Texas Instruments LM4040DIZ-5.0/NOPB

Overview

LM4040DIZ-5.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in TO-92 package, delivering a stable 5.0 V reverse breakdown voltage with ±1% initial tolerance (Grade D), 74 μA minimum operating current, and 15 mA maximum current capability. It operates across −40°C to +85°C (Industrial Grade) and exhibits 150 ppm/°C max temperature coefficient, low 35 μV_rms noise (10 Hz–10 kHz), and no external capacitor requirement-ideal for analog input modules and field transmitters where space and stability are critical.

For engineers reviewing the LM4040DIZ-5.0/NOPB datasheet, LM4040DIZ-5.0/NOPB pinout, LM4040DIZ-5.0/NOPB application, or LM4040DIZ-5.0/NOPB equivalent, key selection criteria include its fixed 5.0 V output, TO-92 through-hole packaging, Grade D accuracy, thermal hysteresis of 0.08%, and compatibility with capacitive loads without instability.

Technical Context

The LM4040DIZ-5.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±1% initial voltage tolerance at 25°C and incorporates bandgap-derived curvature correction for improved temperature drift linearity. Its shunt topology requires an external series resistor to set operating current, and it maintains regulation over 74 μA–15 mA while rejecting load capacitance effects.

Designed for industrial-grade operation, it features 150 ppm/°C max average temperature coefficient over −40°C to +85°C, 0.3–1.1 Ω dynamic impedance (1 mA, 120 Hz), and 120 ppm long-term stability after 1000 hours-enabling reliable performance in data acquisition and energy infrastructure systems without output filtering.

Key Specifications

Pinout & Package

LM4040DIZ-5.0/NOPB is housed in a 3-pin TO-92 package (body size 4.30 mm × 4.30 mm), with leads designed for through-hole mounting and manual or wave soldering. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no connect, must float or tie to Anode per TI recommendation for EMI-sensitive layouts).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL431ACLP and REF3050AIDBZR, LM4040DIZ-5.0/NOPB offers fixed 5.0 V output with no external components, lowest min current (74 μA), and TO-92 through-hole reliability-making it optimal for cost-sensitive, space-constrained industrial analog modules where shunt topology is preferred.

Availability

LM4040DIZ-5.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and analog input modules requiring stable component supply, long-lifecycle support, and consistent TO-92 mechanical form factor.

Supply support for LM4040DIZ-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 automotive-qualified components.

The LM4040-N family was engineered for space-critical industrial and automotive applications demanding micropower operation, fixed-voltage stability, and robustness against capacitive loading-without external compensation.

FAQ

What is the operating temperature range for LM4040DIZ-5.0/NOPB?

The LM4040DIZ-5.0/NOPB is rated for Industrial Grade operation from −40°C to +85°C. It is not qualified for extended temperature ranges (−40°C to +125°C) or automotive AEC-Q100 Grade 1; those require LM4040-N-Q1 variants such as LM4040DQ50IDBZRQ1. The LM4040DIZ-5.0/NOPB's specifications-including ±1% tolerance and 150 ppm/°C tempco-are guaranteed only within the −40°C to +85°C range.

Does LM4040DIZ-5.0/NOPB require an external capacitor?

No, LM4040DIZ-5.0/NOPB does not require an external output capacitor and remains stable with any capacitive load. This eliminates board area, BOM cost, and layout sensitivity associated with capacitor selection and placement-unlike many series references. The internal design inherently compensates for load capacitance, making LM4040DIZ-5.0/NOPB especially suitable for high-impedance sensor interfaces and isolated analog front-ends.

What is the minimum cathode current needed for LM4040DIZ-5.0/NOPB to regulate at 5.0 V?

The LM4040DIZ-5.0/NOPB requires a minimum cathode current of 74 μA at 25°C to maintain regulation at its nominal 5.0 V output. This value increases slightly over temperature, reaching up to 70 μA at +85°C per datasheet Section 5.3. Below this threshold, the device exits regulation and output voltage drops nonlinearly-so proper series resistor sizing must ensure ≥74 μA under worst-case low-input-voltage conditions.

How does the TO-92 package of LM4040DIZ-5.0/NOPB affect thermal performance?

The TO-92 package (LP variant) gives LM4040DIZ-5.0/NOPB a junction-to-ambient thermal resistance (R_θJA) of 166°C/W with standard lead length, enabling dissipation of ~5.5 mW at +85°C ambient before reaching 125°C max junction temperature. This supports typical operation at ≤10 mA cathode current. For higher power, derating or heatsinking via lead thermal mass is recommended-unlike SOT-23 or SC70 versions, TO-92 offers superior thermal margin in through-hole industrial assemblies.

Is LM4040DIZ-5.0/NOPB pin-compatible with other LM4040 variants?

Yes, all LM4040 variants in TO-92 (e.g., LM4040AIZ-5.0, LM4040CIZ-5.0) share identical pinout (Cathode-Anode-NC), package dimensions, and mechanical footprint. However, electrical differences-such as tighter tolerance (±0.1%), lower tempco (100 ppm/°C), or different min current-mean substitution affects system accuracy and thermal drift. LM4040DIZ-5.0/NOPB is not a drop-in replacement for Grade A or C parts unless the design tolerates ±1% initial error and 150 ppm/°C drift.