Texas Instruments LM4040D30QDBZR

Mfr. Part

LM4040D30QDBZR

Manufacturer

Luminary Micro / Texas Instruments. Y-IC is a quality distributor of Texas Instruments brands. We provide the best products and trusted services to every customer.

Detailed Description

Precision micropower shunt voltage reference. Fixed 3.0 V output. 1% initial accuracy. SOT‑23‑3 package. Surface‑mount. Wide operating temperature range −40°C to 125°C TA. ROHS3 compliant. Tape and Reel for automated assembly.

Key Features

Shunt reference topology, simple to use with one resistor

Fixed 3.0 V reference output

1% tolerance grade D

Temperature coefficient 150 ppm/°C typical

Operates from very low current up to 15 mA

Small SOT‑23‑3 footprint

Automotive grade Q version in this part number

ROHS3 compliant, lead‑free finish

Package marking DBZ (SOT‑23), reel version R

Key Advantages

Stable 3.0 V reference over temperature and supply variations

Very low operating current saves power in battery devices

Simple biasing, minimal external parts, low BOM cost

Tiny package saves PCB space and enables high‑density layouts

Automotive‑grade option supports harsh environments

Broad availability and multi‑source ecosystem

Packaging

Shipment type Tape & Reel TR, ideal for high‑volume SMT pick‑and‑place

Device package SOT‑23‑3 (also referred to as TO‑236‑3, SC‑59, SOT‑23-3)

Material molded epoxy body, copper alloy leadframe, matte tin (Sn) lead finish, lead‑free

Typical body size about 2.9 mm x 1.3 mm x 1.1 mm height; lead pitch about 0.95 mm

Pin configuration 3 leads, anode and cathode plus one no‑connect pin (check datasheet pinout for exact numbering)

Mounting type Surface Mount

Thermal characteristics ambient operation −40°C to +125°C; typical SOT‑23 θJA around 200°C/W on standard boards (exact value depends on PCB and airflow)

Electrical properties fixed 3.0 V output, 1% initial accuracy, tempco 150 ppm/°C, operating current up to 15 mA, low dynamic impedance typical for LM4040 family

Note the provided noise figure “Noise 10 Hz to 10 kHz 35 Vrms” and “Current Cathode 82 A” appear to be typos; LM4040 noise is typically in µV rms, and cathode current range is typically tens of µA up to 15 mA. Please confirm exact values in the datasheet.

Lifecycle

Status Active and widely used. Not nearing discontinuation based on current industry status.

Equivalent and alternative models

- Texas Instruments LM4040A30 family (higher accuracy grades, e.g., A 0.1%, B 0.5%, D 1%). Examples: LM4040AIM3‑3.0/NOPB, LM4040BIM3‑3.0/NOPB, LM4040DIM3‑3.0/NOPB

- Texas Instruments LM4040D30DBZR (non‑Q reel variant), LM4040D30DBZTG4 (lead‑free variant)

- Analog Devices ADR5030BRMZ (3.0 V shunt reference, SOT‑23, low power)

- ON Semiconductor / onsemi NCP/Vref shunt families and TLV431 derivatives can be considered with design changes; verify voltage, accuracy, pinout

- Microchip MCP series offers 3.0 V references but many are series type; check topology and pinout carefully

Always verify pinout, topology (shunt vs series), tempco, accuracy, and package before substitution

If you need a drop‑in or automotive‑grade equivalent beyond the list, contact our sales team via the Y-IC website for tailored options

Key Application Areas

Precision reference for ADCs and DACs in microcontrollers and SoCs

Sensor signal conditioning and calibration

Portable and battery‑powered instruments needing low‑power precision reference

Automotive ECUs and modules requiring stable voltage reference over temperature

Power supplies and DC‑DC converters for accurate thresholds and monitoring

Industrial control, measurement equipment, data acquisition systems

Communication equipment and RF modules for bias/reference rails

Datasheet

Y-IC provides the most authoritative and up‑to‑date datasheet for LM4040D30QDBZR on our product page. We recommend downloading the datasheet here to confirm pinout, electrical specs, and application guidelines.

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