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Analog Devices Inc. ADR395BUJZ-R2
- Part No.:
- ADR395BUJZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ADR395BUJZ-R2.pdf
- Description:
- IC VREF SERIES 0.1% TSOT5
- Quantity:
- Payment:
- Shipping:
Inventory:1,697
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Product details
Overview
ADR395BUJZ-R2 from Analog Devices is a precision 5.0 V band gap voltage reference IC with micropower operation, ultralow 8 μVp-p (0.1 Hz to 10 Hz) output noise, 9 ppm/°C temperature coefficient (B grade), and integrated shutdown control. It delivers up to 5 mA output current with only 300 mV dropout and operates from −40°C to +125°C, making it suitable for high-accuracy analog signal chains in portable medical instrumentation.
For engineers reviewing the ADR395BUJZ-R2 datasheet, ADR395BUJZ-R2 pinout, ADR395BUJZ-R2 application, or ADR395BUJZ-R2 equivalent, key selection criteria include initial accuracy (±5 mV), low quiescent current (140 μA max), TSOT-5 package footprint, and shutdown logic compatibility (TTL/CMOS).
Technical Context
The ADR395BUJZ-R2 uses patented temperature drift curvature correction to achieve 9 ppm/°C TC over −40°C to +125°C. Its dual-output architecture separates FORCE and SENSE pins to reject ground noise and maintain regulation under dynamic load conditions.
It operates as a low-dropout (300 mV) shunt-regulated band gap reference with no external capacitor required. Shutdown mode reduces supply current to 3 μA while placing VOUT in high-impedance state, and logic thresholds are defined at VINL = 0.8 V (low) and VINH = 2.4 V (high).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal; B-grade min/max = 4.995 V / 5.005 V - ensures ADC/DAC reference stability within ±0.1% full-scale error. |
| Temp Coefficient | 9 ppm/°C (B grade); ≤90 ppm total drift over −40°C to +125°C - enables <0.01% gain error drift in precision sensor interfaces. |
| Initial Accuracy | ±5 mV (B grade); ±0.10% of 5 V - supports 16-bit system accuracy without calibration. |
| Output Noise | 8 μVp-p (0.1 Hz to 10 Hz) - critical for low-frequency measurement systems like weigh scales and ECG front-ends. |
| Quiescent Current | 140 μA max (active); 3 μA max (shutdown) - extends battery life in multiday portable devices. |
| Dropout Voltage | 300 mV - allows operation from single Li-ion cell (3.0 V min) while delivering 5 V reference. |
| Load Current | 5 mA max - sufficient to drive SAR ADC references, op-amp bias networks, and small DACs directly. |
Pinout & Package
ADR395BUJZ-R2 is housed in a compact 5-lead TSOT (UJ suffix) package, 1.6 mm × 1.6 mm × 0.55 mm, with exposed pad for thermal performance (θJA = 230°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: GND | Ground reference | Primary return path for internal band gap core; must be low-impedance connection to minimize noise coupling. |
| 2: SHDN | Shutdown control input | TTL/CMOS-compatible digital input; logic low (≤0.8 V) disables output and reduces current to 3 μA. |
| 3: VOUT (SENSE) | Regulated output sense node | Feedback point for internal error amplifier; connects directly to load for highest accuracy regulation. |
| 4: VOUT (FORCE) | Output drive node | Delivers output current; used with SENSE pin in Kelvin configuration to eliminate trace IR drop errors. |
| 5: VIN | Supply input | Accepts 5.3 V to 15 V; minimum headroom = 300 mV above 5 V output for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with 0–10 μF capacitive loads; eliminates board space and cost of bypass caps in space-constrained designs. |
| Dual-output Kelvin sensing | Separate FORCE and SENSE pins enable true 4-wire regulation, removing PCB trace resistance impact on reference accuracy. |
| Ultralow 0.1–10 Hz noise | 8 μVp-p noise floor supports sub-μV resolution measurements in DC-coupled instrumentation amplifiers. |
| Automotive-grade temp range | −40°C to +125°C operation qualified per AEC-Q100 stress test requirements for under-hood applications. |
| Low dropout & micropower | 300 mV dropout + 140 μA supply current enables direct use from single-cell batteries in handheld test equipment. |
Applications
| Portable Medical Instrumentation | Battery-Powered Data Acquisition |
|---|---|
Use Scenario: ECG front-end reference for 24-bit delta-sigma ADC in wearable cardiac monitor. IC Role / Device Role / Timing Role: Precision 5 V reference for ADC voltage scaling and op-amp biasing. Use Value: 9 ppm/°C TC and 8 μVp-p noise ensure <1 LSB error across body temperature range and low-frequency bio-signals. | Use Scenario: Reference for multi-channel thermocouple logger powered by two AA cells. IC Role / Device Role / Timing Role: Stable 5 V source for cold-junction compensation and ADC reference. Use Value: 300 mV dropout allows operation down to 3.0 V input; 140 μA quiescent current enables >1-year battery life. |
| Industrial Process Control Sensors | Automotive Cabin Air Quality Modules |
