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Texas Instruments REF102CP
- Part No.:
- REF102CP
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
REF102CP.pdf
- Description:
- IC VREF SERIES 0.025% 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,563
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Product details
Overview
REF102CP from Texas Instruments is a precision 10V voltage reference IC with ±2.5mV initial error, 2.5ppm/°C max drift over –25°C to +85°C, and 5ppm/1000hr typical stability - designed for high-accuracy D/A and A/D converter references in test equipment and digital voltmeters.
For engineers reviewing the REF102CP datasheet, REF102CP pinout, REF102CP application, or REF102CP equivalent, key selection criteria include its laser-trimmed drift performance, low 5µVPP (0.1Hz–10Hz) noise, wide 11.4V–36V supply range, and DIP-8 package compatibility with legacy instrumentation layouts.
Technical Context
The REF102CP uses a compensated buried zener diode (DZ1) biased via internal resistor R4, with op amp A1 and laser-trimmed resistor network (R1–R3) establishing precise 10V output. Its drift specification follows the box method over –25°C to +85°C, bounding worst-case deviation to ±2.75mV.
It features a dedicated Noise Reduction pin (Pin 5) that forms a 22Hz low-pass filter with internal R6 (7kΩ) when a capacitor is added, reducing broadband noise from ~800µVPP to <200µVPP. Output trim capability (±3% range) is implemented via external potentiometer on Pin 5 without degrading drift beyond +0.008ppm/°C per mV adjusted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000V ±2.5mV at +25°C - enables direct use as 10V calibration standard without post-calibration trimming. |
| Tempco Drift | 2.5ppm/°C max (–25°C to +85°C) - ensures ≤±2.75mV total deviation across industrial temperature range. |
| Long-Term Stability | 5ppm/1000hr typ after 168hr stabilization - supports metrology-grade applications requiring minimal recalibration. |
| Line Regulation | 1ppm/V max (11.4V–36V) - maintains output accuracy despite input rail variation in unregulated power supplies. |
| Load Regulation | 10ppm/mA max (0–+10mA / 0––5mA) - sustains precision under varying sink/source loads in active reference circuits. |
| Low-Frequency Noise | 5µVPP (0.1Hz–10Hz) - critical for high-resolution ADCs and sensitive comparator thresholding. |
| Quiescent Current | 1.4mA max - enables low-power operation while maintaining full precision performance. |
Pinout & Package
REF102CP is housed in an 8-pin plastic dual in-line package (DIP-8), compatible with through-hole PCB assembly and legacy socketed instrumentation designs. The package marking is "REF102CP" with lead finish NIPDAU and MSL Level-2-260°C-1 year rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Noise Reduction | Connects to internal R6 (7kΩ); adding capacitor to ground forms 22Hz LPF to suppress zener high-frequency noise. |
| 2 | Common | Reference ground node; must be star-connected to minimize IR drop and noise coupling in precision layouts. |
| 3 | NC | No internal connection; leave unconnected to avoid parasitic coupling or unintended bias paths. |
| 4 | VOUT | Stable 10V output terminal; capable of sourcing +10mA or sinking –5mA with minimal regulation error. |
| 5 | Trim | Adjusts output voltage ±3% via external potentiometer; TCR-matched internal resistors limit drift impact to +0.008ppm/°C per mV. |
| 6 | V+ | Positive supply input (11.4V–36V DC); includes continuous short-circuit protection to V+ or Common. |
| 7 | NC | No internal connection; electrically isolated from die - no routing or grounding required. |
| 8 | NC | No internal connection; identical to Pin 3 and Pin 7 - all NC pins must remain floating. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed zener-based architecture | Delivers ±2.5mV initial accuracy and 2.5ppm/°C drift without heater - enabling fast warm-up (<15µs to 0.1%) and low power consumption. |
| Dedicated noise reduction terminal | Enables >60µVPP broadband noise reduction via simple 1µF capacitor - essential for sub-16-bit ADC reference integrity. |
| External output voltage trim | Supports ±3% adjustment with <0.01ppm/°C added drift penalty - allows field calibration without sacrificing long-term stability. |
| Wide supply voltage range | Operates from 11.4V to 36V DC - accommodates unregulated lab supplies and industrial rails without external regulators. |
| Robust thermal shock immunity | Maintains <±600µV output shift during rapid immersion from +25°C to +85°C Fluorinert - validated for harsh environmental test systems. |
Applications
| Digital Voltmeter Reference | High-Resolution ADC Reference |
|---|---|
|
Use Scenario: Used as the primary 10V reference in 6½-digit benchtop digital voltmeters requiring traceable calibration against national standards. IC Role / Device Role / Timing Role: Precision voltage standard defining full-scale measurement range and enabling auto-zero and linearity correction algorithms. Use Value: ±2.5mV initial error and 5ppm/1000hr stability ensure <0.001% reading uncertainty over 90-day calibration intervals without hardware adjustment. |
Use Scenario: Serves as reference for 20-bit successive-approximation ADCs in automated test equipment capturing low-level sensor signals. IC Role / Device Role / Timing Role: Low-noise (5µVPP), low-drift reference source ensuring LSB accuracy across temperature and time. Use Value: 2.5ppm/°C drift and 5µVPP noise prevent code transitions from drifting or smearing - preserving effective resolution at full scale. |
| Precision Current Source Reference | Comparator Threshold Standard |
|
Use Scenario: Provides stable 10V reference for op-amp-based Howland current sources delivering ±10mA to 4–20mA loop simulators. IC Role / Device Role / Timing Role: Fixed-voltage setpoint for feedback control of output current magnitude and direction. Use Value: 10ppm/mA load regulation ensures current accuracy remains within ±0.01% even as load impedance varies from 10Ω to 1kΩ. |
