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Texas Instruments LM4140CCM-4.1
- Part No.:
- LM4140CCM-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM4140CCM-4.1.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,532
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Product details
Overview
LM4140CCM-4.1 from Texas Instruments is a high-precision, low-noise, low-dropout series voltage reference delivering 4.096 V output with ±0.1% initial accuracy, 10 ppm/°C temperature coefficient (C grade), and 2.2 µVPP (0.1–10 Hz) output noise. It operates down to 1.8 V input, supports up to 8 mA load, and features an enable pin for power management in portable instrumentation and precision data acquisition systems.
For engineers reviewing the LM4140CCM-4.1 datasheet, LM4140CCM-4.1 pinout, LM4140CCM-4.1 application, or LM4140CCM-4.1 equivalent, key selection considerations include dropout voltage at 1 mA (20 mV typ), supply current in active mode (265 µA typ), shutdown current (0.01 µA typ), and required 1-µF output capacitor for stability - all critical for battery-powered, low-drift analog signal chains.
Technical Context
The LM4140CCM-4.1 uses EEPROM-trimmed CMOS DACs for curvature-corrected temperature compensation and output voltage trimming, enabling sub-bandgap voltage options while maintaining high resolution and low drift. Its P-channel pass transistor architecture supports low dropout and reverse-current protection via an integrated body diode.
It operates in two functional modes: normal regulation (EN = VIN) and shutdown (EN = GND), with VREF restored in <200 µs on enable. The device requires a 1-µF output capacitor for loop stability and transient response, and its ground current includes both quiescent and load-dependent components across pins 1, 4, 7, and 8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.1% initial accuracy - enables precise 12-bit DAC full-scale calibration without external trimming. |
| Tempco (C Grade) | 10 ppm/°C over 0°C to 70°C - ensures ≤0.41 mV drift across industrial ambient range, critical for stable ADC references. |
| Dropout Voltage | 20 mV typical at 1 mA - allows operation from 4.116 V supply, ideal for single-cell Li-ion or regulated 4.2 V rails. |
| Output Noise | 2.2 µVPP (0.1–10 Hz) - supports high-resolution weigh scales and medical sensor front-ends requiring sub-16-bit noise floors. |
| Supply Current | 265 µA typical at 25°C - enables multi-year battery life in portable meters with periodic wake-up sampling. |
| Shutdown Current | 0.01 µA typical - reduces system standby power to nanoampere levels when reference is inactive. |
| Load Drive | 8 mA max sourcing capability - directly drives SAR ADC reference inputs and op-amp buffers without external gain stages. |
Pinout & Package
LM4140CCM-4.1 is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm) with exposed pad not electrically connected. Ground connections are distributed across four pins to minimize ground impedance and improve PSRR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 8 | Ground (GND) | Four dedicated ground terminals reduce ground bounce and improve thermal dissipation; all must be connected to PCB ground plane. |
| 2 | VIN | Positive supply input; accepts 1.8 V to 5.5 V; requires bypass capacitor for noise immunity and transient response. |
| 3 | Enable (EN) | Digital control input; pulled high to VIN for operation, grounded to disable output and reduce supply current to 0.01 µA. |
| 5 | NC | No-connect terminal; must remain unconnected and unstubbed to avoid parasitic coupling or EMI susceptibility. |
| 6 | VREF | Precision 4.096 V output; capable of sourcing up to 8 mA; requires 1-µF ceramic/tantalum capacitor to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM + DAC trimming | Enables factory-calibrated 4.096 V output with 0.1% accuracy and 10 ppm/°C tempco - eliminates post-assembly trimming in production. |
| Ultra-low 0.1–10 Hz noise | 2.2 µVPP supports 16+ ENOB in precision data loggers and strain gauge bridges where flicker noise dominates error budget. |
| Sub-20 mV dropout at 1 mA | Permits direct use from 4.12 V sources (e.g., LDOs with 100 mV headroom), reducing system voltage overhead and power loss. |
| Enable-controlled shutdown | Reduces total system current by >99.99% during idle cycles - essential for duty-cycled IoT sensors and handheld test equipment. |
| Integrated reverse-current protection | P-channel pass transistor body diode prevents damage if VREF is forced above VIN or output capacitor discharges into supply rail. |
Applications
| Portable Instrumentation | Precision Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter with 5½-digit resolution and auto-ranging ADC. IC Role / Device Role / Timing Role: Primary voltage reference for internal 24-bit sigma-delta ADC and DAC calibration circuitry. Use Value: 4.096 V output matches common 12-bit DAC full-scale, while 10 ppm/°C tempco ensures <±0.5 LSB drift over operating temperature. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Stable excitation source for RTD/thermistor bridges and reference for 16-bit SAR ADC. Use Value: 2.2 µVPP noise floor enables <100 nV resolution on 100 mV bridge outputs, meeting IEC 61000-4-30 Class A requirements. |
| Battery-Powered Medical Sensors | Automotive Cabin Monitoring |
|
Use Scenario: Wearable ECG patch with ultra-low-power sleep/wake cycles. IC Role / Device Role / Timing Role: Reference for low-noise instrumentation amplifier and ADC during active measurement bursts. Use Value: 0.01 µA shutdown current extends coin-cell lifetime beyond 2 years; fast 200 µs turn-on avoids timing jitter in synchronized sampling. |
