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Analog Devices Inc. ADR390BUJZ-REEL7
- Part No.:
- ADR390BUJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADR390BUJZ-REEL7.pdf
- Description:
- IC VREF SERIES PREC TSOT-23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,512
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Product details
Overview
ADR390BUJZ-REEL7 from Analog Devices is a precision 2.048 V micropower band gap voltage reference with shutdown, designed for high-accuracy analog signal chains in space-constrained systems. It delivers ±4 mV initial accuracy (B grade), 9 ppm/°C temperature coefficient, 5 μVp-p (0.1 Hz to 10 Hz) output noise, and operates from as low as 2.5 V supply with only 300 mV dropout - enabling use in battery-powered medical sensors and portable data acquisition.
For engineers reviewing the ADR390BUJZ-REEL7 datasheet, ADR390BUJZ-REEL7 pinout, ADR390BUJZ-REEL7 application, or ADR390BUJZ-REEL7 equivalent, this page provides verified specifications, TSOT-5 package layout, real-world load/line regulation behavior, and validated alternative options for low-power, high-stability reference design.
Technical Context
The ADR390BUJZ-REEL7 implements a curvature-corrected band gap core referenced to the output (not ground), providing inherent ground-noise rejection. Its patented trimming and resistor ratio techniques achieve 9 ppm/°C drift over −40°C to +125°C while maintaining ultralow 5 μVp-p noise in the 0.1 Hz–10 Hz band.
It features dual-output terminals (VOUT FORCE and VOUT SENSE) for Kelvin sensing, supports 0–10 μF capacitive loads without instability, and enters 3 μA shutdown mode via TTL/CMOS-compatible SHDN pin - eliminating need for external bypass capacitors or power sequencing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC full-scale calibration at 2.048 V input range. |
| Initial Accuracy | ±4 mV max (B grade); corresponds to ±0.19% error - sufficient for 12-bit system accuracy without trimming. |
| Temp. Coefficient | 9 ppm/°C (−40°C to +125°C); contributes ≤1.1 mV drift over full industrial range - critical for unheated sensor front-ends. |
| Output Noise | 5 μVp-p (0.1 Hz–10 Hz); supports <16-bit effective resolution in low-frequency measurement systems. |
| Supply Current | 120 μA typical operating / 3 μA shutdown; extends battery life >10 years in 10 μA average-current IoT nodes. |
| Dropout Voltage | 300 mV min headroom; allows direct operation from single-cell Li-ion (3.0 V min) or two alkaline cells (2.4 V min). |
| Load Current | 5 mA max; drives SAR ADC reference inputs, op-amp bias networks, and small DAC buffers without gain error. |
Pinout & Package
ADR390BUJZ-REEL7 is housed in a compact 5-lead TSOT (UJ) package, 2.1 mm × 1.6 mm × 0.55 mm, with exposed pad for thermal enhancement (θJA = 230°C/W). Pin 1 is marked by dot; pin order is GND–SHDN–VIN–VOUT(FORCE)–VOUT(SENSE).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Low-impedance return path; must be connected directly to PCB ground plane under device for noise immunity. |
| SHDN | Shutdown control input | TTL/CMOS-compatible logic input; ≤0.8 V disables output (high-Z), ≥2.4 V enables regulation. |
| VIN | Power supply input | Accepts 2.5 V to 15 V; minimum 300 mV above VOUT required for regulation - no reverse-voltage protection. |
| VOUT (FORCE) | Main output driver | Delivers regulated 2.048 V to load; connects to high-current paths (e.g., ADC REF pin, op-amp non-inverting input). |
| VOUT (SENSE) | Feedback sense node | Provides Kelvin connection to internal error amplifier; ties directly to load-side reference point to cancel trace IR drop. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with 0–10 μF output capacitance - eliminates BOM cost, board area, and ESR sensitivity in portable designs. |
| Dual-output Kelvin configuration | VOUT(FORCE)/VOUT(SENSE) separation enables accurate remote sensing - essential for PCB traces >50 mΩ or noisy digital grounds. |
| Ultralow 0.1–10 Hz noise | 5 μVp-p enables sub-μV offset stability in precision weigh scales and thermocouple amplifiers. |
| Wide temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive sensors and industrial process transmitters. |
| Micropower shutdown mode | 3 μA quiescent current in shutdown - reduces standby power to <15 μW at 5 V, enabling energy harvesting compatibility. |
Applications
| Battery-Powered Medical Sensors | Portable Data Acquisition Systems |
|---|---|
Use Scenario: Continuous glucose monitor (CGM) with 16-bit ADC sampling electrochemical sensor output. IC Role / Device Role / Timing Role: Precision 2.048 V reference for ADC full-scale calibration and sensor bias generation. Use Value: ±4 mV initial accuracy and 9 ppm/°C drift ensure <0.01% total error over body temperature range (32–42°C), meeting ISO 15197 clinical accuracy requirements. |
Use Scenario: Handheld multimeter with auto-ranging 12-bit SAR ADC and dual-slope integration. IC Role / Device Role / Timing Role: Stable reference for ADC conversion and internal DAC-based autoranging circuitry. Use Value: 5 μVp-p low-frequency noise prevents digitization of thermal drift artifacts, preserving 4½-digit resolution during slow measurements. |
| Industrial Process Transmitters | Automotive Cabin Air Quality Sensors |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating at ambient −40°C to +85°C. IC Role / Device Role / Timing Role: Primary voltage reference for signal conditioning and DAC output scaling in isolated analog front-end. Use Value: Guaranteed 9 ppm/°C tempco and 140 ppm/mA load regulation up to +125°C enable factory calibration validity over full lifetime without field recalibration. |
