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Texas Instruments LM4140CCM-4.1/NOPB
- Part No.:
- LM4140CCM-4.1/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM4140CCM-4.1/NOPB.pdf
- Description:
- IC VREF SERIES 0.1% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:515
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Product details
Overview
LM4140CCM-4.1/NOPB from Texas Instruments is a high-precision, low-noise, low-dropout series voltage reference delivering 4.096 V output with ±0.1% initial accuracy, 3 ppm/°C temperature coefficient (A grade), and 2.2 µVPP (0.1–10 Hz) output noise. It operates from 1.8 V input, supports up to 8 mA load, and features an enable pin for power management - ideal for precision DACs and portable instrumentation requiring stable, low-drift references.
For engineers reviewing the LM4140CCM-4.1/NOPB datasheet, LM4140CCM-4.1/NOPB pinout, LM4140CCM-4.1/NOPB application, or LM4140CCM-4.1/NOPB 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), thermal hysteresis (20 ppm), and required 1-µF output capacitor for stability.
Technical Context
The LM4140CCM-4.1/NOPB uses EEPROM-trimmed CMOS DACs for curvature-corrected temperature compensation and output voltage trimming - enabling sub-bandgap 4.096 V output with 3 ppm/°C drift over 0°C to 70°C. Its P-channel pass transistor architecture supports low dropout (VIN ≥ VREF + 20 mV) and reverse-current protection via inherent body diode.
It implements fast ON/OFF control: VREF settles in <200 µs on enable, and internal discharge circuitry actively sinks the output capacitor during shutdown. The enable pin accepts logic-level inputs referenced to VIN, with defined thresholds (VH = 0.8×VIN, VL = 0.4 V) and nanoamp-level leakage (IH/IL ≤ 2 nA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.1% - enables precise 12-bit full-scale DAC reference without external scaling |
| Initial Accuracy | ±0.1% - eliminates need for post-assembly calibration in most industrial data acquisition systems |
| Temp. Coefficient | 3 ppm/°C (A grade) - contributes ≤123 ppm error over 0°C–70°C ambient range |
| Dropout Voltage | 20 mV (typ @ 1 mA) - allows operation from single-cell Li-ion (3.0 V min) or 3.3 V rail with margin |
| Output Noise | 2.2 µVPP (0.1–10 Hz) - supports 16-bit+ resolution in low-frequency measurement front-ends |
| Supply Current | 265 µA (typ @ 25°C), ≤1 µA in shutdown - extends battery life in portable multimeters and sensor nodes |
| Load Drive | 8 mA sourcing capability - directly drives SAR ADC reference inputs and op-amp buffers without gain stage |
| Enable Logic | Active-high enable with 0.8×VIN high threshold - compatible with standard 3.3 V/5 V GPIO without level shifters |
Pinout & Package
LM4140CCM-4.1/NOPB is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm), optimized for surface-mount assembly and thermal performance (RθJA = 119.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 7, 8 | Ground (GND) | Four dedicated ground pins minimize ground impedance and improve PSRR; all must be connected to system ground plane |
| 2 | VIN | Positive supply input - requires ≥4.116 V for stable 4.096 V output at 1 mA load |
| 3 | Enable | Active-high digital control - tie to VIN for always-on operation; floating pin causes undefined behavior |
| 5 | NC | No-connect terminal - must remain unconnected per datasheet; routing to copper violates layout guidelines |
| 6 | VREF | Precision output - requires 1-µF ceramic/tantalum capacitor to GND for loop stability and transient response |
Key Features
| Feature | Design Value |
|---|---|
| EEPROM + DAC trimming | Enables 3 ppm/°C tempco and ±0.1% accuracy without laser trimming - improves production yield and long-term stability |
| Active output discharge | Internally sinks output capacitor during shutdown - prevents voltage hold-up and ensures clean power-down sequencing |
| Sub-bandgap output | 4.096 V option below typical 1.25 V bandgap - simplifies design of 12-bit DAC interfaces without resistor dividers |
| Low 1/f noise | 2.2 µVPP (0.1–10 Hz) - critical for DC-coupled strain gauge, thermocouple, and precision weight scale front-ends |
| Reverse current protection | Body diode between VIN and VREF limits reverse current to <50 mA - prevents damage when output is precharged |
Applications
| Portable Instrumentation | Precision Data Acquisition |
|---|---|
Use Scenario: Handheld digital multimeter with 5½-digit resolution and battery-powered operation. IC Role / Device Role / Timing Role: Primary voltage reference for 24-bit sigma-delta ADC and internal DAC calibration. Use Value: 4.096 V output matches common 12-bit DAC full-scale; ±0.1% accuracy and 3 ppm/°C drift ensure measurement repeatability across temperature without recalibration. | Use Scenario: Industrial PLC analog input module measuring 4–20 mA sensor signals with 16-bit resolution. IC Role / Device Role / Timing Role: Stable excitation source for RTD bridges and reference for ADC conversion. Use Value: Low 2.2 µVPP noise preserves effective resolution; 8 mA drive capability powers multiple bridge sensors simultaneously. |
| Medical Sensor Interfaces | Battery-Powered IoT Nodes |
