Texas Instruments LM4050AEM3-5.0/NOPB

Overview

LM4050AEM3-5.0/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 ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, and 41 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 and portable instrumentation.

For engineers reviewing the LM4050AEM3-5.0/NOPB datasheet, LM4050AEM3-5.0/NOPB pinout, LM4050AEM3-5.0/NOPB application, or LM4050AEM3-5.0/NOPB equivalent, key selection criteria include initial voltage accuracy, low dynamic impedance (0.5 Ω), no-output-capacitor operation, thermal hysteresis (1.4 mV), and compatibility with capacitive loads in space-constrained designs.

Technical Context

The LM4050AEM3-5.0/NOPB uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation. Its fixed 5.0 V output is stabilized via internal fuse-trimmed reverse breakdown voltage at wafer sort, ensuring ±0.1% accuracy at 25°C without external components.

It functions as a two-terminal shunt regulator: cathode accepts input current and sets reference voltage across anode-to-cathode terminals; anode connects to system ground. The device tolerates any capacitive load and requires no output capacitor - simplifying layout while maintaining stability across 56 μA–15 mA operating current and −40°C to +125°C junction temperature.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm. Pin 3 is NC (no internal connection); pins 1 and 2 are functional terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431CDBVR and MAX6005AESA+, the LM4050AEM3-5.0/NOPB uniquely combines A-grade ±0.1% accuracy, SOT-23 size, and capacitor-free stability - making it optimal for miniaturized, high-precision analog systems where layout simplicity and long-term drift control are mandatory.

Availability

LM4050AEM3-5.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, guaranteed long-term availability, and traceable sourcing.

Supply support for LM4050AEM3-5.0/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 and embedded processing technologies, with decades of expertise in precision reference design and high-reliability manufacturing.

The LM4050-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing low drift, low noise, and zero-external-component operation.

FAQ

What is the maximum operating current for LM4050AEM3-5.0/NOPB?

The LM4050AEM3-5.0/NOPB supports a maximum operating current of 15 mA, as specified in the Absolute Maximum Ratings table. This upper limit ensures safe power dissipation within the SOT-23 package's thermal constraints (280 mW at 25°C ambient). Exceeding 15 mA risks exceeding the device's maximum junction temperature of 150°C and may cause permanent damage or accelerated aging. Always verify power dissipation using PD = (V_REF × I_SHUNT) and derate appropriately above 25°C ambient.

Does LM4050AEM3-5.0/NOPB require an external output capacitor?

No, the LM4050AEM3-5.0/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to large bypass capacitors or ADC reference inputs. This eliminates layout complexity and potential phase-margin issues associated with traditional shunt references. The datasheet explicitly states "No Output Capacitor Required" as a core feature, validated across its full 56 μA–15 mA operating range and −40°C to +125°C temperature span.

What is the thermal hysteresis specification for LM4050AEM3-5.0/NOPB?

The LM4050AEM3-5.0/NOPB exhibits a thermal hysteresis of 1.4 mV, defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This parameter reflects non-recoverable voltage shift due to mechanical stress in the silicon die during thermal cycling. At 5.0 V nominal output, 1.4 mV corresponds to 28 ppm - well within the ±0.1% initial tolerance budget and critical for applications requiring repeatable calibration after environmental exposure, such as field-deployed test equipment.

Can LM4050AEM3-5.0/NOPB operate in automotive environments?

The LM4050AEM3-5.0/NOPB is rated for industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges but is not AEC-Q100 qualified. For automotive applications, TI offers the pin-compatible LM4050AEM3-5.0Q1 - the Q1 variant - which is AEC-Q100 Grade 1 qualified and manufactured on an automotive-grade flow. Using the standard LM4050AEM3-5.0/NOPB in automotive contexts requires full system-level qualification per ISO/TS 16949 and may void warranty or reliability guarantees.

What is the reverse dynamic impedance of LM4050AEM3-5.0/NOPB?

The reverse dynamic impedance of LM4050AEM3-5.0/NOPB is 0.5 Ω, measured at 1 mA DC bias and 120 Hz AC signal with 0.1×IR AC amplitude. This low impedance ensures minimal output voltage variation under load transients - for example, a 1 mA step change induces only 0.5 mV deviation. It directly enables high PSRR in precision analog stages and supports fast settling in multiplexed ADC reference switching applications without external buffering.