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Analog Devices Inc. ADR5045BRTZ-R2
- Part No.:
- ADR5045BRTZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADR5045BRTZ-R2.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,699
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Product details
Overview
ADR5045BRTZ-R2 from Analog Devices is a precision 5.0 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, 6.6 µVrms low-frequency noise (0.1–10 Hz), operates from 50 µA to 15 mA, and is qualified for automotive applications across −40°C to +125°C.
For engineers reviewing the ADR5045BRTZ-R2 datasheet, ADR5045BRTZ-R2 pinout, ADR5045BRTZ-R2 application, or ADR5045BRTZ-R2 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented differences.
Technical Context
The ADR5045BRTZ-R2 implements a bandgap-based shunt reference architecture optimized for stability without external compensation capacitors. Its output remains stable under any capacitive load and exhibits low dynamic impedance (0.2 Ω) across its full 50 µA–15 mA operating current range.
It features fast turn-on settling (70 µs at CLOAD = 0 µF), 40 ppm output voltage hysteresis, and guaranteed performance over the extended industrial–automotive temperature range (−40°C to +125°C), making it suitable for battery-powered instrumentation and safety-critical power monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V nominal (4.995–5.005 V, Grade B @ 100 µA); enables precise 5 V system calibration and ADC/DAC reference rails. |
| Initial Accuracy | ±0.1% (±5 mV); reduces system-level calibration burden in portable medical sensors and automotive sensor interfaces. |
| Temp Coefficient | 75 ppm/°C max (−40°C to +125°C); ensures < ±0.4 mV drift over full automotive temperature range. |
| Operating Current | 50 µA to 15 mA; supports ultra-low-power wake-up circuits and high-current precision regulators without redesign. |
| Voltage Noise | 6.6 µVrms (0.1–10 Hz); critical for high-resolution data acquisition where low-frequency noise dominates error budget. |
| Settling Time | 70 µs (CLOAD = 0 µF); allows rapid power-up in battery management systems requiring fast reference stabilization. |
| Dynamic Impedance | 0.2 Ω; maintains output regulation despite fast load transients in switched-mode power supply feedback loops. |
Pinout & Package
ADR5045BRTZ-R2 is housed in a 3-lead SOT-23 (RT-3) package per JEDEC TO-236-AB, with 1.30 mm × 2.10 mm footprint and 0.95 mm height. Pin 1 (V+) connects to the anode, Pin 2 (V−) to cathode, and Pin 3 (T) is the temperature-sensing terminal-recommended to be tied to V+ for optimal thermal stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (V+) | Anode input | Connects to bias resistor; carries total shunt current (IIN = ILOAD + IREF) into device. |
| Pin 2 (V−) | Cathode output / reference ground | Serves as stable 5.0 V reference node; must be low-impedance return path for load and sensing circuits. |
| Pin 3 (T) | Temperature compensation terminal | Internally connected to thermal sensor; tying to V+ minimizes thermal hysteresis and improves long-term stability. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load up to 1 µF-eliminates board space and BOM cost for bypass caps in space-constrained modules. |
| Precision automotive qualification | AEC-Q100 stress-tested and controlled manufacturing flow-enables use in ASIL-B–compatible power monitors and engine control references. |
| Wide operating current range | 50 µA minimum ensures functionality in energy-harvesting nodes; 15 mA maximum supports high-speed DAC buffer drive capability. |
| Ultralow 0.1 Hz–10 Hz noise | 6.6 µVrms enables sub-16-bit effective resolution in slow-sampling sensor front-ends without additional filtering. |
| Pin compatibility with LM4040/LM4050 | Direct drop-in replacement in legacy designs using 3-pin shunt references-no PCB or schematic revision needed. |
Applications
| Battery-Powered Instrumentation | Automotive Sensor Interface |
|---|---|
Use Scenario: Portable handheld multimeter with 20-bit SAR ADC and lithium coin-cell supply. IC Role / Device Role / Timing Role: Primary 5.0 V reference for ADC and internal DAC calibration. Use Value: ±0.1% initial accuracy and 75 ppm/°C TC ensure measurement repeatability across field temperature variations without recalibration. |
Use Scenario: Engine coolant temperature sensor signal conditioning module in Tier-1 ECU. IC Role / Device Role / Timing Role: Stable 5.0 V reference for ratiometric RTD bridge excitation and ADC conversion. Use Value: Automotive qualification and −40°C to +125°C operation guarantee reliability under hood thermal cycling and vibration. |
| Industrial Power Monitoring | Programmable Current Source |
Use Scenario: DIN-rail mounted energy meter with isolated DC-DC converter feedback loop. IC Role / Device Role / Timing Role: Precision shunt reference for optocoupler-based voltage feedback network. Use Value: 0.2 Ω dynamic impedance and 70 µs settling time maintain tight output regulation during line transients and load steps. |
Use Scenario: Lab-grade programmable load for battery testing with digital potentiometer control. IC Role / Device Role / Timing Role: Fixed 5.0 V reference for op-amp-based current mirror setpoint. Use Value: Low 6.6 µVrms noise and ±0.1% accuracy enable < 0.05% current setting error across 10 µA–1 A range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR5045ARTZ-REEL7 | Same 5.0 V output and RT-3 package, but ±0.2% initial accuracy (vs. ±0.1%) and 100 ppm/°C max TC. | Acceptable for non-critical industrial controls where tighter accuracy is not required; lower cost. | Select when ±0.2% tolerance and higher TC are acceptable to reduce BOM cost in volume production. |
| LM4040CIM3-5.0/NOPB | 5.0 V shunt reference in SOT-23; ±0.5% initial accuracy, 100 ppm/°C TC, 75 µVrms (0.1–10 Hz) noise. | Not automotive-qualified; lacks temperature terminal (Pin 3); higher noise limits resolution in precision metrology. | Use only in commercial-grade, cost-sensitive applications where AEC-Q100 compliance and low-noise performance are unnecessary. |
Compared with ADR5045ARTZ-REEL7, the ADR5045BRTZ-R2 offers tighter accuracy and lower TC for demanding calibration tasks; compared with LM4040CIM3-5.0/NOPB, it provides superior noise, automotive qualification, and thermal stability-justifying its use in safety-relevant and high-resolution systems.
