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Texas Instruments LM4132DMFX-1.8
- Part No.:
- LM4132DMFX-1.8
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM4132DMFX-1.8.pdf
- Description:
- IC VREF SERIES 0.4% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,400
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Product details
Overview
LM4132DMFX-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 (A-grade), 10 ppm/°C temperature coefficient (0°C to 85°C), and 60 µA quiescent current. It features an enable pin for 3 µA shutdown mode, supports up to 20 mA load current, and operates with input voltages as low as VREF + 400 mV - making it ideal for battery-powered instrumentation and high-accuracy ADC/DAC biasing.
For engineers reviewing the LM4132DMFX-1.8 datasheet, LM4132DMFX-1.8 pinout, LM4132DMFX-1.8 application, or LM4132DMFX-1.8 equivalent, key selection criteria include dropout voltage at 10 mA (230 mV typ), line regulation (30 ppm/V), load regulation (25 ppm/mA), thermal hysteresis (75 ppm), and compatibility with low-ESR ceramic capacitors without requiring an output buffer.
Technical Context
The LM4132DMFX-1.8 uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision while overcoming plastic-package assembly shifts. Its curvature, tempco, and accuracy are corrected at package level - enabling tighter tolerances than conventional trimming methods.
Unlike shunt references, it draws only 60 µA supply current under no-load conditions and delivers full 20 mA output without external buffering. The enable pin provides precise system-level power sequencing control, and its SOT-23-5 package supports space-constrained PCB layouts in portable and automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±0.05% (A-grade), stable across –40°C to +125°C ambient |
| Tempco | 10 ppm/°C (0°C to 85°C), 20 ppm/°C (–40°C to +125°C) - enables <±0.5 mV drift over full industrial range |
| Dropout Voltage | 230 mV typical at 10 mA load - allows operation from 2.03 V input, critical for single-cell Li-ion or coin-cell systems |
| Supply Current | 60 µA typical (100 µA max over temp) - minimizes standby power in always-on sensor nodes |
| Shutdown Current | 3 µA typical when EN = 0 V - enables ultra-low-power sleep modes in portable equipment |
| Line Regulation | 30 ppm/V (VREF + 400 mV to 5.5 V) - ensures <0.054 mV output change per volt input variation |
| Load Regulation | 25 ppm/mA (0–20 mA) - maintains <0.045 mV stability across full load range |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, surface-mount, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N/C | No-connect terminal | Must be left floating; not internally bonded - avoids unintended parasitic paths |
| 2 - GND | Analog ground reference | Primary return path for reference output and internal band-gap circuitry; requires low-impedance PCB connection |
| 3 - EN | Digital enable input | Active-high logic control: VIH ≥ 65% VIN, VIL ≤ 35% VIN - enables seamless integration with microcontroller GPIO |
| 4 - VIN | Input supply rail | Accepts 2.23 V to 5.5 V; minimum headroom = 400 mV above VREF for regulation |
| 5 - VREF | Precision output terminal | Delivers regulated 1.8 V; stable with 1 µF ceramic capacitor on CIN (required); COUT optional |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM-trimmed CMOS band-gap | Enables factory calibration of curvature, tempco, and accuracy post-assembly - eliminates package-induced drift |
| Enable-controlled shutdown | Reduces supply current to 3 µA, supporting low-power wake-up architectures in data loggers and IoT edge nodes |
| 20 mA output drive capability | Directly powers SAR ADC references, DAC buffers, or op-amp bias networks without external pass devices |
| Stable with low-ESR ceramics | Eliminates need for tantalum or electrolytic output capacitors - improves reliability and reduces board area |
| AEC-Q100 Grade 1 qualified | Rated for –40°C to +125°C ambient operation - suitable for under-hood automotive sensors and motor control feedback |
Applications
| Portable Precision Data Acquisition | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Handheld multimeter or portable ECG front-end acquiring sub-mV signals with 16-bit+ resolution. IC Role / Device Role / Timing Role: Provides ultra-stable 1.8 V reference for successive-approximation ADC and analog signal chain biasing. Use Value: 10 ppm/°C tempco and 75 ppm thermal hysteresis ensure measurement repeatability across field temperature swings without recalibration. |
Use Scenario: Wearable pulse oximeter operating from single CR2032 coin cell with multi-day runtime. IC Role / Device Role / Timing Role: Supplies low-noise 1.8 V reference to transimpedance amplifier and ADC, enabling accurate SpO₂ calculation. Use Value: 60 µA quiescent current and 3 µA shutdown mode extend battery life; 230 mV dropout permits operation down to 2.03 V input. |
| Automotive Cabin Temperature Sensor | Industrial PLC Analog Input Module |
Use Scenario: AEC-Q100-compliant cabin air temperature sensor in HVAC control unit. IC Role / Device Role / Timing Role: Delivers 1.8 V reference for thermistor-to-digital conversion circuitry in harsh automotive environments. Use Value: Grade 1 qualification (–40°C to +125°C) and 20 ppm/°C tempco over full range guarantee accuracy across vehicle lifecycle. |
Use Scenario: 4–20 mA loop-powered analog input card in factory automation PLC. IC Role / Device Role / Timing Role: Supplies precision reference for isolated ΣΔ ADC measuring RTD or thermocouple signals. Use Value: 0.05% initial accuracy and 50 ppm long-term stability (1000 hrs) reduce calibration frequency and maintenance cost. |
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 output, 50 ppm/°C max tempco, 50 µA IQ, no enable pin, SOT-23-3 | Lacks shutdown control and has higher tempco; suited for simpler, non-sequenced systems | Select when board space is extremely constrained and enable functionality is unnecessary |
| ADR3418ARJZ-R7 | 1.8 V output, 10 ppm/°C max tempco, 120 µA IQ, no enable, SOT-23-5 pinout differs (GND/OUT swapped) | Higher quiescent current and incompatible pinout require PCB redesign; no shutdown mode | Choose only if ADR34xx family ecosystem alignment outweighs layout impact and power penalty |
Compared with REF3018AIDBZR and ADR3418ARJZ-R7, the LM4132DMFX-1.8 uniquely combines ultra-low tempco, integrated enable, and SOT-23-5 pinout in a single AEC-Q100-qualified device - offering the only drop-in solution for automotive and portable designs requiring both precision and power-state control.
