My Inquiry
My Account
Texas Instruments LM4040EIM3X-2.0/NOPB
- Part No.:
- LM4040EIM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040EIM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,787
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040EIM3X-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference with 2.048 V nominal reverse breakdown voltage, ±2% initial tolerance (Grade E), 100 ppm/°C max temperature coefficient, 60–15,000 μA operating current range, and SOT-23-3 package-used for ADC/DAC biasing, sensor excitation, and portable instrumentation calibration.
For engineers reviewing the LM4040EIM3X-2.0/NOPB datasheet, LM4040EIM3X-2.0/NOPB pinout, LM4040EIM3X-2.0/NOPB application, or LM4040EIM3X-2.0/NOPB equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial-grade temperature performance (−40°C to +85°C), and real-world substitution guidance for low-power analog reference design.
Technical Context
The LM4040EIM3X-2.0/NOPB employs a Zener-zap trimmed bandgap reference architecture with curvature-corrected temperature drift compensation, enabling stable 2.048 V output across −40°C to +85°C without external capacitors. Its low dynamic impedance (≤1.1 Ω at 1 mA) and wide current range (60 μA–15 mA) support operation under highly variable load conditions.
It operates as a two-terminal shunt device: cathode sinks current to establish regulated voltage between cathode and anode (ground), with no input supply required-only a series resistor sets operating current. The SOT-23-3 package supports board-level thermal management via PCB copper area, with RθJA = 291.9°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage-precisely calibrated for 12-bit DAC/ADC full-scale reference in battery-powered systems. |
| Initial Tolerance | ±2% at 25°C (Grade E)-enables cost-optimized designs where post-calibration or software trimming compensates for offset. |
| Temp Coefficient | Max ±100 ppm/°C over −40°C to +85°C-ensures ≤±0.13% output drift across industrial temperature range. |
| Operating Current | 60 μA to 15 mA-supports ultra-low-power sleep modes (e.g., 60 μA @ 2.048 V = 123 μW) and high-current transient loads. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA-minimizes output voltage shift during load transients, critical for high-resolution data acquisition stability. |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz)-low enough for 16-bit system noise budgets without additional filtering. |
| Long-Term Stability | 120 ppm after 1000 hours-predictable aging behavior for field-deployed instrumentation requiring recalibration intervals. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, gull-wing leads, JEDEC standard footprint. Thermal pad not present; power dissipation derated above 25°C per RθJA = 291.9°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current sink / output node | Connected to regulated voltage node; sinks all current through series resistor-defines VOUT = VCATHODE – VANODE. |
| Anode (Pin 2) | Reference ground terminal | Typically connected to system ground; forms return path for shunt current-voltage regulation occurs across cathode-to-anode. |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to anode (Pin 2); no internal connection-omitted in schematic symbol but present mechanically. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero output capacitance-reduces BOM count and PCB area in space-constrained wearables and IoT nodes. |
| Tolerates capacitive loads | Remains stable driving ≥10 nF-enables direct buffering of ADC reference inputs without isolation resistors. |
| Micropower operation | 60 μA minimum operating current-extends battery life in coin-cell–powered sensors (e.g., >10-year runtime at 1 sample/sec). |
| Fixed 2.048 V output | Matches common 12-bit full-scale binary (212 = 4096; 2.048 V = 500 mV × 4.096)-eliminates scaling resistors in microcontroller ADC references. |
| AEC-Q100 qualified variants | SOT-23 package available in Grade 1 (−40°C to +125°C) and Grade 3 (−40°C to +85°C)-supports automotive sub-systems without derating. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and lithium coin-cell power source. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V for ADC full-scale calibration and sensor signal conditioning. Use Value: 60 μA quiescent current enables >5-year battery life; ±2% initial tolerance accommodated by factory calibration routine. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals with 24-bit delta-sigma ADC. IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference buffer and current-sense amplifier biasing. Use Value: 35 μVrms noise ensures <1 LSB error in 24-bit conversion; 100 ppm/°C TC maintains accuracy across cabinet temperature swings. |
| Energy Monitoring Sensors | Automotive Body Control Modules |
Use Scenario: Smart electricity meter using isolated current shunt sensing and metrology-grade ADC. IC Role / Device Role / Timing Role: Primary reference for voltage channel ADC and anti-aliasing filter biasing. Use Value: 120 ppm long-term stability reduces annual recalibration frequency; SOT-23 footprint fits dense meter PCB layouts. |