Use Scenario: Sets exact trip point for window comparators monitoring battery cell voltage in aerospace battery management systems. IC Role / Device Role / Timing Role: Absolute voltage threshold generator immune to supply ripple and thermal hysteresis. Use Value: 1ppm/V line regulation and <1µV/°C effective tempco eliminate false triggers caused by rail shifts or ambient cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1021BCN8-10 | ±10mV initial error, 3ppm/°C max drift, 10µVPP noise, TO-99 metal can package | Higher drift and noise; requires hermetic mounting and thermal shielding for equivalent stability | Preferred where EMI immunity and mechanical ruggedness outweigh drift/noise requirements |
| ADR441BRZ | ±1mV initial error, 1.5ppm/°C max drift, 1.8µVPP noise, SO-8 package, 4.096V output | Lower voltage output and surface-mount only; not pin-compatible or functionally interchangeable without circuit redesign | Selected when higher accuracy and lower noise justify redesign for 4.096V scaling in modern SAR ADC systems |
Compared with REF102CP, LT1021BCN8-10 trades precision for robustness in noisy environments, while ADR441BRZ delivers superior specs at 4.096V but requires layout changes and voltage-scaling logic - making REF102CP optimal for legacy 10V-referenced instrumentation needing drop-in DIP-8 replacement.
Availability
REF102CP is available at Aetrix Electronics and suitable for digital voltmeter calibration, high-resolution data acquisition, and precision current source design requiring stable component supply across extended production lifecycles.
Supply support for REF102CP 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 founded in 1930, specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and test & measurement markets.
The REF102 product line was engineered specifically for metrology-grade voltage referencing in portable and benchtop instrumentation - prioritizing low drift, low noise, and long-term stability over cost or integration density.
FAQ
What is the maximum operating temperature range for the REF102CP?
The REF102CP is specified for operation from –25°C to +85°C, with storage temperature rated from –40°C to +125°C. Its 2.5ppm/°C max drift applies across the full –25°C to +85°C range, and thermal shock testing confirms <±600µV output shift during rapid transitions between these extremes. This makes REF102CP suitable for industrial environments where ambient temperature fluctuates widely.
Can the REF102CP drive a 10kΩ load directly without external buffering?
Yes - the REF102CP can source up to +10mA and sink up to –5mA while maintaining its specified load regulation of 10ppm/mA. A 10kΩ load drawing 1mA at 10V falls well within this range, resulting in <10µV output shift. However, for loads below 1kΩ or dynamic current demands, external op-amp buffering is recommended to preserve noise and regulation performance.
Does the REF102CP require an external capacitor on the Noise Reduction pin for basic operation?
No - the REF102CP operates fully functional with the Noise Reduction pin (Pin 1) left unconnected. Adding a capacitor (e.g., 1µF tantalum) reduces high-frequency noise from ~800µVPP to <200µVPP but is optional. The 5µVPP low-frequency noise (0.1Hz–10Hz) is inherent to the zener core and unaffected by this capacitor.
Is the REF102CP pin-compatible with other REF102 variants like REF102CU or REF102AP?
Yes - all REF102 variants (including REF102CP, REF102CU, REF102AP, REF102AU) share identical DIP-8 or SO-8 pinouts and electrical interfaces. The differences lie solely in grade-specific parameters: REF102CP and REF102AP both use DIP-8 packaging and have ±2.5mV/±10mV initial error respectively, while REF102CU and REF102AU use SO-8 with matching accuracy grades.
How does the Trim pin (Pin 5) affect long-term stability of the REF102CP?
Adjusting the REF102CP output via Pin 5 introduces a drift penalty of +0.008ppm/°C per mV of trimmed voltage. For example, a ±300mV trim adds up to ±2.4ppm/°C to the base 2.5ppm/°C spec. TI recommends using high-stability cermet potentiometers and limiting trim to <±100mV in mission-critical applications to preserve long-term stability near the datasheet 5ppm/1000hr typ value.
REF102CP 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:
- ±0.025%
- Temperature Coefficient:
- 2.5ppm/°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
REF102CP FAQ
1.How can I place an order for REF102CP through Aetrix?
Please submit a Request for Quotation (RFQ) for REF102CP 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 REF102CP reliable?
The price and inventory of REF102CP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF102CP is usually 5 days.
3.What payment methods are accepted for REF102CP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF102CP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF102CP?
REF102CP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF102CP 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 REF102CP?
For technical support, including REF102CP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF102CP requirements.
6.How does Aetrix verify that REF102CP is sourced from the original manufacturer or authorized distributors?
All REF102CP 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 REF102CP meets industry standards.
7.What is the process for return or replacement of REF102CP?
All REF102CP units undergo pre-shipment inspection (PSI). If there is an issue with REF102CP, 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 REF102CP part is unused and in its original packaging.
Return procedure for REF102CP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF102CP Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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