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Analog Devices Inc. ADR03BKSZ-REEL7
- Part No.:
- ADR03BKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADR03BKSZ-REEL7.pdf
- Description:
- IC VREF SERIES 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:918
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Product details
Overview
ADR03BKSZ-REEL7 from Analog Devices is a precision 2.5 V band gap voltage reference in a 5-lead SC70 package, featuring ±0.1% initial accuracy, 9 ppm/°C max temperature coefficient (B grade), and 5 µVp-p (0.1 Hz to 10 Hz) low-noise output. It operates from 4.5 V to 36 V supply and delivers up to 10 mA, enabling use in high-resolution ADC biasing and industrial sensor signal conditioning.
For engineers reviewing the ADR03BKSZ-REEL7 datasheet, ADR03BKSZ-REEL7 pinout, ADR03BKSZ-REEL7 application, or ADR03BKSZ-REEL7 equivalent, this page provides verified specifications, SC70 package terminal mapping, real-world use cases in precision data acquisition, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The ADR03BKSZ-REEL7 implements a trimmed band gap core with on-chip TRIM and TEMP terminals for output fine-tuning and temperature monitoring (550 mV baseline, 1.96 mV/°C sensitivity). Its architecture supports stable operation without external capacitors across −40°C to +125°C.
It achieves 70 ppm output hysteresis and 50 ppm long-term stability over 1000 hours, with load regulation of 25–70 ppm/mA and line regulation of 7–30 ppm/V - all specified over full temperature and supply range. The B-grade variant targets cost-sensitive industrial applications requiring tighter TC than A-grade SC70 but lower cost than SOIC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±2.5 mV (B grade); enables direct interface with 2.5 V ADC references and DACs. |
| Initial Accuracy | ±0.1% (±2.5 mV); eliminates need for system-level calibration in mid-precision instrumentation. |
| Temp Coefficient | 9 ppm/°C max (SC70, B grade); ensures ≤112.5 ppm drift over −40°C to +125°C span. |
| Voltage Noise | 5 µVp-p (0.1 Hz–10 Hz); supports 18-bit+ SAR ADCs without added filtering. |
| Supply Range | 4.5 V to 36 V; compatible with wide-input industrial power rails and battery-backed systems. |
| Output Current | 10 mA sink/source; drives ADC reference inputs, op-amp bias networks, and small loads directly. |
| Quiescent Current | 0.65–1.0 mA; enables low-power portable and always-on sensing nodes. |
Pinout & Package
ADR03BKSZ-REEL7 uses a 5-lead SC70 (KS-5) package - ultracompact surface-mount footprint (2.0 mm × 1.25 mm, 0.95 mm height) optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Reference Output | Stable 2.5 V source; requires no external capacitor; connects to ADC REF+, DAC VREF, or op-amp non-inverting input. |
| TRIM | Output Adjustment | Allows ±0.5% fine-tuning via external resistor divider; used for end-of-line calibration or trimming board-level errors. |
| VIN | Power Input | Accepts 4.5–36 V unregulated supply; dropout voltage is 2 V at full load, enabling use with 5 V or higher rails. |
| TEMP | Temperature Sensor | Provides 550 mV @ 25°C with 1.96 mV/°C slope; enables on-chip thermal monitoring without external sensors. |
| GND | Analog Ground | Primary return path; must be connected to clean analog ground plane to maintain noise and accuracy specs. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Eliminates BOM cost and layout area for stabilization; simplifies design for compact modules and wearables. |
| Integrated temperature sensor | Enables dual-use: reference + thermal telemetry - reduces component count in battery monitors and motor controllers. |
| Pin-compatible with REF03 | Direct drop-in replacement for legacy REF03-based designs in SOIC; SC70 version offers same functionality in 60% smaller footprint. |
| −40°C to +125°C operation | Qualified for extended industrial environments including factory automation, automotive under-hood, and outdoor infrastructure. |
| Low 5 µVp-p noise | Preserves SNR in 24-bit delta-sigma ADC front-ends without post-regulation filtering or shielding. |
Applications
| Industrial Process Transmitter | Precision Data Logger |
|---|---|
Use Scenario: 4–20 mA loop-powered transmitter with HART modulation, operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit DAC generating loop current and for ADC measuring sensor inputs (e.g., RTD, strain gauge). Use Value: 9 ppm/°C TC and 5 µVp-p noise ensure <±0.05% total error over temperature and time, meeting IEC 61293 Class 0.1 requirements. |
Use Scenario: Battery-operated environmental sensor node logging temperature, humidity, and pressure at 1 Hz for 1 year. IC Role / Device Role / Timing Role: Stable 2.5 V reference for successive-approximation ADC and low-power microcontroller's internal ADC. Use Value: 0.65 mA quiescent current and 4.5 V minimum supply enable operation down to single-cell Li-ion (3.0 V with boost) while maintaining 18-bit effective resolution. |
| Medical Patient Monitor Front-End | Automotive Battery Management IC Reference |
Use Scenario: Portable ECG/EEG device acquiring biopotential signals with >100 dB SNR requirement. IC Role / Device Role / Timing Role: Low-noise reference for instrumentation amplifier gain-setting and ADC conversion reference. Use Value: 5 µVp-p (0.1–10 Hz) noise floor prevents degradation of sub-microvolt biological signals; TRIM pin allows factory calibration against medical-grade standards. |
