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Analog Devices Inc. ADR03BKS-R2
- Part No.:
- ADR03BKS-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADR03BKS-R2.pdf
- Description:
- IC VREF SERIES PREC 2.5V SC-70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,437
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Product details
Overview
ADR03BKS-R2 from Analog Devices is a precision 2.5 V bandgap voltage reference in a 5-lead SC70 package, designed for high-accuracy analog signal chains. It delivers ±0.1% initial accuracy, 9 ppm/°C max temperature coefficient (B grade), 5 µVp-p (0.1 Hz to 10 Hz) low-noise output, and operates from 4.5 V to 36 V supply across −40°C to +125°C - enabling use in industrial sensor front-ends and portable instrumentation.
For engineers reviewing the ADR03BKS-R2 datasheet, ADR03BKS-R2 pinout, ADR03BKS-R2 application, or ADR03BKS-R2 equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and noise performance data, and two rigorously cross-checked alternative parts for space-constrained, high-stability reference design.
Technical Context
The ADR03BKS-R2 implements a trimmed bandgap core with on-chip trimming for tight initial accuracy and low drift. Its TEMP pin provides a calibrated 550 mV baseline with 1.96 mV/°C sensitivity for external temperature monitoring, while the TRIM pin allows fine adjustment of output voltage via external resistor network.
It requires no external capacitor for stability, supports up to 10 mA output current, and maintains 70 ppm output hysteresis and 50 ppm long-term stability over 1000 hours - all within a 2.0 mm × 2.1 mm SC70 footprint optimized for PCB area-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV (B grade); enables direct interface with 12-bit+ SAR ADCs without gain calibration. |
| Initial Accuracy | ±0.1% (±2.5 mV); reduces system-level calibration burden in precision data acquisition. |
| Temp Coefficient | 9 ppm/°C max (−40°C to +125°C); ensures ≤225 ppm total drift over full industrial range. |
| Voltage Noise | 5 µVp-p, 0.1 Hz–10 Hz; contributes <0.5 LSB error in 24-bit delta-sigma ADC systems. |
| Supply Range | 4.5 V to 36 V; supports wide-input industrial power rails and battery-backed operation. |
| Quiescent Current | 0.65–1.0 mA; enables low-power operation in always-on sensor nodes and portable meters. |
| Load Current | 10 mA max; sufficient to drive ADC reference inputs, op-amp buffers, and DAC references. |
Pinout & Package
ADR03BKS-R2 is housed in a 5-lead SC70 (KS-5) package, measuring 2.0 mm × 2.1 mm × 0.9 mm, with gull-wing leads and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Reference Output | Stable 2.5 V source; low-impedance node requiring local decoupling for noise-sensitive circuits. |
| 2 - TRIM | Output Adjustment | Connects to external resistor divider for ±0.5% fine-tuning of VOUT; high-impedance input. |
| 3 - VIN | Power Input | Accepts 4.5–36 V; internal regulation rejects ripple up to −75 dB at 10 kHz. |
| 4 - TEMP | Temperature Sensor | Provides 550 mV @ 25°C with 1.96 mV/°C slope; used for board-level temperature compensation. |
| 5 - GND | Analog Ground | Must be connected to clean, low-noise ground plane; separates reference and power return paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact SC70 packaging | 2.0 mm × 2.1 mm footprint saves >60% board area vs. SOIC-8 equivalents in dense layouts. |
| No external capacitor required | Eliminates BOM cost and layout risk associated with stability capacitors in reference designs. |
| Integrated temperature sensing | TEMP pin provides factory-calibrated analog temperature output without external sensors. |
| High PSRR (−75 dB @ 10 kHz) | Rejects switching regulator noise, enabling direct use after DC/DC converters in mixed-signal systems. |
| Extended temperature range | Specified from −40°C to +125°C; qualified for industrial control, automotive body electronics, and downhole tools. |
Applications
| Industrial Process Transmitters | Precision Portable Meters |
|---|---|
Use Scenario: 4 mA to 20 mA loop-powered transmitter with HART modulation. IC Role / Device Role / Timing Role: Primary voltage reference for DAC and current-sense amplifier. Use Value: ±0.1% initial accuracy and 9 ppm/°C TC ensure <0.1% total error over temperature without field recalibration. |
Use Scenario: Handheld multimeter with 6½-digit resolution and battery operation. IC Role / Device Role / Timing Role: Stable reference for dual-slope integrator and auto-zero amplifier. Use Value: 5 µVp-p low-frequency noise prevents digit flicker; 0.65 mA quiescent current extends battery life. |
| Automotive Battery Monitoring | Medical Sensor Signal Conditioning |
Use Scenario: In-vehicle 12 V/24 V battery voltage and state-of-charge monitoring. IC Role / Device Role / Timing Role: Reference for microcontroller ADC measuring battery rail and auxiliary voltages. Use Value: Wide 4.5–36 V input range accommodates cold-crank (4.5 V) and load-dump (36 V) transients without protection circuitry. |
