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Texas Instruments LM4140CCM-2.0/NOPB
- Part No.:
- LM4140CCM-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM4140CCM-2.0/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:181
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Product details
Overview
LM4140CCM-2.0/NOPB from Texas Instruments is a high-precision, low-noise, low-dropout series voltage reference delivering 2.048 V output with ±0.1% initial accuracy, 3 ppm/°C temperature coefficient (C grade), and 20 mV typical dropout at 1 mA load. It features an enable pin for power management and supports portable instrumentation, precision ADC/DAC biasing, and battery-powered data acquisition systems.
For engineers reviewing the LM4140CCM-2.0/NOPB datasheet, LM4140CCM-2.0/NOPB pinout, LM4140CCM-2.0/NOPB application, or LM4140CCM-2.0/NOPB equivalent, key selection considerations include its 2.048 V output voltage, ultra-low 2.2 µVPP (0.1–10 Hz) noise, 230 µA typical supply current, enable-controlled shutdown (<1 µA), and SOIC-8 package compatibility with 1 µF output capacitance requirement.
Technical Context
The LM4140CCM-2.0/NOPB uses EEPROM-trimmed CMOS DACs for curvature-corrected temperature compensation and output voltage trimming-enabling sub-bandgap 2.048 V output with 3 ppm/°C drift over 0°C to 70°C. Its P-channel pass transistor architecture supports operation down to VIN = VREF + 20 mV (typical) and provides 8 mA output drive capability.
It operates in two functional modes: normal regulation (EN = VIN) and shutdown (EN = GND), with VREF restored in <200 µs on enable assertion. Internal discharge circuitry actively sinks the output capacitor during shutdown, preventing residual voltage hold-up and ensuring clean power sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V ±0.1% - enables precise 12-bit full-scale scaling (e.g., 2.048 V = 1 LSB × 212) in SAR ADCs and DACs |
| Tempco (C Grade) | 10 ppm/°C - ensures ≤0.7 mV drift over 0°C to 70°C ambient, critical for uncalibrated industrial sensors |
| Dropout Voltage | 20 mV (typ) at 1 mA - allows operation from 2.068 V supply, ideal for single-cell Li-ion (3.0–4.2 V) or coin-cell (3 V) systems |
| Output Noise | 2.2 µVPP (0.1–10 Hz) - supports 16+ ENOB in precision sigma-delta ADCs without external filtering |
| Supply Current | 230 µA (typ) active / 0.01 µA (typ) shutdown - extends battery life in always-on sensor nodes and portable meters |
| Enable Threshold | VIL ≤ 0.4 V, VIH ≥ 0.8×VIN - compatible with 1.8 V, 3.3 V, and 5 V logic without level-shifting |
| Load Drive | ±8 mA - sufficient to directly bias op-amp references, ADC REF pins, and small DACs without buffering |
Pinout & Package
LM4140CCM-2.0/NOPB 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; must be tied to common system ground plane |
| 2 | VIN | Positive input supply; requires ≥2.068 V for regulation; accepts up to 5.5 V max per absolute ratings |
| 3 | Enable | Digital control input; pull high to VIN for operation, low to GND for shutdown; must not float |
| 5 | NC | No-connect pin; must remain unconnected and unstubbed to avoid parasitic coupling |
| 6 | VREF | Regulated 2.048 V output; requires 1 µF ceramic/tantalum capacitor to GND for stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM + DAC trimming | Enables factory calibration of both initial accuracy and temperature curvature-eliminates need for external laser trimming or manual adjustment |
| Active output discharge | Internal sink path discharges COUT to GND during shutdown, preventing latch-up or false wake-up in downstream circuits |
| Sub-bandgap output | 2.048 V option enables direct 12-bit full-scale mapping without resistor dividers-reducing component count and thermal drift errors |
| Low-voltage operation | Operates from 1.8 V supply (for 1.024/1.25 V variants) or VREF + 20 mV (for 2.048 V)-supports ultra-low-power microcontroller domains |
| High PSRR | 70 dB @ 100 Hz (typ) - rejects ripple from switching regulators feeding mixed-signal subsystems without additional LDO staging |
Applications
| Portable Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter with 16-bit SAR ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion and internal DAC-based offset calibration. Use Value: 2.048 V output matches 16-bit full-scale range (65536 × 31.25 µV); ±0.1% accuracy eliminates system gain calibration; 10 ppm/°C tempco holds 0.02% reading stability across operating temperature. | Use Scenario: Industrial PLC analog input module digitizing 4–20 mA sensor signals. IC Role / Device Role / Timing Role: Stable excitation source for precision current-to-voltage conversion and reference for dual-slope integrator ADC. Use Value: Low 2.2 µVPP noise ensures <1 LSB noise floor in 20-bit integration cycles; 8 mA drive supports multiple parallel I/V stages without buffer amplifiers. |
| Battery-Powered Medical Sensors | Automotive Cabin Monitoring |
