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Analog Devices Inc. ADR5040BRTZ-R2
- Part No.:
- ADR5040BRTZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADR5040BRTZ-R2.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,749
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Product details
Overview
ADR5040BRTZ-R2 from Analog Devices is a precision 2.048 V shunt voltage reference in a 3-lead SOT-23 (RT-3) package, designed for high-accuracy analog signal chains. It delivers ±0.1% initial accuracy, 75 ppm/°C max temperature coefficient, and operates from 50 µA to 15 mA over −40°C to +125°C - enabling use in battery-powered instrumentation and automotive power monitoring circuits.
For engineers reviewing the ADR5040BRTZ-R2 datasheet, ADR5040BRTZ-R2 pinout, ADR5040BRTZ-R2 application, or ADR5040BRTZ-R2 equivalent, key selection criteria include its ultralow quiescent current, capacitor-free stability, extended temperature qualification, and compatibility with LM4040/LM4050-based designs.
Technical Context
The ADR5040BRTZ-R2 implements a bandgap-based shunt reference architecture that cancels first-order thermal drift by combining forward-biased transistor VBE with a proportional-to-absolute-temperature (PTAT) voltage. Its output remains stable without external compensation capacitors across any capacitive load.
It functions as a two-terminal device requiring only an external bias resistor to regulate current flow between supply and ground. The reference maintains 0.2 Ω dynamic output impedance and exhibits 40 ppm output hysteresis after full-temperature cycling - critical for repeatable calibration in portable test equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±2.048 mV at 100 µA - enables direct interface with 12-bit ADCs using VREF = VFS/2 scaling. |
| Initial Accuracy | ±0.1% - reduces system calibration burden in portable energy meters and sensor transmitters. |
| Temp. Coefficient | ≤75 ppm/°C over −40°C to +125°C - ensures <±0.25 mV drift across automotive under-hood temperature range. |
| Operating Current | 50 µA to 15 mA - supports micropower sleep modes and high-speed data acquisition bursts. |
| Voltage Noise | 2.8 µV rms (0.1–10 Hz), 120 µV rms (10 Hz–10 kHz) - preserves SNR in low-frequency precision measurement front-ends. |
| Turn-On Settling | 28 µs to 0.1% - allows rapid wake-up in duty-cycled IoT sensor nodes. |
| Dynamic Impedance | 0.2 Ω - minimizes load-induced error when driving DAC reference inputs or op-amp feedback networks. |
Pinout & Package
ADR5040BRTZ-R2 uses the 3-lead SOT-23 (RT-3) package per JEDEC TO-236-AB, with 1.30 mm × 2.10 mm footprint and 1.10 mm height. Pin 3 must be connected to V+ per datasheet recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Anode / Input Terminal | Connects to positive supply via bias resistor; carries total current (IIN + IL). |
| 2 (V−) | Cathode / Output Terminal | Provides regulated 2.048 V reference voltage; connects to load and ground return path. |
| 3 (T) | Thermal Pad / V+ Tie | Internally tied to V+; datasheet recommends external connection to V+ for optimal thermal stability and noise immunity. |
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 space-constrained wearables. |
| Pin compatible with LM4040/LM4050 | Direct drop-in replacement in existing designs using industry-standard 3-lead shunt references - no PCB revision needed. |
| Automotive qualified variant available | ADR5040W series meets AEC-Q100 requirements - supports functional safety compliance in vehicle body control modules. |
| Ultralow 50 µA minimum operating current | Enables >10-year battery life in wireless sensor nodes powered by coin cells or energy harvesters. |
| Extended −40°C to +125°C operation | Validated performance across full industrial and automotive ambient ranges - no derating required in engine control units. |
Applications
| Portable Instrumentation | Automotive Power Monitoring |
|---|---|
Use Scenario: Handheld multimeter measuring DC voltage with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 2.048 V reference for ADC full-scale range, directly scaled to 0–2.048 V input. Use Value: ±0.1% initial accuracy and 75 ppm/°C TC ensure <±0.01% reading error across operating temperature without factory recalibration. |
Use Scenario: Battery management system monitoring 12 V lead-acid voltage in start-stop vehicles. IC Role / Device Role / Timing Role: Supplies reference for precision resistor-divider network feeding microcontroller ADC. Use Value: Stable 2.048 V output enables accurate state-of-charge estimation within ±0.5% even during cold cranking (−40°C) and under-hood heat (+125°C). |
| Industrial Data Acquisition | Energy Metering |
Use Scenario: DIN-rail mounted PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Reference for isolated sigma-delta ADC converting conditioned current loop outputs. Use Value: 0.2 Ω dynamic impedance prevents gain error drift when multiplexing multiple channels with shared reference path. |