Use Scenario: Portable ECG monitor requiring ultra-low-noise, low-power analog front-end. IC Role / Device Role / Timing Role: Reference for instrumentation amplifier gain-setting and ADC reference. Use Value: Sub-µV noise floor avoids masking microvolt-level cardiac signals; 265 µA supply current extends operating time on coin-cell batteries. | Use Scenario: Wireless environmental sensor node with wake-on-event operation and multi-year battery life. IC Role / Device Role / Timing Role: Precision reference activated only during ADC sampling bursts. Use Value: Enable pin reduces quiescent current to 0.01 µA in sleep mode; fast <200 µs turn-on enables short-duration, low-energy measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF5040IDR | 4.096 V, 0.05% initial accuracy, 3 ppm/°C, 12 µVPP noise, SOIC-8, 0.95 mA supply current | Higher accuracy but 5.5× higher noise and 3.6× higher supply current - less suitable for battery-powered or low-noise apps | Choose REF5040IDR only when absolute initial accuracy dominates over noise and power constraints |
| ADR444BRZ | 4.096 V, 0.04% initial accuracy, 3 ppm/°C, 1.8 µVPP noise, SOIC-8, 750 µA supply current | Lower noise than LM4140CCM-4.1/NOPB but 2.8× higher supply current and no enable pin - lacks power-gating capability | Choose ADR444BRZ when lowest possible noise is critical and continuous operation is acceptable |
Compared with REF5040IDR and ADR444BRZ, the LM4140CCM-4.1/NOPB uniquely balances ultra-low noise (2.2 µVPP), micropower shutdown (0.01 µA), and integrated enable functionality - making it optimal for portable, intermittently active precision systems where power and noise are co-constrained.
Availability
LM4140CCM-4.1/NOPB is available at Aetrix Electronics and suitable for portable instrumentation, precision data acquisition, medical sensor interfaces, and battery-powered IoT nodes requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4140CCM-4.1/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, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs and reference design leadership.
The LM4140 product line delivers high-accuracy, low-drift voltage references using EEPROM-based DAC trimming - engineered specifically for portable, battery-powered, and high-resolution measurement applications demanding minimal power and maximum stability.
FAQ
What is the minimum input voltage required for stable operation of the LM4140CCM-4.1/NOPB?
The LM4140CCM-4.1/NOPB requires VIN ≥ VREF + 20 mV (typical) at 1 mA load, so minimum input is 4.116 V. Over temperature (0°C–70°C), dropout increases to 45 mV max, requiring VIN ≥ 4.141 V for guaranteed regulation. Operation below 1.8 V is not supported - this part is not rated for sub-1.8 V supplies.
Does the LM4140CCM-4.1/NOPB require an output capacitor, and what type is recommended?
Yes - the LM4140CCM-4.1/NOPB requires a 1-µF output capacitor for loop stability and transient response. Solid tantalum (e.g., Kemet T491A105M010AS) or multilayer ceramic capacitors meeting ESR specifications (1–10 Ω) are recommended. Aluminum electrolytics are discouraged due to ESR drift at low temperatures.
How does the enable function work on the LM4140CCM-4.1/NOPB, and what happens to the output during shutdown?
The LM4140CCM-4.1/NOPB enable pin is active-high: driving it to ≥0.8×VIN enables normal operation; pulling it ≤0.4 V disables the output. During shutdown, VREF drops to 0 V within microseconds, and internal circuitry actively discharges the output capacitor to ground - preventing residual voltage hold-up.
Can the LM4140CCM-4.1/NOPB drive a 10 kΩ load directly, and what is its maximum load current?
Yes - the LM4140CCM-4.1/NOPB can drive a 10 kΩ load (409.6 µA at 4.096 V) with negligible error. Its specified output drive capability is up to 8 mA (500 Ω load), and load regulation is 5 ppm/mA (typ) for the 4.096 V version - meaning <41 ppm error at full 8 mA load.
What is the thermal hysteresis specification for the LM4140CCM-4.1/NOPB, and how does it affect long-term accuracy?
The LM4140CCM-4.1/NOPB exhibits ≤20 ppm thermal hysteresis - defined as the change in 25°C output voltage after cycling between 0°C and 70°C. This is a non-cumulative, repeatable offset; it does not accumulate over cycles and is fully characterized per device. For metrology-grade designs, this value must be included in total error budget alongside initial accuracy and tempco.
LM4140CCM-4.1/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):
- 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/NOPB FAQ
1.How can I place an order for LM4140CCM-4.1/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4140CCM-4.1/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-4.1/NOPB reliable?
The price and inventory of LM4140CCM-4.1/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-4.1/NOPB is usually 5 days.
3.What payment methods are accepted for LM4140CCM-4.1/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4140CCM-4.1/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4140CCM-4.1/NOPB?
LM4140CCM-4.1/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4140CCM-4.1/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-4.1/NOPB?
For technical support, including LM4140CCM-4.1/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4140CCM-4.1/NOPB requirements.
6.How does Aetrix verify that LM4140CCM-4.1/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4140CCM-4.1/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-4.1/NOPB meets industry standards.
7.What is the process for return or replacement of LM4140CCM-4.1/NOPB?
All LM4140CCM-4.1/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4140CCM-4.1/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-4.1/NOPB part is unused and in its original packaging.
Return procedure for LM4140CCM-4.1/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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