Texas Instruments LM4132DMF-4.1/NOPB

Overview

LM4132DMF-4.1/NOPB from Texas Instruments is a precision low-dropout (LDO) series voltage reference IC delivering a stable 4.096 V output with 0.05% initial accuracy, 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 automotive sensor signal conditioning.

For engineers reviewing the LM4132DMF-4.1/NOPB datasheet, LM4132DMF-4.1/NOPB pinout, LM4132DMF-4.1/NOPB application, or LM4132DMF-4.1/NOPB equivalent, key selection criteria include dropout voltage (175 mV at 10 mA), enable-controlled shutdown (3 µA), load regulation (25 ppm/mA), and SOT-23-5 compatibility with ceramic capacitors only.

Technical Context

The LM4132DMF-4.1/NOPB 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 reference with internal error amplifier and pass element, supporting up to 20 mA output current without requiring an output capacitor.

Its enable pin provides digital control of output state, with VIH = 65% VIN and VIL = 35% VIN thresholds, and it achieves stable operation with low-ESR ceramic input capacitors (CIN required, COUT optional). The device is qualified per AEC-Q100 Grade 1 (–40°C to +125°C).

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with REF3340AIDBVR and ADR3440ARJZ-R7, the LM4132DMF-4.1/NOPB uniquely combines Grade A accuracy (0.05%), enable functionality, and 60 µA IQ in a single SOT-23-5 package - making it optimal for battery-constrained, high-accuracy systems requiring active power management.

Availability

LM4132DMF-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, automotive cabin sensors, and industrial PLC analog inputs requiring stable component supply with guaranteed long-term availability.

Supply support for LM4132DMF-4.1/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 ICs and automotive-grade components.

The LM4132 family was designed for high-accuracy, low-power reference applications in space-constrained systems - targeting instrumentation, data acquisition, and automotive subsystems where laser-trimmed performance is needed at CMOS cost.

FAQ

What is the maximum load current supported by the LM4132DMF-4.1/NOPB?

The LM4132DMF-4.1/NOPB delivers up to 20 mA of output current while maintaining specified accuracy and regulation. This capability eliminates the need for external buffer amplifiers in most 12- to 16-bit data acquisition designs. At 20 mA load, dropout remains within specification (≤400 mV), and load regulation is limited to 25 ppm/mA - ensuring stable 4.096 V output across its full operating range.

Does the LM4132DMF-4.1/NOPB require an output capacitor for stability?

No, the LM4132DMF-4.1/NOPB is internally compensated and stable with no output capacitor required. A ceramic input capacitor (CIN) is mandatory for noise suppression and transient response, while the output capacitor (COUT) is optional and may be added only if additional high-frequency filtering is needed. This simplifies layout and reduces bill-of-materials cost compared to references requiring minimum ESR or specific capacitor types.

What is the minimum input voltage required for the LM4132DMF-4.1/NOPB to maintain regulation?

The LM4132DMF-4.1/NOPB requires a minimum input voltage of VREF + 400 mV, i.e., 4.496 V, to maintain regulation at 10 mA load. At lighter loads, dropout decreases - e.g., 175 mV at 10 mA - but the 400 mV worst-case dropout applies across –40°C to +125°C. Operation below this threshold causes output voltage collapse and loss of reference accuracy.

Is the LM4132DMF-4.1/NOPB qualified for automotive applications?

Yes, the LM4132DMF-4.1/NOPB is AEC-Q100 qualified (Grade 1), rated for ambient temperatures from –40°C to +125°C and tested for HBM ESD robustness (±2 kV). While the standard LM4132 series is automotive-capable, note that the LM4132-Q1 variant carries additional automotive-specific test documentation - however, the LM4132DMF-4.1/NOPB itself meets all Grade 1 stress and reliability requirements for under-hood and cabin applications.

How does the enable pin on the LM4132DMF-4.1/NOPB function?

The enable pin (EN, Pin 3) on the LM4132DMF-4.1/NOPB is an active-high digital control input. When pulled ≥65% of VIN, the device operates normally; when ≤35% of VIN, it enters shutdown mode drawing only 3 µA. The pin includes built-in hysteresis (~100 mV typical) to prevent chatter during slow-rising enable signals. No external pull-up or pull-down is required - the pin is CMOS-compatible and high-impedance.