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Analog Devices Inc. ADR550ART-R2
- Part No.:
- ADR550ART-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADR550ART-R2.pdf
- Description:
- IC VREF SHUNT PREC 5V SOT-23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,313
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Product details
Overview
ADR550ART-R2 from Analog Devices is a high-precision shunt voltage reference delivering 5.0 V output with ±0.4% initial accuracy, 70 ppm/°C temperature coefficient, and 38 μVp-p (0.1 Hz to 10 Hz) output noise. It operates from 50 μA to 15 mA supply current across −40°C to +85°C and is used in precision data acquisition systems requiring stable low-noise reference voltage.
For engineers reviewing the ADR550ART-R2 datasheet, ADR550ART-R2 pinout, ADR550ART-R2 application, or ADR550ART-R2 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and parametric differences.
Technical Context
The ADR550ART-R2 uses bandgap-based shunt topology with curvature-compensated core to achieve low temperature drift and high initial accuracy without external compensation capacitors. Its trim terminal enables ±0.5% output adjustment while preserving temperature coefficient stability.
Designed for space-constrained industrial systems, it supports stable operation with any capacitive load and maintains regulation down to 50 μA - enabling use in ultra-low-power battery-powered instrumentation where supply current headroom is minimal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V (Grade A: 4.980 V to 5.020 V at 25°C); sets absolute scaling for ADCs, DACs, and analog signal chains. |
| Initial Accuracy | ±0.4% (±20 mV); determines system-level DC error budget before calibration in 12–16-bit measurement systems. |
| Tempco | 70 ppm/°C max (−40°C to +85°C); contributes ≤0.35% full-scale drift over industrial temperature range. |
| Output Noise | 38 μVp-p (0.1 Hz to 10 Hz); limits resolution in high-dynamic-range, low-frequency measurements like energy metering. |
| Operating Current | 50 μA to 15 mA; allows bias resistor design for wide input voltage ranges while maintaining regulation under light loads. |
| Dynamic Impedance | 0.2 Ω (ΔVR/ΔIR); ensures minimal load-induced voltage shift during transient current changes in sensor front-ends. |
| Trim Range | ±0.5% via TRIM pin; enables system-level calibration to cancel gain/offset errors without altering thermal performance. |
Pinout & Package
ADR550ART-R2 is housed in a 3-lead SOT-23-3 (RT-3) package with gull-wing leads, 1.3 mm × 2.2 mm footprint, and 1.1 mm height - suitable for automated assembly and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Anode / Reference Output | Provides regulated 5.0 V output; connects to load and feedback node in shunt configuration. |
| V− | Cathode / Ground Reference | Return path for reference current; must be tied to system ground or negative rail in inverted configurations. |
| TRIM | Adjustment Terminal | Accepts external potentiometer or DAC to fine-tune output voltage ±0.5% without degrading tempco or noise. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load up to 10 μF - eliminates BOM cost and layout area for decoupling caps in portable designs. |
| Ultralow minimum operating current | 50 μA enables use in always-on monitoring circuits powered by coin cells or energy harvesters. |
| Pin compatibility with LM4040/LM4050 | Direct drop-in replacement in existing SOT-23-3 footprints - reduces redesign effort and qualification time. |
| Trimmable output | ±0.5% adjustment range preserves system accuracy after board-level calibration without trimming resistors. |
| Industrial temperature range | −40°C to +85°C operation supports deployment in automotive cabin modules and outdoor industrial sensors. |
Applications
| Portable Data Loggers | Automotive Cabin Sensors |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks on single CR2032 cell. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V reference for 16-bit SAR ADC and low-power microcontroller ADC subsystem. Use Value: 50 μA minimum current draw extends battery life; ±0.4% initial accuracy avoids factory calibration per unit. |
Use Scenario: Occupant detection system using analog-output IR sensors and signal-conditioning ASICs in vehicle dashboards. IC Role / Device Role / Timing Role: Precision voltage reference for sensor excitation and ADC reference in ASIL-B compliant signal chain. Use Value: 70 ppm/°C tempco ensures <0.35% reference drift across −40°C to +85°C cabin temperatures. |
| Programmable Logic Controller (PLC) Input Modules | Smart Energy Meters |
Use Scenario: 4–20 mA loop-powered analog input card converting field signals with 14-bit resolution. IC Role / Device Role / Timing Role: Shunt reference establishing precise 5.0 V reference for op-amp gain stages and ADC reference buffer. Use Value: 0.2 Ω dynamic impedance minimizes reference voltage shift during fast-changing sensor inputs. |
Use Scenario: Revenue-grade electricity meters measuring voltage, current, and power with metrology-grade accuracy. IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for 24-bit delta-sigma ADCs sampling AC waveforms at 4–8 kSPS. Use Value: 38 μVp-p (0.1–10 Hz) noise directly limits effective resolution below 100 nV RMS in anti-aliasing filtered paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR550BRT-R2 | ±0.2% initial accuracy (±10 mV), 40 ppm/°C tempco vs. ADR550ART-R2's ±0.4%/70 ppm/°C | Better DC accuracy and thermal stability; suited for higher-resolution metrology where calibration headroom is limited | Select ADR550BRT-R2 when system-level accuracy demands tighter initial tolerance and lower drift - requires same SOT-23-3 footprint and bias network. |
| LM4040C50IDCKR | ±0.5% initial accuracy, 100 ppm/°C tempco, 20 μVp-p noise, 60 μA min current - less accurate, no trim pin | Lower cost, wider availability; lacks trim capability and has higher thermal drift | Choose LM4040C50IDCKR only if ±0.5% accuracy and 100 ppm/°C drift are acceptable and trim functionality is unnecessary. |
Compared with ADR550ART-R2, ADR550BRT-R2 improves initial accuracy by 2× and cuts tempco by nearly half - making it preferable for calibrated instrumentation; LM4040C50IDCKR trades performance for cost and ubiquity but omits trimming and delivers higher drift, limiting use in thermally varying environments.
