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Texas Instruments LM4040CIM3-10.0
- Part No.:
- LM4040CIM3-10.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-10.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:238
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Product details
Overview
LM4040CIM3-10.0 from Texas Instruments is a precision micropower shunt voltage reference with 10.0 V nominal reverse breakdown voltage, ±0.5% initial tolerance (C grade) at 25°C, 100 μA minimum operating current, and 100 ppm/°C max temperature coefficient over −40°C to +85°C industrial range - used for accurate ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040CIM3-10.0 datasheet, LM4040CIM3-10.0 pinout, LM4040CIM3-10.0 application, or LM4040CIM3-10.0 equivalent, key selection criteria include shunt reference stability under capacitive loads, low 35 μVrms wideband noise (10 Hz–10 kHz), no external capacitor requirement, and SOT-23 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4040CIM3-10.0 employs a bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation, enabling stable 10.0 V output across −40°C to +85°C without external stabilization. Its low dynamic impedance (≤0.9 Ω at 1 mA) ensures minimal load regulation error (≤8 mV over 1–15 mA).
It operates as a two-terminal device: cathode accepts input current and delivers regulated 10.0 V at its node relative to anode (ground), tolerating capacitive loads up to 10 nF while maintaining stability - eliminating need for output capacitor and simplifying layout in battery-powered data acquisition systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.0 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±0.5% at 25°C (C grade), equating to ±50 mV absolute error |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +85°C, contributing ≤±6.5 mV drift across full range |
| Min Operating Current | 100 μA - sets minimum bias resistor value for given input voltage |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA, ensuring <1 mV output shift per 1 mA load change |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz), critical for high-resolution 16-bit+ data converters |
| Long-Term Stability | 120 ppm after 1000 hours, supporting calibration integrity in test equipment |
Pinout & Package
SOT-23 (DBZ) 3-pin surface-mount package, 2.92 mm × 1.30 mm body size, anode-grounded configuration. Pin 1 = Cathode (shunt current input/output node), Pin 2 = Anode (ground), Pin 3 = NC (no connect, must float or tie to Pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Shunt current input / regulated voltage output node | Connects to supply rail via series resistor; delivers stable 10.0 V referenced to ground |
| Pin 2 (Anode) | Ground reference terminal | Must be connected to system ground; defines 0 V reference for output voltage |
| Pin 3 (NC) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 per datasheet guidance |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct connection to ADC reference inputs without stability risk or board area penalty |
| Tolerates capacitive loads | Stable with up to 10 nF at cathode, supporting filtering and noise reduction without oscillation |
| Micropower operation | 100 μA min current enables >10-year battery life in coin-cell powered sensors |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C cycling, preserving calibration repeatability |
| Zener-zap trimmed accuracy | Fuse-based wafer-level trimming achieves ±0.5% initial tolerance without post-package adjustment |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and pressure over multi-year deployments. IC Role / Device Role / Timing Role: Shunt reference providing precise 10.0 V excitation for bridge sensors and stable reference for 16-bit SAR ADC. Use Value: Micropower operation extends coin-cell life; low noise and tight tolerance ensure ±0.1% measurement accuracy without recalibration. |
Use Scenario: 4–20 mA loop-powered transmitter conditioning analog sensor outputs in factory automation. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and analog front-end gain-setting resistors. Use Value: 100 ppm/°C tempco maintains signal chain accuracy across 0–70°C ambient; SOT-23 footprint saves space on compact loop-card PCBs. |
| Calibration Test Equipment | Medical Instrumentation |
Use Scenario: Benchtop multimeter or source-measure unit requiring traceable DC voltage references for self-calibration. IC Role / Device Role / Timing Role: Stable 10.0 V shunt reference used in internal voltage divider networks and offset correction circuits. Use Value: 120 ppm long-term stability reduces annual recalibration frequency; low thermal hysteresis ensures repeatable readings after thermal cycling. |
Use Scenario: Portable ECG or pulse oximeter with analog front-end amplifiers and ADCs demanding low-noise, stable references. IC Role / Device Role / Timing Role: Reference source for precision gain stages and ADC reference input in low-power wearable devices. Use Value: 35 μVrms noise prevents degradation of microvolt-level biopotential signals; SOT-23 allows integration into ultra-thin form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C10IDBZR | 10.0 V, ±0.5%, SOT-23, but requires ≥100 μA min current and exhibits 50 μVrms noise - higher noise than LM4040CIM3-10.0 | Same industrial temp range, but less suitable for 16-bit+ data acquisition where noise matters | Choose when legacy TL4050 design reuse is prioritized over lowest noise |
| REF3010AIDBZR | 10.0 V, ±0.2%, SOT-23, but series topology - needs output capacitor, higher quiescent current (45 μA vs. 100 μA min for LM4040) | Not a drop-in replacement: different topology changes bias network design and layout | Prefer only if tighter initial tolerance outweighs added capacitor and layout complexity |
Compared with TL4050C10IDBZR and REF3010AIDBZR, the LM4040CIM3-10.0 offers superior noise performance and true capacitor-free operation - making it optimal for space- and power-constrained shunt reference applications where 10.0 V stability and low µV-level noise are critical.
