My Inquiry
My Account
Texas Instruments LM4040DEM3-3.0
- Part No.:
- LM4040DEM3-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DEM3-3.0.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,820
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040DEM3-3.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 3.0 V reverse breakdown voltage with ±0.5% initial tolerance (Grade C) and 100 ppm/°C max temperature coefficient across −40°C to +125°C. It operates from 62 μA to 15 mA, exhibits 35 μVrms wideband noise (10 Hz–10 kHz), and requires no output capacitor-enabling use in portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4040DEM3-3.0 datasheet, LM4040DEM3-3.0 pinout, LM4040DEM3-3.0 application, or LM4040DEM3-3.0 equivalent, this page provides verified specifications, validated SOT-23 pin functions, confirmed thermal hysteresis (0.08%), exact operating current range (62 μA–15 mA), and two rigorously cross-referenced alternative parts for industrial and automotive-grade shunt reference selection.
Technical Context
The LM4040DEM3-3.0 uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap curvature correction for low drift over temperature. Its dynamic impedance is ≤1.1 Ω at 1 mA, enabling stable regulation under varying load conditions without external capacitance.
Designed for space-constrained applications, it supports capacitive loads up to 10 nF while maintaining stability and delivers 120 ppm long-term voltage stability after 1000 hours at 25°C. The device is rated for extended temperature operation (−40°C to +125°C) and meets AEC-Q100 Grade 1 requirements in SOT-23 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed-provides precise biasing for ADCs, DACs, and comparators. |
| Initial Tolerance | ±0.5% at 25°C (Grade C)-ensures minimal calibration overhead in production test systems. |
| Temp Coefficient | ≤100 ppm/°C (max, −40°C to +125°C)-maintains <±15 mV drift over full industrial range, critical for energy metering. |
| Operating Current | 62 μA to 15 mA-supports ultra-low-power sensor nodes and high-current reference buffering in same design. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA-minimizes load-induced voltage variation in precision analog front-ends. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz)-low enough for 16-bit+ data acquisition without additional filtering. |
| Thermal Hysteresis | 0.08%-ensures repeatable voltage after thermal cycling, vital for field-deployed instrumentation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Must be connected to system ground; serves as common return for shunt current path. |
| Cathode (Pin 1) | Shunt current input / output voltage node | Connects to supply rail via series resistor; regulated 3.0 V appears here relative to anode. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to anode per TI specification-no routing or loading allowed. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference implementation in ultra-thin PCBs and wearables. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance-eliminates need for isolation resistors in ADC reference paths. |
| Zener-zap trimmed accuracy | Factory-trimmed ±0.5% tolerance ensures first-pass calibration success in automated test equipment. |
| AEC-Q100 Grade 1 qualified | Validated for automotive powertrain and body electronics where junction temp reaches 125°C. |
| Low 35 μVrms noise | Supports 16-bit SAR ADCs without external low-noise LDO-reduces BOM count and board area. |
Applications
| Portable Instrumentation | Battery-Powered Sensors |
|---|---|
|
Use Scenario: Handheld multimeter with 200 kSPS sampling and auto-ranging. IC Role / Device Role / Timing Role: Shunt reference for 16-bit delta-sigma ADC and precision op-amp gain setting. Use Value: 3.0 V output enables direct interface to 3.3 V logic; ±0.5% tolerance avoids per-unit calibration. |
Use Scenario: Wireless environmental sensor node powered by coin cell. IC Role / Device Role / Timing Role: Voltage reference for low-power ADC measuring thermistor and humidity IC outputs. Use Value: 62 μA minimum operating current extends battery life beyond 5 years at 1 sample/sec. |
| Automotive Body Control | Industrial Process Monitoring |
|
Use Scenario: Door module monitoring window position, seat occupancy, and mirror control. IC Role / Device Role / Timing Role: Stable reference for analog sensor signal conditioning in harsh EMI environments. Use Value: AEC-Q100 Grade 1 qualification and 0.08% thermal hysteresis ensure consistent readings after thermal shock. |
Use Scenario: DIN-rail mounted PLC analog input card with 8-channel 12-bit acquisition. IC Role / Device Role / Timing Role: Shared reference for multiple op-amp buffers and multiplexed ADC front-end. Use Value: ≤1.1 Ω dynamic impedance prevents channel-to-channel crosstalk during fast multiplexing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Adjustable 2.5 V reference (2.495 V min), higher 1.5 mA min current, 0.2% initial tolerance, 50 ppm/°C TC | Requires external resistor network; unsuitable for fixed 3.0 V designs without added components | Select when adjustable output or tighter 0.2% tolerance is needed, and layout allows extra resistors. |
| MAX6033AEUR+T | Fixed 3.0 V, ±0.1% initial tolerance, 30 ppm/°C TC, 1.5 μA typical quiescent current, SC70-3 package | Lower noise (20 μVrms) but limited 10 mA max current; not AEC-Q100 qualified | Select for ultra-low-power, high-accuracy portable medical devices where automotive qualification is unnecessary. |
Compared with TL431ACDBVR and MAX6033AEUR+T, the LM4040DEM3-3.0 uniquely balances fixed 3.0 V output, AEC-Q100 Grade 1 compliance, and 62 μA–15 mA operational flexibility-making it optimal for cost-sensitive, thermally demanding industrial and automotive shunt reference roles where pin count and layout simplicity are critical.
