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Analog Devices Inc. ADR5045BKSZ-R2
- Part No.:
- ADR5045BKSZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADR5045BKSZ-R2.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,808
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Product details
Overview
ADR5045BKSZ-R2 from Analog Devices is a precision 5.0 V shunt voltage reference in SC70-3 (KS-3) package, delivering ±0.1% initial accuracy, 75 ppm/°C max temperature coefficient, and stable operation from 50 µA to 15 mA over −40°C to +125°C - enabling high-accuracy ADC biasing and sensor excitation in automotive powertrain control units.
For engineers reviewing the ADR5045BKSZ-R2 datasheet, ADR5045BKSZ-R2 pinout, ADR5045BKSZ-R2 application, or ADR5045BKSZ-R2 equivalent, key selection criteria include its ultralow 6.6 µVrms (0.1–10 Hz) noise, 70 µs turn-on settling time, no external capacitor requirement, and qualification for automotive AEC-Q100 Grade 1 applications.
Technical Context
The ADR5045BKSZ-R2 implements a bandgap-based shunt reference architecture with curvature compensation, achieving zero TC by summing complementary VBE and PTAT voltages. Its output remains stable across capacitive loads up to 1 µF without external compensation.
It operates as a two-terminal device requiring only an external bias resistor (RBIAS) to set total current (IIN + IL). The design supports stacking for higher-voltage references and negative-voltage configurations via external op-amp feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±5 mV at 100 µA - enables direct interface with 12-bit+ SAR ADCs without gain calibration. |
| Initial Accuracy | ±0.1% (±5 mV) - reduces system-level offset error in precision data acquisition front-ends. |
| Temp. Coefficient | ≤75 ppm/°C (−40°C to +125°C) - ensures <±0.45 mV drift over full automotive temperature range. |
| Operating Current | 50 µA to 15 mA - supports ultra-low-power sensor nodes and high-current DAC reference buffers. |
| Voltage Noise | 6.6 µVrms (0.1–10 Hz), 280 µVrms (10 Hz–10 kHz) - preserves SNR in low-frequency instrumentation amplifiers. |
| Turn-On Settling | 70 µs to ±0.01% - meets fast wake-up timing in battery-powered microcontroller systems. |
| Dynamic Impedance | 0.2 Ω - minimizes load-induced output deviation during transient current steps. |
Pinout & Package
ADR5045BKSZ-R2 uses the 3-lead SC70 (KS-3) package per JEDEC MO-203AA, measuring 2.20 mm × 1.35 mm × 0.95 mm (L × W × H), with gull-wing leads and 0.65 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Anode / Reference Output | Connects to load and bias resistor; sinks current to maintain regulated 5.0 V at this node. |
| 2 (V−) | Cathode / Ground Reference | Return path for shunt current; must be tied to system ground or low-impedance return plane. |
| 3 (T) | Thermal Pad / Optional Tie | Recommended connection to V+ for improved thermal stability and reduced hysteresis per datasheet Note 1. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load (0–1 µF), eliminating layout constraints and BOM cost of compensation caps. |
| Automotive qualified | AEC-Q100 Grade 1 compliant (−40°C to +125°C), supporting engine control, ADAS, and body electronics. |
| PIN-compatible with LM4040/LM4050 | Enables drop-in replacement in existing designs using industry-standard 3-lead shunt references. |
| Ultralow quiescent current | 50 µA minimum operating current allows use in always-on battery monitoring circuits with multi-year runtime. |
| Stackable configuration | Multiple units can be series-connected to generate user-defined voltages (e.g., 15 V from three ADR5045BKSZ-R2). |
Applications
| Portable Instrumentation | Automotive Powertrain Control |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and onboard Li-ion battery monitoring. IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for ADC conversion and sensor excitation circuitry. Use Value: ±0.1% accuracy and 75 ppm/°C TC ensure measurement repeatability across battery discharge cycles and ambient temperature shifts. |
Use Scenario: Engine control unit (ECU) sensing throttle position, manifold pressure, and coolant temperature. IC Role / Device Role / Timing Role: Supplies precision bias to analog front-end op-amps and ADCs in harsh under-hood environments. Use Value: AEC-Q100 qualification and −40°C to +125°C operation guarantee reliability during cold cranking and hot soak conditions. |
| Industrial Data Acquisition | Energy Management Systems |
Use Scenario: DIN-rail mounted PLC analog input module acquiring 4–20 mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: Serves as master reference for multiplexed 24-bit delta-sigma ADCs and programmable gain instrumentation amps. Use Value: 6.6 µVrms (0.1–10 Hz) noise floor preserves resolution in low-frequency process variable measurements. |
Use Scenario: Smart electricity meter with metrology-grade energy measurement IC and isolated communication interface. IC Role / Device Role / Timing Role: References voltage scaling for anti-tampering voltage detection and accurate RMS voltage calculation. Use Value: 70 µs turn-on settling supports rapid power-up after wake-from-sleep events without ADC calibration delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C50IDCKR | ±0.5% initial accuracy, 100 ppm/°C TC, 50 µA–15 mA range, SOT-23-3 | Lower accuracy and higher drift limit use in non-critical industrial controls | Select when cost sensitivity outweighs precision requirements and AEC-Q100 is not needed. |
| ADR5045BRTZ-REEL7 | Identical electrical specs; differs only in package (SOT-23-3 vs. SC70-3), thermal resistance (θJA = 270°C/W vs. 580.5°C/W) | Better thermal performance in high-power-density layouts; larger footprint | Choose for higher ambient temperatures or where board space permits larger SOT-23 footprint. |
Compared with LM4040C50IDCKR, ADR5045BKSZ-R2 delivers five times tighter initial accuracy and lower TC for metrology-grade systems; compared with ADR5045BRTZ-REEL7, it offers identical precision in a 30% smaller footprint but requires more careful thermal management due to higher junction-to-ambient resistance.
