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Analog Devices Inc. ADR5043BKSZ-R2
- Part No.:
- ADR5043BKSZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADR5043BKSZ-R2.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,939
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Product details
Overview
ADR5043BKSZ-R2 from Analog Devices is a precision 3.0 V shunt voltage reference in SC70-3 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. It serves as a compact, low-power voltage reference in high-accuracy ADC biasing, portable power monitoring, and automotive sensor signal conditioning circuits.
For engineers reviewing the ADR5043BKSZ-R2 datasheet, ADR5043BKSZ-R2 pinout, ADR5043BKSZ-R2 application, or ADR5043BKSZ-R2 equivalent, key selection factors include its ultralow operating current, no-external-capacitor stability, SC70 footprint compatibility with LM4040/LM4050, and qualification for extended-temperature automotive use.
Technical Context
The ADR5043BKSZ-R2 implements a bandgap-based shunt architecture that cancels inherent transistor VBE temperature drift via curvature-compensated current ratios, achieving 75 ppm/°C max TCVOUT across −40°C to +125°C. Its dynamic output impedance remains ≤0.2 Ω over 50 µA–15 mA, enabling stable regulation into capacitive loads without external compensation.
It operates as a two-terminal device requiring only an external bias resistor (RBIAS) to set total current (IIN + IL). The reference maintains 3.000 V nominal output at 100 µA with ±3 mV (±0.1%) error, and exhibits 42 µs turn-on settling time with zero load capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000 V nominal at 100 µA; min/max 2.997 V / 3.003 V (Grade B) - ensures tight analog front-end scaling in 12-bit+ data acquisition. |
| Initial Accuracy | ±0.1% (±3 mV) - eliminates need for system-level calibration in portable instrumentation. |
| Temp. Coefficient | 75 ppm/°C max (−40°C to +125°C) - supports stable reference performance in under-hood automotive environments. |
| Operating Current | 50 µA to 15 mA - enables battery-life optimization in always-on sensors and ultra-low-power IoT nodes. |
| Turn-On Settling | 42 µs (CLOAD = 0 µF) - allows fast wake-up response in duty-cycled measurement systems. |
| Voltage Noise | 4.3 µV rms (0.1 Hz–10 Hz); 180 µV rms (10 Hz–10 kHz) - preserves SNR in precision 16-bit ADC references. |
| Dynamic Impedance | ≤0.2 Ω - sustains regulation stability even with PCB trace inductance and local decoupling caps. |
Pinout & Package
ADR5043BKSZ-R2 uses the 3-lead SC70 (KS-3) package: 1.10 mm × 1.00 mm × 0.40 mm body, 0.65 mm pitch, coplanarity ≤0.10 mm. Pin 1 (V+) connects to supply rail, Pin 2 (V−) is cathode/reference node, Pin 3 (T) is thermal pad tied to V+ per datasheet Note 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (V+) | Anode input terminal | Connects to positive supply rail; carries total bias current (IIN + IL) - must be routed with low-impedance path for noise immunity. |
| Pin 2 (V−) | Cathode/reference output | Provides regulated 3.0 V reference voltage; serves as ground reference point for load circuit - requires clean return path. |
| Pin 3 (T) | Thermal pad / V+ tie | Internally connected to V+; recommended to solder to V+ copper pour for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact SC70-3 footprint | 1.10 mm × 1.00 mm area - saves >60% board space vs. SOT-23, critical for wearables and miniaturized ECUs. |
| No external capacitor required | Stable with any capacitive load up to 1 µF - simplifies layout, eliminates capacitor BOM cost and placement risk. |
| Pin-compatible with LM4040/LM4050 | Same 3-pin SC70/SOT-23 pinout and biasing scheme - enables drop-in upgrade to higher accuracy and lower drift. |
| Automotive-qualified variant available | ADR5043BRTZ-REEL7 (W-grade) meets AEC-Q100 - supports direct use in engine control, ADAS, and infotainment modules. |
| Wide operating current range | 50 µA minimum enables <1 µA standby current in sleep-mode systems - extends battery life in remote sensors. |
Applications
| Portable Power Monitoring | Automotive Cabin Sensors |
|---|---|
|
Use Scenario: Real-time battery voltage and charge-state tracking in Bluetooth LE medical patches and smart tags. IC Role / Device Role / Timing Role: Provides stable 3.0 V reference for 12-bit SAR ADC measuring Li-ion cell voltage. Use Value: ±0.1% initial accuracy and 75 ppm/°C drift ensure <0.5% total measurement error across −20°C to +60°C ambient. |
Use Scenario: Cabin temperature and humidity sensing in HVAC control modules. IC Role / Device Role / Timing Role: Supplies precision bias to analog output of digital humidity sensors (e.g., Sensirion SHT3x). Use Value: Low 4.3 µV rms low-frequency noise prevents offset drift in ratiometric sensor interfaces. |
| Industrial Data Acquisition | Energy Management ICs |
|
Use Scenario: Channel calibration reference in 16-bit isolated analog input modules for PLCs. IC Role / Device Role / Timing Role: Sets full-scale reference for sigma-delta ADCs in isolated current/voltage measurement paths. Use Value: 42 µs turn-on settling enables synchronized sampling across 8-channel systems with <100 ns timing skew. |
