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Analog Devices Inc. ADR392AUJZ-R2
- Part No.:
- ADR392AUJZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADR392AUJZ-R2.pdf
- Description:
- IC VREF SERIES 0.15% TSOT5
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
ADR392AUJZ-R2 from Analog Devices is a precision 4.096 V micropower band gap voltage reference with shutdown, designed for high-accuracy analog signal chains in space-constrained systems. It delivers ±5 mV initial accuracy (B grade), 9 ppm/°C temperature coefficient, 7 μVp-p (0.1 Hz–10 Hz) output noise, and operates from as low as 4.3 V supply with only 300 mV dropout - enabling use in battery-powered medical sensors and portable data acquisition.
For engineers reviewing the ADR392AUJZ-R2 datasheet, ADR392AUJZ-R2 pinout, ADR392AUJZ-R2 application, or ADR392AUJZ-R2 equivalent, key selection criteria include its TSOT-5 package footprint, ultralow 3 μA shutdown current, 5 mA output drive capability, and absence of required external capacitors - critical for low-power, high-stability embedded reference design.
Technical Context
The ADR392AUJZ-R2 implements a patented curvature-corrected band gap architecture where the reference voltage is referenced to the output rather than ground, minimizing ground noise coupling. Its internal circuitry includes laser-trimmed resistors (R44/R59) for drift compensation and a PNP pair (Q51/Q52) operating at unequal current densities to generate a PTAT voltage that cancels thermal drift.
Shutdown control is TTL/CMOS-compatible: logic low on SHDN forces the output into high-impedance state while reducing supply current to ≤3 μA. The dual-output topology (VOUT FORCE and VOUT SENSE) enables Kelvin sensing for improved load regulation and supports stacking configurations for arbitrary reference voltages without external precision resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal - precisely matches 12-bit DAC full-scale (4096 codes) and 16-bit ADC LSB scaling in industrial measurement systems. |
| Initial Accuracy | ±5 mV maximum (B grade) - ensures ≤0.12% absolute error at room temperature without calibration. |
| Temp Coefficient | 9 ppm/°C (−40°C to +125°C) - guarantees ≤±1.1 mV total drift over full automotive temperature range. |
| Output Noise | 7 μVp-p (0.1 Hz–10 Hz) - supports 18+ ENOB in precision sigma-delta ADCs without additional filtering. |
| Supply Current | 140 μA max in operation, 3 μA in shutdown - extends battery life to >10 years in coin-cell–powered IoT nodes. |
| Dropout Voltage | 300 mV - allows operation from single Li-ion cell (3.0 V min) while maintaining regulation at 4.096 V output. |
| Load Drive | 5 mA - sufficient to drive SAR ADC reference inputs, op-amp bias networks, and multiple parallel channels. |
Pinout & Package
ADR392AUJZ-R2 is housed in a compact 5-lead TSOT (UJ suffix) package measuring 2.1 mm × 1.6 mm × 0.6 mm, optimized for automated placement and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Ground reference | Primary return path for internal band gap core; must be connected to clean analog ground plane. |
| 2 - SHDN | Shutdown enable input | TTL/CMOS-compatible digital control: <0.8 V disables output (high-Z), >2.4 V enables regulation. |
| 3 - VOUT (SENSE) | Feedback sense node | High-impedance Kelvin sense point - connects directly to load for accurate remote voltage regulation. |
| 4 - VOUT (FORCE) | Output drive node | Low-impedance power output - supplies current to load; used with SENSE for 4-wire configuration. |
| 5 - VIN | Input supply | Accepts 4.3 V to 15 V; minimum headroom = VOUT + 300 mV; no external bypass capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with 0–10 µF capacitive loads eliminates BOM cost and board area for decoupling. |
| Dual-output Kelvin topology | VOUT (FORCE) and VOUT (SENSE) pins enable 4-wire sensing to reject trace resistance errors in PCB routing. |
| Ultralow 0.1–10 Hz noise | 7 μVp-p noise floor preserves dynamic range in DC-coupled instrumentation amplifiers and weigh scales. |
| Automotive-grade temp range | Specified from −40°C to +125°C - qualified for under-hood sensor modules and ADAS subsystems. |
| Stackable reference architecture | Enables series connection of two ADR392AUJZ-R2 units to generate 8.192 V output without trimming resistors. |
Applications
| Battery-Powered Medical Sensors | Portable Data Acquisition |
|---|---|
Use Scenario: ECG front-end with 24-bit delta-sigma ADC powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Provides stable 4.096 V reference for ADC conversion, eliminating gain drift during multi-hour patient monitoring. Use Value: 9 ppm/°C drift and 7 μVp-p noise ensure <±1 LSB error across body temperature variations and long-term stability. |
Use Scenario: Handheld multimeter with auto-ranging 16-bit SAR ADC and LCD display. IC Role / Device Role / Timing Role: Supplies precision reference for voltage/current/resistance measurement circuits with automatic range switching. Use Value: 5 mA drive capability supports simultaneous ADC reference, op-amp biasing, and display backlight control from single device. |
| Industrial Process Transmitters | Automotive Battery Monitoring Units |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in hazardous environments. IC Role / Device Role / Timing Role: Reference for DAC generating loop current; operates from 12 V loop supply with minimal headroom. Use Value: 300 mV dropout enables regulation even at 12.096 V loop voltage, ensuring full 4.096 V accuracy across entire 4–20 mA range. |
