My Inquiry
My Account
Texas Instruments LM4040CEM3-5.0
- Part No.:
- LM4040CEM3-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CEM3-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:12,088
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040CEM3-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and operation from −40°C to +125°C. It requires no output capacitor, tolerates capacitive loads, and serves as a compact, low-drift reference in analog signal chains for industrial and automotive data acquisition systems.
For engineers reviewing the LM4040CEM3-5.0 datasheet, LM4040CEM3-5.0 pinout, LM4040CEM3-5.0 application, or LM4040CEM3-5.0 equivalent, key selection criteria include its extended-temperature shunt topology, 74 μA minimum operating current, 15 mA max reverse current capability, and compatibility with space-constrained PCB layouts requiring high DC accuracy without external stabilization.
Technical Context
The LM4040CEM3-5.0 uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its shunt architecture operates by sinking current through the cathode to maintain a precise 5.0 V across the anode–cathode terminals.
It exhibits low dynamic impedance (≤0.9 Ω at 1 mA), wide operating current range (74–15,000 μA), and low wideband noise (35 μVrms, 10 Hz–10 kHz), enabling stable performance in high-precision ADC biasing, sensor excitation, and closed-loop feedback references where load regulation and thermal hysteresis (0.08%) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage; fixed value, no adjustment required. |
| Initial Tolerance | ±0.5% at 25°C (C grade); corresponds to ±25 mV absolute error over full production lot. |
| Temp Coefficient | ≤100 ppm/°C max; ensures ≤±50 mV drift over −40°C to +125°C operating range. |
| Min Operating Current | 74 μA; minimum cathode current needed to maintain regulation at 5.0 V. |
| Max Operating Current | 15 mA; maximum safe reverse current before exceeding power dissipation limits (306 mW in SOT-23). |
| Output Noise | 35 μVrms (10 Hz–10 kHz); supports high-resolution (≥16-bit) analog-to-digital conversion without added filtering. |
| Thermal Hysteresis | 0.08% (≈4 mV); voltage shift after thermal cycling between −40°C and +125°C, measured at 25°C. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads. Thermal resistance RθJA = 291.9°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Primary current-sink terminal; voltage referenced to anode; connects to regulated node or load return path. |
| Anode (Pin 2) | O | Ground reference terminal; must be connected to system ground or low-impedance return plane. |
| NC (Pin 3) | - | No-connect; must float or tie to anode per TI recommendation for EMI suppression in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables direct integration into compact layouts without stability-compensation components or layout-sensitive decoupling. |
| Capacitive load tolerance | Stable operation with any value of output capacitance - eliminates risk of oscillation in sensor-bias or DAC-reference applications. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy at wafer level, reducing post-package calibration needs in high-volume manufacturing. |
| Extended temperature range | Rated for −40°C to +125°C operation (Grade E), supporting under-hood automotive and industrial control module deployments. |
| Low dynamic impedance | ≤0.9 Ω at 1 mA enables tight load regulation (<8 mV change from 74 μA to 15 mA), critical for ratiometric sensor interfaces. |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters in oil & gas wellheads. IC Role / Device Role / Timing Role: Shunt reference for precision DAC output scaling and current-loop compliance voltage generation. Use Value: 5.0 V output with ≤100 ppm/°C drift maintains <0.1% total error over −40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Smart meter voltage monitoring and anti-tampering detection circuits. IC Role / Device Role / Timing Role: Reference for 24-bit sigma-delta ADC measuring grid-phase voltages. Use Value: 35 μVrms noise and 0.08% thermal hysteresis prevent measurement drift during daily thermal cycling in outdoor enclosures. |
| Data Acquisition | Automotive ECUs |
Use Scenario: Isolated analog input modules for PLCs with ±10 V input ranges. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier (PGIA) offset calibration. Use Value: ±0.5% initial tolerance and 74 μA min current allow use with ultra-low-power microcontrollers and isolated DC-DC bias supplies. | Use Scenario: Battery management system (BMS) cell-voltage monitoring in EV traction packs. IC Role / Device Role / Timing Role: Stable 5.0 V reference for multiplexed 16-bit SAR ADC sampling up to 1 MS/s. Use Value: AEC-Q100 Grade 1 qualification (−40°C to +125°C) and 15 mA max current support high-speed sampling without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | Same 5.0 V output, ±0.5% tolerance, SOT-23-3 package; higher 100 μA min current; 120 ppm/°C max tempco. | Less suitable for ultra-low-current designs below 100 μA; slightly higher drift limits long-term accuracy in wide-temp automotive use. | Select TL4050C50IDBZR only if existing layout accommodates higher min current and tighter supply headroom allows 100 μA sink. |
| MAX6008BEUR+T | 5.0 V output, ±0.2% initial tolerance (B grade), SOT-23-3; 60 μA min current; 75 ppm/°C max tempco; integrated ESD protection. | Better initial accuracy and lower drift, but not AEC-Q100 qualified; limited to industrial-grade automotive subsystems. | Choose MAX6008BEUR+T when higher accuracy is prioritized over automotive qualification and supply current is constrained below 74 μA. |
Compared with TL4050C50IDBZR and MAX6008BEUR+T, the LM4040CEM3-5.0 uniquely balances AEC-Q100 Grade 1 qualification, 74 μA min operating current, and 100 ppm/°C drift in a cost-optimized SOT-23 footprint - making it optimal for production automotive BMS and industrial field transmitter designs requiring verified reliability across extreme temperatures.