Use Scenario: Reference voltage for battery fuel gauging ICs (e.g., TI BQ27441) in UPS and solar microinverters. IC Role / Device Role / Timing Role: Defines ADC reference for coulomb counting and state-of-charge estimation algorithms. Use Value: 50 µA–15 mA operating range accommodates both deep-sleep (<10 µA) and active charging (>10 mA) modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C30IDCKR | 3.0 V, ±0.5% initial accuracy, 100 ppm/°C max TCVOUT, 60 µA–15 mA range | Lower accuracy limits resolution in 14-bit+ systems; higher drift affects long-term stability in unregulated enclosures | Select when cost sensitivity outweighs precision requirements and ambient temperature stays within 0°C–70°C. |
| ADR5043ARTZ-REEL7 | Identical electrical specs; SOT-23-3 (RT-3) package instead of SC70-3 (KS-3) | Larger 2.90 mm × 1.30 mm footprint; higher θJA (270°C/W vs. 580.5°C/W) reduces thermal margin in dense layouts | Choose for legacy SOT-23 assembly lines or where thermal dissipation >100 mW is required. |
Compared with LM4040C30IDCKR, ADR5043BKSZ-R2 delivers 5× tighter initial accuracy and 30% lower temperature drift, enabling higher-resolution measurements without calibration. Against ADR5043ARTZ-REEL7, it offers 45% smaller PCB area and superior high-frequency noise rejection due to reduced parasitic inductance in SC70 packaging.
Availability
ADR5043BKSZ-R2 is available at Aetrix Electronics and suitable for portable medical devices, automotive cabin electronics, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADR5043BKSZ-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, with design centers worldwide.
The ADR504x family was engineered specifically for space-constrained, high-accuracy voltage referencing in battery-powered and automotive systems - prioritizing micropower operation, wide temperature stability, and SC70/SOT-23 compatibility.
FAQ
What is the maximum operating current for ADR5043BKSZ-R2?
The absolute maximum reverse current rating for ADR5043BKSZ-R2 is 25 mA per the Absolute Maximum Ratings table. However, the specified operational range is 50 µA to 15 mA - exceeding 15 mA risks violating guaranteed specifications including temperature coefficient and output voltage accuracy. Continuous operation above 15 mA may accelerate long-term drift.
Does ADR5043BKSZ-R2 require an external capacitor for stability?
No, ADR5043BKSZ-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 of the datasheet. Adding a bypass capacitor is optional and used only for supply filtering, not regulation stability.
What is the thermal resistance (θJA) of ADR5043BKSZ-R2 in its SC70-3 package?
The junction-to-ambient thermal resistance (θJA) for ADR5043BKSZ-R2 in the KS-3 (SC70-3) package is 580.5°C/W, as specified in Table 8 of the datasheet. This value assumes worst-case surface-mount conditions on standard FR-4 PCBs with minimal copper pour; actual thermal performance improves significantly with V+ pad soldering to ≥100 mm² copper area.
Can ADR5043BKSZ-R2 be used to generate a negative reference voltage?
Yes, ADR5043BKSZ-R2 can configure a precise negative reference. As shown in Figure 20 of the datasheet, connecting its V+ terminal to ground and V− terminal to a negative supply (e.g., −3.0 V) yields a −3.0 V reference at V− relative to ground. A low-TC resistor must be used for RBIAS to avoid introducing temperature-induced errors in the negative configuration.
Is ADR5043BKSZ-R2 qualified for automotive applications?
The ADR5043BKSZ-R2 itself is not automotive-qualified; it is the commercial-grade variant. For automotive use, Analog Devices specifies the ADR5043BRTZ-REEL7 (W-grade), which undergoes controlled manufacturing and AEC-Q100 stress testing. Designers targeting automotive applications must select the W-grade part and consult the Automotive Products section (page 14) for reliability reports and qualification scope.
ADR5043BKSZ-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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 75ppm/°C
- Noise - 0.1Hz to 10Hz:
- 4.3µVrms
- Noise - 10Hz to 10kHz:
- 180µVrms
- 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
ADR5043BKSZ-R2 FAQ
1.How can I place an order for ADR5043BKSZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR5043BKSZ-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 ADR5043BKSZ-R2 reliable?
The price and inventory of ADR5043BKSZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR5043BKSZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR5043BKSZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR5043BKSZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR5043BKSZ-R2?
ADR5043BKSZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR5043BKSZ-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 ADR5043BKSZ-R2?
For technical support, including ADR5043BKSZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR5043BKSZ-R2 requirements.
6.How does Aetrix verify that ADR5043BKSZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR5043BKSZ-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 ADR5043BKSZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR5043BKSZ-R2?
All ADR5043BKSZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR5043BKSZ-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 ADR5043BKSZ-R2 part is unused and in its original packaging.
Return procedure for ADR5043BKSZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADR5043BKSZ-R2 Tags
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TL431AIDBZR
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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