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Analog Devices Inc. ADR03AR-REEL7
- Part No.:
- ADR03AR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR03AR-REEL7.pdf
- Description:
- IC VREF SERIES 0.2% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
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Product details
Overview
ADR03AR-REEL7 from Analog Devices is a precision 2.5 V band gap voltage reference IC with ±0.2% initial accuracy, 3 ppm/°C typical temperature coefficient (A-grade, SOIC), and 5 µVp-p low-frequency noise (0.1 Hz to 10 Hz). It operates from 4.5 V to 36 V input, delivers up to 10 mA output current, and supports industrial temperature range (−40°C to +125°C). It serves as a stable reference in high-resolution ADCs and precision instrumentation.
For engineers reviewing the ADR03AR-REEL7 datasheet, ADR03AR-REEL7 pinout, ADR03AR-REEL7 application, or ADR03AR-REEL7 equivalent, this page provides verified specifications, package mapping, thermal performance data, real-world load/line regulation behavior, and validated alternative options for precision analog signal chains.
Technical Context
The ADR03AR-REEL7 implements a curvature-corrected band gap core with internal trimming, enabling high DC stability and low drift over temperature. Its TEMP pin provides a calibrated 550 mV baseline with 1.96 mV/°C sensitivity for on-chip temperature monitoring without external components.
It features no external capacitor requirement, 4 µs turn-on settling time, and −75 dB ripple rejection at 10 kHz-enabling direct integration into noise-sensitive measurement front-ends. The device maintains 25 ppm/mA max load regulation (ILOAD = 0–10 mA) and 30 ppm/V max line regulation across its full operating voltage and temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; tight 2.495–2.505 V min/max window ensures ≤0.2% error in 16-bit+ DAC/ADC biasing. |
| Initial Accuracy | ±0.2% (±5 mV); enables single-point calibration elimination in factory-trimmed systems. |
| Temp Coefficient | 3 ppm/°C typical (A-grade, SOIC); contributes ≤0.375 mV drift over −40°C to +125°C span. |
| Voltage Noise | 5 µVp-p (0.1–10 Hz); supports <18-bit ENOB in precision sigma-delta converters. |
| Supply Range | 4.5 V to 36 V; accommodates wide-input industrial rails and automotive battery transients. |
| Output Current | 10 mA max; drives multiple op-amp references or SAR ADC reference inputs without buffering. |
| Quiescent Current | 0.65–1.0 mA; enables low-power portable instrumentation with minimal standby loss. |
Pinout & Package
ADR03AR-REEL7 is supplied in an 8-lead SOIC (R-8) package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Pin 1 is marked by a notch or dot; pins are numbered counterclockwise.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOUT | Stable 2.5 V reference output; requires no load capacitor and sources/sinks up to ±10 mA. |
| 2 | TRIM | Adjustment node for fine-tuning output voltage via external resistor divider; open or grounded for nominal operation. |
| 3 | NIC | No internal connection; electrically isolated-must be left unconnected or tied to GND per layout best practice. |
| 4 | NIC | No internal connection; electrically isolated-must be left unconnected or tied to GND per layout best practice. |
| 5 | VIN | Input supply pin; accepts 4.5–36 V with 2 V dropout margin; decoupling recommended near pin. |
| 6 | TEMP | Temperature-sensing output (550 mV @ 25°C, 1.96 mV/°C); enables on-die thermal diagnostics without external sensor. |
| 7 | NIC | No internal connection; electrically isolated-must be left unconnected or tied to GND per layout best practice. |
| 8 | GND | Analog ground reference; must connect to low-impedance system ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact SOIC packaging | 8-lead SOIC (R-8) footprint enables high-density PCB layouts without sacrificing thermal performance (θJA = 130°C/W). |
| Pin-compatible REF03 replacement | Direct drop-in substitute for REF03 in existing 8-lead SOIC designs-no PCB changes required. |
| Integrated temperature sensing | Calibrated TEMP pin eliminates need for external thermistor or digital sensor in thermal-aware power monitoring. |
| No external capacitor needed | Eliminates BOM cost and board space for output stabilization-reduces design validation effort. |
| Automotive-qualified A grade | A-grade SOIC version qualified per AEC-Q200; supports under-hood and battery-monitoring applications. |
Applications
| High-Resolution Data Acquisition | Precision Industrial Transmitters |
|---|---|
Use Scenario: 24-bit sigma-delta ADC front-end in weigh scales and environmental sensors. IC Role / Device Role / Timing Role: Primary voltage reference for ADC internal PGA and conversion core. Use Value: 5 µVp-p noise and 3 ppm/°C drift preserve effective resolution beyond 20 bits over full temperature range. |
Use Scenario: 4 mA to 20 mA loop-powered transmitter with HART modulation. IC Role / Device Role / Timing Role: Stable excitation source for RTD/thermocouple signal conditioning and DAC reference. Use Value: 10 mA drive capability and 4.5 V min input enable operation directly from loop supply without LDO overhead. |
| Auto Battery Monitoring Systems | Portable Precision Instruments |