Use Scenario: In-vehicle cabin temperature sensor node with LIN bus interface and 12 V supply. IC Role / Device Role / Timing Role: Stable 2.048 V reference for thermistor measurement ADC and microcontroller VREF input. Use Value: AEC-Q100 Grade 3 qualification ensures reliability at 85°C ambient; 15 mA max current supports fast ADC sampling bursts. |
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 ±0.5%), higher 1 mA min current, 0.2 Ω dynamic impedance | Requires two external resistors for 2.048 V setting; less accurate due to resistor tolerance and tempco stack-up | Choose when adjustable output or tighter dynamic impedance is prioritized over fixed-voltage simplicity and micropower operation |
| MAX6002EUR+T | 2.048 V fixed shunt reference, ±0.5% initial tolerance (Grade A), 75 ppm/°C TC, 50 μA min current | Higher accuracy and lower TC than LM4040EIM3X-2.0/NOPB-but limited to SOT-23-5, no Grade E option | Choose when ±0.5% tolerance is mandatory and 50 μA operation suffices; avoid if SOT-23-3 footprint or cost-sensitive Grade E is required |
Compared with TL431ACDBVR and MAX6002EUR+T, LM4040EIM3X-2.0/NOPB offers the lowest BOM count (no resistors), smallest footprint (SOT-23-3), and optimal balance of cost, micropower capability, and industrial-temperature reliability-making it preferred for high-volume portable and sensor applications where ±2% tolerance is acceptable.
Availability
LM4040EIM3X-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, energy monitoring sensors, automotive body control modules, and industrial data acquisition systems requiring stable component supply with consistent parametric performance and long-term traceability.
Supply support for LM4040EIM3X-2.0/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, embedded processing, and connectivity technologies, with decades of expertise in precision reference design and high-reliability manufacturing.
The LM4040-N product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and industrial-grade systems-designed to replace bulkier three-terminal references while maintaining accuracy, stability, and ease of use.
FAQ
What is the exact output voltage and tolerance of LM4040EIM3X-2.0/NOPB?
The LM4040EIM3X-2.0/NOPB has a nominal reverse breakdown voltage of 2.048 V with ±2% initial tolerance at 25°C (Grade E specification). This tolerance expands to ±60 mV over the full industrial temperature range (−40°C to +85°C), as confirmed in Section 6.6 of the TI SNOS633K datasheet.
Does LM4040EIM3X-2.0/NOPB require an external capacitor for stability?
No, the LM4040EIM3X-2.0/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with zero output capacitance or up to ≥10 nF capacitive loads-verified in TI's application notes and electrical characteristics tables.
What is the minimum operating current for LM4040EIM3X-2.0/NOPB?
The LM4040EIM3X-2.0/NOPB requires a minimum operating current of 60 μA at 25°C, increasing to 65 μA across the full −40°C to +85°C range. This value is specified in Table 6.6 of the SNOS633K datasheet for Grade E devices in SOT-23 and SC70 packages.
Is LM4040EIM3X-2.0/NOPB qualified for automotive applications?
The LM4040EIM3X-2.0/NOPB itself is not AEC-Q100 qualified; however, the LM4040-N family includes AEC-Q100 Grade 3 (−40°C to +85°C) variants in SOT-23 (e.g., LM4040QAIM3X-2.0). LM4040EIM3X-2.0/NOPB is rated for industrial temperature range only.
How does the pinout of LM4040EIM3X-2.0/NOPB differ from standard SOT-23?
The LM4040EIM3X-2.0/NOPB uses a non-standard SOT-23-3 pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no connect, must float or tie to Pin 2). This differs from generic SOT-23 ICs and is explicitly defined in the "Pin Configuration and Functions" section (page 4) of the TI datasheet.
LM4040EIM3X-2.0/NOPB 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:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040EIM3X-2.0/NOPB FAQ
1.How can I place an order for LM4040EIM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040EIM3X-2.0/NOPB 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 LM4040EIM3X-2.0/NOPB reliable?
The price and inventory of LM4040EIM3X-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040EIM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040EIM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040EIM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040EIM3X-2.0/NOPB?
LM4040EIM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040EIM3X-2.0/NOPB 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 LM4040EIM3X-2.0/NOPB?
For technical support, including LM4040EIM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040EIM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040EIM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040EIM3X-2.0/NOPB 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 LM4040EIM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040EIM3X-2.0/NOPB?
All LM4040EIM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040EIM3X-2.0/NOPB, 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 LM4040EIM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040EIM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040EIM3X-2.0/NOPB 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…
