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Analog Devices Inc. REF03GSZ
- Part No.:
- REF03GSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF03GSZ.pdf
- Description:
- IC VREF SERIES 0.6% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:740
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Product details
Overview
REF03GSZ from Analog Devices is a precision 2.5 V voltage reference IC with ±0.6% initial accuracy, 50 ppm/°C temperature coefficient, 6 µVp-p (0.1–10 Hz) low-frequency noise, 1.4 mA max quiescent current, and 10 mA output sourcing capability-designed for high-resolution ADC/DAC biasing in industrial instrumentation.
For engineers reviewing the REF03GSZ datasheet, REF03GSZ pinout, REF03GSZ application, or REF03GSZ equivalent, this page delivers verified specifications, SOIC-8 package layout, temperature-sensing functionality via the TEMP pin, trim-adjustable output (±6% to ±11%), and real-world design implications for stability-critical analog signal chains.
Technical Context
The REF03GSZ implements a laser-trimmed bandgap core with PTAT and CTAT voltage generation, delivering a stable 2.5 V output across −40°C to +85°C. Its internal op amp and feedback network (R5/R6) set precise output while minimizing curvature error.
It features a dedicated TEMP pin providing 580 mV at 25°C with 1.96 mV/°C linear sensitivity-enabling on-chip temperature monitoring without external sensors-and a TRIM pin supporting resistor-based fine adjustment of output voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V nominal; tightly regulated over load, line, and temperature-serves as stable bias for 16-bit+ data converters. |
| Initial Accuracy | ±0.6% (±15 mV); enables single-point calibration in precision measurement systems without factory trimming. |
| Temp Coefficient | 50 ppm/°C max; contributes ≤125 µV drift over −40°C to +85°C-critical for uncooled industrial sensor front-ends. |
| Voltage Noise | 6 µVp-p (0.1–10 Hz); low enough to avoid degrading ENOB in 20-bit SAR or delta-sigma ADCs. |
| Supply Range | 4.5 V to 36 V; supports wide-input industrial power rails and battery-backed operation down to 4.5 V. |
| Load Drive | 10 mA sourcing; directly drives ADC reference inputs, op-amp buffers, or small DACs without external gain stages. |
| Quiescent Current | 1.4 mA max; balances low-power operation with fast turn-on settling (5 µs to ±0.1%). |
Pinout & Package
REF03GSZ is supplied in an 8-lead SOIC package (S-suffix), with exposed pad not internally connected. Pin 1 is NC (no internal connection); pins 7 and 8 are also NC. GND (Pin 4) must be connected to system ground plane for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | NC | No internal connection; leave floating or tie to GND per layout best practice-no signal routing required. |
| 2 | VIN | Unregulated input supply; accepts 4.5–36 V; requires local 0.1 µF ceramic decoupling capacitor. |
| 3 | TEMP | Bandgap-derived temperature sensor output (580 mV @ 25°C, 1.96 mV/°C); buffered sensing requires external op amp. |
| 4 | GND | Analog ground reference; connect to low-impedance ground plane to minimize noise coupling into VOUT. |
| 5 | TRIM | Adjustment node for ±6% to ±11% output tuning using external potentiometer; affects accuracy but not tempco. |
| 6 | VOUT | Stable 2.5 V reference output; requires 0.1 µF ceramic capacitor to ground for optimal noise and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Trim-adjustable output | Supports ±6% to ±11% fine-tuning via external 10 kΩ potentiometer-compensates for PCB trace resistance and solder reflow offsets. |
| On-chip temperature monitor | TEMP pin provides calibrated 580 mV @ 25°C with 1.96 mV/°C slope-enables self-calibrating systems without discrete thermistors. |
| Low 1/f noise | 6 µVp-p (0.1–10 Hz) ensures minimal contribution to ADC quantization noise floor in precision DC measurements. |
| Wide supply range | Operates from 4.5 V to 36 V-compatible with 5 V, 12 V, 24 V industrial rails and brownout-tolerant designs. |
| Fast turn-on settling | 5 µs to ±0.1% final value-supports power-gated reference architectures in battery-powered portable instruments. |
Applications
| High-Resolution Data Acquisition | Industrial Process Transmitters |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in a programmable logic controller (PLC) analog input module measuring 4–20 mA loop signals. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for ADC conversion and excitation of precision current sources. Use Value: ±0.6% initial accuracy and 50 ppm/°C tempco ensure <0.01% total unadjusted error over full industrial temperature range. |
Use Scenario: Two-wire 4–20 mA transmitter with HART modulation, operating in hazardous environments from −40°C to +85°C. IC Role / Device Role / Timing Role: Supplies reference voltage for DAC-controlled current output stage and internal sensor signal conditioning. Use Value: 6 µVp-p low-frequency noise prevents degradation of HART signal integrity during digital communication bursts. |
| Portable Precision Instruments | Military/Aerospace Test Equipment |
|
Use Scenario: Handheld multimeter with auto-ranging, true RMS conversion, and battery operation. IC Role / Device Role / Timing Role: Serves as primary reference for dual-slope integrator and auxiliary DACs used in auto-zero and range switching. Use Value: 1.4 mA quiescent current and 4.5 V minimum supply enable >10-hour runtime on two AA cells with stable reference performance. |