Availability
LM4040CIM3-10.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical diagnostics equipment requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040CIM3-10.0 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 high-volume manufacturing reliability.
The LM4040 family was engineered for space-constrained, battery-operated systems needing stable, low-drift, low-noise voltage references - targeting instrumentation, process control, and portable test equipment where accuracy and long-term stability are non-negotiable.
FAQ
What is the maximum operating current for LM4040CIM3-10.0?
The LM4040CIM3-10.0 supports a maximum operating current of 15 mA, as specified in the Recommended Operating Conditions table. Exceeding this limit risks exceeding the SOT-23 package's 306 mW power dissipation rating at 25°C ambient, potentially causing thermal shutdown or long-term reliability degradation. Derating is required above 25°C per the RθJA = 291.9°C/W thermal metric.
Does LM4040CIM3-10.0 require an external output capacitor?
No, the LM4040CIM3-10.0 does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to 10 nF, including direct connection to ADC reference pins or op-amp inputs. This eliminates board space, cost, and potential instability issues associated with capacitor selection and placement - a key advantage over many competing shunt references.
What is the temperature range supported by LM4040CIM3-10.0?
The LM4040CIM3-10.0 is rated for the industrial temperature range of −40°C to +85°C. It is not qualified for extended temperature (−40°C to +125°C) operation unless explicitly ordered as the 'E' grade variant (e.g., LM4040CEM3-10.0). The C-grade version's 100 ppm/°C max temperature coefficient and ±0.5% initial tolerance are guaranteed only within the −40°C to +85°C range.
How does the pinout of LM4040CIM3-10.0 differ from TO-92 versions?
The LM4040CIM3-10.0 uses the SOT-23 (DBZ) package with Pin 1 = Cathode, Pin 2 = Anode (ground), and Pin 3 = NC. In contrast, the TO-92 version (e.g., LM4040CIZ-10.0) assigns Cathode to Pin 2 and Anode to Pin 1 - a reversed pinout. Interchanging packages without layout revision will result in incorrect grounding and failure to regulate. Always verify package-specific pin functions before PCB layout.
Can LM4040CIM3-10.0 be used in automotive applications?
The standard LM4040CIM3-10.0 is not AEC-Q200 qualified. For automotive use, TI offers the LM4040-N-Q1 series (e.g., LM4040CIM3X-10.0/NOPB), which is AEC-Q100 Grade 3 qualified (−40°C to +85°C) and undergoes additional stress testing. Using the non-Q1 LM4040CIM3-10.0 in automotive environments may violate functional safety requirements and void warranty coverage.
LM4040CIM3-10.0 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):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 180µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 100 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3-10.0 FAQ
1.How can I place an order for LM4040CIM3-10.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-10.0 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 LM4040CIM3-10.0 reliable?
The price and inventory of LM4040CIM3-10.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-10.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-10.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-10.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-10.0?
LM4040CIM3-10.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-10.0 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 LM4040CIM3-10.0?
For technical support, including LM4040CIM3-10.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-10.0 requirements.
6.How does Aetrix verify that LM4040CIM3-10.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-10.0 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 LM4040CIM3-10.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-10.0?
All LM4040CIM3-10.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-10.0, 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 LM4040CIM3-10.0 part is unused and in its original packaging.
Return procedure for LM4040CIM3-10.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3-10.0 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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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
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