Use Scenario: CO₂ and VOC sensor module in vehicle HVAC control unit, powered from 5 V rail with intermittent sleep cycles. IC Role / Device Role / Timing Role: Reference for NDIR detector signal chain and microcontroller ADC during wake-up bursts. Use Value: 3 μA shutdown current and fast 20 μs turn-on settling allow reference activation only during measurement windows - cutting average power by >99% vs. always-on references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR3420ARMZ-R7 | 2.048 V, ±0.1% initial accuracy (2 mV), 3 ppm/°C tempco, but 125 μA operating current and no shutdown. | Higher accuracy and lower drift, but unsuitable for ultra-low-power or duty-cycled systems due to fixed current draw. | Select when long-term stability and minimal tempco outweigh micropower needs - e.g., lab-grade instrumentation. |
| REF3320AIDBVR | 2.048 V, ±0.2% initial accuracy (4.1 mV), 10 ppm/°C tempco, 7.5 μA operating current, shutdown capable. | Lower quiescent current than ADR390BUJZ-REEL7 in active mode, but higher noise (12 μVp-p) and no Kelvin outputs. | Select when board space is tighter (SOT-23-5) and noise >8 μVp-p is acceptable - e.g., consumer wearables. |
Compared with ADR3420ARMZ-R7 and REF3320AIDBVR, the ADR390BUJZ-REEL7 uniquely balances B-grade accuracy (±4 mV), ultralow noise (5 μVp-p), Kelvin sensing, and true micropower shutdown (3 μA) - making it optimal for battery-operated precision measurement where both accuracy and energy efficiency are non-negotiable.
Availability
ADR390BUJZ-REEL7 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial process controls requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for ADR390BUJZ-REEL7 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 ADR390BUJZ-REEL7 belongs to the ADR39x family of micropower, low-dropout voltage references engineered specifically for precision, low-power, and space-constrained applications - including portable healthcare, industrial sensing, and automotive subsystems.
FAQ
What is the maximum load current supported by the ADR390BUJZ-REEL7?
The ADR390BUJZ-REEL7 supports up to 5 mA of continuous output current across its full operating temperature range (−40°C to +125°C). This is sufficient to drive most precision ADC reference inputs, op-amp bias networks, and small DACs without significant load regulation error - specified at 140 ppm/mA over −40°C to +125°C with VIN = 3 V.
Does the ADR390BUJZ-REEL7 require an external output capacitor for stability?
No, the ADR390BUJZ-REEL7 is internally compensated and remains stable with output capacitance ranging from 0 μF to 10 μF. While not required, a 0.1 μF ceramic capacitor is recommended at the VOUT(FORCE) pin to improve transient response under dynamic load conditions - especially when driving switched-capacitor ADCs or multiplexed sensor arrays.
How does the dual-output (FORCE/SENSE) configuration improve accuracy in the ADR390BUJZ-REEL7?
The VOUT(FORCE) and VOUT(SENSE) pins implement a Kelvin connection: FORCE delivers current to the load, while SENSE feeds back the actual voltage at the load point. This eliminates errors caused by voltage drop across PCB traces or interconnects - critical when routing reference signals over >2 cm or sharing ground with high-current digital sections. The ADR390BUJZ-REEL7's internal amplifier regulates based solely on the SENSE node.
What is the shutdown behavior of the ADR390BUJZ-REEL7?
When the SHDN pin is pulled ≤0.8 V (logic low), the ADR390BUJZ-REEL7 enters shutdown mode, reducing supply current to ≤3 μA and placing the VOUT(FORCE) node in high-impedance state. The output voltage is no longer regulated and will float or be determined by external circuitry. To enable operation, SHDN must be ≥2.4 V - compatible with standard CMOS/TTL logic outputs.
Is the ADR390BUJZ-REEL7 suitable for automotive applications?
Yes, the ADR390BUJZ-REEL7 is qualified for operation from −40°C to +125°C and meets key automotive reliability requirements including 1000-hour long-term stability (50 ppm shift) and robust ESD tolerance (per JEDEC JS-001). It is commonly used in cabin air quality sensors, tire pressure monitors, and ADAS subsystems where precision, low power, and temperature resilience are essential.
ADR390BUJZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- ADR39
- 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
ADR390BUJZ-REEL7 FAQ
1.How can I place an order for ADR390BUJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR390BUJZ-REEL7 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 ADR390BUJZ-REEL7 reliable?
The price and inventory of ADR390BUJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR390BUJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR390BUJZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR390BUJZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR390BUJZ-REEL7?
ADR390BUJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR390BUJZ-REEL7 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 ADR390BUJZ-REEL7?
For technical support, including ADR390BUJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR390BUJZ-REEL7 requirements.
6.How does Aetrix verify that ADR390BUJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR390BUJZ-REEL7 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 ADR390BUJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR390BUJZ-REEL7?
All ADR390BUJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR390BUJZ-REEL7, 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 ADR390BUJZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR390BUJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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