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Analog Devices Inc. ADR390AUJZ-REEL7
- Part No.:
- ADR390AUJZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADR390AUJZ-REEL7.pdf
- Description:
- IC VREF SERIES PREC TSOT-23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
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Product details
Overview
ADR390AUJZ-REEL7 from Analog Devices is a micropower, low-noise 2.048 V precision band gap voltage reference with shutdown control, 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–10 Hz) output noise, and operates from as low as 2.5 V supply with only 300 mV dropout. It is used in battery-powered data acquisition front-ends where stable excitation and low drift are critical.
For engineers reviewing the ADR390AUJZ-REEL7 datasheet, ADR390AUJZ-REEL7 pinout, ADR390AUJZ-REEL7 application, or ADR390AUJZ-REEL7 equivalent, this page provides verified specifications, TSOT-5 package layout, real-world use cases in portable instrumentation, and validated alternative options for design flexibility and supply continuity.
Technical Context
The ADR390AUJZ-REEL7 implements a curvature-corrected band gap core referenced to the output (not ground), enabling superior ground noise rejection. Its patented trimming and resistor ratio techniques achieve 9 ppm/°C max drift over −40°C to +125°C.
It features dual-output terminals-VOUT (FORCE) and VOUT (SENSE)-supporting Kelvin sensing for load regulation accuracy, and a TTL/CMOS-compatible SHDN pin that reduces quiescent current to 3 μA while placing the output in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; enables precise 12-bit ADC full-scale calibration without gain trimming. |
| Initial Accuracy | ±4 mV (B grade); ensures ≤0.2% absolute error at power-up before system calibration. |
| Temp. Coefficient | 9 ppm/°C max; contributes <±1.1 mV drift over −40°C to +125°C ambient range. |
| Output Noise | 5 μVp-p (0.1 Hz–10 Hz); supports <16-bit effective resolution in low-frequency sensor interfaces. |
| Supply Current | 120 μA typical operating / 3 μA shutdown; extends battery life in intermittent-sampling devices. |
| Dropout Voltage | 300 mV min headroom; allows operation from single-cell Li-ion (3.0 V) down to 2.348 V under load. |
| Load Current | 5 mA max; drives SAR ADC reference inputs, op-amp bias networks, and small DACs directly. |
Pinout & Package
ADR390AUJZ-REEL7 is housed in a 5-lead TSOT (UJ) package - 2.1 mm × 2.3 mm × 0.9 mm, surface-mount, moisture-sensitive level 1. Pin 1 is marked by a dot; pin numbering follows standard TSOT counterclockwise orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Primary return path for internal band gap core and output stage; must be low-impedance connection. |
| 2: SHDN | Shutdown control input | TTL/CMOS-compatible logic input; <0.8 V = shutdown (3 μA IQ), >2.4 V = active. |
| 3: VOUT (SENSE) | Sense feedback node | Connects to load-side of external impedance; enables remote sensing to cancel trace IR drop. |
| 4: VOUT (FORCE) | Force output terminal | Drives load directly; paired with SENSE for 4-wire Kelvin regulation under varying load conditions. |
| 5: VIN | Power input | Accepts 2.5 V to 15 V; minimum 300 mV above VOUT required for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with 0–10 μF capacitive loads; eliminates BOM cost and board area for decoupling. |
| Ultralow output noise | 5 μVp-p (0.1 Hz–10 Hz) enables high-resolution weigh scale and medical ECG front-ends. |
| Low dropout operation | 300 mV headroom supports direct regulation from single-cell batteries without LDO pre-regulation. |
| Wide temperature range | −40°C to +125°C operation qualifies for automotive cabin and industrial field equipment. |
| Shutdown mode | 3 μA supply current in shutdown; ideal for wake-on-event sensor nodes with microcontroller-controlled bias. |
Applications
| Battery-Powered Data Acquisition | Portable Medical Instrumentation |
|---|---|
Use Scenario: Handheld multimeter measuring DC voltage with 16-bit SAR ADC and auto-ranging. IC Role / Device Role / Timing Role: Precision 2.048 V reference for ADC full-scale calibration and analog front-end gain setting. Use Value: ±4 mV initial accuracy and 9 ppm/°C drift ensure measurement repeatability across temperature without recalibration. |
Use Scenario: Portable ECG monitor acquiring biopotential signals with low-noise instrumentation amplifier. IC Role / Device Role / Timing Role: Low-noise voltage reference for biasing amplifier stages and ADC reference input. Use Value: 5 μVp-p (0.1 Hz–10 Hz) noise floor preserves microvolt-level ST-segment fidelity during quiet patient monitoring. |
| Industrial Process Control Sensors | Automotive Cabin Monitoring Systems |
Use Scenario: Loop-powered 4–20 mA transmitter with HART modulation, using internal ADC for diagnostics. IC Role / Device Role / Timing Role: Stable excitation source for RTD/thermistor bridges and ADC reference in harsh 4–20 mA loop. Use Value: −40°C to +125°C operation and 140 ppm/mA load regulation maintain accuracy despite wide load current swings. |