Use Scenario: ECG/EEG front-end with isolated ADC and low-drift amplifiers. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and sigma-delta ADC. Use Value: 50 ppm long-term stability ensures clinical-grade accuracy retention over device lifetime without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR03AKS-R2 | Higher grade: ±0.05% initial accuracy, 3 ppm/°C max TC (A grade), same SC70 package. | Required where <10 ppm total error budget demands tighter initial tolerance and lower drift. | Select ADR03AKS-R2 when system-level accuracy targets exceed ADR03BKS-R2's ±0.1% capability. |
| REF3325AIDBVR | 2.5 V, ±0.1% initial accuracy, 10 ppm/°C max TC, SOT-23-5 package; lower 3.9 µVp-p noise but only 5 mA output. | Suitable for ultra-low-power (<1 µA quiescent) or cost-sensitive designs where 10 mA drive is unnecessary. | Choose REF3325AIDBVR if supply current must be minimized below 0.65 mA or if SOT-23 footprint is preferred. |
Compared with ADR03BKS-R2, ADR03AKS-R2 improves initial accuracy and temperature drift at higher cost, while REF3325AIDBVR trades output current and PSRR for lower quiescent current and smaller die size - making each optimal for distinct accuracy, power, or drive requirements.
Availability
ADR03BKS-R2 is available at Aetrix Electronics and suitable for industrial process transmitters, portable test equipment, and automotive battery monitoring systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for ADR03BKS-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 ADR03 is part of Analog Devices' precision voltage reference product line, engineered for high-accuracy, low-drift, and low-noise operation in demanding industrial, instrumentation, and automotive applications.
FAQ
What is the maximum load current supported by the ADR03BKS-R2?
The ADR03BKS-R2 supports up to 10 mA of continuous output current while maintaining specified accuracy and thermal stability. This is sufficient to drive most precision ADC reference inputs, op-amp buffers, and low-power DACs without external amplification. Exceeding 10 mA may cause output voltage deviation beyond datasheet limits and increased self-heating.
Does the ADR03BKS-R2 require an external output capacitor for stability?
No, the ADR03BKS-R2 is internally compensated and does not require an external output capacitor for stability under any load condition within its 0–10 mA range. Adding capacitance may improve transient response but is not necessary for basic operation - simplifying layout and reducing BOM count.
Can the TEMP pin of the ADR03BKS-R2 be used for accurate temperature measurement?
Yes, the TEMP pin of the ADR03BKS-R2 provides a factory-calibrated analog output: 550 mV at 25°C with a linear sensitivity of 1.96 mV/°C across −40°C to +125°C. When measured with a 16-bit ADC, it enables ±0.5°C board temperature monitoring without external components.
What is the dropout voltage specification for the ADR03BKS-R2?
The ADR03BKS-R2 has a typical dropout voltage of 2 V, meaning VIN must be at least 2 V above VOUT (i.e., ≥4.5 V) to maintain regulation. This is fixed across load and temperature - confirmed in Figure 21 of the Rev. S datasheet - and enables reliable operation even with aging batteries or unregulated supplies.
Is the ADR03BKS-R2 pin-compatible with industry-standard references like REF03?
No - the ADR03BKS-R2 uses a 5-lead SC70 (KS-5) package, whereas REF03 is offered in 8-lead SOIC. However, the 8-lead SOIC version ADR03ARZ *is* pin-compatible with REF03. For drop-in replacement in existing SOIC footprints, ADR03ARZ should be selected instead of ADR03BKS-R2.
ADR03BKS-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- 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:
- SC-70-5
ADR03BKS-R2 FAQ
1.How can I place an order for ADR03BKS-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR03BKS-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 ADR03BKS-R2 reliable?
The price and inventory of ADR03BKS-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR03BKS-R2 is usually 5 days.
3.What payment methods are accepted for ADR03BKS-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR03BKS-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR03BKS-R2?
ADR03BKS-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR03BKS-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 ADR03BKS-R2?
For technical support, including ADR03BKS-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR03BKS-R2 requirements.
6.How does Aetrix verify that ADR03BKS-R2 is sourced from the original manufacturer or authorized distributors?
All ADR03BKS-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 ADR03BKS-R2 meets industry standards.
7.What is the process for return or replacement of ADR03BKS-R2?
All ADR03BKS-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR03BKS-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 ADR03BKS-R2 part is unused and in its original packaging.
Return procedure for ADR03BKS-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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