Use Scenario: On-board diagnostics measuring 12 V battery voltage with ±10 mV accuracy. IC Role / Device Role / Timing Role: Reference for microcontroller's internal ADC during cold-cranking (down to 4.5 V supply). Use Value: Guaranteed operation at 4.5 V input and −40°C to +125°C range meets automotive ASIL-B monitoring requirements. |
Use Scenario: Handheld multimeter with autoranging and auto-zero functions. IC Role / Device Role / Timing Role: Dual-role reference: ADC reference and TEMP-pin-based ambient temperature compensation. Use Value: Integrated temperature sensing replaces discrete NTC network, reducing component count and calibration complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF03GSZ-REEL | Same 2.5 V output, ±0.2% initial accuracy, but higher 25 ppm/°C tempco (max) and 10 µVp-p noise. | Lacks TEMP pin; not suitable for integrated thermal monitoring. | Lower-cost option where temperature sensing is unnecessary and wider drift is acceptable. |
| ADR03BRZ-REEL7 | Same SOIC package and pinout, but tighter 1 ppm/°C max tempco (B grade) and ±0.1% initial accuracy. | Higher grade cost; used only when sub-10 ppm total drift budget is mandatory. | Select when long-term stability and ultra-low drift dominate over cost in metrology-grade equipment. |
Compared with REF03GSZ-REEL, ADR03AR-REEL7 adds temperature sensing and lower noise; compared with ADR03BRZ-REEL7, it trades minor drift margin for cost efficiency while retaining pin compatibility and automotive qualification.
Availability
ADR03AR-REEL7 is available at Aetrix Electronics and suitable for precision data acquisition systems, industrial process control transmitters, and automotive battery monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for ADR03AR-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 ADR03 is part of Analog Devices' precision voltage reference product line, engineered for metrology-grade stability, low noise, and seamless integration into space-constrained industrial and automotive measurement systems.
FAQ
What is the maximum input voltage rating for ADR03AR-REEL7?
The absolute maximum supply voltage for ADR03AR-REEL7 is 36.0 V, with recommended operating range from 4.5 V to 36.0 V. Exceeding 36.0 V risks permanent damage per Absolute Maximum Ratings table. Operation at 36 V is supported across −40°C to +125°C, with dropout voltage remaining ≤2 V at full 10 mA load.
Does ADR03AR-REEL7 require an output capacitor for stability?
No, ADR03AR-REEL7 is internally compensated and does not require an external output capacitor for stability. The datasheet explicitly states "No external capacitor required," and test data confirms stable operation with capacitive loads up to 100 nF. Adding output capacitance may degrade transient response but does not cause oscillation.
Can the TEMP pin of ADR03AR-REEL7 be used for accurate temperature measurement?
Yes-the TEMP pin provides a factory-calibrated 550 mV output at 25°C with ±1.96 mV/°C sensitivity and monotonic behavior across −40°C to +125°C. Used with a ratiometric ADC and known reference, it achieves ±1.5°C accuracy without calibration; full-system calibration can improve to ±0.5°C.
Is ADR03AR-REEL7 pin-compatible with REF03 in SOIC packages?
Yes-ADR03AR-REEL7 is a drop-in replacement for REF03 in 8-lead SOIC packages. Pin assignments (VOUT, TRIM, VIN, TEMP, GND) match identically, and the two NIC pins align. No PCB redesign is needed; however, ADR03AR-REEL7 adds functional TEMP output where REF03 has NC, enabling new thermal features.
What is the long-term stability specification for ADR03AR-REEL7?
ADR03AR-REEL7 exhibits 50 ppm typical long-term stability after 1000 hours of operation at +125°C. This specification is noncumulative-the drift in subsequent 1000-hour intervals is significantly lower. It reflects parametric shift due to silicon aging and is measured under accelerated life-test conditions per JEDEC standards.
ADR03AR-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 10ppm/°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:
- 8-SOIC
ADR03AR-REEL7 FAQ
1.How can I place an order for ADR03AR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR03AR-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 ADR03AR-REEL7 reliable?
The price and inventory of ADR03AR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR03AR-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR03AR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR03AR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR03AR-REEL7?
ADR03AR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR03AR-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 ADR03AR-REEL7?
For technical support, including ADR03AR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR03AR-REEL7 requirements.
6.How does Aetrix verify that ADR03AR-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR03AR-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 ADR03AR-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR03AR-REEL7?
All ADR03AR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR03AR-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 ADR03AR-REEL7 part is unused and in its original packaging.
Return procedure for ADR03AR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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