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Analog Devices Inc. REF43GS-REEL7
- Part No.:
- REF43GS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF43GS-REEL7.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,967
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Product details
Overview
REF43GS-REEL7 from Analog Devices is a precision 2.5 V voltage reference IC with 0.10% initial accuracy, 25 ppm/°C temperature coefficient, and 8-pin SOIC package. It delivers stable output under varying supply, load, and temperature conditions, and is used as a reference in 8-, 10-, and 12-bit data acquisition systems.
For engineers reviewing the REF43GS-REEL7 datasheet, REF43GS-REEL7 pinout, REF43GS-REEL7 application, or REF43GS-REEL7 equivalent, key selection criteria include initial voltage tolerance, thermal drift performance, SOIC-8 compatibility, low power operation, and zener-zap trimmed stability for high-accuracy analog signal chains.
Technical Context
The REF43GS-REEL7 employs zener-zap trimming for both output voltage and temperature coefficient calibration, ensuring tight initial tolerance and predictable thermal behavior. Its curvature correction circuit actively compensates for non-linear thermal drift typical of bandgap references.
This device operates without external components, supports input voltages up to 36 V, and maintains regulation across load currents from 0 mA to 10 mA. It is specified over –40°C to +85°C and features ESD protection rated to 4000 V HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.10% (2.4975 V to 2.5025 V at 25°C), enabling precise ADC/DAC biasing |
| Tempco | 25 ppm/°C max (–40°C to +85°C), limiting full-range error to ±625 µV |
| Input Voltage Range | 4.5 V to 36 V, allowing direct use with common industrial rails and battery-backed supplies |
| Load Regulation | 0.01%/mA (100 ppm/mA), maintaining stability across 0–10 mA load variation |
| Quiescent Current | 1.2 mA typical, supporting low-power portable and battery-operated instrumentation |
| Long-Term Stability | 50 ppm/1000 hrs, ensuring minimal drift during extended system deployment |
Pinout & Package
REF43GS-REEL7 is housed in an 8-pin SOIC (R-8) package per JEDEC MS-012AA, with 1.27 mm pitch, 5.00 mm × 4.00 mm body, and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN | Positive input supply terminal; requires ≥4.5 V and ≤36 V for regulation |
| 2 | TEMP | Temperature monitor output; provides proportional-to-absolute-temperature (PTAT) voltage for diagnostics |
| 3 | GND | Circuit ground reference; must be low-impedance return path for VIN and VOUT |
| 4 | GND | Second ground terminal; electrically tied to Pin 3 internally; improves noise rejection |
| 5 | TRIM | Trim adjustment node; factory-laser-trimmed; not user-accessible in production |
| 6 | VOUT | Precision 2.5 V output; buffered, low-impedance source for ADC reference or sensor excitation |
| 7 | VOUT SENSE | Force-sense feedback terminal; enables Kelvin connection to eliminate trace resistance error |
| 8 | NC | No connect; internally unconnected; must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Zener-zap trimming | Simultaneous calibration of output voltage and temperature coefficient ensures guaranteed 0.10% initial accuracy and 25 ppm/°C drift |
| Curvature correction circuit | Reduces parabolic thermal error inherent in bandgap designs, improving linearity over –40°C to +85°C |
| Force-sense output architecture | VOUT and VOUT SENSE pins enable 4-wire remote sensing to cancel PCB trace resistance effects |
| ESD robustness | 4000 V HBM rating with integrated protection, reducing susceptibility to handling damage in manufacturing environments |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered environmental sensors record temperature, humidity, and pressure with 12-bit ADCs over multi-year deployments. IC Role / Device Role / Timing Role: REF43GS-REEL7 serves as the primary voltage reference for successive-approximation ADCs, defining full-scale range. Use Value: 25 ppm/°C tempco and 50 ppm/1000 hrs long-term stability ensure measurement repeatability without field recalibration. | Use Scenario: Modular I/O cards in programmable logic controllers condition 4–20 mA current loop signals into digital values. IC Role / Device Role / Timing Role: REF43GS-REEL7 provides ratiometric reference for sigma-delta ADCs measuring isolated analog inputs. Use Value: Force-sense architecture eliminates errors from PCB copper resistance, critical for 0.1% accuracy class modules. |
| Medical Patient Monitors | Test & Measurement Equipment |
Use Scenario: Compact bedside monitors digitize ECG, SpO₂, and NIBP waveforms using low-noise front-end signal chains. IC Role / Device Role / Timing Role: REF43GS-REEL7 supplies reference voltage to precision instrumentation amplifiers and anti-aliasing filters. Use Value: 1.2 mA quiescent current supports ultra-low-power sleep modes while retaining reference integrity during wake-up transitions. | Use Scenario: Benchtop multimeters and calibrators require traceable, stable references for DC voltage measurement functions. IC Role / Device Role / Timing Role: REF43GS-REEL7 acts as internal reference for auto-ranging ADC subsystems and DAC-based output stages. Use Value: Zener-zap trimming guarantees 0.10% initial accuracy-meeting Class II metrology requirements without post-manufacture calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR431BRZ-R7 | 2.5 V output, 0.04% initial accuracy, 3 ppm/°C tempco, higher cost, SOIC-8 | Better stability for metrology-grade instruments; tighter spec limits increase BOM cost | Select when <1 ppm/°C drift and <0.05% tolerance are required; REF43GS-REEL7 remains optimal for cost-sensitive 12-bit DAQ |
| LM4040C25IDCKR | 2.5 V shunt reference, 0.5% initial accuracy, 100 ppm/°C tempco, SOT-23-3 | Lower integration (no TEMP/SENSE pins), higher drift, smaller footprint | Choose for space-constrained, lower-accuracy applications where force-sense and temperature monitoring are unnecessary |
Compared with ADR431BRZ-R7 and LM4040C25IDCKR, REF43GS-REEL7 uniquely balances 0.10% accuracy, 25 ppm/°C drift, force-sense capability, and temperature monitoring in an industry-standard SOIC-8-making it ideal for mid-tier industrial and medical data acquisition where performance and cost coexist.