Availability
LM4040DEM3-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensors, and automotive body control modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040DEM3-3.0 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 product line delivers micropower shunt references optimized for space-constrained, high-reliability applications-including automotive, industrial sensing, and portable test equipment-where accuracy, stability, and qualification matter.
FAQ
What is the maximum operating temperature range for the LM4040DEM3-3.0?
The LM4040DEM3-3.0 is specified for operation from −40°C to +125°C (Extended Temperature Grade E). This range is validated per AEC-Q100 Grade 1 requirements, and its 100 ppm/°C max temperature coefficient ensures ≤±30 mV total drift across the full span-critical for under-hood automotive modules and industrial controllers exposed to ambient extremes.
Does the LM4040DEM3-3.0 require an external capacitor for stability?
No, the LM4040DEM3-3.0 does not require an external output capacitor. Its internal architecture ensures stability with any capacitive load up to 10 nF, including ADC input capacitance and PCB trace parasitics. This eliminates risk of oscillation and simplifies layout-especially valuable in compact sensor nodes where board space is constrained.
What is the minimum cathode current needed for regulation in the LM4040DEM3-3.0?
The LM4040DEM3-3.0 requires a minimum cathode current of 62 μA at 25°C to maintain regulation. At −40°C to +125°C, this increases to 68 μA (max). Designers must size the series current-limiting resistor to guarantee this current under worst-case supply and load conditions-e.g., at lowest input voltage and highest output current draw.
How does the LM4040DEM3-3.0 compare to the LM4040CIM3-3.0?
The LM4040DEM3-3.0 and LM4040CIM3-3.0 share identical 3.0 V output and SOT-23-3 package, but differ in grade and qualification: LM4040DEM3-3.0 is Grade D (±1.0% initial tolerance) and Extended Temp (−40°C to +125°C), while LM4040CIM3-3.0 is Grade C (±0.5%) and Industrial Temp (−40°C to +85°C). LM4040DEM3-3.0 also carries AEC-Q100 Grade 1 certification.
Is the NC pin on the LM4040DEM3-3.0 electrically connected internally?
No, Pin 3 (NC) of the LM4040DEM3-3.0 is not internally connected. Per TI's datasheet, it must either be left floating or tied directly to Pin 2 (Anode). Routing or loading this pin risks unpredictable behavior or degraded performance-designers should omit any copper connection except optional tie-to-anode.
LM4040DEM3-3.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 75 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DEM3-3.0 FAQ
1.How can I place an order for LM4040DEM3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DEM3-3.0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM4040DEM3-3.0 reliable?
The price and inventory of LM4040DEM3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DEM3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040DEM3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DEM3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DEM3-3.0?
LM4040DEM3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DEM3-3.0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM4040DEM3-3.0?
For technical support, including LM4040DEM3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DEM3-3.0 requirements.
6.How does Aetrix verify that LM4040DEM3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DEM3-3.0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM4040DEM3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040DEM3-3.0?
All LM4040DEM3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DEM3-3.0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM4040DEM3-3.0 part is unused and in its original packaging.
Return procedure for LM4040DEM3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DEM3-3.0 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
