described in Table 10 (Pin Function Descriptions) and Figure 2 of the Rev. E datasheet, it provides sensitivity of approximately 100 ppm/mV, enabling factory calibration to achieve tighter system-level accuracy than the ±3 mV initial tolerance alone.
How does ADR361BUJZ-R2 achieve low ground noise sensitivity?
The ADR361BUJZ-R2 achieves low ground noise sensitivity by referencing its band gap core to VOUT rather than ground - a proprietary architecture detailed in the Theory of Operation section (Page 18) of the Rev. E datasheet. This topology attenuates ground-line noise before it appears at the output, improving PSRR and measurement integrity in noisy mixed-signal environments.
ADR361BUJZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.12%
- Temperature Coefficient:
- 9ppm/°C
- Noise - 0.1Hz to 10Hz:
- 8.25µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.8V ~ 15V
- Current - Supply:
- 190µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
ADR361BUJZ-R2 FAQ
1.How can I place an order for ADR361BUJZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR361BUJZ-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 ADR361BUJZ-R2 reliable?
The price and inventory of ADR361BUJZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR361BUJZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR361BUJZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR361BUJZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR361BUJZ-R2?
ADR361BUJZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR361BUJZ-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 ADR361BUJZ-R2?
For technical support, including ADR361BUJZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR361BUJZ-R2 requirements.
6.How does Aetrix verify that ADR361BUJZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR361BUJZ-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 ADR361BUJZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR361BUJZ-R2?
All ADR361BUJZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR361BUJZ-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 ADR361BUJZ-R2 part is unused and in its original packaging.
Return procedure for ADR361BUJZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR361BUJZ-R2 Tags
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