Texas Instruments LM4132DMF-1.8/NOPB

Overview

LM4132DMF-1.8/NOPB from Texas Instruments is a precision low-dropout (LDO) series 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 operates from VIN = VREF + 400 mV to 5.5 V, supports up to 20 mA load, and features an enable pin for 3 µA shutdown - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.

For engineers reviewing the LM4132DMF-1.8/NOPB datasheet, LM4132DMF-1.8/NOPB pinout, LM4132DMF-1.8/NOPB application, or LM4132DMF-1.8/NOPB equivalent, key selection criteria include dropout voltage ≤400 mV at 10 mA, thermal hysteresis ≤75 ppm, long-term stability ≤50 ppm over 1000 hrs, and compatibility with low-ESR ceramic capacitors without requiring an output buffer.

Technical Context

The LM4132DMF-1.8/NOPB uses EEPROM-trimmed CMOS band-gap architecture to achieve laser-trimmed bipolar-level precision at lower cost. Its curvature, tempco, and accuracy are corrected at package level to mitigate assembly-induced shifts - a critical advantage over die-level trimmed references in plastic SOT-23 packaging.

This device functions as a three-terminal series reference with active enable control, delivering regulated 1.8 V output without mandatory output capacitance. Its 230 mV typical dropout at 10 mA and 170 µV_PP (0.1–10 Hz) noise support high-resolution data acquisition where supply headroom and signal integrity are constrained.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Compared with ADR3418ARJZ-R7 and REF3318AIDBVR, LM4132DMF-1.8/NOPB uniquely combines A-grade 0.05% accuracy, 10 ppm/°C tempco, enable-controlled 3 µA shutdown, and 230 mV dropout - making it the only option meeting all four requirements simultaneously for high-end portable instrumentation.

Availability

LM4132DMF-1.8/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, industrial process controllers, and medical patient monitoring devices requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4132DMF-1.8/NOPB 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 and embedded processing technologies, with decades of expertise in precision analog ICs and automotive-qualified components.

The LM4132 family was designed to deliver laser-trimmed reference performance in cost-effective CMOS technology for space-constrained, battery-powered, and safety-critical systems - targeting instrumentation, automotive, and industrial markets.

FAQ

What is the minimum input voltage required for stable operation of LM4132DMF-1.8/NOPB?

The LM4132DMF-1.8/NOPB requires VIN ≥ VREF + 400 mV, i.e., ≥2.2 V, for full specification compliance. At 10 mA load, its typical dropout is 230 mV, so 2.03 V input sustains regulation - but 2.2 V is recommended for guaranteed 0.5% accuracy across temperature and load. Below 2.2 V, output may deviate beyond datasheet limits.

Does LM4132DMF-1.8/NOPB require an output capacitor for stability?

No, LM4132DMF-1.8/NOPB is stable without an output capacitor and does not require a buffer amplifier. A 0.1 µF ceramic capacitor on VREF is optional and improves PSRR above 10 kHz; omitting it reduces board area and cost while maintaining DC and low-frequency accuracy per datasheet specifications.

What is the maximum load current supported by LM4132DMF-1.8/NOPB?

LM4132DMF-1.8/NOPB delivers up to 20 mA continuous output current while maintaining specified accuracy, line/load regulation, and thermal performance. Exceeding 20 mA risks exceeding junction temperature limits and violating the 0.5% output accuracy guarantee - especially at elevated ambient temperatures.

How does the enable pin (EN) function on LM4132DMF-1.8/NOPB?

The EN pin on LM4132DMF-1.8/NOPB is active-high: applying ≥65% of VIN enables the reference output; applying ≤35% of VIN places LM4132DMF-1.8/NOPB in shutdown mode with 3 µA max supply current. No external pull-up/down is required - internal logic ensures clean state transitions without glitches.

Is LM4132DMF-1.8/NOPB qualified for automotive applications?

Yes, LM4132DMF-1.8/NOPB 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 engine bay and cabin modules, including thermal hysteresis ≤75 ppm and long-term stability ≤50 ppm over 1000 hours - verified per TI's automotive qualification protocol.