Availability
LM4132DMFX-1.8 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered medical sensors, automotive cabin sensing, and industrial PLC analog input modules requiring stable component supply with guaranteed long-term availability.
Supply support for LM4132DMFX-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 leader focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets with high-reliability components.
The LM4132 family was designed specifically for high-accuracy, low-power reference needs in space- and energy-constrained systems - bridging the performance gap between costly laser-trimmed references and standard band-gap ICs.
FAQ
What is the minimum input voltage required for stable operation of the LM4132DMFX-1.8?
The LM4132DMFX-1.8 requires a minimum input voltage of VREF + 400 mV, i.e., 2.23 V, to maintain regulation within 0.5% accuracy at 10 mA load. At lower inputs, output voltage drops nonlinearly; datasheet-specified dropout is 230 mV typical at 10 mA and 400 mV maximum over temperature. This enables reliable operation from partially discharged Li-ion or alkaline cells.
Does the LM4132DMFX-1.8 require an output capacitor for stability?
No, the LM4132DMFX-1.8 is internally compensated and stable with no output capacitor. A 1 µF ceramic capacitor on the input (CIN) is mandatory for noise rejection and transient response; COUT is optional and may be added only if improved PSRR or low-frequency noise suppression is needed. Unlike many references, it does not require a buffer amplifier or external compensation network.
How does the enable pin of the LM4132DMFX-1.8 function in system power sequencing?
The LM4132DMFX-1.8 enable pin is active-high with VIH ≥ 65% VIN and VIL ≤ 35% VIN, allowing direct interfacing with 1.8 V, 3.3 V, or 5 V logic. When disabled, it enters 3 µA shutdown mode - ideal for synchronizing reference activation with MCU wake-up or ADC initialization. The pin has no hysteresis, so clean digital edges are recommended to avoid metastability.
Is the LM4132DMFX-1.8 suitable for automotive applications?
Yes, the LM4132DMFX-1.8 is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), with HBM ESD rating of ±2000 V. It meets automotive reliability requirements for cabin and chassis applications - including temperature sensor modules, infotainment power supplies, and ADAS subsystem references - and is manufactured in TI's certified automotive production flow.
What grade (A–E) does the LM4132DMFX-1.8 correspond to, and how does that affect its specifications?
The LM4132DMFX-1.8 is the A-grade variant, specified for 0.05% initial output voltage accuracy and 10 ppm/°C temperature coefficient (0°C to 85°C). This grade delivers the highest precision in the LM4132 family and is validated across full temperature range with worst-case limits documented in Section 6.5 of the datasheet - ensuring design margin for metrology-grade applications.
LM4132DMFX-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:
- ±0.4%
- Temperature Coefficient:
- 20ppm/°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
LM4132DMFX-1.8 FAQ
1.How can I place an order for LM4132DMFX-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4132DMFX-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 LM4132DMFX-1.8 reliable?
The price and inventory of LM4132DMFX-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 LM4132DMFX-1.8 is usually 5 days.
3.What payment methods are accepted for LM4132DMFX-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4132DMFX-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4132DMFX-1.8?
LM4132DMFX-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4132DMFX-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 LM4132DMFX-1.8?
For technical support, including LM4132DMFX-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4132DMFX-1.8 requirements.
6.How does Aetrix verify that LM4132DMFX-1.8 is sourced from the original manufacturer or authorized distributors?
All LM4132DMFX-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 LM4132DMFX-1.8 meets industry standards.
7.What is the process for return or replacement of LM4132DMFX-1.8?
All LM4132DMFX-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with LM4132DMFX-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 LM4132DMFX-1.8 part is unused and in its original packaging.
Return procedure for LM4132DMFX-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4132DMFX-1.8 Tags
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