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Texas Instruments LM4140CCM-1.0
- Part No.:
- LM4140CCM-1.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM4140CCM-1.0.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,095
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Product details
Overview
LM4140CCM-1.0 from Texas Instruments is a high-precision, low-noise, low-dropout series voltage reference with 1.024 V nominal output, 0.1% initial accuracy, 10 ppm/°C temperature coefficient (C grade), 20 mV typical dropout at 1 mA, and enable-controlled shutdown consuming ≤1 µA. It serves as a stable reference for precision ADCs, DACs, and battery-powered instrumentation.
For engineers reviewing the LM4140CCM-1.0 datasheet, LM4140CCM-1.0 pinout, LM4140CCM-1.0 application, or LM4140CCM-1.0 equivalent, key selection criteria include its sub-bandgap 1.024 V output, ultra-low 2.2 µVPP (0.1–10 Hz) noise, 230 µA operating supply current, 8 mA output drive capability, and SOIC-8 package compatibility with standard PCB layouts.
Technical Context
The LM4140CCM-1.0 employs EEPROM-trimmed CMOS DACs for curvature-corrected temperature compensation and output voltage trimming-enabling higher resolution than conventional bandgap references. Its P-channel pass transistor architecture supports operation down to VIN = VREF + 400 mV over temperature.
It features active output discharge during disable mode, fast 200 µs turn-on time, and requires a mandatory 1 µF output capacitor for loop stability. The enable pin accepts logic-level control with 0.4 V low threshold and 0.8×VIN high threshold, supporting both totem-pole and open-collector drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.024 V ±0.1% (initial accuracy); enables precise 10-bit full-scale scaling in ADC/DAC systems |
| Tempco (C Grade) | 10 ppm/°C over 0°C to 70°C; ensures ≤0.7 mV drift across industrial ambient range |
| Noise (0.1–10 Hz) | 2.2 µVPP; critical for high-resolution data acquisition without added filtering |
| Dropout Voltage | 20 mV (typ) at 1 mA; allows operation from 1.8 V supply in ultra-low-voltage systems |
| Supply Current | 230 µA (typ) active; ≤1 µA in shutdown-extends battery life in portable equipment |
| Output Drive | ±8 mA; sufficient to directly drive SAR ADC reference inputs and small op-amp bias networks |
| Enable Logic | Active-high EN pin with 0.4 V low / 0.8×VIN high thresholds; compatible with 1.8 V–5.5 V logic domains |
Pinout & Package
LM4140CCM-1.0 is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size) with exposed pad not electrically connected. Pin functions are validated per TI SNVS053F Rev F datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 8 | GND | Four dedicated ground terminals reduce ground impedance and improve PSRR/noise rejection |
| 2 | VIN | Positive input supply; must be ≥1.8 V and ≥VREF + 400 mV for regulation |
| 3 | EN | Enable control input; tie to VIN for always-on operation; must never float |
| 5 | NC | No-connect terminal; must remain unconnected per datasheet |
| 6 | VREF | Regulated 1.024 V output; requires 1 µF ceramic/tantalum capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM + DAC trimming | Enables 0.1% initial accuracy and 10 ppm/°C tempco without laser trimming-reducing cost and process variation |
| Sub-bandgap output | 1.024 V output enables exact 10-bit full-scale mapping (210 = 1024) in digital systems |
| Active output discharge | Internally discharges COUT to GND during shutdown-prevents floating reference and system latch-up |
| Low-noise architecture | 2.2 µVPP (0.1–10 Hz) supports 16+ bit precision without external noise filtering |
| Ultra-low dropout | 20 mV dropout at 1 mA allows use with single-cell Li-ion (3.0 V min) or coin-cell (3 V) supplies |
Applications
| Portable Data Loggers | Precision Weigh Scales |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node acquiring temperature, humidity, and pressure with 16-bit ADC. IC Role / Device Role / Timing Role: Primary voltage reference for SAR ADC and internal DAC calibration. Use Value: 1.024 V output enables integer-based LSB calculation; 230 µA quiescent current extends 2-year battery life. |
Use Scenario: Strain-gauge-based industrial weighing platform requiring <0.01% linearity over 0–70°C. IC Role / Device Role / Timing Role: Excitation reference for Wheatstone bridge and reference for 24-bit ΣΔ ADC. Use Value: 10 ppm/°C tempco limits bridge offset drift to <70 ppm; 2.2 µVPP noise avoids resolution loss in microvolt-range signals. |
| Medical Patient Monitors | Automotive Battery Management |
|
Use Scenario: Portable ECG device digitizing biopotentials with low-power 14-bit ADC and real-time filtering. IC Role / Device Role / Timing Role: Stable reference for analog front-end gain stages and ADC conversion. Use Value: Enable pin synchronizes reference activation with measurement window-cutting average system power by 99.5%. |
Use Scenario: Cell-voltage monitoring IC in 12S Li-ion BMS requiring accurate 1.024 V reference for ADC channel calibration. IC Role / Device Role / Timing Role: Precision reference for multiplexed cell voltage sampling under varying thermal conditions. Use Value: SOIC-8 package withstands automotive reflow profiles; 0.1% initial accuracy eliminates per-unit calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3012AIDBZR | 1.2 V output, 50 ppm/°C max, 50 µA IQ, SOT-23-3 package | Lacks enable pin and output drive; unsuitable for 8 mA loads or shutdown sequencing | Choose only if board space is constrained and 1.2 V suffices; verify tempco impact on system accuracy |
| ADR3410ARJZ-R7 | 1.0 V output, 10 ppm/°C max, 120 µA IQ, SOT-23-5 package | No enable function; lower output drive (5 mA); requires external bypass cap for stability | Select when lower quiescent current is critical and enable control is handled externally |
Compared with REF3012AIDBZR and ADR3410ARJZ-R7, LM4140CCM-1.0 uniquely delivers 1.024 V with enable control, 8 mA drive, and SOIC-8 layout compatibility-making it optimal for systems needing exact binary-scaled references and integrated power management.
