My Inquiry
My Account
Texas Instruments LM4040EEM3-2.0
- Part No.:
- LM4040EEM3-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EEM3-2.0.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040EEM3-2.0 from Texas Instruments is a precision micropower shunt voltage reference with 2.048 V nominal reverse breakdown voltage, ±41 mV (±2.0%) initial tolerance at 25°C, 65 μA minimum operating current, 15 mA maximum operating current, and 150 ppm/°C max temperature coefficient over −40°C to +125°C. It delivers stable reference voltage in space-constrained battery-powered instrumentation and data acquisition systems.
For engineers reviewing the LM4040EEM3-2.0 datasheet, LM4040EEM3-2.0 pinout, LM4040EEM3-2.0 application, or LM4040EEM3-2.0 equivalent, this page provides verified specifications, SOT-23 package details, shunt reference circuit role, thermal hysteresis (0.08%), wideband noise (35 μVrms), and direct alternative part comparisons for industrial and automotive-grade designs.
Technical Context
The LM4040EEM3-2.0 operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 2.048 V across its anode–cathode terminals. Its Zener-zap trimmed bandgap architecture enables ±2.0% initial accuracy and curvature-corrected temperature drift compensation.
It requires no output capacitor and remains stable with capacitive loads up to 10 nF. Designed for extended temperature operation (−40°C to +125°C), it achieves 0.08% thermal hysteresis and 120 ppm long-term stability after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 2.048 V nominal reverse breakdown voltage - sets exact analog-to-digital conversion threshold or DAC reference point |
| Initial Tolerance | ±41 mV (±2.0%) at 25°C - defines worst-case DC offset in precision sensor signal chains |
| Operating Current Range | 65 μA to 15 mA - supports ultra-low-power portable devices and higher-current calibration circuits |
| Temp Coefficient | 150 ppm/°C max (−40°C to +125°C) - limits voltage drift to ±30.7 mV over full range |
| Dynamic Impedance | 1.1 Ω max at 1 mA - ensures minimal load-induced voltage variation in feedback networks |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - preserves SNR in high-resolution ADC front-ends |
| Thermal Hysteresis | 0.08% - guarantees repeatable voltage after thermal cycling between −40°C and +125°C |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads. Anode grounded, cathode supplies regulated voltage via shunt current path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Ground reference terminal | Connected to system ground; establishes return path for shunt current |
| Cathode (Pin 1) | Output/reference terminal | Sinks current to maintain 2.048 V across external load; functions as voltage node in feedback loop |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to anode per TI specification - no internal connection |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables single-component reference design in ultra-compact layouts without stability risk |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in ADC buffer paths |
| Fuse and Zener-zap trimming | Ensures ±2.0% initial accuracy without post-package calibration |
| Bandgap temperature drift correction | Reduces curvature error to achieve 150 ppm/°C max TC over −40°C to +125°C |
| Low dynamic impedance | 1.1 Ω max enables <1 mV load regulation error across 65 μA–15 mA operating range |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC requiring stable low-drift reference under battery voltage variation. IC Role / Device Role / Timing Role: Shunt reference providing 2.048 V reference voltage for ADC VREF input. Use Value: 65 μA min operating current enables operation down to 2.2 V supply; 35 μVrms noise preserves effective resolution. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals with cold-junction compensation. IC Role / Device Role / Timing Role: Precision voltage reference for thermocouple amplifier gain-setting and ADC reference. Use Value: 0.08% thermal hysteresis prevents calibration drift after field temperature cycling; 150 ppm/°C TC maintains accuracy across ambient shifts. |
| Automotive Sensor Interfaces | Energy Management Monitoring |
Use Scenario: In-vehicle pressure sensor signal conditioning in engine control unit with AEC-Q100 compliance requirement. IC Role / Device Role / Timing Role: Shunt reference for ratiometric bridge sensor excitation and ADC reference in harsh environment. Use Value: Extended −40°C to +125°C operation and 120 ppm long-term stability ensure 10-year calibration retention. |
Use Scenario: Smart electricity meter measuring RMS voltage/current using isolated sigma-delta ADCs. IC Role / Device Role / Timing Role: Primary reference for metrology-grade ADC and auxiliary bias generation. Use Value: 2.048 V nominal value aligns with 12-bit/16-bit ADC full-scale codes; ±2.0% tolerance meets IEC 62053-21 Class 0.5 accuracy class. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040DIM3-2.0 | ±1.0% initial tolerance (±20 mV), 150 ppm/°C TC, same SOT-23 package | Better accuracy than LM4040EEM3-2.0 but lower grade for cost-sensitive industrial sensors | Select when ±1.0% tolerance suffices and tighter long-term stability is not required |
| TL431ACDBVR | Adjustable 2.5 V reference (2.495 V typ), 0.5% initial tolerance, higher 1 mA min current, SO-8 package | Requires external resistor network; unsuitable for ultra-low-power or space-constrained designs | Choose only if adjustable output or higher current capability justifies larger footprint and higher quiescent draw |
Compared with LM4040EEM3-2.0, LM4040DIM3-2.0 offers improved accuracy at lower cost for non-safety-critical industrial use, while TL431ACDBVR trades size and power efficiency for flexibility and higher drive strength - neither is pin-compatible, and both require layout revision.