Use Scenario: Residential smart meter measuring active/reactive power via metrology IC. IC Role / Device Role / Timing Role: Precision reference for metrology ADC sampling voltage and current waveforms simultaneously. Use Value: 2.8 µV rms low-frequency noise ensures <0.1% error in kWh accumulation over 10-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C20IDBZR | 2.048 V, ±0.5% initial accuracy, 100 ppm/°C TC, 60 µA min current | Lower accuracy and higher drift limit use in non-critical biasing; not qualified for automotive | Select when cost sensitivity outweighs precision requirements and temperature range is limited to 0–70°C. |
| ADR5040ARTZ-REEL7 | Same 2.048 V output and RT-3 package, but ±0.2% initial accuracy (Grade A) | Acceptable for mid-tier industrial sensors where ±0.1% is not mandated | Choose for legacy designs already validated with Grade A performance or where tighter TC is prioritized over initial tolerance. |
Compared with LM4040C20IDBZR, ADR5040BRTZ-R2 offers 5× better initial accuracy and 30% lower tempco - critical for Class 0.5 energy meters. Against ADR5040ARTZ-REEL7, it trades 0.1% tighter initial spec for identical package and thermal performance, justifying premium in high-reliability field deployments.
Availability
ADR5040BRTZ-R2 is available at Aetrix Electronics and suitable for portable instrumentation, automotive power monitoring, and industrial data acquisition requiring stable component supply with guaranteed long-term availability.
Supply support for ADR5040BRTZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision measurement, industrial automation, and automotive markets since 1965.
The ADR5040 family targets space-constrained, battery-operated systems demanding ultra-stable voltage references - specifically engineered for portable test gear, automotive ECUs, and smart grid infrastructure where accuracy, temperature resilience, and micropower operation are mandatory.
FAQ
What is the output voltage tolerance of ADR5040BRTZ-R2 at 25°C?
The ADR5040BRTZ-R2 has a nominal output voltage of 2.048 V with ±0.1% initial accuracy at 100 µA, corresponding to ±2.048 mV absolute tolerance. This specification is guaranteed across the full operating current range (50 µA to 15 mA) and remains valid at 25°C per Table 2 in the Rev. E datasheet.
Does ADR5040BRTZ-R2 require an external capacitor for stability?
No, ADR5040BRTZ-R2 does not require an external capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including 0 µF to 10 µF, eliminating the need for external compensation components in battery-powered or space-limited applications.
What is the maximum operating temperature range for ADR5040BRTZ-R2?
The ADR5040BRTZ-R2 is fully specified over −40°C to +125°C, with all electrical characteristics guaranteed across this extended industrial and automotive temperature range. This includes initial accuracy, temperature coefficient, and dynamic impedance performance.
Is ADR5040BRTZ-R2 pin-compatible with LM4040 series references?
Yes, ADR5040BRTZ-R2 is pin-compatible with LM4040 and LM4050 shunt references in the same SOT-23 package. Its pin 1 (V+), pin 2 (V−), and pin 3 (T) match the LM4040 footprint and functional assignment, enabling direct replacement without PCB modification.
What is the minimum operating current for ADR5040BRTZ-R2 at −40°C?
The minimum operating current for ADR5040BRTZ-R2 is 60 µA at −40°C, as specified in the Electrical Characteristics table. At 25°C, the minimum is 50 µA. Designers must size the bias resistor to ensure this current is maintained across the full temperature and supply voltage range.
ADR5040BRTZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- ADR504
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.8µVrms
- Noise - 10Hz to 10kHz:
- 120µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 60 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADR5040BRTZ-R2 FAQ
1.How can I place an order for ADR5040BRTZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR5040BRTZ-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 ADR5040BRTZ-R2 reliable?
The price and inventory of ADR5040BRTZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR5040BRTZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR5040BRTZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR5040BRTZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR5040BRTZ-R2?
ADR5040BRTZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR5040BRTZ-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 ADR5040BRTZ-R2?
For technical support, including ADR5040BRTZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR5040BRTZ-R2 requirements.
6.How does Aetrix verify that ADR5040BRTZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR5040BRTZ-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 ADR5040BRTZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR5040BRTZ-R2?
All ADR5040BRTZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR5040BRTZ-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 ADR5040BRTZ-R2 part is unused and in its original packaging.
Return procedure for ADR5040BRTZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR5040BRTZ-R2 Tags
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