Availability
ADR5045BRTZ-R2 is available at Aetrix Electronics and suitable for battery-powered instrumentation, automotive sensor interfaces, and industrial power monitoring requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for ADR5045BRTZ-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 ADR504x family was engineered specifically for space-constrained, high-accuracy shunt reference applications-including portable test equipment, automotive subsystems, and precision data acquisition-where low drift, low noise, and robust temperature performance are mandatory.
FAQ
What is the output voltage tolerance of the ADR5045BRTZ-R2 over temperature?
The ADR5045BRTZ-R2 guarantees ±0.1% initial accuracy at 25°C and a maximum temperature coefficient of 75 ppm/°C over −40°C to +125°C. This results in a worst-case total output deviation of approximately ±0.375% (±18.75 mV) across the full temperature range, calculated as ±0.1% + (165°C × 75 ppm/°C)/10,000. The ADR5045BRTZ-R2 datasheet Table 6 confirms this behavior under specified test conditions.
Can the ADR5045BRTZ-R2 operate without an external bias resistor?
No-the ADR5045BRTZ-R2 is a shunt reference and requires an external bias resistor (RBIAS) between the supply and the V+ pin to establish its operating current. As shown in Figure 19 of the ADR5045BRTZ-R2 datasheet, RBIAS sets the sum of load current (IL) and reference current (IIN). Without it, no current flows through the ADR5045BRTZ-R2, and no stable reference voltage develops at V−.
Is Pin 3 (T) mandatory to connect on the ADR5045BRTZ-R2?
While the ADR5045BRTZ-R2 functions with Pin 3 floating, Analog Devices recommends connecting Pin 3 (T) directly to V+ (Pin 1) to minimize thermal hysteresis and optimize long-term stability. Notes in the ADR5045BRTZ-R2 datasheet (Figure 1, Note 1) and Applications Information section explicitly state this connection improves performance-especially in thermally cycled environments like automotive under-hood applications.
Does the ADR5045BRTZ-R2 support stacking for higher output voltages?
Yes-the ADR5045BRTZ-R2 can be stacked in series with identical or different ADR504x devices (e.g., ADR5041, ADR5044) to generate user-defined reference voltages such as ±7.5 V or +15 V. As detailed in Figure 21 of the ADR5045BRTZ-R2 datasheet, the same bias current flows through all stacked units, and total error accumulates linearly (e.g., ±0.1% × N for N stacked ADR5045BRTZ-R2 units).
What is the minimum operating current for the ADR5045BRTZ-R2 at −40°C?
The ADR5045BRTZ-R2 requires a minimum operating current of 60 µA over the full −40°C to +125°C temperature range, as specified in Table 6 of its datasheet under "MINIMUM OPERATING CURRENT". At 25°C, the minimum is 50 µA-but designers must use 60 µA for worst-case cold-start analysis in battery-powered or automotive systems.
ADR5045BRTZ-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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6.6µVrms
- Noise - 10Hz to 10kHz:
- 280µVrms
- 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
ADR5045BRTZ-R2 FAQ
1.How can I place an order for ADR5045BRTZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR5045BRTZ-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 ADR5045BRTZ-R2 reliable?
The price and inventory of ADR5045BRTZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR5045BRTZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR5045BRTZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR5045BRTZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR5045BRTZ-R2?
ADR5045BRTZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR5045BRTZ-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 ADR5045BRTZ-R2?
For technical support, including ADR5045BRTZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR5045BRTZ-R2 requirements.
6.How does Aetrix verify that ADR5045BRTZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR5045BRTZ-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 ADR5045BRTZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR5045BRTZ-R2?
All ADR5045BRTZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR5045BRTZ-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 ADR5045BRTZ-R2 part is unused and in its original packaging.
Return procedure for ADR5045BRTZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR5045BRTZ-R2 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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