Availability
LM4040CEM3-5.0 is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and automotive battery management systems requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040CEM3-5.0 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 IC development.
The LM4040-N series was engineered specifically for space-constrained, high-accuracy analog systems needing stable shunt references across industrial and automotive temperature ranges - emphasizing low drift, no-capacitor operation, and robust ESD performance.
FAQ
What is the operating temperature range for the LM4040CEM3-5.0?
The LM4040CEM3-5.0 is rated for −40°C to +125°C operation (AEC-Q100 Grade 1 extended temperature range). This specification is validated per TI's electrical characteristics table 5.7, where LM4040CEM3 parameters are explicitly tested across that full range, including overtemperature tolerance and min current behavior at TMIN and TMAX.
Does the LM4040CEM3-5.0 require an external capacitor for stability?
No, the LM4040CEM3-5.0 does not require an external output capacitor. Its internal design eliminates the need for stabilization components while maintaining stability with any capacitive load - a key feature confirmed in the device description and "No output capacitor required" bullet under Features in the datasheet.
What is the minimum cathode current needed for regulation in the LM4040CEM3-5.0?
The LM4040CEM3-5.0 requires a minimum cathode current of 74 μA to maintain regulation at 5.0 V, as specified in Table 5.3 (Recommended Operating Conditions) and verified in Table 5.7 (Electrical Characteristics for C-grade, Grade E temperature). This value increases slightly with temperature, reaching 68 μA at TMIN to TMAX.
Is the LM4040CEM3-5.0 AEC-Q100 qualified?
Yes, the LM4040CEM3-5.0 is AEC-Q100 qualified per Grade 1 (−40°C to +125°C), as stated in the "LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference" title line and confirmed in Section 1 Features: "LM4040-N-Q1 AEC Q-100 qualified for automotive applications – Extended Grade 1: −40°C to +125°C, TA".
What is the reverse dynamic impedance of the LM4040CEM3-5.0?
The reverse dynamic impedance of the LM4040CEM3-5.0 is ≤0.9 Ω, measured at 1 mA reverse current and 120 Hz frequency with 0.1×IR AC signal, as specified in Table 5.7 (Electrical Characteristics: 2V LM4040-N VR Tolerance Grades 'C', 'D', And 'E'; Temperature Grade 'E') for the LM4040CEM3 variant.
LM4040CEM3-5.0 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 83 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CEM3-5.0 FAQ
1.How can I place an order for LM4040CEM3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CEM3-5.0 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 LM4040CEM3-5.0 reliable?
The price and inventory of LM4040CEM3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CEM3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040CEM3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CEM3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CEM3-5.0?
LM4040CEM3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CEM3-5.0 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 LM4040CEM3-5.0?
For technical support, including LM4040CEM3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CEM3-5.0 requirements.
6.How does Aetrix verify that LM4040CEM3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CEM3-5.0 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 LM4040CEM3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040CEM3-5.0?
All LM4040CEM3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CEM3-5.0, 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 LM4040CEM3-5.0 part is unused and in its original packaging.
Return procedure for LM4040CEM3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CEM3-5.0 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…
