LM4140ACM-1.2/NOPB Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments LM4140ACM-1.2/NOPB is a precision micropower low-dropout voltage reference with a 1.25 V output, ±0.2% initial accuracy, 10 ppm/°C temperature coefficient, and 1.8 V to 5.5 V input range in an 8-pin SOIC package. RoHS-compliant lead-free variant.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LM4140ACM-1.2/NOPB Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $6.3400(MOQ 95)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM4140ACM-1.2/NOPB?
- Precision 1.25 V low-dropout reference with ±0.2% initial accuracy and output range 1.2488 V to 1.2513 V for 12-bit to 16-bit ADC references
- Ultra-low 10 ppm/°C typical temperature coefficient maintains stable output from -40°C to +125°C across industrial and automotive temperature ranges
- Wide input range 1.8 V to 5.5 V with low dropout enables use in 3.3 V and 5 V systems with minimal headroom requirement
- RoHS-compliant lead-free (NOPB) 8-pin SOIC package, drop-in replacement for LM4140ACM-1.2 in green manufacturing workflows
What is LM4140ACM-1.2/NOPB used for?
The LM4140ACM-1.2/NOPB provides a stable 1.25 V precision reference for 12-bit to 16-bit ADC and DAC circuits in data acquisition systems, industrial instrumentation, and precision power supply feedback networks. Its 1.8 V minimum input voltage and lead-free SOIC-8 package make it ideal for RoHS-compliant portable medical devices, smart meter analog front ends, and battery-powered sensor systems requiring low quiescent current and tight long-term voltage stability.
What are the specifications of LM4140ACM-1.2/NOPB?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | THREE TERMINAL VOLTAGE REFERENCE |
| Input Voltage-Max | 5.5V |
| Input Voltage-Min | 1.8V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Voltage-Max | 1.2513V |
| Output Voltage-Min | 1.2488V |
| Output Voltage-Nom | 1.25V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.8V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temp Coef of Voltage-Max | 3ppm/°C |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Trim/Adjustable Output | NO |
| Voltage Tolerance-Max | 0.1% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Where can I find the LM4140ACM-1.2/NOPB datasheet?
LM4140ACM-1.2/NOPB Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM4140ACM-1.2/NOPB?
Compatible alternatives and drop-in replacements for LM4140ACM-1.2/NOPB:
Voltage Reference, 1 Output, 1.25V, PDSO8
Frequently Asked Questions
How does LM4140ACM-1.2/NOPB differ from LM4140ACM-1.2 and can they be used interchangeably?
LM4140ACM-1.2/NOPB is the RoHS-compliant, lead-free version of LM4140ACM-1.2, indicated by the NOPB suffix (No Lead, No PBF). Both share identical electrical specifications: 1.25 V nominal output, ±0.2% accuracy, 10 ppm/°C temperature coefficient, and the same 8-pin SOIC footprint—making them direct drop-in substitutes on existing PCBs while meeting current environmental regulations.
What is the minimum input voltage required to maintain LM4140ACM-1.2/NOPB's 1.25 V output accurately?
LM4140ACM-1.2/NOPB requires a minimum input voltage of 1.8 V to regulate its 1.25 V output, giving a dropout voltage of approximately 550 mV. This low-dropout characteristic allows the reference to operate from a 1.8 V LDO rail common in modern low-power MCU systems while still meeting the ±0.2% initial accuracy specification across the full -40°C to +125°C temperature range.
In a precision 16-bit data acquisition system, what drift error does LM4140ACM-1.2/NOPB contribute over the industrial temperature range?
With a 10 ppm/°C temperature coefficient over the -40°C to +125°C industrial range (165°C span), the output drift of LM4140ACM-1.2/NOPB is at most 1650 ppm, equivalent to about 2.06 mV on a 1.25 V reference. For a 16-bit ADC with an LSB of approximately 19 µV, this drift corresponds to roughly 108 LSBs, which is acceptable when combined with system-level calibration.
Which precision sensor interface applications are best served by LM4140ACM-1.2/NOPB?
LM4140ACM-1.2/NOPB is best suited for Wheatstone bridge excitation in pressure and strain gauge sensors, RTD signal conditioning front ends, and precision current sensing circuits where the 1.25 V reference feeds an instrumentation amplifier or 12-bit to 16-bit SAR ADC. Its 10 ppm/°C drift and low quiescent current also make it a preferred voltage reference for smart meters, medical patient monitoring devices, and industrial transmitters requiring stable long-term accuracy.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 95+ | $6.3400 | $602.30 |
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