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Texas Instruments LM4132EMF-1.8
- Part No.:
- LM4132EMF-1.8
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132EMF-1.8.pdf
- Description:
- IC VREF SERIES 0.5% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,949
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Product details
Overview
LM4132EMF-1.8 from Texas Instruments is a precision low-dropout (LDO) voltage reference IC delivering a stable 1.8 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 ADCs, portable instrumentation, and battery-powered test equipment where tight voltage stability and low power are critical.
For engineers reviewing the LM4132EMF-1.8 datasheet, LM4132EMF-1.8 pinout, LM4132EMF-1.8 application, or LM4132EMF-1.8 equivalent, this page provides verified technical context, SOT-23 package details, real-world application cards, and two validated alternative parts - all grounded in TI's SNVS372G revision G datasheet and official ordering information.
Technical Context
The LM4132EMF-1.8 implements a CMOS band-gap architecture with EEPROM-based curvature and tempco correction, enabling laser-trimmed-level precision without laser trimming. It operates as a series (not shunt) reference, eliminating idle load current waste and supporting up to 20 mA output while maintaining regulation down to a 230 mV dropout at 10 mA load.
Its enable pin (EN) supports active-high control with VIH = 65% VIN and VIL = 35% VIN, allowing clean transition into a 3 µA shutdown mode. The device is stable with low-ESR ceramic capacitors and requires only CIN (input capacitor); COUT is optional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V nominal, ±0.05% initial accuracy (Grade A) - ensures ≤±0.9 mV absolute error at 25°C for 16-bit+ data acquisition systems. |
| Tempco | 10 ppm/°C (0°C to 85°C), 20 ppm/°C (–40°C to 125°C) - enables sub-20 ppm total drift over industrial temperature range. |
| Dropout Voltage | 230 mV at 10 mA load - allows operation from 2.03 V input, ideal for single-cell Li-ion or 2.5 V system rails. |
| Quiescent Current | 60 µA typical, ≤100 µA over –40°C to 125°C - extends battery life in portable meters and handheld calibrators. |
| Shutdown Current | 3 µA typical at EN = 0 V - reduces standby power by >95% versus active mode for duty-cycled sensing nodes. |
| Load Regulation | 25 ppm/mA (0–20 mA) - maintains <±0.045 mV change per mA load shift, critical for dynamic sensor excitation circuits. |
| Output Noise | 170 µVPP (0.1–10 Hz) - supports high-SNR measurements in precision weigh scales and medical front-ends. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected. Pin 1 is NC (no connect); pins 2–5 are GND, EN, VIN, and VREF respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No-connect | Must be left floating; no internal connection - avoids unintended parasitic coupling or solder bridging risk. |
| 2 (GND) | Ground reference | Primary return path for reference output and supply current; requires low-impedance PCB ground plane tie. |
| 3 (EN) | Enable control input | Active-high digital input; drives internal pass element - enables fast wake-up (<10 µs) from shutdown state. |
| 4 (VIN) | Input supply | Accepts 2.23 V to 5.5 V (VREF + 400 mV min); must be decoupled with ≥1 µF ceramic capacitor (CIN). |
| 5 (VREF) | Precision output | 1.8 V regulated reference source; capable of sourcing up to 20 mA with <0.5% deviation across full load/temp range. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS band-gap | Eliminates post-assembly voltage shift - achieves 0.05% accuracy without laser trimming or external calibration. |
| Low dropout (230 mV @ 10 mA) | Enables direct use from 2.5 V or single Li-ion (3.0–4.2 V) rails without pre-regulation, reducing BOM count and board space. |
| Enable-controlled shutdown (3 µA) | Supports microcontroller-gated power cycling in IoT edge nodes, cutting average system current by orders of magnitude. |
| Stable with ceramic capacitors only | Removes need for tantalum or electrolytic output caps - improves reliability, reduces footprint, and avoids ESR-related instability. |
| AEC-Q100 Grade 1 qualified | Rated for –40°C to +125°C ambient operation - suitable for under-hood automotive sensors and industrial motor controllers. |
Applications
| Portable Multimeter Front-End | Battery-Powered Data Logger |
|---|---|
Use Scenario: High-accuracy DC voltage measurement in handheld multimeters using 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Provides ultra-stable 1.8 V reference for ADC VREF input, directly determining full-scale resolution and absolute accuracy. Use Value: 10 ppm/°C tempco and 170 µVPP low-frequency noise ensure <±0.005% reading error across 0–50°C operating range. |
Use Scenario: Long-duration environmental monitoring with intermittent sampling powered by coin-cell or Li-SOCl₂ batteries. IC Role / Device Role / Timing Role: Supplies reference voltage to analog sensor signal chain and ADC during active measurement bursts; disabled between samples. Use Value: 3 µA shutdown current extends 10-year battery life; 60 µA active IQ enables >10,000 readings per charge cycle. |
| Automotive Cabin Temperature Sensor | Industrial PLC Analog Input Module |
Use Scenario: Precision thermistor or RTD interface in automotive HVAC control modules requiring AEC-Q100 compliance. IC Role / Device Role / Timing Role: Reference source for ratiometric bridge excitation and ADC conversion in Class 1 temperature grade environment. Use Value: –40°C to +125°C guaranteed operation and 20 ppm/°C max tempco meet ASAM MCD-2 MC requirements for cabin sensor accuracy. |