Availability
REF43GS-REEL7 is available at Aetrix Electronics and suitable for portable data loggers, industrial PLC analog inputs, and medical patient monitors requiring stable component supply across multi-year production cycles.
Supply support for REF43GS-REEL7 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The REF43 family was designed specifically for precision data acquisition systems needing stable, low-drift voltage references in 8-bit to 12-bit applications-emphasizing factory-trimmed accuracy and thermal linearity.
FAQ
What is the maximum input voltage for REF43GS-REEL7?
The REF43GS-REEL7 supports an absolute maximum input voltage of 36 V. Operation above this level risks permanent damage. For reliable regulation, VIN must exceed VOUT by at least 2 V-so minimum recommended input is 4.5 V. The device draws only 1.2 mA quiescent current, making it suitable for wide-input industrial supplies without excessive power dissipation.
Does REF43GS-REEL7 require external capacitors for stability?
No, REF43GS-REEL7 is internally compensated and operates stably without external capacitors across its full load range (0–10 mA). However, a 0.1 µF ceramic bypass capacitor placed close to the VIN pin is recommended to suppress high-frequency noise from switching supplies. No capacitor is needed on VOUT unless driving highly capacitive loads (>1 nF), which may require isolation resistor per datasheet Figure 22.
How does the force-sense feature of REF43GS-REEL7 improve accuracy?
The REF43GS-REEL7 uses separate VOUT and VOUT SENSE pins to implement a 4-wire Kelvin connection. This allows the internal amplifier to regulate voltage directly at the load point, eliminating errors caused by voltage drop across PCB traces or connectors. In practice, this maintains 2.5 V ±0.10% accuracy even with 0.5 Ω series resistance-critical for high-precision ADC reference routing.
Is REF43GS-REEL7 RoHS compliant and lead-free?
Yes, REF43GS-REEL7 is RoHS compliant and lead-free. Per the ordering guide, the "-REEL7" suffix denotes tape-and-reel packaging, and the part carries the "Z" designation in related variants (e.g., REF43GSZ-REEL7) indicating Pb-free construction. Analog Devices confirms full compliance with EU RoHS Directive 2011/65/EU and J-STD-609 Category 3 marking.
Can REF43GS-REEL7 be used in automotive applications?
REF43GS-REEL7 is qualified for operation from –40°C to +85°C, meeting standard industrial temperature range requirements. While it is not AEC-Q200 qualified or automotive grade, its thermal performance, long-term stability (50 ppm/1000 hrs), and ESD robustness (4000 V HBM) make it suitable for under-hood or cabin-located non-safety-critical instrumentation-provided system-level qualification is performed per ISO/TS 16949 guidelines.
REF43GS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 25ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 10µVrms
- Voltage - Input:
- 4.5V ~ 40V
- Current - Supply:
- 450µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF43GS-REEL7 FAQ
1.How can I place an order for REF43GS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF43GS-REEL7 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 REF43GS-REEL7 reliable?
The price and inventory of REF43GS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF43GS-REEL7 is usually 5 days.
3.What payment methods are accepted for REF43GS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF43GS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF43GS-REEL7?
REF43GS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF43GS-REEL7 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 REF43GS-REEL7?
For technical support, including REF43GS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF43GS-REEL7 requirements.
6.How does Aetrix verify that REF43GS-REEL7 is sourced from the original manufacturer or authorized distributors?
All REF43GS-REEL7 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 REF43GS-REEL7 meets industry standards.
7.What is the process for return or replacement of REF43GS-REEL7?
All REF43GS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with REF43GS-REEL7, 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 REF43GS-REEL7 part is unused and in its original packaging.
Return procedure for REF43GS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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