Texas Instruments LM4040CIM3X-10/NOPB

Overview

LM4040CIM3X-10/NOPB from Texas Instruments is a precision micropower shunt voltage reference with 10 V nominal reverse breakdown voltage, ±0.5% initial tolerance (Grade C), and 100 ppm/°C max temperature coefficient. Packaged in SOT-23 (DBZ), it operates from 100 μA to 15 mA over −40°C to +85°C and delivers 35 μV_rms wideband noise (10 Hz–10 kHz) for high-accuracy analog sensing and data acquisition systems.

For engineers reviewing the LM4040CIM3X-10/NOPB datasheet, LM4040CIM3X-10/NOPB pinout, LM4040CIM3X-10/NOPB application, or LM4040CIM3X-10/NOPB equivalent, this device serves as a stable, capacitor-tolerant, no-output-capacitor-required reference for industrial and automotive signal conditioning where low drift and micropower operation are critical.

Technical Context

The LM4040CIM3X-10/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (0.9 Ω typical at 1 mA) ensures stable regulation across load current variations from 100 μA to 15 mA.

Designed as a two-terminal shunt reference, it functions with anode grounded and cathode supplying regulated voltage via series resistor. It tolerates capacitive loads without oscillation and requires no external stabilization capacitor-enabling compact, low-BOM-count designs in space-constrained applications.

Key Specifications

Pinout & Package

SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body, 1.0 mm max height, JEDEC MO-178 compliant. Anode (pin 2) is ground reference; cathode (pin 1) delivers regulated output; pin 3 is NC (no connect), to be left floating or tied to anode per EMI mitigation guidance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431CDBVR and MAX6012AEUR+T, the LM4040CIM3X-10/NOPB uniquely combines AEC-Q100 Grade 3 qualification, 15 mA drive strength, and proven 35 μV_rms noise in a robust SOT-23 package-making it optimal for industrial and automotive data acquisition where fixed 10 V accuracy, EMI resilience, and long-term stability are mandatory.

Availability

LM4040CIM3X-10/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure metering, and automotive cabin sensor modules requiring stable component supply with guaranteed long-term continuity.

Supply support for LM4040CIM3X-10/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 automotive-qualified components.

The LM4040-N series was engineered specifically for space-constrained, high-stability analog signal chains in industrial automation and automotive subsystems-emphasizing micropower operation, capacitor tolerance, and production-trimmed accuracy without external components.

FAQ

What is the minimum operating current for LM4040CIM3X-10/NOPB?

The LM4040CIM3X-10/NOPB requires a minimum operating current of 100 μA at 25°C to maintain regulation within specification. This value increases slightly at temperature extremes, reaching 105 μA at −40°C and 108 μA at +85°C per TI's electrical characteristics table for Grade C, 10 V variants. Below this threshold, the LM4040CIM3X-10/NOPB may not sustain its rated 10 V output accuracy or stability.

Is LM4040CIM3X-10/NOPB AEC-Q100 qualified?

Yes, the LM4040CIM3X-10/NOPB is AEC-Q100 qualified per Grade 3 (−40°C to +85°C), as confirmed in the official Texas Instruments datasheet SNOS633N. It meets stress testing requirements for automotive applications including HTOL, temperature cycling, and ESD (HBM ±2000 V). The LM4040CIM3X-10/NOPB is not qualified to Grade 1 (−40°C to +125°C), which applies only to the Q1 variant suffix.

Can LM4040CIM3X-10/NOPB drive a 10 nF capacitive load?

Yes, the LM4040CIM3X-10/NOPB is explicitly characterized to tolerate capacitive loads up to 10 nF without oscillation or instability. Its internal design eliminates the need for an external series resistor or isolation capacitor-unlike many older shunt references. This capability is validated across the full −40°C to +85°C range and makes the LM4040CIM3X-10/NOPB ideal for direct connection to SAR ADC reference inputs and op-amp feedback networks.

What is the thermal hysteresis specification for LM4040CIM3X-10/NOPB?

The LM4040CIM3X-10/NOPB exhibits 0.08% thermal hysteresis, defined as the voltage difference measured at 25°C after cycling to −40°C versus after cycling to +125°C. This low hysteresis ensures repeatable 10 V output in systems subject to repeated thermal cycling-critical for field-deployed instrumentation and automotive modules. The value is consistent across all LM4040-N 10 V variants and is production-tested per TI's characterization protocol.

Does LM4040CIM3X-10/NOPB require an output capacitor?

No, the LM4040CIM3X-10/NOPB does not require an output capacitor for stability. Its advanced internal architecture provides inherent phase margin across its full operating current range (100 μA to 15 mA) and with any capacitive load up to 10 nF. Adding an output capacitor is unnecessary and may degrade transient response; TI recommends omitting it unless used for additional noise filtering in specific EMI-sensitive layouts.