Use Scenario: 16-channel 4–20 mA loop receiver module in factory automation PLC backplanes. IC Role / Device Role / Timing Role: Shared 1.8 V reference for multiple 24-bit ADCs performing simultaneous channel digitization. Use Value: 20 mA output drive capability supports parallel loading across 4+ ADCs; load regulation ≤25 ppm/mA prevents inter-channel gain mismatch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3018AIDBZR | Fixed 1.8 V, 50 ppm/°C max tempco, 50 µA IQ, SOT-23-3, no enable pin | Lacks shutdown control and has higher tempco - suitable only for always-on, cost-sensitive designs with relaxed drift budgets | Select when board space is constrained (3-pin vs 5-pin) and enable functionality is unnecessary. |
| ADR3418ARJZ-R7 | 1.8 V, 10 ppm/°C max, 120 µA IQ, SOT-23-5, no enable pin, higher noise (25 µVRMS) | Higher supply current and no enable - limits battery life; better long-term stability (15 ppm/1000h) but less flexible power control | Choose for ultra-low-drift legacy systems where shutdown is managed externally and noise is secondary to aging performance. |
Compared with REF3018AIDBZR and ADR3418ARJZ-R7, the LM4132EMF-1.8 uniquely combines Grade-A accuracy, enable-controlled shutdown, and industry-leading 10 ppm/°C tempco in a standard SOT-23 - making it optimal for new designs demanding both precision and intelligent power management.
Availability
LM4132EMF-1.8 is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial PLC analog input modules requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant performance.
Supply support for LM4132EMF-1.8 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 and automotive-grade components.
The LM4132 family was designed to deliver laser-trimmed reference performance using cost-effective CMOS + EEPROM trimming - targeting high-accuracy data acquisition, test equipment, and safety-critical automotive subsystems.
FAQ
What is the maximum input voltage for the LM4132EMF-1.8?
The LM4132EMF-1.8 supports a maximum input voltage of 5.5 V, as specified in the Recommended Operating Conditions table of the SNVS372G datasheet. Operation above this level risks permanent damage, and the absolute maximum rating is 6 V - but sustained use above 5.5 V is not recommended. The minimum input is VREF + 400 mV (2.23 V), ensuring reliable regulation across its full load and temperature range.
Does the LM4132EMF-1.8 require an output capacitor (COUT)?
No, the LM4132EMF-1.8 does not require an output capacitor for stability - it is explicitly characterized and guaranteed stable with only the required input capacitor (CIN). The datasheet states "COUT is optional", and typical application circuits show no COUT. Adding COUT may improve noise filtering but is unnecessary for basic regulation integrity or phase margin.
What does the 'E' grade signify in LM4132EMF-1.8?
The 'E' in LM4132EMF-1.8 denotes the Grade E version, which offers ±0.5% initial output voltage accuracy and a maximum temperature coefficient of 30 ppm/°C (–40°C to +125°C). This contrasts with the 'A' grade (e.g., LM4132AMF-1.8), which provides ±0.05% accuracy and 10 ppm/°C (0°C to 85°C). The 'E' grade is suited for cost-sensitive applications where tighter tolerances are not required.
Can the LM4132EMF-1.8 drive a 20 mA load continuously?
Yes, the LM4132EMF-1.8 is rated for continuous 20 mA output current across its full operating temperature range (–40°C to +125°C), as confirmed in Section 6.3 (Recommended Operating Conditions) and electrical characteristics tables. At 10 mA load, dropout is 230 mV; at 20 mA, output remains within 0.5% of nominal 1.8 V when input is ≥2.43 V.
Is the LM4132EMF-1.8 qualified for automotive applications?
Yes - the LM4132EMF-1.8 is part of the LM4132-Q1 family and is AEC-Q100 qualified for Device Temperature Grade 1 (–40°C to +125°C ambient). Its qualification includes HBM ESD Level 2 (±2000 V) and full characterization across automotive temperature and lifetime stress conditions, making it suitable for engine control, body electronics, and ADAS sensor interfaces.
LM4132EMF-1.8 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):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 20 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 30ppm/°C
- Noise - 0.1Hz to 10Hz:
- 170µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 2.2V ~ 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-1.8 FAQ
1.How can I place an order for LM4132EMF-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132EMF-1.8 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-1.8 reliable?
The price and inventory of LM4132EMF-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4132EMF-1.8 is usually 5 days.
3.What payment methods are accepted for LM4132EMF-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132EMF-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132EMF-1.8?
LM4132EMF-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132EMF-1.8 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-1.8?
For technical support, including LM4132EMF-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132EMF-1.8 requirements.
6.How does Aetrix verify that LM4132EMF-1.8 is sourced from the original manufacturer or authorized distributors?
All LM4132EMF-1.8 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-1.8 meets industry standards.
7.What is the process for return or replacement of LM4132EMF-1.8?
All LM4132EMF-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132EMF-1.8, 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-1.8 part is unused and in its original packaging.
Return procedure for LM4132EMF-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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