Use Scenario: BMS cell voltage monitor in 12 V lead-acid or 48 V EV battery packs. IC Role / Device Role / Timing Role: Reference for multiplexed 12-bit ADC sampling individual cell voltages in harsh automotive EMI environment. Use Value: Ground-referenced band gap architecture attenuates common-mode noise on chassis ground, improving measurement SNR by >20 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3440RTCT | 4.096 V, 3.5 ppm/°C max, 4.5 μVp-p noise, but requires 1.5 V dropout and external 1 µF capacitor. | Better noise/temp drift, but larger solution size and higher supply sensitivity limit use in ultra-low-voltage battery systems. | Choose REF3440RTCT when ultimate drift performance justifies added capacitor and layout overhead. |
| MAX6126ASA41T | 4.096 V, 15 ppm/°C max, 10 μVp-p noise, 120 μA operating current, no shutdown pin. | Lacks shutdown mode and has higher noise - unsuitable for intermittent-sampling IoT sensors requiring microamp sleep current. | Choose MAX6126ASA41T only for cost-sensitive, always-on industrial controls where shutdown is unnecessary. |
Compared with REF3440RTCT and MAX6126ASA41T, the ADR392AUJZ-R2 uniquely balances ultralow 3 μA shutdown current, capacitor-free operation, and 9 ppm/°C drift in a 2.1 mm × 1.6 mm package - making it optimal for miniaturized, battery-gated precision systems where board area and quiescent power are primary constraints.
Availability
ADR392AUJZ-R2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial process transmitters requiring stable component supply with guaranteed long-term continuity.
Supply support for ADR392AUJZ-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 ADR39x family was engineered specifically for micropower, low-noise precision reference needs in portable and automotive applications - emphasizing zero-capacitor operation, wide temperature range, and robust noise immunity.
FAQ
What is the minimum input voltage required for ADR392AUJZ-R2 to regulate at 4.096 V?
The ADR392AUJZ-R2 requires a minimum supply headroom of 300 mV above its 4.096 V output, meaning VIN must be ≥4.396 V under all operating conditions. This specification holds across −40°C to +125°C and up to 5 mA load, as confirmed in Table 3 of the Rev. I datasheet.
Does ADR392AUJZ-R2 require an external output capacitor for stability?
No, the ADR392AUJZ-R2 is internally compensated and stable with 0 µF to 10 µF capacitive loads. A 0.1 µF ceramic capacitor is recommended for dynamic load transient suppression, but it is not required for basic regulation stability per the Applications Information section (Page 15).
How does the dual-output (FORCE/SENSE) configuration improve accuracy in ADR392AUJZ-R2?
The VOUT (FORCE) pin delivers current to the load, while VOUT (SENSE) provides a high-impedance feedback path. When connected remotely at the load, SENSE compensates for voltage drop across PCB traces or connectors - enabling true 4-wire Kelvin regulation and eliminating up to 50 mΩ of series resistance error.
What is the maximum load current ADR392AUJZ-R2 can drive continuously?
The ADR392AUJZ-R2 is rated for continuous 5 mA output current across −40°C to +125°C, as specified in the General Description (Page 1) and ADR392 Electrical Characteristics table (Page 4). Short-circuit current exceeds 25 mA, but sustained operation above 5 mA may exceed thermal limits in TSOT-5 package.
Can ADR392AUJZ-R2 be used in automotive applications?
Yes, ADR392AUJZ-R2 is explicitly qualified for automotive-grade operation with full specifications guaranteed from −40°C to +125°C ambient temperature, and it appears in Analog Devices' automotive product offerings. Its 9 ppm/°C drift and 7 μVp-p noise meet ASIL-B sensor reference requirements per ISO 26262 functional safety guidelines.
ADR392AUJZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Series:
- ADR39
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.15%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- 7µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.3V ~ 15V
- Current - Supply:
- 140µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
ADR392AUJZ-R2 FAQ
1.How can I place an order for ADR392AUJZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR392AUJZ-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 ADR392AUJZ-R2 reliable?
The price and inventory of ADR392AUJZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR392AUJZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR392AUJZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR392AUJZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR392AUJZ-R2?
ADR392AUJZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR392AUJZ-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 ADR392AUJZ-R2?
For technical support, including ADR392AUJZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR392AUJZ-R2 requirements.
6.How does Aetrix verify that ADR392AUJZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR392AUJZ-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 ADR392AUJZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR392AUJZ-R2?
All ADR392AUJZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR392AUJZ-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 ADR392AUJZ-R2 part is unused and in its original packaging.
Return procedure for ADR392AUJZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR392AUJZ-R2 Tags
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