Texas Instruments LM4050CEM3-5.0/NOPB

Overview

LM4050CEM3-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.5% initial tolerance (C-grade), 50 ppm/°C max temperature coefficient, and 93 μV_rms wideband noise (10 Hz–10 kHz). It operates from 56 μA to 15 mA and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.

For engineers reviewing the LM4050CEM3-5.0/NOPB datasheet, LM4050CEM3-5.0/NOPB pinout, LM4050CEM3-5.0/NOPB application, or LM4050CEM3-5.0/NOPB equivalent, key selection criteria include guaranteed C-grade tolerance, no-output-capacitor operation, capacitive load stability, thermal hysteresis ≤1.4 mV, and compatibility with low-current precision analog signal chains.

Technical Context

The LM4050CEM3-5.0/NOPB uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.5 Ω at 1 mA (120 Hz), enabling stable regulation under varying load currents from 56 μA to 15 mA without external capacitance.

It achieves ±0.5% initial accuracy at 25°C and maintains ≤±42 mV total output variation over −40°C to +85°C (industrial range) via fused trim and low-TC design. The device tolerates any capacitive load and exhibits 120 ppm long-term stability after 1000 hours at 25°C.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm. Pin 1: Cathode (shunt current path); Pin 2: Anode (ground reference); Pin 3: NC (no internal connection, must float or tie to Pin 2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL4050C50IDBZR and REF3050AIDBZR, the LM4050CEM3-5.0/NOPB uniquely combines C-grade tolerance, sub-100 μV_rms noise, and true no-capacitor operation in a shunt configuration - making it optimal for space-constrained, low-noise, low-power analog signal conditioning where topology flexibility is limited.

Availability

LM4050CEM3-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for LM4050CEM3-5.0/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, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs.

The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement applications - emphasizing low noise, zero-capacitor stability, and wide temperature performance.

FAQ

What is the minimum operating current for LM4050CEM3-5.0/NOPB?

The LM4050CEM3-5.0/NOPB requires a minimum operating current of 56 μA at 25°C and up to 90 μA across the extended temperature range (−40°C to +125°C). This low quiescent current enables use in battery-powered devices such as handheld meters and wireless sensors where power budget is critical. The LM4050CEM3-5.0/NOPB maintains regulation down to this threshold while holding 5.0 V output within specification.

Does LM4050CEM3-5.0/NOPB require an output capacitor?

No, the LM4050CEM3-5.0/NOPB does not require an output capacitor for stability. Its internal design eliminates the need for external capacitance, even with capacitive loads - a key advantage over many competing shunt references. This simplifies layout, reduces bill-of-materials cost, and avoids capacitor-related aging or ESR drift issues that could affect long-term reference accuracy in the LM4050CEM3-5.0/NOPB.

What is the thermal hysteresis specification for LM4050CEM3-5.0/NOPB?

The LM4050CEM3-5.0/NOPB has a maximum thermal hysteresis of 1.4 mV, measured as the voltage difference at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable calibration performance in field-deployed equipment subject to repeated thermal cycling - a critical parameter for test and measurement instruments using the LM4050CEM3-5.0/NOPB as a primary reference.

Is LM4050CEM3-5.0/NOPB qualified for automotive applications?

The LM4050CEM3-5.0/NOPB is not AEC-Q100 qualified; it belongs to the industrial-grade LM4050-N family. For automotive applications, TI offers the pin-compatible LM4050-N-Q1 series (e.g., LM4050CQEM3-5.0/NOPB), which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. The LM4050CEM3-5.0/NOPB itself is rated for −40°C to +125°C but lacks automotive qualification documentation and screening.

What is the wideband noise performance of LM4050CEM3-5.0/NOPB?

The LM4050CEM3-5.0/NOPB delivers 93 μV_rms wideband noise over the 10 Hz to 10 kHz frequency range, measured at 100 μA operating current. This low noise level supports high-resolution analog-to-digital conversion in 16-bit and higher data acquisition systems. The noise performance is confirmed in the official TI datasheet section 6.8 and is a distinguishing feature versus higher-noise alternatives like the TL4050 series, making the LM4050CEM3-5.0/NOPB especially valuable in precision measurement applications.