Availability
ADR550ART-R2 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC input modules, and automotive cabin sensor systems requiring stable component supply with consistent lead times and RoHS-compliant sourcing.
Supply support for ADR550ART-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 ADR5xx family was designed specifically for space-constrained, high-accuracy voltage reference needs in portable, battery-powered, and industrial measurement systems - emphasizing low quiescent current, ultrasmall packaging, and uncompromised precision.
FAQ
What is the output voltage tolerance of the ADR550ART-R2 over temperature?
The ADR550ART-R2 guarantees ±0.4% initial accuracy at 25°C and exhibits a maximum temperature coefficient of 70 ppm/°C across −40°C to +85°C. This results in a total output variation of ≤±0.63% over the full industrial temperature range, calculated as ±0.4% initial error plus ±0.23% drift (70 ppm/°C × 125°C span). The ADR550ART-R2 datasheet Table 6 confirms these values under specified test conditions.
Can the ADR550ART-R2 be used without an external capacitor?
Yes, the ADR550ART-R2 is internally compensated and remains stable with any capacitive load - including zero capacitance - eliminating the need for external bypass or compensation capacitors. This is explicitly stated in the General Description and Applications sections of the Rev. E datasheet. Unlike many shunt references, the ADR550ART-R2 achieves stability through advanced bandgap circuit design rather than external phase compensation.
What is the function of the TRIM pin on the ADR550ART-R2?
The TRIM pin on the ADR550ART-R2 allows adjustment of the output voltage over a ±0.5% range using an external potentiometer or DAC, without affecting the device's temperature coefficient or noise performance. As shown in Figure 21 of the datasheet, connecting a 10 kΩ potentiometer between V+ and V− with the wiper to TRIM enables precise system-level calibration to compensate for PCB trace resistance, amplifier offset, or sensor nonlinearity.
Is the ADR550ART-R2 pin-compatible with the LM4040 series?
Yes, the ADR550ART-R2 is pin-compatible with the LM4040 and LM4050 in the SOT-23-3 package - sharing identical V+, V−, and cathode/anode pin assignments. This enables direct replacement in existing designs without PCB modification, as confirmed in the FEATURES section of the datasheet. However, note that the ADR550ART-R2 includes a dedicated TRIM pin (Pin 3), whereas LM4040 uses Pin 3 as cathode - requiring verification of schematic connectivity during migration.
What is the minimum operating current required for the ADR550ART-R2 to maintain regulation?
The ADR550ART-R2 requires a minimum operating current of 50 μA to maintain regulation across the full −40°C to +85°C temperature range, as specified in Tables 2–6 and the Absolute Maximum Ratings section. This low threshold enables use in ultra-low-power applications such as wake-on-event sensor nodes and energy-harvesting systems where supply current is severely constrained.
ADR550ART-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- SOT-23-3
ADR550ART-R2 FAQ
1.How can I place an order for ADR550ART-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR550ART-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 ADR550ART-R2 reliable?
The price and inventory of ADR550ART-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR550ART-R2 is usually 5 days.
3.What payment methods are accepted for ADR550ART-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR550ART-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR550ART-R2?
ADR550ART-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR550ART-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 ADR550ART-R2?
For technical support, including ADR550ART-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR550ART-R2 requirements.
6.How does Aetrix verify that ADR550ART-R2 is sourced from the original manufacturer or authorized distributors?
All ADR550ART-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 ADR550ART-R2 meets industry standards.
7.What is the process for return or replacement of ADR550ART-R2?
All ADR550ART-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR550ART-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 ADR550ART-R2 part is unused and in its original packaging.
Return procedure for ADR550ART-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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