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Texas Instruments REF4132A33DBVR
- Part No.:
- REF4132A33DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
REF4132A33DBVR.pdf
- Description:
- IC VREF SERIES 0.05% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,851
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Product details
Overview
REF4132A33DBVR from Texas Instruments is a precision 3.3 V CMOS series voltage reference with ±0.05% initial accuracy, 12 ppm/°C max temperature coefficient (A grade), and 100 µA max quiescent current. It delivers ±10 mA output current in a 5-pin SOT-23 package and is optimized for high-resolution data acquisition systems requiring stable, low-noise reference voltage under wide temperature conditions (−40°C to +125°C).
For engineers reviewing the REF4132A33DBVR datasheet, REF4132A33DBVR pinout, REF4132A33DBVR application, or REF4132A33DBVR equivalent, key selection considerations include dropout voltage (50 mV at zero load), 15 µVPP (0.1–10 Hz) low-frequency noise, enable-controlled shutdown mode (2.5 µA), thermal hysteresis (35 ppm), and long-term stability (30 ppm/1000 hrs) - all critical for precision ADC/DAC biasing and battery-powered instrumentation.
Technical Context
The REF4132A33DBVR implements a trimmed bandgap core with integrated output buffer and enable-controlled power gating. Its architecture supports both sourcing and sinking up to ±10 mA while maintaining sub-100 ppm total error across −40°C to +125°C, enabled by low-drift resistor networks and on-die thermal compensation.
It operates as a series reference with ultra-low dropout (50–500 mV depending on load), accepts input voltages as low as VREF + VDO, and features a dedicated EN pin that places the output in high-impedance state during shutdown - eliminating need for external switches in power-gated sensor nodes or portable DAQ modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±0.05% (±1.65 mV absolute tolerance at 25°C) |
| Tempco (A grade) | 12 ppm/°C max (≤0.4 mV drift over −40°C to +125°C) |
| Quiescent Current | 100 µA max active / 2.5 µA max shutdown (enables >10-year battery life in metering) |
| Dropout Voltage | 50 mV at 0 mA load; 500 mV at 10 mA load (supports operation from 3.35 V supply) |
| Low-Freq Noise | 15 µVPP (0.1–10 Hz) - enables <20-bit effective resolution in sigma-delta ADCs |
| Long-Term Stability | 30 ppm/1000 hrs (predictable aging behavior for calibration-critical test equipment) |
| Thermal Hysteresis | 35 ppm (ensures repeatable reference value after thermal cycling in industrial enclosures) |
Pinout & Package
SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect | Internally unconnected; must remain floating - no routing or soldering required |
| 2 - GND | Analog ground reference | Primary return path for reference core and buffer; requires low-impedance connection to system AGND plane |
| 3 - EN | Digital enable input | Active-high logic control: ≥1.6 V enables output; ≤0.5 V disables output and reduces IQ to 2.5 µA |
| 4 - VIN | Reference input supply | Accepts 3.35 V to 5.5 V; must be bypassed with 0.1 µF ceramic capacitor placed <2 mm from pin |
| 5 - VREF | Precision output terminal | 3.3 V regulated source/sink node; requires 0.1 µF ceramic capacitor directly at pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Pin-to-pin replacement for LM4132 | Enables drop-in upgrade path with improved tempco (12 vs. 50 ppm/°C) and lower noise (15 vs. 35 µVPP) |
| Enable-controlled shutdown | Reduces system standby power by >97% versus always-on references - critical for IoT edge sensors |
| Stable with 0.1–10 µF output capacitance | Eliminates need for specialized low-ESR capacitors; supports standard X5R/X7R ceramics across full temp range |
| Low thermal hysteresis (35 ppm) | Ensures measurement repeatability in cyclic environments (e.g., HVAC controllers, automotive ECUs) |
| High PSRR (>60 dB @ 1 kHz) | Maintains reference integrity despite noisy shared rail supplies in mixed-signal PLC modules |
Applications
| Portable Battery Test Equipment | Industrial PLC Analog I/O Modules |
|---|---|
|
Use Scenario: Precision DC voltage sourcing and measurement during cell-level battery characterization under variable temperature. IC Role / Device Role / Timing Role: Primary 3.3 V reference for 24-bit delta-sigma ADC (e.g., ADS1287) and DAC-based current source calibration. Use Value: 12 ppm/°C tempco and 15 µVPP noise ensure <±0.01% voltage accuracy across −20°C to +70°C ambient, meeting ISO 17025 traceability requirements. |
Use Scenario: Multi-channel analog input conditioning in DIN-rail mounted programmable logic controllers with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Stable excitation reference for RTD/thermocouple signal chains and ADC reference for isolated 16-bit SAR converters. Use Value: 30 ppm/1000 hrs long-term stability minimizes recalibration frequency; EN pin enables synchronized power-down during idle cycles to reduce thermal drift accumulation. |
| Field Transmitters (Pressure/Flow) | Medical LCR Meters |
|
Use Scenario: Two-wire 4–20 mA smart transmitter with onboard microcontroller and sensor front-end operating in harsh industrial environments. IC Role / Device Role / Timing Role: Low-power 3.3 V reference for sensor bridge excitation and ADC reference in ultra-low-quiescent-current design. Use Value: 100 µA max IQ and −40°C to +125°C rating allow direct integration into transmitter head without heatsinking or derating. |
Use Scenario: High-accuracy impedance measurement of biomedical electrodes and passive components using AC excitation and synchronous detection. IC Role / Device Role / Timing Role: Dual-role reference: provides clean 3.3 V bias for analog front-end op-amps and precise reference for 20-bit ADC sampling clock domain. Use Value: 35 ppm thermal hysteresis ensures repeatable measurements after field installation and seasonal ambient shifts - critical for FDA-compliant device validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3433RTCT | 3.3 V, 0.05% initial accuracy, 10 ppm/°C, but higher IQ (115 µA) and no EN pin | Lacks enable control; unsuitable for duty-cycled or sleep-mode systems | Choose when lowest possible tempco is prioritized over power gating capability |
| ADR4533BKSZ-REEL7 | 3.3 V, 0.02% initial accuracy, 3 ppm/°C, but larger LFCSP-6 package and 500 µA IQ | Higher cost and board area; not suitable for space-constrained portable designs | Choose only when metrology-grade stability (<5 ppm total error) justifies size and power penalty |
Compared with REF4132A33DBVR, REF3433RTCT offers marginally better drift but forfeits shutdown control, while ADR4533BKSZ-REEL7 delivers superior accuracy at the expense of 5× higher quiescent current and incompatible footprint - making REF4132A33DBVR the optimal balance of precision, power efficiency, and SOT-23 compatibility.