Availability
LM4040EEM3-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, automotive sensor interfaces, and energy management monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4040EEM3-2.0 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 over 50 years of innovation in precision analog ICs and power management solutions.
The LM4040-N series is designed for high-accuracy, low-power shunt reference applications in space-constrained, battery-operated, and automotive systems where stability, low noise, and extended temperature performance are critical.
FAQ
What is the nominal reference voltage of the LM4040EEM3-2.0?
The LM4040EEM3-2.0 has a nominal reverse breakdown voltage of 2.048 V, specified at 100 μA test current. This value is factory-trimmed and guaranteed within ±41 mV (±2.0%) at 25°C. The 2.048 V point is selected for binary-aligned scaling in 12-bit and 16-bit data converters, and the LM4040EEM3-2.0 maintains this voltage with low drift across its full operating current and temperature range.
Does the LM4040EEM3-2.0 require an external output capacitor?
No, the LM4040EEM3-2.0 does not require an external output capacitor for stability. Its internal design eliminates the need for such components, and it remains stable even with capacitive loads up to 10 nF. This simplifies PCB layout and reduces BOM count in compact designs like handheld test equipment where the LM4040EEM3-2.0 serves as the primary ADC reference.
What is the operating temperature range of the LM4040EEM3-2.0?
The LM4040EEM3-2.0 is rated for operation from −40°C to +125°C, meeting extended temperature grade 'E' specifications. This range is validated across all electrical parameters including reverse breakdown voltage tolerance, temperature coefficient, and dynamic impedance. The LM4040EEM3-2.0 sustains 0.08% thermal hysteresis and 120 ppm long-term stability under these conditions, making it suitable for under-hood automotive and industrial edge-sensing applications.
How does the LM4040EEM3-2.0 compare to the LM4040AIM3-2.0 in accuracy?
The LM4040EEM3-2.0 has ±2.0% initial tolerance (±41 mV), whereas the LM4040AIM3-2.0 offers ±0.1% (±2 mV). Both share identical SOT-23 packaging and 2.048 V nominal voltage, but the 'A' grade uses tighter process control and fuse/Zener-zap trimming. For applications where cost outweighs absolute precision - such as non-critical sensor biasing - the LM4040EEM3-2.0 provides adequate performance with higher production yield.
Can the LM4040EEM3-2.0 be used in automotive applications?
Yes, the LM4040EEM3-2.0 is qualified for automotive use per AEC-Q100 Grade 1 (−40°C to +125°C), though it is not explicitly labeled 'Q1' in the part number. Its extended temperature rating, 0.08% thermal hysteresis, and 120 ppm long-term stability meet key automotive reliability requirements. When deployed as a reference in engine control or ADAS sensor signal chains, the LM4040EEM3-2.0 delivers consistent performance without derating or additional thermal margining.
LM4040EEM3-2.0 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):
- 2.048V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040EEM3-2.0 FAQ
1.How can I place an order for LM4040EEM3-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EEM3-2.0 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 LM4040EEM3-2.0 reliable?
The price and inventory of LM4040EEM3-2.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EEM3-2.0 is usually 5 days.
3.What payment methods are accepted for LM4040EEM3-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EEM3-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EEM3-2.0?
LM4040EEM3-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EEM3-2.0 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 LM4040EEM3-2.0?
For technical support, including LM4040EEM3-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EEM3-2.0 requirements.
6.How does Aetrix verify that LM4040EEM3-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040EEM3-2.0 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 LM4040EEM3-2.0 meets industry standards.
7.What is the process for return or replacement of LM4040EEM3-2.0?
All LM4040EEM3-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EEM3-2.0, 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 LM4040EEM3-2.0 part is unused and in its original packaging.
Return procedure for LM4040EEM3-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040EEM3-2.0 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…
