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Analog Devices Inc. ADR5040AKSZ-R2
- Part No.:
- ADR5040AKSZ-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADR5040AKSZ-R2.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
ADR5040AKSZ-R2 from Analog Devices is a precision 2.048 V shunt voltage reference in SC70-3 (KS-3) package, delivering ±0.2% initial accuracy, 100 ppm/°C max temperature coefficient, and stable operation from 50 µA to 15 mA over −40°C to +125°C - used for high-resolution ADC/DAC biasing and portable energy metering.
For engineers reviewing the ADR5040AKSZ-R2 datasheet, ADR5040AKSZ-R2 pinout, ADR5040AKSZ-R2 application, or ADR5040AKSZ-R2 equivalent, key selection criteria include output voltage tolerance at temperature extremes, minimum operating current under low-power sleep modes, dynamic impedance stability with capacitive loads, and compatibility with LM4040-based PCB layouts.
Technical Context
The ADR5040AKSZ-R2 implements a bandgap-derived shunt reference architecture with curvature-compensated core, enabling zero-TC operation near 2.048 V without external compensation. It operates as a two-terminal device requiring only an external bias resistor to regulate current flow through its V+ and V− terminals.
Its design eliminates need for output capacitance while maintaining stability across 0–1 µF load range and supports stacking for higher-voltage references. Thermal hysteresis is specified at 40 ppm, and voltage noise is 2.8 µV rms (0.1–10 Hz), confirming suitability for 16-bit+ data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal; ±0.2% initial error (±4.096 mV) ensures ≤1 LSB error in 12-bit 2.048 V full-scale systems. |
| Tempco | ≤100 ppm/°C over −40°C to +125°C; adds ≤0.205 V drift across full range - critical for automotive sensor signal conditioning. |
| Operating Current | 50 µA to 15 mA; enables ultra-low-power wake-up reference use and high-current transient immunity in power supply monitors. |
| Voltage Noise | 2.8 µV rms (0.1–10 Hz); supports <16-bit ENOB in precision instrumentation front-ends without additional filtering. |
| Settling Time | 28 µs to 0.1% with no load; allows fast reference enable/disable in time-multiplexed ADC architectures. |
| Dynamic Impedance | 0.2 Ω; maintains <1 mV output shift under 1 mA load transients - essential for stable SAR ADC reference buffers. |
| Hysteresis | 40 ppm; limits repeatability error after thermal cycling in industrial control loop calibration. |
Pinout & Package
ADR5040AKSZ-R2 uses the 3-lead SC70 (KS-3) package: 1.35 mm × 0.89 mm × 0.40 mm body, 0.65 mm pitch, JEDEC-compliant thin shrink outline. Pin 1 = V+, Pin 2 = V−, Pin 3 = T (thermal pad tied to V+ per datasheet Note 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Anode / Input terminal | Connects to bias resistor; sinks current into reference core; must be ≥2.048 V for regulation. |
| V− | Cathode / Output terminal | Provides stable 2.048 V reference node; connects to load and feedback networks. |
| T | Thermal pad / V+ tie | Internally connected to V+; externally tied to V+ to improve thermal stability and power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact SC70 packaging | Enables placement in space-constrained modules like smart sensor nodes and wearables (<1.2 mm² footprint). |
| No external capacitor required | Eliminates BOM cost and layout risk while ensuring stability with any capacitive load up to 1 µF. |
| PIN-compatible with LM4040/LM4050 | Allows drop-in replacement in legacy designs without PCB revision - same pinout and biasing scheme. |
| Extended temperature range | Rated −40°C to +125°C; qualified for under-hood automotive and industrial motor drive applications. |
| Low 50 µA minimum current | Supports battery life extension in always-on monitoring circuits (e.g., gas meters, IoT edge sensors). |
Applications
| Portable Instrumentation | Automotive Sensor Biasing |
|---|---|
Use Scenario: Handheld multimeter using 24-bit sigma-delta ADC with internal PGA. IC Role / Device Role / Timing Role: Provides precise 2.048 V reference for ADC full-scale calibration and offset nulling. Use Value: ±0.2% initial accuracy and 100 ppm/°C tempco ensure <0.01% measurement error across operating temperature range. |
Use Scenario: Exhaust gas oxygen (EGO) sensor interface in engine control unit (ECU). IC Role / Device Role / Timing Role: Supplies stable bias voltage to op-amp circuitry conditioning Nernst cell output. Use Value: −40°C to +125°C rating and 40 ppm hysteresis guarantee repeatable sensor linearity during thermal cycling. |
| Energy Metering | Programmable Logic Controller (PLC) Analog Input |
Use Scenario: Residential smart electricity meter with metrology IC (e.g., ADE7953). IC Role / Device Role / Timing Role: References metrology ADC for active/reactive energy calculation. Use Value: 2.8 µV rms low-frequency noise prevents quantization error in 0.1% accuracy billing measurements. |
Use Scenario: 16-channel industrial PLC analog input module with multiplexed ADC. IC Role / Device Role / Timing Role: Shared reference source for all channels to minimize inter-channel gain mismatch. Use Value: 0.2 Ω dynamic impedance ensures <0.5 mV crosstalk-induced error during channel switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C20IDCKR | 2.048 V, ±0.5% initial accuracy, 100 ppm/°C, SOT-23-3; higher min current (60 µA), no SC70 option. | Lower accuracy limits use in >12-bit systems; lacks automotive qualification. | Select when cost sensitivity outweighs precision needs and board space permits SOT-23. |
| ADR5040BKSZ-R2 | Same package and voltage; ±0.1% initial accuracy, 75 ppm/°C max tempco; tighter specs at higher cost. | Enables 14-bit system accuracy; preferred for calibrated test equipment and medical sensors. | Choose for upgraded precision without layout change - identical pinout and footprint. |
Compared with LM4040C20IDCKR, ADR5040AKSZ-R2 offers superior initial accuracy and guaranteed automotive qualification; compared with ADR5040BKSZ-R2, it trades 0.1% accuracy for lower unit cost while retaining identical thermal and noise performance.
