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Texas Instruments LM4040CIM3X-5.0/NOPB
- Part No.:
- LM4040CIM3X-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-5.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,024
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Product details
Overview
LM4040CIM3X-5.0/NOPB 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 35 μVRMS wideband noise (10 Hz–10 kHz). It operates from 74 μA to 15 mA over −40°C to +85°C and requires no output capacitor-enabling use in space-constrained analog input modules and field transmitters.
For engineers reviewing the LM4040CIM3X-5.0/NOPB datasheet, LM4040CIM3X-5.0/NOPB pinout, LM4040CIM3X-5.0/NOPB application, or LM4040CIM3X-5.0/NOPB equivalent, this page provides verified specifications, validated pin functions for the DBZ (SOT-23) package, confirmed thermal and noise performance, and two rigorously cross-referenced alternative parts for industrial and automotive signal conditioning designs.
Technical Context
The LM4040CIM3X-5.0/NOPB implements a Zener-zap trimmed bandgap-shunt architecture with curvature-corrected temperature drift compensation, enabling stable 5.0 V reference accuracy across industrial temperature range. Its low dynamic impedance (≤0.9 Ω at 1 mA) and capacitive-load tolerance eliminate external stabilization components.
It uses fuse-based wafer-sort trimming to achieve ±0.5% initial voltage tolerance at 25°C and supports operation down to 74 μA minimum cathode current-optimized for low-power data acquisition systems where supply headroom and quiescent current are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage, fixed and non-adjustable-provides precise DC bias for ADCs and sensor signal chains. |
| Initial Tolerance | ±0.5% at 25°C (C grade)-translates to ±25 mV absolute error, suitable for 12-bit system calibration without trimming. |
| Temp Coefficient | ≤100 ppm/°C (max, −40°C to +85°C)-ensures ≤±4.25 mV drift over full industrial range, critical for field transmitter stability. |
| Operating Current | 74 μA to 15 mA-supports ultra-low-power wake-up circuits and high-current buffer stages without redesign. |
| Output Noise | 35 μVRMS (10 Hz–10 kHz)-low enough to avoid degrading ENOB in 16-bit SAR ADC front-ends. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA-minimizes load-induced voltage shift during fast transient currents in multiplexed analog inputs. |
| Thermal Hysteresis | 0.08%-equivalent to ±4 mV after thermal cycling, ensuring repeatable calibration in energy infrastructure monitoring. |
Pinout & Package
LM4040CIM3X-5.0/NOPB is packaged in a 3-pin SOT-23 (DBZ) surface-mount package with 2.92 mm × 1.30 mm body size and gull-wing leads. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no connect, must float or tie to Anode per TI layout guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Shunt current sink / reference output node | Connects to regulated voltage rail; sinks all excess current to maintain 5.0 V at this node-requires series resistor from supply. |
| Pin 2 (Anode) | Reference ground reference | Typically tied to system ground; defines the 0 V reference point for the 5.0 V output-must be low-impedance for noise immunity. |
| Pin 3 (NC) | No-connect terminal | Not internally bonded; must remain unconnected or tied to Pin 2 (Anode) to reduce EMI susceptibility in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with any capacitive load up to 10 nF-eliminates BOM cost and board area for decoupling in compact modules. |
| Micropower operation | 74 μA minimum cathode current enables battery-powered field transmitters with multi-year runtime on coin cells. |
| Low thermal hysteresis | 0.08% hysteresis ensures <±4 mV repeatability after thermal cycling-critical for recalibration-free energy metering hardware. |
| Zener-zap voltage trim | Fuse-based wafer-level trimming achieves ±0.5% initial accuracy without post-package adjustment-reduces test time and yield loss. |
| AEC-Q100 qualified option | LM4040CQIM3X-5.0/NOPB variant available for automotive Grade 3 (−40°C to +85°C)-same pinout and electrical specs with extended reliability screening. |
Applications
| Industrial Field Transmitter | Energy Infrastructure Metering |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter operating in harsh plant environments. IC Role / Device Role / Timing Role: Shunt reference providing excitation voltage for bridge sensors and reference for 16-bit ADC conversion. Use Value: 100 ppm/°C tempco and 35 μVRMS noise ensure <0.1% total measurement error over −40°C to +85°C without active compensation. |
Use Scenario: Revenue-grade electricity meter requiring long-term stability and low drift under varying ambient conditions. IC Role / Device Role / Timing Role: Precision reference for metrology-grade sigma-delta ADC measuring voltage and current channels. Use Value: 0.08% thermal hysteresis and ±0.5% initial tolerance meet IEC 62053-21 Class 0.2 accuracy requirements for 20-year field deployment. |
| Analog Input Module | Automotive Battery Monitoring |
Use Scenario: Modular PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals via programmable gain instrumentation amplifiers. IC Role / Device Role / Timing Role: Common 5.0 V reference shared across multiple ADCs and DACs for ratiometric consistency. Use Value: Low dynamic impedance (≤0.9 Ω) prevents crosstalk between channels during simultaneous sampling of multiple inputs. |
