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Texas Instruments REF102CUG4
- Part No.:
- REF102CUG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
REF102CUG4.pdf
- Description:
- IC VREF SERIES 0.025% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,882
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Product details
Overview
REF102CUG4 from Texas Instruments is a precision 10V voltage reference IC with ±2.5mV initial accuracy, 2.5ppm/°C max temperature drift, and 5ppm/1000hr long-term stability. It operates from 11.4V to 36V supply, delivers ±10mA output current, and features low 5µVPP (0.1Hz–10Hz) noise - optimized for high-resolution ADC/DAC reference and calibrated test equipment.
For engineers reviewing the REF102CUG4 datasheet, REF102CUG4 pinout, REF102CUG4 application, or REF102CUG4 equivalent, key selection criteria include its C-grade drift specification, SOIC-8 package compatibility, trim-adjustable output, and noise-reduction pin support for sub-200µVPP broadband performance.
Technical Context
The REF102CUG4 uses a laser-trimmed, compensated buried zener diode combined with an internal op amp and precision resistor network to generate a stable 10V output without thermal heating. Its drift is specified via the box method over –25°C to +85°C, with minimal sensitivity to line (1ppm/V max) and load (10ppm/mA max) variations.
It includes dedicated Noise Reduction and Trim terminals enabling external capacitor filtering (e.g., 1µF to ground) and ±3% output adjustment while preserving drift integrity. Quiescent current remains ≤1.4mA across temperature, supporting low-power instrumentation designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.000V ±2.5mV at 25°C - enables 16-bit+ system accuracy without calibration. |
| Temp Drift | 2.5ppm/°C max - ensures ≤±0.275mV error over –25°C to +85°C industrial range. |
| Long-Term Stability | 5ppm/1000hr typ - supports multi-year calibration validity in metrology-grade instruments. |
| Line Regulation | 1ppm/V max - maintains output accuracy despite ±2V supply ripple or variation. |
| Load Regulation | 10ppm/mA max (0 to +10mA) - sustains reference integrity under dynamic load switching. |
| Low-Frequency Noise | 5µVPP (0.1Hz–10Hz) - critical for high-resolution digital voltmeters and strain gauge bridges. |
| Supply Range | 11.4VDC to 36VDC - allows direct use with standard industrial 12V/24V rails. |
Pinout & Package
REF102CUG4 is housed in an SOIC-8 (D) package, 3.9mm × 4.9mm, 1.75mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-2-260°C rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Noise Reduction | Connects to external capacitor (e.g., 1µF) to form RC filter with internal 7kΩ resistor, reducing high-frequency zener noise by >60dB. |
| 2 | V+ | Positive supply input - accepts 11.4V–36V; internal regulation isolates output from supply ripple. |
| 3 | Com | Reference ground - must be star-connected to minimize common-mode errors in precision systems. |
| 4 | Trim | Adjusts output voltage ±3% via external potentiometer; TCR-matched internal resistors limit drift impact to ~0.008ppm/°C per mV. |
| 5 | NC | No connect - internally unconnected; must remain floating or grounded per layout guidelines. |
| 6 | VOUT | Stable 10V output - capable of sourcing +10mA/sinking –5mA; low impedance supports fast settling. |
| 7 | NC | No connect - internally unconnected; no routing or termination required. |
| 8 | NC | No connect - internally unconnected; leave unconnected per TI layout recommendations. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed zener core | Enables 2.5ppm/°C drift without heater - eliminates warm-up delay and thermal crosstalk in multi-channel systems. |
| Dedicated noise reduction pin | Supports external 1µF capacitor to reduce broadband noise from ~800µVPP to <200µVPP - essential for 24-bit sigma-delta converters. |
| Trim-adjustable output | ±3% fine-tuning capability preserves system-level calibration without sacrificing long-term stability or drift performance. |
| Wide supply tolerance | Operates from 11.4V to 36V - compatible with unregulated industrial supplies and eliminates need for pre-regulation stages. |
| Low quiescent current | ≤1.4mA max - enables battery-backed portable calibrators and low-power data loggers. |
Applications
| High-Resolution Data Acquisition | Precision Test Equipment |
|---|---|
|
Use Scenario: 24-bit delta-sigma ADC in automated test equipment requiring <1ppm total error budget. IC Role / Device Role / Timing Role: Primary voltage reference for ADC full-scale calibration and offset correction. Use Value: 5µVPP low-frequency noise and 2.5ppm/°C drift ensure ENOB ≥22 bits over temperature without recalibration. |
Use Scenario: Benchtop digital multimeter with 7½-digit resolution and auto-ranging capability. IC Role / Device Role / Timing Role: Stable 10V reference for DMM analog front-end gain/offset stages and internal DAC feedback. Use Value: 5ppm/1000hr stability enables annual calibration intervals; ±2.5mV initial error supports factory trim within 0.025% spec. |
| Calibrated Sensor Signal Conditioning | Industrial Process Instrumentation |
|
Use Scenario: Strain gauge bridge amplifier in load cell transmitter with 0.01% full-scale accuracy requirement. IC Role / Device Role / Timing Role: Excitation reference for ratiometric bridge measurement and ADC reference for digitization. Use Value: Matched line/load regulation (1ppm/V, 10ppm/mA) prevents gain shift during supply transients or sensor cable resistance changes. |
Use Scenario: 4–20mA loop-powered transmitter with HART communication and local display. IC Role / Device Role / Timing Role: Precision reference for DAC generating analog output and internal ADC monitoring supply/temperature. Use Value: 11.4V–36V operation supports wide loop compliance; low 1.4mA quiescent current leaves ample headroom for HART modem and display. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTZ1000ACH | Ultra-low 0.05ppm/°C drift, oven-controlled, higher power (≈10mA), TO-8 metal can | Used in primary standards labs and metrology-grade calibrators where ultimate stability outweighs size/power cost | Choose LTZ1000ACH only when sub-0.1ppm/°C drift is mandatory; REF102CUG4 offers better cost, size, and power efficiency for industrial-grade systems. |
| ADR441BRZ | 2.5ppm/°C drift, 10V output, SOIC-8, but higher 12µVPP noise and 3ppm/1000hr stability | Suitable for general-purpose 16–18-bit data acquisition where noise and aging are less critical | Choose ADR441BRZ if lower procurement cost is prioritized and 5µVPP noise or 5ppm/1000hr stability are not design-critical requirements. |
Compared with LTZ1000ACH and ADR441BRZ, REF102CUG4 uniquely balances ultra-low drift (2.5ppm/°C), low noise (5µVPP), and SOIC-8 manufacturability - making it optimal for cost-sensitive, high-accuracy industrial instrumentation where oven-controlled references are impractical.