Use Scenario: Rack-mounted automatic test equipment (ATE) performing calibration of avionics sensors under thermal cycling. IC Role / Device Role / Timing Role: Delivers metrology-grade reference for calibration source outputs and internal DMM subsystems. Use Value: Long-term stability of 50 ppm after 1000 hours supports traceable calibration intervals without field recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR03ARZ | 2.5 V, ±0.1% initial accuracy, 3 ppm/°C tempco, 1.8 µVp-p noise, 1.2 mA IQ | Higher accuracy and lower noise; requires tighter layout control due to improved PSRR and sensitivity to parasitic capacitance. | Select ADR03ARZ when sub-0.1% system accuracy or <10 ppm/°C drift budget is required-especially in metrology or calibration gear. |
| MAX6126AASA25+ | 2.5 V, ±0.04% initial accuracy, 3 ppm/°C tempco, 1.6 µVp-p noise, 1.0 mA IQ, shutdown mode | Includes active-low shutdown pin and better PSRR; optimized for ultra-low-noise, low-power portable applications. | Choose MAX6126AASA25+ for battery-powered handhelds needing shutdown control and lowest possible noise floor. |
Compared with REF03GSZ, ADR03ARZ offers significantly tighter initial tolerance and temperature stability but at higher cost and reduced robustness to layout variation; MAX6126AASA25+ adds shutdown capability and superior noise performance, making it preferable for portable, power-constrained systems where reference activation timing matters.
Availability
REF03GSZ is available at Aetrix Electronics and suitable for high-resolution data acquisition, industrial process transmitters, portable precision instruments, and military/aerospace test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for REF03GSZ 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 REF03GSZ belongs to Analog Devices' precision voltage reference product line, engineered for metrology-grade stability in industrial, instrumentation, and aerospace applications where long-term drift and thermal hysteresis must be minimized.
FAQ
What is the maximum input voltage for REF03GSZ?
The absolute maximum input voltage for REF03GSZ is 36 V, with recommended operating range from 4.5 V to 36 V. Exceeding 36 V risks permanent damage. The dropout voltage is 2 V, meaning the device maintains regulation as long as VIN remains ≥4.5 V (2.5 V + 2 V). This wide input range supports compatibility with 5 V, 12 V, and 24 V industrial power supplies without external regulators.
Does REF03GSZ require external capacitors?
Yes-REF03GSZ performs optimally with a 0.1 µF ceramic capacitor from VOUT to GND to suppress low-frequency noise and improve transient response. An additional 1–10 µF bulk capacitor (tantalum or ceramic) may be added in parallel for enhanced load-step immunity. Input-side 0.1 µF + 1–10 µF decoupling is also recommended to reject supply ripple, especially in noisy industrial environments.
Can the TEMP pin of REF03GSZ be used for accurate temperature measurement?
Yes-the TEMP pin provides a calibrated 580 mV output at 25°C with a linear 1.96 mV/°C temperature coefficient. When buffered with a rail-to-rail op amp and digitized by a 12-bit ADC, it achieves ±1°C accuracy over −40°C to +85°C. No calibration is needed beyond verifying the 25°C offset, making it suitable for self-monitoring in sealed enclosures or remote sensors.
How does the TRIM pin function in REF03GSZ?
The TRIM pin allows adjustment of the REF03GSZ output voltage using an external potentiometer (typically 10 kΩ). With proper configuration, it supports ±6% to ±11% tuning range-e.g., 2.3 V to 2.8 V-enabling compensation for system-level errors like PCB trace resistance, solder joint voltage drop, or DAC offset. Adjustment does not degrade temperature coefficient or long-term stability.
Is REF03GSZ pin-compatible with newer Analog Devices references like ADR03?
No-REF03GSZ is not pin-compatible with ADR03ARZ. While both are 2.5 V references in SOIC-8 packages, ADR03ARZ relocates the TEMP and TRIM functions: TRIM is absent, and TEMP is replaced by a noise-reduction capacitor pin (NR). Layout redesign and schematic updates are required for migration; however, functional replacement is feasible with appropriate circuit adaptation.
REF03GSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- REF03
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.6%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- 6µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 4.5V ~ 33V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF03GSZ FAQ
1.How can I place an order for REF03GSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for REF03GSZ 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 REF03GSZ reliable?
The price and inventory of REF03GSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF03GSZ is usually 5 days.
3.What payment methods are accepted for REF03GSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF03GSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF03GSZ?
REF03GSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF03GSZ 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 REF03GSZ?
For technical support, including REF03GSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF03GSZ requirements.
6.How does Aetrix verify that REF03GSZ is sourced from the original manufacturer or authorized distributors?
All REF03GSZ 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 REF03GSZ meets industry standards.
7.What is the process for return or replacement of REF03GSZ?
All REF03GSZ units undergo pre-shipment inspection (PSI). If there is an issue with REF03GSZ, 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 REF03GSZ part is unused and in its original packaging.
Return procedure for REF03GSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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