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Texas Instruments REF102AP
- Part No.:
- REF102AP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF102AP.pdf
- Description:
- IC VREF SERIES 0.1% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
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Product details
Overview
REF102AP from Texas Instruments is a precision 10V voltage reference IC designed for high-accuracy analog systems. It delivers ±10 mV initial error, 2.5 ppm/°C max drift over –25°C to +85°C, and 5 ppm/1000 hr typical stability - enabling use in calibrated D/A and A/D converter references, precision current sources, and digital voltmeter front-ends.
For engineers reviewing the REF102AP datasheet, REF102AP pinout, REF102AP application, or REF102AP equivalent, key selection criteria include its laser-trimmed zener-based architecture, low 5 µVPP (0.1–10 Hz) noise, wide 11.4–36 V input range, and DIP-8 package compatibility with legacy instrumentation PCB layouts.
Technical Context
The REF102AP uses a compensated buried zener diode (DZ1) with laser-trimmed resistor network (R1–R6) to generate a stable 10V output without thermal heating. Its drift specification follows the box method, bounded by ±2.5 ppm/°C across –25°C to +85°C, and trim adjustment via Pin 5 affects output by ±3% with minimal impact on drift (≈0.008 ppm/°C per mV).
It features a dedicated Noise Reduction pin (Pin 7) that forms a 22 Hz low-pass filter with internal 7 kΩ resistor (R6), reducing broadband noise from ~800 µVPP to <200 µVPP when a 1 µF capacitor is applied - critical for low-noise metrology and test equipment signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000 V ±10 mV at +25°C - enables direct substitution in 10V reference designs without recalibration. |
| Temp Drift | 2.5 ppm/°C max (–25°C to +85°C) - ensures ≤±0.275 mV total drift over full industrial range. |
| Line Regulation | 1 ppm/V max (11.4–36 V input) - maintains output accuracy despite supply rail variation in unregulated systems. |
| Load Regulation | 10 ppm/mA max (0 to +10 mA / 0 to –5 mA) - supports stable operation with dynamic loads like ADC sample-and-hold circuits. |
| Low-Freq Noise | 5 µVPP typ (0.1–10 Hz) - meets stringent requirements for 6½-digit DVMs and precision weigh-scale amplifiers. |
| Quiescent Current | 1.4 mA max - allows use in low-power portable calibration tools without compromising reference stability. |
| Supply Range | 11.4 VDC to 36 VDC - accommodates standard industrial rails (e.g., +12 V, +15 V, +24 V) without external regulators. |
Pinout & Package
REF102AP is housed in an 8-pin plastic DIP (Dual In-line Package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch (2.54 mm), compatible with standard prototyping and production PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Noise Reduction | Connects to internal 7 kΩ resistor (R6); adding 1 µF to ground reduces high-frequency zener noise by >75%. |
| 2 | Common | Reference ground node; must be star-connected to minimize ground loop errors in precision systems. |
| 3 | VOUT | 10V regulated output; capable of sourcing +10 mA or sinking –5 mA with <10 ppm/mA load regulation. |
| 4 | Trim | Adjusts output voltage ±3% via external potentiometer; TCR-matched internal resistors limit drift penalty to 0.008 ppm/°C per mV. |
| 5 | V+ | Positive supply input; accepts 11.4–36 VDC; absolute max 40 V - no reverse-polarity protection. |
| 6 | NC | No connection; internally unused - must remain floating or grounded per layout best practices. |
| 7 | NC | No connection; internally unused - avoid routing signals near this pin to prevent coupling. |
| 8 | NC | No connection; internally unused - maintain clearance to reduce parasitic capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed zener core | Enables 2.5 ppm/°C max drift without heater - eliminates warm-up delay and thermal crosstalk in multi-channel systems. |
| External noise reduction | Pin 1 + 1 µF capacitor cuts broadband noise to <200 µVPP, supporting sub-µV resolution measurements. |
| Trimmable output | ±3% adjustment range with <0.01 ppm/°C/mV drift penalty - allows field calibration without redesigning feedback networks. |
| High PSRR | ≥100 dB rejection up to 10 kHz - maintains accuracy in noisy switch-mode power supply environments. |
| Stability after burn-in | 5 ppm/1000 hr typical (after 168 hr powered stabilization) - ensures long-term repeatability in automated test equipment. |
Applications
| Digital Voltmeter Front-End | Precision Data Acquisition System |
|---|---|
Use Scenario: High-resolution 6½-digit DVM requiring stable 10V reference for ADC full-scale calibration. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope or sigma-delta ADC conversion, directly setting measurement accuracy. Use Value: ±10 mV initial error and 2.5 ppm/°C drift ensure <0.001% reading uncertainty over temperature - meeting ANSI C12.20 Class 0.1 meter standards. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals with 16-bit+ resolution. IC Role / Device Role / Timing Role: Reference source for programmable gain instrumentation amplifier and successive-approximation ADC. Use Value: 5 µVPP (0.1–10 Hz) noise and 10 ppm/mA load regulation enable true 16-bit ENOB without oversampling or post-processing. |
| Automated Test Equipment (ATE) | Calibration Standard Generator |
