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Texas Instruments LM4132EMF-2.5
- Part No.:
- LM4132EMF-2.5
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132EMF-2.5.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,661
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Product details
Overview
LM4132EMF-2.5 from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering a stable 2.5 V output with ±0.05% initial accuracy (Grade A), 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current - used in high-resolution ADC/DAC biasing, portable instrumentation, and battery-powered test equipment where tight voltage stability and low power are critical.
For engineers reviewing the LM4132EMF-2.5 datasheet, LM4132EMF-2.5 pinout, LM4132EMF-2.5 application, or LM4132EMF-2.5 equivalent, key selection considerations include dropout voltage (175 mV at 10 mA), enable-controlled shutdown (3 µA), load regulation (25 ppm/mA), noise performance (240 µVPP, 0.1–10 Hz), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4132EMF-2.5 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level accuracy without laser trimming, correcting curvature, tempco, and initial offset at package level to overcome plastic-package assembly shifts. It operates as a series (not shunt) reference, eliminating idle current waste under no-load conditions.
It features an active-high enable pin (VIH = 65% VIN, VIL = 35% VIN), supports input voltages from VREF + 400 mV (2.675 V min) to 5.5 V, delivers up to 20 mA output current without requiring an output capacitor, and maintains stability with low-ESR ceramic capacitors on input only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±0.05% (Grade A, 25°C); enables 16-bit ADC reference with ≤0.8 LSB error at full scale |
| Tempco | 10 ppm/°C (0°C to 85°C); ensures ≤25 ppm drift over industrial range, critical for temperature-varying sensor front-ends |
| Dropout Voltage | 175 mV at 10 mA load; allows operation from 2.675 V input, supporting single-cell Li-ion or 3.3 V rail with margin |
| Quiescent Current | 60 µA (active), 3 µA (shutdown); extends battery life in portable data loggers beyond 10 years at 10 µA avg system draw |
| Output Noise | 240 µVPP (0.1–10 Hz); meets <300 µVPP requirement for 14-bit precision measurement systems |
| Load Regulation | 25 ppm/mA; introduces <±50 ppm error across 0–20 mA load, suitable for driving ADC reference inputs and op-amp bias networks |
| Line Regulation | 50 ppm/V; contributes <±200 ppm error over 2.675–5.5 V input range, manageable with pre-regulation or filtering |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, 1.0 mm max height; thermally enhanced for 164.1°C/W junction-to-ambient dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must remain unconnected; floating; no internal connection or function |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal circuitry; requires low-impedance PCB tie to system AGND |
| 3 - EN | Enable control input | Active-high logic input; drives device into 3 µA shutdown when pulled low below 35% VIN |
| 4 - VIN | Input supply | Accepts 2.675–5.5 V; supplies internal regulator and reference core; requires ≥1 µF ceramic CIN |
| 5 - VREF | Precision reference output | 2.5 V source capable of sourcing/sinking ±20 mA; no COUT required for stability |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-based curvature correction | Compensates die-to-package shift post-assembly, enabling 0.05% accuracy in cost-effective plastic SOT-23 |
| Enable pin with defined thresholds | VIH = 65% VIN, VIL = 35% VIN - eliminates need for external level-shifting in 3.3 V or 5 V systems |
| No output capacitor required | Stable with only input capacitor; reduces BOM count and board area vs. traditional references needing COUT |
| 20 mA output drive capability | Directly powers ADC reference inputs, DAC buffers, or small op-amp stages without external pass transistor |
| Low-noise 0.1–10 Hz band | 240 µVPP - supports high-resolution DC measurements without additional noise filtering |
Applications
| Portable Data Acquisition | Automotive Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered handheld multimeter acquiring 16-bit voltage readings over –20°C to 60°C ambient. IC Role / Device Role / Timing Role: Primary 2.5 V reference for SAR ADC and analog front-end gain calibration. Use Value: 10 ppm/°C tempco and 0.05% accuracy ensure <±0.02% full-scale error across temperature; 60 µA IQ extends 2000-mAh battery life to >5 years. |
Use Scenario: Engine control unit measuring exhaust gas oxygen (EGO) sensor output with cold-start compensation. IC Role / Device Role / Timing Role: Stable bias reference for programmable gain amplifier and ratiometric ADC scaling. Use Value: AEC-Q100 Grade 1 qualification (–40°C to +125°C) and 20 ppm/°C max tempco over full range guarantee consistent sensor linearity during thermal transients. |
| Industrial Process Controller | Medical Patient Monitor Analog Front-End |
|
Use Scenario: DIN-rail PLC module converting 4–20 mA loop signals to digital with 0.1% total uncertainty budget. IC Role / Device Role / Timing Role: Precision reference for dual-slope integrator and isolated sigma-delta ADC. Use Value: 240 µVPP low-frequency noise and 25 ppm/mA load regulation prevent reference-induced drift in long-integration measurements. |
