Texas Instruments LM4132EMF-1.8/NOPB

Overview

LM4132EMF-1.8/NOPB 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 from VIN = VREF + 400 mV to 5.5 V - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.

For engineers reviewing the LM4132EMF-1.8/NOPB datasheet, LM4132EMF-1.8/NOPB pinout, LM4132EMF-1.8/NOPB application, or LM4132EMF-1.8/NOPB equivalent, key selection criteria include dropout voltage (230 mV @ 10 mA), long-term stability (50 ppm over 1000 hrs), thermal hysteresis (75 ppm), line regulation (30 ppm/V), and SOT-23-5 package compatibility with low-ESR ceramic capacitors.

Technical Context

The LM4132EMF-1.8/NOPB uses EEPROM-trimmed CMOS band-gap architecture to correct curvature, tempco, and accuracy at package level - overcoming assembly-induced shifts that limit laser-trimmed bipolar references. Its internal LDO regulator eliminates need for output buffer or mandatory COUT, unlike shunt references.

It implements a dedicated enable input (EN) with VIH = 65% VIN and VIL = 35% VIN, supporting controlled power sequencing. The device maintains 0.5% output accuracy down to 230 mV dropout at 10 mA load and exhibits 170 µVPP (0.1–10 Hz) output noise - critical for high-resolution data acquisition systems.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads. RoHS-compliant, lead-free (NOPB suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM4132EMF-1.8/NOPB, REF3018AIDBZR saves one pin but sacrifices programmable power control, while ADR3418ARJZ-R7 trades 2× higher supply current for marginally lower noise - making LM4132EMF-1.8/NOPB optimal for battery-powered, enable-gated precision systems.

Availability

LM4132EMF-1.8/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor modules, industrial process controllers, and medical patient monitors requiring stable component supply with guaranteed long-term availability.

Supply support for LM4132EMF-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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and signal chain solutions.

The LM4132 family was designed to deliver laser-trimmed reference performance using cost-effective, EEPROM-programmable CMOS technology - targeting high-accuracy data acquisition, test equipment, and automotive sensing applications.

FAQ

What is the minimum input voltage required for stable operation of the LM4132EMF-1.8/NOPB?

The LM4132EMF-1.8/NOPB requires VIN ≥ VREF + 400 mV for guaranteed specification compliance across temperature and load. At 10 mA load and 25°C, the measured dropout is 230 mV, allowing operation down to 2.03 V input while maintaining 0.5% output accuracy. Below this, output regulation degrades progressively.

Does the LM4132EMF-1.8/NOPB require an output capacitor for stability?

No, the LM4132EMF-1.8/NOPB is internally compensated and stable without an output capacitor. However, adding a 1 µF low-ESR ceramic capacitor at VREF improves transient response and reduces high-frequency noise. The datasheet explicitly states COUT is optional - unlike many LDOs that mandate it.

How does the enable pin (EN) function on the LM4132EMF-1.8/NOPB?

The EN pin is active-high: driving EN ≥ 65% of VIN enables the reference output; pulling EN ≤ 35% of VIN places LM4132EMF-1.8/NOPB into shutdown mode with 3 µA supply current. Hysteresis between VIH and VIL prevents chatter near threshold. No external pull-up is required - internal biasing ensures defined state at power-up.

Is the LM4132EMF-1.8/NOPB suitable for automotive applications?

Yes - the LM4132EMF-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 and thermal stress requirements for under-hood and cabin sensor modules, though system-level ASIL certification remains the responsibility of the end application designer.

What is the long-term stability specification for the LM4132EMF-1.8/NOPB?

The LM4132EMF-1.8/NOPB exhibits 50 ppm maximum long-term stability after 1000 hours of operation at 25°C. This value reflects typical drift in output voltage due to aging effects and is measured under controlled conditions - critical for calibration-critical instruments where recalibration intervals exceed one year.