Use Scenario: 12 V battery voltage monitoring in ADAS ECUs where supply ripple and engine cranking transients exceed 100 mV. IC Role / Device Role / Timing Role: Stable 5.0 V reference for microcontroller ADC used in state-of-charge estimation algorithms. Use Value: Capacitive-load tolerance allows direct connection to MCU's internal ADC reference pin without isolation RC network. |
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, but higher 150 ppm/°C max tempco and 45 μVRMS noise. | Less suitable for high-accuracy field transmitters; acceptable for cost-sensitive industrial IO modules. | Select when lower unit cost outweighs need for sub-100 ppm/°C drift and lowest noise in metrology-grade designs. |
| REF3050AIDBZR | Series reference (not shunt); requires ≥1.2 V headroom, 50 μA quiescent current, ±0.2% initial tolerance. | Cannot replace shunt topology directly; needs redesign of bias network and supply path. | Choose only if system has sufficient supply margin and demands tighter initial accuracy than LM4040CIM3X-5.0/NOPB offers. |
Compared with TL4050C50IDBZR and REF3050AIDBZR, LM4040CIM3X-5.0/NOPB delivers superior thermal stability and lower noise in a simpler shunt configuration-making it optimal for space- and power-constrained analog signal chains where layout simplicity and long-term repeatability are prioritized over absolute initial accuracy.
Availability
LM4040CIM3X-5.0/NOPB is available at Aetrix Electronics and suitable for industrial field transmitters, energy infrastructure metering, and analog input modules requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for LM4040CIM3X-5.0/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 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, low-drift applications in industrial automation, energy metering, and automotive sensing-emphasizing ease of use, no-output-capacitor operation, and wafer-trimmed accuracy.
FAQ
What is the minimum operating current for LM4040CIM3X-5.0/NOPB?
The LM4040CIM3X-5.0/NOPB requires a minimum cathode current of 74 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature-up to 85 μA at +85°C-ensuring stable 5.0 V output even in hot industrial enclosures. The LM4040CIM3X-5.0/NOPB remains functional below this threshold but may exhibit increased voltage drift or instability.
Is LM4040CIM3X-5.0/NOPB suitable for automotive applications?
LM4040CIM3X-5.0/NOPB itself is not AEC-Q100 qualified; however, the functionally identical LM4040CQIM3X-5.0/NOPB is certified for AEC-Q100 Grade 3 (−40°C to +85°C). For automotive battery monitoring or ADAS sensor interfaces, engineers must specify the Q1 suffix version to ensure qualification-LM4040CIM3X-5.0/NOPB is intended for industrial use only.
Does LM4040CIM3X-5.0/NOPB require an external capacitor?
No, LM4040CIM3X-5.0/NOPB does not require an external output capacitor and remains stable with any capacitive load-including direct connection to ADC reference pins or long PCB traces. Its internal design eliminates phase-margin concerns common in older shunt references, reducing design iterations and bill-of-materials count.
What is the thermal hysteresis specification for LM4040CIM3X-5.0/NOPB?
The LM4040CIM3X-5.0/NOPB exhibits 0.08% thermal hysteresis-measured as the voltage difference at 25°C after cycling to −40°C versus after cycling to +125°C. For the 5.0 V output, this equates to ±4 mV maximum hysteresis error, supporting recalibration-free operation in energy metering and process control equipment deployed across wide ambient ranges.
How does the pinout of LM4040CIM3X-5.0/NOPB differ from TO-92 or SC70 variants?
LM4040CIM3X-5.0/NOPB uses the SOT-23 (DBZ) package with Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC. This differs from TO-92 (LP), where Cathode is Pin 2 and Anode is Pin 3, and SC70 (DCK), which has 5 pins with Cathode on Pin 3 and Anode on Pin 1. Layouts must not assume pin compatibility across packages-even though electrical function is identical.
LM4040CIM3X-5.0/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:
- Active
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3X-5.0/NOPB FAQ
1.How can I place an order for LM4040CIM3X-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-5.0/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 LM4040CIM3X-5.0/NOPB reliable?
The price and inventory of LM4040CIM3X-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3X-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-5.0/NOPB?
LM4040CIM3X-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-5.0/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 LM4040CIM3X-5.0/NOPB?
For technical support, including LM4040CIM3X-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-5.0/NOPB requirements.
6.How does Aetrix verify that LM4040CIM3X-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-5.0/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 LM4040CIM3X-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-5.0/NOPB?
All LM4040CIM3X-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-5.0/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 LM4040CIM3X-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM3X-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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