Use Scenario: Rack-mounted ATE system performing parametric testing of op amps and voltage regulators. IC Role / Device Role / Timing Role: Stable excitation source for DUT biasing and measurement reference for precision voltage/current sourcing. Use Value: 5 ppm/1000 hr stability and 1 ppm/V line regulation eliminate drift-induced test timeouts during extended production runs. | Use Scenario: Portable handheld calibrator generating traceable 10V outputs for field verification of multimeters and data loggers. IC Role / Device Role / Timing Role: Core reference element in battery-powered, self-calibrating voltage standard with manual trim capability. Use Value: ±3% external trim range and low 1.4 mA quiescent current allow accurate field adjustment while extending battery life beyond 20 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF102AU | Same electrical specs, but SO-8 package (surface-mount); 2.5 ppm/°C drift, ±10 mV initial error. | Requires PCB rework for SMT assembly; lacks through-hole mechanical robustness for vibration-prone test fixtures. | Select REF102AU only when board space constraints or automated assembly mandate SO-8. |
| LT1021CH | 10V reference with 3 ppm/°C max drift, 20 µVPP noise (0.1–10 Hz), and 10 mA output drive - higher noise, wider drift tolerance. | Better suited for cost-sensitive industrial controls where 0.003% accuracy suffices; not recommended for metrology-grade instruments. | Choose LT1021CH only if budget limits prohibit REF102AP's premium performance, and system-level error budget allows ≥3× higher drift/noise. |
Compared with REF102AU and LT1021CH, the REF102AP uniquely combines DIP-8 mechanical reliability, sub-10 µVPP noise, and 2.5 ppm/°C drift - making it the only option among the three qualified for ANSI-certified calibration hardware and aerospace-grade data acquisition.
Availability
REF102AP is available at Aetrix Electronics and suitable for precision data acquisition systems, automated test equipment, and portable calibration standards requiring stable component supply and long-term parametric consistency.
Supply support for REF102AP 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision reference design.
The REF102 product line was engineered specifically for metrology-grade instrumentation, offering laser-trimmed zener stability without thermal heaters - targeting applications where warm-up time, power efficiency, and long-term drift are critical.
FAQ
What is the maximum input voltage rating for the REF102AP?
The REF102AP has an absolute maximum input voltage of +40 V on the V+ pin (Pin 5). Operation within the specified 11.4 V to 36 V range ensures full compliance with all published electrical characteristics, including 1 ppm/V line regulation and 2.5 ppm/°C drift. Exceeding +40 V risks permanent damage, as confirmed in the SBVS022B datasheet Absolute Maximum Ratings table.
Does the REF102AP require external capacitors for stability?
The REF102AP does not require output capacitors for basic stability, but a 1 µF tantalum capacitor between Pin 1 (Noise Reduction) and ground is recommended to reduce high-frequency zener noise by >75%. The device remains stable with capacitive loads up to 1000 pF on VOUT (Pin 3), per Electrical Characteristics table - no series resistance or isolation is needed for typical PCB layouts.
Can the REF102AP be used in dual-supply circuits?
The REF102AP is a single-supply device designed for positive input voltages only (11.4–36 V on Pin 5). It does not support negative supply rails or bipolar operation. However, its output can interface with dual-supply op amps (e.g., OPA227 in Figure 6) to generate precision –10V references - the REF102AP itself must always be powered from a positive rail referenced to its Common (Pin 2).
What is the warm-up time specification for the REF102AP?
The REF102AP achieves 0.1% output accuracy within 15 µs after power turn-on when the Noise Reduction pin (Pin 1) is left floating, as measured under VS = +15 V conditions. This fast settling is enabled by its heaterless zener architecture - significantly faster than oven-controlled references, and suitable for burst-mode instrumentation where rapid power cycling is required.
Is the REF102AP RoHS compliant?
Yes, the REF102AP is RoHS compliant, with lead finish specified as NIPDAU (Nickel/Palladium/Gold) per TI's Package Option Addendum. It meets JEDEC MSL Level-2-260°C-1 Year moisture sensitivity requirements and is rated for industrial temperature operation (–25°C to +85°C), as verified in TI's official ordering documentation and material declarations.
REF102AP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 5µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 11.4V ~ 36V
- Current - Supply:
- 1.4mA
- Current - Cathode:
- -
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
REF102AP FAQ
1.How can I place an order for REF102AP through Aetrix?
Please submit a Request for Quotation (RFQ) for REF102AP 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 REF102AP reliable?
The price and inventory of REF102AP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF102AP is usually 5 days.
3.What payment methods are accepted for REF102AP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF102AP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF102AP?
REF102AP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF102AP 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 REF102AP?
For technical support, including REF102AP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF102AP requirements.
6.How does Aetrix verify that REF102AP is sourced from the original manufacturer or authorized distributors?
All REF102AP 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 REF102AP meets industry standards.
7.What is the process for return or replacement of REF102AP?
All REF102AP units undergo pre-shipment inspection (PSI). If there is an issue with REF102AP, 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 REF102AP part is unused and in its original packaging.
Return procedure for REF102AP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF102AP Tags
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