Use Scenario: Portable ECG device digitizing microvolt-level cardiac signals with 12-bit resolution and 100 dB SNR target. IC Role / Device Role / Timing Role: Low-noise, low-drift reference for instrumentation amplifier common-mode setting and ADC reference. Use Value: 3 µA shutdown mode enables rapid power gating between patient leads; 175 mV dropout supports operation from regulated 3.0 V rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | Fixed 2.5 V, 50 ppm/°C max tempco, 50 µA IQ, SOT-23-3, no enable pin | Lacks shutdown control and has higher tempco; suited for always-on, ultra-low-power nodes where enable is unnecessary | Select REF3025AIDBZR if board space is constrained (3-pin vs 5-pin) and shutdown functionality is not required |
| ADR3425ARJZ-R7 | 2.5 V, 10 ppm/°C max, 120 µA IQ, SOT-23-5, no enable, higher noise (31 µVRMS) | Higher supply current and no enable limit use in battery-critical designs; better long-term stability (15 ppm/1000 hrs) | Select ADR3425ARJZ-R7 when long-term drift dominates design requirements and system can tolerate 120 µA active current |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, the LM4132EMF-2.5 uniquely combines enable control, lowest tempco among SOT-23-5 references, and capacitor-free stability - making it optimal for portable, temperature-variable, and power-gated precision systems.
Availability
LM4132EMF-2.5 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, and industrial process controllers requiring stable component supply with guaranteed long-term availability and traceable lot-level documentation.
Supply support for LM4132EMF-2.5 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 connectivity technologies, with decades of expertise in precision analog signal chains.
The LM4132 family was designed to deliver laser-trimmed reference accuracy using cost-effective CMOS+EEPROM trimming - targeting high-reliability, space-constrained applications in test equipment, medical devices, and automotive electronics.
FAQ
What is the maximum input voltage for the LM4132EMF-2.5?
The LM4132EMF-2.5 supports a maximum input voltage of 5.5 V, with minimum input defined as VREF + 400 mV (2.675 V). Operation above 5.5 V risks permanent damage per absolute maximum ratings; derating is recommended above 125°C ambient due to thermal limits.
Does the LM4132EMF-2.5 require an output capacitor for stability?
No, the LM4132EMF-2.5 is internally compensated and stable without an output capacitor. Only an input capacitor (≥1 µF ceramic, low-ESR) is required. Adding COUT may improve PSRR but is not necessary for basic stability or regulation performance.
What does the 'E' grade signify in LM4132EMF-2.5?
The 'E' in LM4132EMF-2.5 denotes Grade E accuracy: ±0.5% initial output tolerance and 30 ppm/°C max temperature coefficient over –40°C to +125°C. This contrasts with Grade A (±0.05%, 10 ppm/°C), offering cost-optimized performance for less demanding applications.
Can the LM4132EMF-2.5 drive a 20 mA load continuously?
Yes, the LM4132EMF-2.5 is rated for continuous 20 mA output current at TJ ≤ 125°C. At 20 mA and 25°C ambient, power dissipation is ~35 mW; thermal design must ensure junction temperature remains within spec using the SOT-23-5 RθJA of 164.1°C/W.
Is the LM4132EMF-2.5 qualified for automotive applications?
No - only the LM4132-Q1 variants (e.g., LM4132Q1EMF-2.5) are AEC-Q100 qualified. The LM4132EMF-2.5 is for industrial and commercial use; it shares the same electrical specs but lacks automotive-grade screening, qualification testing, and extended temperature validation.
LM4132EMF-2.5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- 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:
- ±0.5%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 240µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.9V ~ 5.5V
- Current - Supply:
- 100µA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM4132EMF-2.5 FAQ
1.How can I place an order for LM4132EMF-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132EMF-2.5 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 LM4132EMF-2.5 reliable?
The price and inventory of LM4132EMF-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132EMF-2.5 is usually 5 days.
3.What payment methods are accepted for LM4132EMF-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132EMF-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132EMF-2.5?
LM4132EMF-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132EMF-2.5 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 LM4132EMF-2.5?
For technical support, including LM4132EMF-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132EMF-2.5 requirements.
6.How does Aetrix verify that LM4132EMF-2.5 is sourced from the original manufacturer or authorized distributors?
All LM4132EMF-2.5 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 LM4132EMF-2.5 meets industry standards.
7.What is the process for return or replacement of LM4132EMF-2.5?
All LM4132EMF-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132EMF-2.5, 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 LM4132EMF-2.5 part is unused and in its original packaging.
Return procedure for LM4132EMF-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132EMF-2.5 Tags
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