Availability
REF102CUG4 is available at Aetrix Electronics and suitable for precision test equipment, high-resolution data acquisition systems, and industrial process transmitters requiring stable component supply with traceable lot history and extended lifecycle support.
Supply support for REF102CUG4 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, embedded processing, and high-reliability components for industrial, automotive, and instrumentation markets.
The REF102 product line was engineered specifically for high-stability, low-drift voltage reference applications in calibrated test gear, precision data converters, and sensor signal chains - emphasizing metrological integrity without thermal stabilization.
FAQ
What is the maximum capacitive load the REF102CUG4 can drive without instability?
The REF102CUG4 supports up to 1000pF capacitive load on its VOUT pin while maintaining stability, as confirmed in the Electrical Characteristics table. Exceeding this value may cause ringing or oscillation, especially when combined with long PCB traces. For larger loads, TI recommends using an external buffer amplifier such as the OPA227, as shown in Figure 7a of the REF102CUG4 datasheet.
Does the REF102CUG4 require external capacitors for basic operation?
Yes - a minimum 1µF tantalum capacitor between V+ and Com is required for stable operation, as specified in Figure 2 of the REF102CUG4 datasheet. This input bypass capacitor suppresses supply noise and prevents oscillation. The Noise Reduction pin also accepts an optional 1µF capacitor to ground for broadband noise reduction, though it is not mandatory for functional operation.
Can the REF102CUG4 be used in a negative reference configuration?
Yes - the REF102CUG4 can generate a precise –10V reference when paired with an external op amp such as the OPA227, as demonstrated in Figure 6b of the REF102CUG4 datasheet. In this configuration, the REF102CUG4's VOUT drives the op amp's non-inverting input, and the op amp inverts and buffers the output. Load current remains limited to the op amp's capabilities, not the REF102CUG4's ±10mA rating.
What is the warm-up time specification for the REF102CUG4?
The REF102CUG4 achieves 0.1% output accuracy within 15µs after power-on when the Noise Reduction pin is left floating, as stated in the Electrical Characteristics table. With a 1µF capacitor on the Noise Reduction pin, warm-up time increases slightly due to RC filtering, but remains under 100ms - significantly faster than oven-controlled references that require minutes to stabilize.
Is the REF102CUG4 pin-compatible with other REF102 variants like REF102AU or REF102BU?
Yes - all REF102 variants including REF102CUG4, REF102AU, and REF102BU share identical SOIC-8 (D) pinout and footprint. Differences are limited to grade-specific parameters: initial accuracy (±2.5mV for REF102CUG4 vs ±10mV for REF102AU), drift (2.5ppm/°C vs 10ppm/°C), and long-term stability. No PCB redesign is needed when upgrading from A- or B-grade to REF102CUG4.
REF102CUG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
REF102CUG4 FAQ
1.How can I place an order for REF102CUG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for REF102CUG4 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 REF102CUG4 reliable?
The price and inventory of REF102CUG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF102CUG4 is usually 5 days.
3.What payment methods are accepted for REF102CUG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF102CUG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF102CUG4?
REF102CUG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF102CUG4 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 REF102CUG4?
For technical support, including REF102CUG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF102CUG4 requirements.
6.How does Aetrix verify that REF102CUG4 is sourced from the original manufacturer or authorized distributors?
All REF102CUG4 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 REF102CUG4 meets industry standards.
7.What is the process for return or replacement of REF102CUG4?
All REF102CUG4 units undergo pre-shipment inspection (PSI). If there is an issue with REF102CUG4, 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 REF102CUG4 part is unused and in its original packaging.
Return procedure for REF102CUG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF102CUG4 Tags
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Texas Instruments
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