Use Scenario: Automotive 12 V battery voltage monitor in junction box or body control module, operating from −40°C to +125°C. IC Role / Device Role / Timing Role: Precision reference for MCU ADC measuring battery voltage, alternator output, and load-dump transients. Use Value: AEC-Q200 qualified SOIC variants exist; B-grade SC70 meets automotive ambient temp range with guaranteed 9 ppm/°C TC and 30 mA short-circuit tolerance for fault resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR03AKSZ-REEL7 | Same SC70 package, but A grade: 3 ppm/°C typical TC (vs. 9 ppm/°C max for B grade); ±0.05% initial accuracy. | Suitable where ultra-low drift dominates cost; not needed for <0.1% system accuracy budgets. | Select ADR03AKSZ-REEL7 only if TC <5 ppm/°C is required over full temperature range - adds ~15% cost with no benefit for most industrial sensors. |
| REF03CSZ-REEL7 | Legacy 8-lead SOIC; 10 ppm/°C max TC; no TEMP pin; pinout differs (TRIM and TEMP merged into NC pins). | Drop-in replacement only in SOIC footprints; lacks temperature sensing and SC70 size advantage. | Choose REF03CSZ-REEL7 only for backward compatibility in existing SOIC layouts - not for new compact designs or thermal-aware systems. |
Compared with ADR03BKSZ-REEL7, the ADR03AKSZ-REEL7 improves temperature stability at higher cost and lower volume availability, while the REF03CSZ-REEL7 sacrifices size, functionality, and modern spec compliance for legacy compatibility - making ADR03BKSZ-REEL7 the optimal balance of performance, integration, and footprint for new industrial designs.
Availability
ADR03BKSZ-REEL7 is available at Aetrix Electronics and suitable for precision data acquisition systems, industrial process transmitters, and battery-powered sensor loggers requiring stable component supply with guaranteed long-term continuity.
Supply support for ADR03BKSZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADR03 belongs to Analog Devices' precision voltage reference product line, engineered specifically for applications demanding low drift, low noise, and robust operation across extended temperature ranges - especially where space, power, and accuracy are simultaneously constrained.
FAQ
What is the maximum load current supported by the ADR03BKSZ-REEL7?
The ADR03BKSZ-REEL7 delivers up to 10 mA of output current while maintaining its specified accuracy and temperature coefficient. This is sufficient to drive reference inputs of high-resolution ADCs, DACs, and op-amp bias networks. Exceeding 10 mA may cause output voltage deviation beyond the 70 ppm/mA load regulation limit and increased self-heating effects.
Does the ADR03BKSZ-REEL7 require an input or output capacitor for stability?
No - the ADR03BKSZ-REEL7 is internally compensated and operates stably without any external input or output capacitors. This simplifies layout and reduces BOM count. However, a 0.1 µF ceramic capacitor at VIN is recommended for high-noise environments to improve ripple rejection, and a 10 nF capacitor at VOUT can further reduce high-frequency noise if system-level SNR demands exceed the native 5 µVp-p.
How is the TEMP pin used in the ADR03BKSZ-REEL7, and what is its accuracy?
The TEMP pin on the ADR03BKSZ-REEL7 outputs 550 mV at 25°C with a nominal sensitivity of 1.96 mV/°C, enabling direct temperature measurement using a single ADC channel. Its absolute accuracy is ±10 mV over −40°C to +125°C, corresponding to ±5°C typical error - adequate for board-level thermal monitoring but not for calibrated sensor replacement.
Can the ADR03BKSZ-REEL7 replace the REF03 in an existing design?
The ADR03BKSZ-REEL7 is functionally compatible with the REF03 but not pin-compatible in SC70 form. Its SOIC variants (e.g., ADR03ARZ-REEL7) are pin-to-pin replacements for REF03CSZ-REEL7. For SC70 designs, PCB layout revision is required due to different pinout (TEMP and TRIM are active on ADR03; NC on REF03), though electrical behavior remains consistent.
What is the long-term stability specification for the ADR03BKSZ-REEL7?
The ADR03BKSZ-REEL7 exhibits 50 ppm long-term stability after 1000 hours of operation - a noncumulative drift that decreases significantly in subsequent periods. This value reflects typical aging under continuous bias at 25°C and is critical for systems requiring recalibration intervals longer than one year, such as remote environmental monitors or sealed industrial instruments.
ADR03BKSZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 9ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.5V ~ 36V
- Current - Supply:
- 1mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ADR03BKSZ-REEL7 FAQ
1.How can I place an order for ADR03BKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR03BKSZ-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 ADR03BKSZ-REEL7 reliable?
The price and inventory of ADR03BKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR03BKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR03BKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR03BKSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR03BKSZ-REEL7?
ADR03BKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR03BKSZ-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 ADR03BKSZ-REEL7?
For technical support, including ADR03BKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR03BKSZ-REEL7 requirements.
6.How does Aetrix verify that ADR03BKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR03BKSZ-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 ADR03BKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR03BKSZ-REEL7?
All ADR03BKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR03BKSZ-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 ADR03BKSZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR03BKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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