Availability
REF4132A33DBVR is available at Aetrix Electronics and suitable for portable battery test equipment, industrial PLC analog I/O modules, and field transmitters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for REF4132A33DBVR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs since 1951.
The REF4132A33DBVR belongs to TI's high-precision voltage reference product line, designed specifically for data acquisition, industrial automation, and portable instrumentation where low drift, low noise, and small-footprint power efficiency are mandatory.
FAQ
What is the maximum load current supported by the REF4132A33DBVR?
The REF4132A33DBVR supports ±10 mA output current - meaning it can both source and sink up to 10 mA while maintaining specified accuracy and stability. At 10 mA load, dropout voltage rises to 500 mV, requiring minimum input voltage of 3.8 V. Short-circuit current is internally limited to 18 mA for protection.
Does the REF4132A33DBVR require external capacitors, and if so, what values are recommended?
Yes - the REF4132A33DBVR requires a 0.1 µF ceramic capacitor directly at the VIN pin and a minimum 0.1 µF ceramic capacitor at the VREF pin for stability. An additional 1–10 µF bulk capacitor may be added in parallel at VREF to improve transient response, though this increases turn-on time. X5R or X7R dielectrics are recommended for full temperature range performance.
How does the enable (EN) pin function on the REF4132A33DBVR?
The EN pin on the REF4132A33DBVR controls active/shutdown modes: voltage ≥1.6 V enables normal operation; voltage ≤0.5 V places the device in shutdown, reducing quiescent current to 2.5 µA and placing VREF in high-impedance state. Voltages between 0.5 V and 1.6 V must be avoided to prevent excessive current draw and unreliable startup behavior.
What is the long-term stability specification for the REF4132A33DBVR, and how is it measured?
The REF4132A33DBVR exhibits 30 ppm typical long-term stability over 1000 hours at 35°C, measured per JEDEC JESD22-A117. This value reflects average drift observed across 32 units under controlled burn-in conditions. While not guaranteed, it provides a realistic expectation for calibration interval planning in test and measurement equipment where drift impacts measurement traceability.
Can the REF4132A33DBVR be used to generate a negative reference voltage?
Yes - the REF4132A33DBVR can be combined with an op-amp such as the OPA735 to create a precision dual-supply reference (e.g., ±3.3 V) from a single 5 V rail. The low drift and low noise of the REF4132A33DBVR complement the zero-drift performance of the OPA735, enabling accurate bipolar signal conditioning in applications like motor drive current sensing and audio codec biasing.
REF4132A33DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 12ppm/°C
- Noise - 0.1Hz to 10Hz:
- 15ppmp-p
- Noise - 10Hz to 10kHz:
- 24µVrms
- Voltage - Input:
- 3.8V ~ 5.5V
- Current - Supply:
- 100µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
REF4132A33DBVR FAQ
1.How can I place an order for REF4132A33DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for REF4132A33DBVR 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 REF4132A33DBVR reliable?
The price and inventory of REF4132A33DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF4132A33DBVR is usually 5 days.
3.What payment methods are accepted for REF4132A33DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF4132A33DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REF4132A33DBVR?
REF4132A33DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REF4132A33DBVR 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 REF4132A33DBVR?
For technical support, including REF4132A33DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF4132A33DBVR requirements.
6.How does Aetrix verify that REF4132A33DBVR is sourced from the original manufacturer or authorized distributors?
All REF4132A33DBVR 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 REF4132A33DBVR meets industry standards.
7.What is the process for return or replacement of REF4132A33DBVR?
All REF4132A33DBVR units undergo pre-shipment inspection (PSI). If there is an issue with REF4132A33DBVR, 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 REF4132A33DBVR part is unused and in its original packaging.
Return procedure for REF4132A33DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REF4132A33DBVR Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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