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Analog Devices Inc. ADR03AKS-R2
- Part No.:
- ADR03AKS-R2
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
ADR03AKS-R2.pdf
- Description:
- IC VREF SERIES PREC 2.5V SC-70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,802
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Product details
Overview
ADR03AKS-R2 from Analog Devices is a precision 2.5 V band gap voltage reference in a 5-lead SC70 package, featuring ±0.2% initial accuracy, 9 ppm/°C max temperature coefficient (A grade), 5 µVp-p (0.1 Hz to 10 Hz) low noise, and operation from 4.5 V to 36 V supply. It delivers 10 mA output current and supports industrial temperature range (−40°C to +125°C), enabling use in high-resolution ADC biasing and portable instrumentation.
For engineers reviewing the ADR03AKS-R2 datasheet, ADR03AKS-R2 pinout, ADR03AKS-R2 application, or ADR03AKS-R2 equivalent, key selection criteria include its ultracompact SC70 footprint, TRIM and TEMP pins for output fine-tuning and on-chip temperature monitoring, and compatibility with space-constrained precision analog signal chains requiring stable 2.5 V references.
Technical Context
The ADR03AKS-R2 implements a trimmed band gap core with internal curvature compensation, delivering stable 2.5 V output across wide input voltage (4.5 V–36 V) and temperature (−40°C to +125°C) ranges. Its TRIM pin allows ±0.5% output adjustment via external resistor network, while the TEMP pin provides 550 mV baseline output with 1.96 mV/°C sensitivity for system-level thermal diagnostics.
Designed for low-noise, low-drift applications, it achieves 5 µVp-p (0.1 Hz–10 Hz) noise and 50 ppm long-term stability over 1000 hours without requiring external capacitors. Load regulation is specified at 25–70 ppm/mA and line regulation at 7–30 ppm/V, supporting robust performance under varying source and load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±5 mV (A/C grades); enables direct interface with 2.5 V ADC reference inputs and DACs |
| Initial Accuracy | ±0.2% (±5 mV); eliminates need for post-manufacturing calibration in mid-precision systems |
| Temp Coefficient | 9 ppm/°C max (SC70, A grade); ensures ≤0.9 mV drift over −40°C to +125°C span |
| Voltage Noise | 5 µVp-p, 0.1 Hz–10 Hz; preserves SNR in 16-bit+ data acquisition front-ends |
| Supply Range | 4.5 V to 36 V; supports single-supply operation from Li-ion batteries up to industrial rails |
| Output Current | 10 mA; drives ADC reference inputs, op-amp bias networks, and small sensor excitation loads |
| Quiescent Current | 0.65–1.0 mA; enables battery-powered designs with multi-year operational life |
Pinout & Package
ADR03AKS-R2 is housed in a 5-lead SC70 (KS-5) surface-mount package (2.0 mm × 1.25 mm, 0.95 mm height), optimized for high-density PCB layouts. Pin 1 is marked by a dot; device orientation follows JEDEC MO-203 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 3) | Input Supply | Accepts 4.5 V–36 V unregulated input; dropout voltage ≤2 V at full load |
| GND (Pin 5) | Reference Ground | Primary return path for output current and internal circuitry; must be low-impedance |
| VOUT (Pin 1) | Stable Output | 2.5 V precision reference; capable of sourcing/sinking up to 10 mA |
| TRIM (Pin 2) | Output Adjustment | Connects to external resistor divider for ±0.5% fine-tuning of VOUT |
| TEMP (Pin 4) | Temperature Sensor | Provides 550 mV @ 25°C with 1.96 mV/°C slope; used for ambient or die temperature monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Ultracompact SC70 packaging | 2.0 mm × 1.25 mm footprint reduces board area by >60% vs. SOIC alternatives |
| No external capacitor required | Enables immediate power-on stability without layout overhead or BOM cost |
| Integrated temperature sensing | Eliminates discrete thermistor or IC for thermal monitoring in compact systems |
| TRIM pin for output calibration | Supports end-of-line trimming to meet tighter system-level accuracy requirements |
| Automotive-grade A grade option | SOIC variants qualified per AEC-Q100; SC70 variant meets extended industrial reliability |
Applications
| Portable Precision Data Loggers | Industrial 4–20 mA Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature, pressure, and humidity with 16-bit resolution over 10-year field deployment. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for SAR ADC and excitation of resistive bridge sensors. Use Value: Low 5 µVp-p noise and 9 ppm/°C drift ensure <0.01% measurement error across operating temperature and battery discharge cycle. |
Use Scenario: Loop-powered field transmitter converting RTD or thermocouple signals into standardized 4–20 mA output for PLC interfaces. IC Role / Device Role / Timing Role: Supplies precision 2.5 V reference for signal conditioning amplifier and DAC feedback path. Use Value: 4.5 V minimum input enables operation down to single Li-ion cell voltage; TRIM pin accommodates gain calibration during factory test. |
| Medical Point-of-Care Analyzers | PCMCIA/ExpressCard Instrumentation Modules |
Use Scenario: Handheld blood glucose or coagulation analyzers requiring clinical-grade accuracy in sub-100 cm³ enclosures. IC Role / Device Role / Timing Role: Serves as reference for photodiode transimpedance amplifier and ADC in optical detection channel. Use Value: SC70 package fits within tight mechanical constraints; TEMP pin monitors thermal drift of optical components for real-time correction. |