Availability
LM4140CCM-1.0 is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, and medical sensing applications requiring stable component supply, long-term calibration integrity, and automotive-grade reliability.
Supply support for LM4140CCM-1.0 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 designing analog, embedded processing, and connectivity technologies for industrial, automotive, and personal electronics markets.
The LM4140 series was engineered to deliver sub-bandgap precision references with EEPROM-based trimming-targeting high-accuracy, low-power, and battery-operated measurement systems where traditional bandgap references fall short.
FAQ
What is the minimum input voltage required for LM4140CCM-1.0 to regulate at 1.024 V?
The LM4140CCM-1.0 requires VIN ≥ 1.8 V for proper operation, with a typical dropout of 20 mV at 1 mA load. Over temperature (0°C to 70°C), VIN must be at least VREF + 400 mV (i.e., ≥1.424 V) to maintain regulation-verified per Electrical Characteristics table in TI SNVS053F.
Does LM4140CCM-1.0 require an output capacitor, and what type is recommended?
Yes, LM4140CCM-1.0 requires a 1 µF output capacitor for loop stability and transient response. TI validates solid tantalum (e.g., Kemet T491A105M010AS) and multilayer ceramic capacitors (e.g., Murata GRM42-6Y5V225Z16) meeting ESR requirements in Figure 23 of the datasheet.
How does the enable pin of LM4140CCM-1.0 behave during shutdown?
When EN is pulled low (<0.4 V), LM4140CCM-1.0 enters shutdown, reducing supply current to ≤1 µA and actively discharging the output capacitor to GND via internal circuitry-ensuring rapid, controlled reference collapse without floating nodes.
Can LM4140CCM-1.0 drive a 10 kΩ load directly while maintaining accuracy?
Yes. With 1.024 V output and 8 mA maximum source/sink capability, LM4140CCM-1.0 can drive a 10 kΩ load (102.4 µA) with negligible error-load regulation is specified at 1–8 mA and contributes <20 ppm/mA, well within 0.1% initial accuracy budget.
Is LM4140CCM-1.0 qualified for automotive applications?
LM4140CCM-1.0 is specified over 0°C to 70°C and used in automotive BMS designs per TI application notes, but it is not AEC-Q200 qualified. For production automotive use, confirm qualification status with Texas Instruments' latest product change notices and reliability reports.
LM4140CCM-1.0 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):
- 1.024V
- 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:
- 375µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LM4140CCM-1.0 FAQ
1.How can I place an order for LM4140CCM-1.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4140CCM-1.0 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 LM4140CCM-1.0 reliable?
The price and inventory of LM4140CCM-1.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4140CCM-1.0 is usually 5 days.
3.What payment methods are accepted for LM4140CCM-1.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4140CCM-1.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4140CCM-1.0?
LM4140CCM-1.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4140CCM-1.0 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 LM4140CCM-1.0?
For technical support, including LM4140CCM-1.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4140CCM-1.0 requirements.
6.How does Aetrix verify that LM4140CCM-1.0 is sourced from the original manufacturer or authorized distributors?
All LM4140CCM-1.0 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 LM4140CCM-1.0 meets industry standards.
7.What is the process for return or replacement of LM4140CCM-1.0?
All LM4140CCM-1.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4140CCM-1.0, 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 LM4140CCM-1.0 part is unused and in its original packaging.
Return procedure for LM4140CCM-1.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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