Use Scenario: Reference for 4–20 mA transmitter IC in hazardous-area pressure transmitters. IC Role / Device Role / Timing Role: Primary voltage reference for loop-powered signal conditioning circuitry. Use Value: −40°C to +125°C rating and 5 mA drive capability support operation in extreme ambient environments without derating. | Use Scenario: Reference for CO₂ and VOC sensor signal chain in automotive HVAC control unit. IC Role / Device Role / Timing Role: 5 V precision reference for analog front-end and microcontroller ADC. Use Value: Automotive-grade qualification and 3 μA shutdown current reduce standby power during vehicle sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR395AUJZ-R2 | A-grade: ±6 mV initial accuracy, 25 ppm/°C TC vs. B-grade's ±5 mV and 9 ppm/°C | Suitable where wider tolerance and higher drift acceptable for cost-sensitive industrial controls | Select ADR395AUJZ-R2 only if system calibration compensates for initial error and temperature drift. |
| REF5050IDR | 5 V, 3 ppm/°C TC, 4 μVp-p noise, but 1.2 mA quiescent current and SOIC-8 package | Better stability/noise, but incompatible with ultra-low-power or space-constrained designs | Choose REF5050IDR only when long-term stability and lower noise outweigh battery life and PCB area constraints. |
Compared with ADR395AUJZ-R2, the ADR395BUJZ-R2 offers tighter initial accuracy and lower temperature drift at identical package and pinout; versus REF5050IDR, it trades off absolute stability for 93% lower operating current and 60% smaller footprint.
Availability
ADR395BUJZ-R2 is available at Aetrix Electronics and suitable for portable medical instrumentation, battery-powered data acquisition systems, and industrial process controls requiring stable component supply with guaranteed long-term availability.
Supply support for ADR395BUJZ-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 designed specifically for micropower, low-noise, high-accuracy voltage reference applications in battery-operated and space-constrained systems across medical, industrial, and automotive markets.
FAQ
What is the maximum load current supported by the ADR395BUJZ-R2?
The ADR395BUJZ-R2 supports a maximum output current of 5 mA under all operating conditions specified in the datasheet. This value is validated across −40°C to +125°C and with input voltages from 5.3 V to 15 V. Exceeding 5 mA may cause output voltage deviation beyond the specified load regulation limit of 140 ppm/mA.
Does the ADR395BUJZ-R2 require an external output capacitor for stability?
No, the ADR395BUJZ-R2 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 at the VOUT (SENSE) pin to improve transient response under dynamic load conditions, but it is not mandatory for basic regulation.
How does the dual-output (FORCE/SENSE) configuration improve accuracy in the ADR395BUJZ-R2?
The ADR395BUJZ-R2 uses separate FORCE and SENSE pins to implement a Kelvin connection. The SENSE pin provides feedback to the internal error amplifier, while the FORCE pin delivers current. This arrangement eliminates voltage drop errors caused by PCB trace resistance between the reference and load, maintaining ±5 mV initial accuracy even with 100 mΩ series impedance.
What is the shutdown behavior of the ADR395BUJZ-R2?
When the SHDN pin is pulled low (≤0.8 V), the ADR395BUJZ-R2 enters shutdown mode, reducing supply current to ≤3 μA and placing the VOUT (FORCE) and VOUT (SENSE) nodes in high-impedance state. Output voltage is no longer regulated and becomes dependent on external circuitry. The device resumes normal operation within 20 μs after SHDN rises above 2.4 V.
Can the ADR395BUJZ-R2 operate from a 3.3 V supply?
No, the ADR395BUJZ-R2 requires a minimum supply voltage of 5.3 V to maintain regulation at its 5.0 V output due to its 300 mV dropout specification. A 3.3 V supply is insufficient and will result in unregulated output. For 3.3 V systems, consider the ADR391 (2.5 V output) or ADR392 (4.096 V output), both of which support lower input voltages.
ADR395BUJZ-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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 9ppm/°C
- Noise - 0.1Hz to 10Hz:
- 8µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 5.3V ~ 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
ADR395BUJZ-R2 FAQ
1.How can I place an order for ADR395BUJZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR395BUJZ-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 ADR395BUJZ-R2 reliable?
The price and inventory of ADR395BUJZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR395BUJZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR395BUJZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR395BUJZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR395BUJZ-R2?
ADR395BUJZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR395BUJZ-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 ADR395BUJZ-R2?
For technical support, including ADR395BUJZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR395BUJZ-R2 requirements.
6.How does Aetrix verify that ADR395BUJZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR395BUJZ-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 ADR395BUJZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR395BUJZ-R2?
All ADR395BUJZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR395BUJZ-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 ADR395BUJZ-R2 part is unused and in its original packaging.
Return procedure for ADR395BUJZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR395BUJZ-R2 Tags
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