Use Scenario: Compact add-in cards for laptop-based test equipment performing waveform generation and capture. IC Role / Device Role / Timing Role: Generates 2.5 V reference for dual-channel 14-bit DAC and simultaneous sampling ADC. Use Value: 10 mA drive capability supports multiple analog channels without external buffers; no-input-capacitor operation simplifies card-level layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR03ARZ-REEL7 | 8-lead SOIC package; same 2.5 V output, ±0.1% initial accuracy (B grade), 3 ppm/°C typical TC | Higher accuracy and lower drift, but larger footprint and no SC70 form factor | Select when board space permits and tighter long-term stability is required |
| REF3025AIDBZR | 2.5 V, SOT-23-3, ±0.2% initial accuracy, 50 ppm/°C max TC, 22 µVp-p noise | Larger tempco and higher noise; lacks TRIM and TEMP pins | Select only for cost-sensitive, non-critical applications where size and feature set are secondary |
Compared with ADR03AKS-R2, the ADR03ARZ-REEL7 offers superior drift performance in SOIC but sacrifices miniaturization, while the REF3025AIDBZR trades away both precision features and diagnostic capability for lower unit cost and simpler integration.
Availability
ADR03AKS-R2 is available at Aetrix Electronics and suitable for portable instrumentation, industrial transmitters, medical analyzers, and PCMCIA-based test modules requiring stable component supply with guaranteed long-lifecycle support.
Supply support for ADR03AKS-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, serving industrial, automotive, communications, and healthcare markets.
The ADR03 is part of Analog Devices' precision voltage reference product line, engineered specifically for high-accuracy, low-drift, low-noise applications in space-constrained and thermally demanding environments.
FAQ
What is the maximum operating temperature range for the ADR03AKS-R2?
The ADR03AKS-R2 is fully specified over the extended industrial temperature range of −40°C to +125°C. All electrical characteristics-including output voltage accuracy, temperature coefficient, and noise-are guaranteed across this full range, making it suitable for under-hood automotive sensors and industrial control cabinets without derating.
Does the ADR03AKS-R2 require an input or output capacitor for stability?
No, the ADR03AKS-R2 is internally compensated and requires no external input or output capacitors for stable operation. This simplifies PCB layout, reduces BOM count, and avoids potential resonance issues-confirmed in the datasheet's "No external capacitor required" feature and transient response figures (e.g., Figure 33).
How is the TEMP pin on the ADR03AKS-R2 used in practice?
The TEMP pin on the ADR03AKS-R2 outputs 550 mV at 25°C with a linear 1.96 mV/°C slope, enabling direct connection to an ADC for die temperature monitoring. It is commonly used to compensate for thermal drift in adjacent precision components or to trigger thermal shutdown thresholds without adding discrete sensors.
Can the ADR03AKS-R2 replace the REF03 in existing designs?
The ADR03AKS-R2 is not pin-compatible with the REF03 due to differing pinouts (REF03 uses 8-lead SOIC with different terminal assignment). However, the 8-lead SOIC variant ADR03ARZ is explicitly designed as a drop-in replacement for REF03, retaining pinout and function while adding the TEMP pin-ADR03AKS-R2 requires layout revision.
What is the typical voltage noise performance of the ADR03AKS-R2?
The ADR03AKS-R2 delivers 5 µVp-p (0.1 Hz to 10 Hz) and 115 nV/√Hz (at 1 kHz), verified in Table 4 of the Rev. S datasheet. This low noise supports high-resolution data acquisition systems where reference noise directly limits effective number of bits (ENOB) in 16-bit+ ADCs.
ADR03AKS-R2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Reference Type:
- -
- Output Type:
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Tolerance:
- -
- Temperature Coefficient:
- -
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
ADR03AKS-R2 FAQ
1.How can I place an order for ADR03AKS-R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR03AKS-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 ADR03AKS-R2 reliable?
The price and inventory of ADR03AKS-R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR03AKS-R2 is usually 5 days.
3.What payment methods are accepted for ADR03AKS-R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR03AKS-R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR03AKS-R2?
ADR03AKS-R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR03AKS-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 ADR03AKS-R2?
For technical support, including ADR03AKS-R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR03AKS-R2 requirements.
6.How does Aetrix verify that ADR03AKS-R2 is sourced from the original manufacturer or authorized distributors?
All ADR03AKS-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 ADR03AKS-R2 meets industry standards.
7.What is the process for return or replacement of ADR03AKS-R2?
All ADR03AKS-R2 units undergo pre-shipment inspection (PSI). If there is an issue with ADR03AKS-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 ADR03AKS-R2 part is unused and in its original packaging.
Return procedure for ADR03AKS-R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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