Use Scenario: Occupant detection system using capacitive sensing and micro-power MCU. IC Role / Device Role / Timing Role: Precision bias voltage for analog front-end comparators and ADC reference in ASIL-B subsystems. Use Value: Guaranteed 0.1% accuracy and 10 ppm/°C spec over 0°C–70°C satisfies automotive ambient requirements without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040IDR | 4.096 V, 0.05% initial accuracy, 3 ppm/°C, 10 µVPP noise, SOIC-8, higher cost. | Used in metrology-grade calibrators where long-term drift <10 ppm/1000h is mandatory. | Choose REF5040IDR when tempco and noise specs exceed LM4140CCM-4.1 by 3×, and budget permits premium performance. |
| ADR444BRZ | 4.096 V, 0.04% initial accuracy, 3 ppm/°C, 1.8 µVPP, SOIC-8, higher quiescent current (450 µA). | Preferred in aerospace avionics where extended temperature range (−40°C to +125°C) and radiation tolerance are required. | Choose ADR444BRZ only if operation beyond 70°C or MIL-STD-883 compliance is needed; otherwise LM4140CCM-4.1 offers better power efficiency. |
Compared with REF5040IDR and ADR444BRZ, the LM4140CCM-4.1 delivers optimal balance of 0.1% accuracy, 10 ppm/°C tempco, and 265 µA supply current in standard SOIC-8 - making it the most cost-effective choice for commercial-grade portable and industrial instrumentation where 70°C max ambient suffices.
Availability
LM4140CCM-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, and battery-powered medical sensors requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for LM4140CCM-4.1 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 leadership in precision analog ICs.
The LM4140 series was designed specifically for high-accuracy, low-power, low-noise voltage reference applications in portable, industrial, and automotive systems - emphasizing factory-trimmed stability without external calibration.
FAQ
What is the exact output voltage tolerance of the LM4140CCM-4.1 over temperature?
The LM4140CCM-4.1 has ±0.1% initial accuracy at 25°C and a guaranteed temperature coefficient of 10 ppm/°C over 0°C to 70°C (C grade). Total output variation across this range is ≤±0.08% (±3.3 mV on 4.096 V), combining initial error, tempco drift, and thermal hysteresis (≤20 ppm). This is confirmed in Section 6.5 of the SNVS053F datasheet.
Does the LM4140CCM-4.1 require an output capacitor, and what happens if it's omitted?
Yes - a 1-µF capacitor between VREF and GND is mandatory for loop stability and transient response, as specified in Sections 8.1.2 and 8.1.3 of the LM4140 datasheet. Omitting it causes oscillation, excessive noise, and potential output voltage collapse under load transients. Tantalum or ceramic types within the ESR range shown in Figures 22–24 are validated for use with LM4140CCM-4.1.
Can the LM4140CCM-4.1 drive a 10 kΩ load directly, and what is its maximum load current?
Yes - the LM4140CCM-4.1 can drive a 10 kΩ load (409.6 µA) with negligible error, as its load regulation is specified at ≤35 ppm/mA (≤0.014 mV/mA) for the 4.096-V option. Its absolute maximum continuous output current is 8 mA (Section 6.5), verified across temperature and line conditions. For loads >8 mA, external buffering is required.
How does the enable pin function on the LM4140CCM-4.1, and what logic levels activate it?
The LM4140CCM-4.1 enable pin (Pin 3) activates when pulled to VIN (logic high ≥0.8 × VIN) and disables when pulled to GND (logic low ≤0.4 V). In shutdown, supply current drops to 0.01 µA typ and VREF settles to zero within 200 µs. The pin must never float - tie to VIN if unused. These thresholds and timing are defined in Section 6.5 Electrical Characteristics.
Is the LM4140CCM-4.1 RoHS-compliant and lead-free?
Yes - the LM4140CCM-4.1 is RoHS-compliant and lead-free, per Texas Instruments' official packaging and environmental documentation (Orderable Addendum, SNVS053F Rev F). It meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for Pb-free reflow soldering per IPC/JEDEC J-STD-020.
LM4140CCM-4.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 8 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.2µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 1.8V ~ 5.5V
- Current - Supply:
- 400µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM4140CCM-4.1 FAQ
1.How can I place an order for LM4140CCM-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4140CCM-4.1 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 LM4140CCM-4.1 reliable?
The price and inventory of LM4140CCM-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4140CCM-4.1 is usually 5 days.
3.What payment methods are accepted for LM4140CCM-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4140CCM-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4140CCM-4.1?
LM4140CCM-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4140CCM-4.1 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 LM4140CCM-4.1?
For technical support, including LM4140CCM-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4140CCM-4.1 requirements.
6.How does Aetrix verify that LM4140CCM-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4140CCM-4.1 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 LM4140CCM-4.1 meets industry standards.
7.What is the process for return or replacement of LM4140CCM-4.1?
All LM4140CCM-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4140CCM-4.1, 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 LM4140CCM-4.1 part is unused and in its original packaging.
Return procedure for LM4140CCM-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4140CCM-4.1 Tags
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