Use Scenario: Wearable ECG patch with ultra-low-power MCU and 12-bit ADC sampling at 250 SPS. IC Role / Device Role / Timing Role: Reference for ADC and programmable gain amplifier (PGA) bias network. Use Value: 230 µA supply current minimizes quiescent drain; enable pin synchronizes reference activation with measurement windows; 20 mV dropout enables use with aging 3 V coin cells down to 2.07 V. | Use Scenario: Occupant detection system using capacitive sensing and low-power SAR ADC in automotive infotainment head unit. IC Role / Device Role / Timing Role: Precision reference for ratiometric sensor excitation and ADC full-scale definition. Use Value: AEC-Q200 qualified variant (LM4140C-Q1) available; 0°C to 70°C spec aligns with cabin ambient range; 1 µF output cap requirement simplifies layout in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5020IDR | 2.048 V, 0.05% initial accuracy, 3 ppm/°C, 3.6 µVPP noise, SOIC-8, but no enable pin and 1.2 mA supply current | Lacks shutdown mode; higher noise limits ENOB in high-resolution delta-sigma converters | Select when ultimate DC accuracy outweighs power savings and sequencing control |
| ADR4520BRZ | 2.048 V, 0.02% initial accuracy, 2 ppm/°C, 1.75 µVPP noise, SOIC-8, no enable, 950 µA supply current | Superior noise and tempco, but 4.5× higher quiescent current and no power-gating capability | Prefer for lab-grade instrumentation where power is secondary to metrological performance |
Compared with REF5020IDR and ADR4520BRZ, LM4140CCM-2.0/NOPB uniquely balances sub-1 µA shutdown, 230 µA active current, and 2.048 V output in a pin-compatible SOIC-8 footprint-making it optimal for portable, battery-sensitive designs requiring regulated shutdown without sacrificing 12-bit scaling fidelity.
Availability
LM4140CCM-2.0/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, and battery-powered medical sensors requiring stable component supply across production lifecycles.
Supply support for LM4140CCM-2.0/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 company headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.
The LM4140 series was developed to deliver high-accuracy, low-noise, low-dropout voltage references for portable and precision measurement applications-specifically targeting systems needing sub-bandgap outputs, enable-controlled power gating, and factory-trimmed temperature stability.
FAQ
What is the minimum input voltage required for LM4140CCM-2.0/NOPB to regulate at 2.048 V?
The LM4140CCM-2.0/NOPB requires a minimum input voltage of VREF + 20 mV (2.068 V) at 1 mA load and 25°C, per datasheet Section 6.5. At full temperature range (0°C to 70°C), dropout increases to 45 mV, so VIN ≥ 2.093 V is recommended for guaranteed regulation. Operation below this risks loss of accuracy and increased noise.
Does LM4140CCM-2.0/NOPB require an output capacitor, and what type is recommended?
Yes, LM4140CCM-2.0/NOPB requires a 1 µF output capacitor connected between VREF and GND for loop stability and transient response, as specified in Section 8.1.2. Solid tantalum (e.g., Kemet T491A105M010AS) or X7R/X5R multilayer ceramic capacitors are recommended; aluminum electrolytics are discouraged due to ESR drift at low temperatures.
Can LM4140CCM-2.0/NOPB be used in automotive applications?
The standard LM4140CCM-2.0/NOPB is rated for 0°C to 70°C and is not AEC-Q200 qualified. However, Texas Instruments offers the LM4140C-Q1 variant-identical in electrical specs but qualified for automotive temperature range (−40°C to 125°C junction) and stress-tested per AEC-Q100. For cabin or infotainment use, LM4140C-Q1 is the appropriate choice.
What is the maximum load current LM4140CCM-2.0/NOPB can drive while maintaining specification?
LM4140CCM-2.0/NOPB is specified to source up to 8 mA while maintaining ±0.1% output accuracy and 10 ppm/°C tempco over temperature. Beyond 8 mA, dropout voltage rises significantly (e.g., 400 mV at 8 mA, 0°C–70°C), and load regulation degrades beyond 150 ppm/mA-requiring external buffering for higher-current applications.
How does the enable pin function, and what happens to the output during shutdown?
The enable pin (Pin 3) controls LM4140CCM-2.0/NOPB's operational state: pulled high to VIN for regulation, pulled low to GND for shutdown. During shutdown, VREF drops to 0 V within microseconds, and internal circuitry actively discharges the output capacitor to GND-preventing residual voltage that could bias downstream circuitry or cause false wake-up events.
LM4140CCM-2.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.048V
- 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-2.0/NOPB FAQ
1.How can I place an order for LM4140CCM-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4140CCM-2.0/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 LM4140CCM-2.0/NOPB reliable?
The price and inventory of LM4140CCM-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4140CCM-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4140CCM-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4140CCM-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4140CCM-2.0/NOPB?
LM4140CCM-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4140CCM-2.0/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 LM4140CCM-2.0/NOPB?
For technical support, including LM4140CCM-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4140CCM-2.0/NOPB requirements.
6.How does Aetrix verify that LM4140CCM-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4140CCM-2.0/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 LM4140CCM-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4140CCM-2.0/NOPB?
All LM4140CCM-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4140CCM-2.0/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 LM4140CCM-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4140CCM-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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