Availability
ADR5040AKSZ-R2 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, and energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADR5040AKSZ-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 ADR5040 series belongs to Analog Devices' precision voltage reference product line, engineered for high-accuracy, low-drift, micropower operation in space- and power-constrained systems including portable, automotive, and industrial measurement platforms.
FAQ
What is the maximum operating current for ADR5040AKSZ-R2?
The ADR5040AKSZ-R2 supports a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. This limit ensures safe junction temperature operation under worst-case ambient conditions and allows robust transient response in power supply monitor applications. Exceeding 15 mA risks permanent damage and voids reliability guarantees.
Is ADR5040AKSZ-R2 qualified for automotive use?
No, ADR5040AKSZ-R2 is not automotive-qualified. Only variants with "W" suffix (e.g., ADR5040WARTZ-R7) are AEC-Q100 qualified. The ADR5040AKSZ-R2 is rated for −40°C to +125°C operation but lacks the controlled manufacturing, extended reliability testing, and failure reporting required for automotive applications.
Can ADR5040AKSZ-R2 replace LM4040 in existing designs?
Yes, ADR5040AKSZ-R2 is explicitly pin-compatible with LM4040 and LM4050 devices. Its identical 3-pin SC70/SOT-23 footprint, same biasing topology, and compatible voltage range (2.048 V) allow direct substitution without PCB changes - provided the design accommodates its tighter initial accuracy and lower minimum current (50 µA vs. LM4040's 60 µA).
Does ADR5040AKSZ-R2 require an external capacitor for stability?
No, ADR5040AKSZ-R2 does not require an external capacitor for stability. Its internal design ensures unconditional stability with any capacitive load from 0 to 1 µF, eliminating the need for output bypassing and simplifying layout in noise-sensitive applications such as precision data acquisition systems.
What is the voltage noise specification of ADR5040AKSZ-R2?
The ADR5040AKSZ-R2 exhibits 2.8 µV rms voltage noise over the 0.1 Hz to 10 Hz band and 120 µV rms from 10 Hz to 10 kHz. These values are measured at 100 µA operating current and directly impact effective resolution in high-precision ADC applications - for example, limiting achievable ENOB in 16-bit systems without additional filtering.
ADR5040AKSZ-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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°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:
- SC-70-3
ADR5040AKSZ-R2 FAQ
1.How can I place an order for ADR5040AKSZ-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR5040AKSZ-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 ADR5040AKSZ-R2 reliable?
The price and inventory of ADR5040AKSZ-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR5040AKSZ-R2 is usually 5 days.
3.What payment methods are accepted for ADR5040AKSZ-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR5040AKSZ-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR5040AKSZ-R2?
ADR5040AKSZ-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR5040AKSZ-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 ADR5040AKSZ-R2?
For technical support, including ADR5040AKSZ-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR5040AKSZ-R2 requirements.
6.How does Aetrix verify that ADR5040AKSZ-R2 is sourced from the original manufacturer or authorized distributors?
All ADR5040AKSZ-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 ADR5040AKSZ-R2 meets industry standards.
7.What is the process for return or replacement of ADR5040AKSZ-R2?
All ADR5040AKSZ-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR5040AKSZ-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 ADR5040AKSZ-R2 part is unused and in its original packaging.
Return procedure for ADR5040AKSZ-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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