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LM4140ACM-1.0/NOPB
Texas Instruments
IC VREF SERIES 0.1% 8SOIC
1817 Pcs New Original In Stock
Series Voltage Reference IC Fixed 1.024V V ±0.1% 8 mA 8-SOIC
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5.0 / 5.0
- (108 Ratings)
LM4140ACM-1.0/NOPB
Product Overview
1306663
DiGi Electronics Part Number
LM4140ACM-1.0/NOPB-DGManufacturer
Texas Instruments
LM4140ACM-1.0/NOPB
Description
IC VREF SERIES 0.1% 8SOICInventory
1817 Pcs New Original In Stock
Series Voltage Reference IC Fixed 1.024V V ±0.1% 8 mA 8-SOIC
Quantity
Minimum 1
Minimum 1
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LM4140ACM-1.0/NOPB Technical Specifications
Category
Power Management (PMIC), Voltage Reference
Packaging
Tube
Series
-
Product Status
Active
Reference Type
Series
Output Type
Fixed
Voltage - Output (Min/Fixed)
1.024V
Current - Output
8 mA
Tolerance
±0.1%
Temperature Coefficient
3ppm/°C
Noise - 0.1Hz to 10Hz
2.2µVp-p
Noise - 10Hz to 10kHz
-
Voltage - Input
1.8V ~ 5.5V
Current - Supply
375µA
Operating Temperature
0°C ~ 70°C (TA)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
LM4140
Datasheet & Documents
Manufacturer Product Page
LM4140ACM-1.0/NOPB Specifications
HTML Datasheet
LM4140ACM-1.0/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
-LM4140ACM-1.0/NOPB-DG
LM4140ACM10NOPB
LM4140ACM-1.0-NDR
-LM4140ACM-1.0-NDR
*LM4140ACM-1.0/NOPB
Standard Package
95
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
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de desembre 02, 2025
High-quality components and manufacturing processes make their products reliable and long-lasting.
de desembre 02, 2025
After extensive use, the product remains in excellent condition, highlighting its resilience.
de desembre 02, 2025
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de desembre 02, 2025
The website offers helpful FAQs that cover most of my common concerns.
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Frequently Asked Questions (FAQ)
Can the LM4140ACM-1.0/NOPB be used in low-power ADC applications where supply current directly impacts battery life, and how does its 375µA operating current compare to similar precision references like the REF3010?
Yes, the LM4140ACM-1.0/NOPB is suitable for low-power ADC applications due to its relatively low 375µA supply current while maintaining high precision (±0.1% initial tolerance, 3ppm/°C tempco). Compared to the REF3010, which draws about 50µA, the LM4140ACM-1.0/NOPB consumes more current, making it less ideal for ultra-low-power designs. However, the LM4140ACM-1.0/NOPB offers better load driving capability (8mA vs. 5mA) and lower noise (2.2µVp-p vs. ~7µVp-p), making it a better choice when signal integrity is critical and moderate power is acceptable. Designers should evaluate the trade-off between precision and power: use LM4140ACM-1.0/NOPB in active-sensing systems with stable power, not in duty-cycled or energy-harvested systems.
How does the 1.024V output of the LM4140ACM-1.0/NOPB affect ADC calibration in systems using 12-bit or 16-bit converters, and is it compatible with common input voltage ranges?
The 1.024V output of the LM4140ACM-1.0/NOPB is specifically chosen for binary scaling with ADCs — each LSB in a 10-bit ADC equals exactly 1mV (1.024V / 1024), simplifying calibration and error budgeting in 12-bit and 16-bit systems. This reference voltage aligns well with ADCs that have input ranges near 1V, such as the ADS7828 or ADS8326. However, if the ADC requires a higher full-scale reference (e.g., 2.048V or 2.5V), a gain stage or alternative reference like the LM4140A-2.048 may be required. When designing with the LM4140ACM-1.0/NOPB, ensure the ADC’s reference input impedance is high (e.g., SAR or sigma-delta types) to avoid loading errors, and always decouple the output with a 1µF ceramic capacitor to minimize noise.
Is the LM4140ACM-1.0/NOPB stable when driving capacitive loads such as ADC reference inputs with large decoupling capacitors or trace parasitics?
Yes, the LM4140ACM-1.0/NOPB is designed to remain stable with capacitive loads up to 10µF, which makes it well-suited for driving ADC reference inputs that often require substantial decoupling. Unlike some older references that oscillate under capacitive loads, the LM4140 series includes internal compensation for stability. However, to avoid transient ringing or startup delays, place a small resistor (1–5Ω) in series with the output if the capacitance exceeds 1µF or if long PCB traces add series inductance. ThisRC snubber helps dampen resonance without affecting DC accuracy, ensuring reliable performance in precision signal chains.
Can the LM4140ACM-1.0/NOPB replace the MAX6325A in a high-precision data acquisition system, and what design adjustments are needed?
The LM4140ACM-1.0/NOPB can replace the MAX6325A only if the system specifically requires a 1.024V reference — the MAX6325A outputs 2.048V, so direct substitution changes the full-scale range of any connected ADC. If scaling allows, replacing MAX6325A with LM4140ACM-1.0/NOPB demands recalculating all gain stages, reference dividers, and calibration coefficients. Additionally, the LM4140ACM-1.0/NOPB has a higher tempco (3ppm/°C vs. 2ppm/°C for MAX6325A) and higher supply current (375µA vs. 35µA), impacting thermal drift and power budgets. Use LM4140ACM-1.0/NOPB only in non-battery-powered, temperature-controlled environments where 1.024V simplifies digital scaling and cost is a factor over ultra-low drift.
What are the reliability risks of using LM4140ACM-1.0/NOPB in industrial environments with temperature fluctuations, and how does its 0°C to 70°C rating affect long-term stability?
The LM4140ACM-1.0/NOPB is rated for 0°C to 70°C ambient temperature (TA), which may pose reliability risks in industrial environments where temperatures exceed 70°C, even if junction temperature is managed. Operating outside the specified range can increase initial offset error and accelerate long-term drift beyond the specified ±0.1%. While the device has excellent 3ppm/°C tempco within range, exceeding 70°C risks parametric shifts, especially when paired with high input voltages (e.g., 5.5V) that increase self-heating. To mitigate this, ensure adequate PCB copper cooling, avoid enclosed spaces, or consider higher-grade alternatives like the LM4140A-1.0 with extended temp options. Also, derate the input voltage at high ambient temps to reduce thermal stress and extend lifetime accuracy.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
LM4140ACM-1.0/NOPB CAD Models
Texas Instruments LM4140ACM-1.0/NOPB PCB symbols & footprints
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