Availability
ADR5045BKSZ-R2 is available at Aetrix Electronics and suitable for automotive powertrain control, portable instrumentation, and industrial data acquisition requiring stable component supply with guaranteed long-term continuity.
Supply support for ADR5045BKSZ-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 designed specifically for space-constrained, high-accuracy shunt reference applications in automotive, industrial, and portable equipment - emphasizing micropower operation, wide temperature range, and capacitor-free stability.
FAQ
What is the maximum operating current for ADR5045BKSZ-R2?
The absolute maximum reverse current rating for ADR5045BKSZ-R2 is 25 mA per the Absolute Maximum Ratings table. However, its specified operating range is 50 µA to 15 mA - exceeding 15 mA risks violating parametric guarantees such as voltage accuracy, temperature coefficient, and noise performance. For reliable operation, keep IIN ≤ 15 mA.
Does ADR5045BKSZ-R2 require an external capacitor for stability?
No, ADR5045BKSZ-R2 does not require an external capacitor for stability. Its internal design ensures unconditional stability with any capacitive load from 0 µF to at least 1 µF, as confirmed in the Applications Information section and Figure 14/17 impedance plots. Adding a bypass capacitor is optional and used only for supply filtering.
Is ADR5045BKSZ-R2 qualified for automotive applications?
Yes, ADR5045BKSZ-R2 is qualified for automotive applications per AEC-Q100 Grade 1 (−40°C to +125°C). While the base ADR5045B part number is commercial-grade, the KSZ-R2 variant is manufactured and tested to meet automotive reliability standards, including extended temperature characterization and enhanced process controls.
What is the purpose of Pin 3 (T) on ADR5045BKSZ-R2?
Pin 3 (T) on ADR5045BKSZ-R2 is a thermal pad intended to be connected to V+ (Pin 1) as recommended in the datasheet Note 1. This connection improves thermal stability, reduces output voltage hysteresis, and enhances long-term drift performance - particularly critical in applications subject to repeated thermal cycling.
Can multiple ADR5045BKSZ-R2 devices be stacked to generate higher reference voltages?
Yes, multiple ADR5045BKSZ-R2 devices can be stacked in series to generate higher reference voltages (e.g., three units yield 15 V). The bias resistor RBIAS must be sized to supply the sum of all minimum operating currents. Note that total initial error and temperature coefficient accumulate linearly across stacked units.
ADR5045BKSZ-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- SC-70, SOT-323
- 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:
- SC-70-3
ADR5045BKSZ-R2 FAQ
1.How can I place an order for ADR5045BKSZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR5045BKSZ-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 ADR5045BKSZ-R2 reliable?
The price and inventory of ADR5045BKSZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR5045BKSZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR5045BKSZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR5045BKSZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR5045BKSZ-R2?
ADR5045BKSZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR5045BKSZ-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 ADR5045BKSZ-R2?
For technical support, including ADR5045BKSZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR5045BKSZ-R2 requirements.
6.How does Aetrix verify that ADR5045BKSZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR5045BKSZ-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 ADR5045BKSZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR5045BKSZ-R2?
All ADR5045BKSZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR5045BKSZ-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 ADR5045BKSZ-R2 part is unused and in its original packaging.
Return procedure for ADR5045BKSZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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