Use Scenario: Occupant detection module with capacitive sensing and microcontroller-based signal processing. IC Role / Device Role / Timing Role: Reference for analog sensor interface and internal ADC used in proximity and pressure sensing. Use Value: Shutdown mode reduces system standby current to <10 μA; TSOT-5 footprint fits tight PCB layouts near sensors. |
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, 3 ppm/°C max TC, 12 μA IQ, no shutdown, MSOP-8 package | Higher accuracy but no shutdown; requires larger footprint and higher quiescent current | Select when ultra-low drift dominates over power savings and board area constraints. |
| REF3320AIDBVR | 2.048 V, 10 ppm/°C max TC, 6 μA IQ, no shutdown, SOT-23-3 package | Limited to 3-pin configuration (no Kelvin sense), lower max load (5 mA same), no SHDN | Choose for cost-sensitive, non-Kelvin, always-on applications where 3-pin simplicity outweighs shutdown capability. |
Compared with ADR390AUJZ-REEL7, ADR3420ARMZ-R7 offers tighter drift but sacrifices micropower shutdown and compact TSOT-5 size, while REF3320AIDBVR trades Kelvin sensing and shutdown for lower cost and smaller 3-pin footprint-making ADR390AUJZ-REEL7 optimal for battery-operated, high-accuracy, space-limited designs requiring dynamic power control.
Availability
ADR390AUJZ-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 long production lifecycles.
Supply support for ADR390AUJZ-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 ADR390AUJZ-REEL7 belongs to the ADR39x family of micropower, low-noise, shutdown-capable voltage references engineered for precision, low-power, and small-footprint applications in portable and harsh-environment electronics.
FAQ
What is the output voltage tolerance and grade designation for ADR390AUJZ-REEL7?
The ADR390AUJZ-REEL7 is a B-grade device with a nominal output voltage of 2.048 V and an initial accuracy of ±4 mV (±0.19%) at 25°C. This grade is confirmed in Table 1 and the ADR390 Electrical Characteristics section (Page 3) of Rev. G datasheet, where B-grade VOERR is specified as 4 mV maximum.
Does ADR390AUJZ-REEL7 require an external output capacitor for stability?
No, ADR390AUJZ-REEL7 does not require an external output capacitor for stability-it is internally compensated and remains stable with capacitive loads from 0 μF to 10 μF. A 0.1 μF ceramic capacitor is recommended for dynamic load transient suppression, but it is not mandatory for basic regulation.
What is the shutdown behavior of ADR390AUJZ-REEL7, and how is the SHDN pin driven?
When the SHDN pin is pulled low (<0.8 V), ADR390AUJZ-REEL7 enters shutdown mode, reducing supply current to ≤3 μA and placing the VOUT (FORCE) and VOUT (SENSE) terminals in high-impedance state. The pin is TTL/CMOS-compatible; connect to VIN if shutdown is unused.
Can ADR390AUJZ-REEL7 drive a 5 mA load across its full temperature range?
Yes, ADR390AUJZ-REEL7 is rated for 5 mA continuous output current over −40°C to +125°C. Load regulation is specified as 140 ppm/mA under those conditions (VIN = 3 V), corresponding to ~285 μV change per mA at 2.048 V-within design margins for most precision applications.
What package type and dimensions does ADR390AUJZ-REEL7 use?
ADR390AUJZ-REEL7 uses the 5-lead TSOT (UJ) package: 2.1 mm × 2.3 mm × 0.9 mm body size, with 0.95 mm lead pitch. This is explicitly stated in the "Outline Dimensions" section (Page 19) and Figure 1 of the Rev. G datasheet.
ADR390AUJZ-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
ADR390AUJZ-REEL7 FAQ
1.How can I place an order for ADR390AUJZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR390AUJZ-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 ADR390AUJZ-REEL7 reliable?
The price and inventory of ADR390AUJZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR390AUJZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR390AUJZ-REEL7?
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4.How is shipping managed for ADR390AUJZ-REEL7?
ADR390AUJZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR390AUJZ-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 ADR390AUJZ-REEL7?
For technical support, including ADR390AUJZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR390AUJZ-REEL7 requirements.
6.How does Aetrix verify that ADR390AUJZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR390AUJZ-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 ADR390AUJZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR390AUJZ-REEL7?
All ADR390AUJZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR390AUJZ-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 ADR390AUJZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR390AUJZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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