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LM4040A50IDBZR
Texas Instruments
IC VREF SHUNT 0.1% SOT23-3
999302 Pcs New Original In Stock
Shunt Voltage Reference IC Fixed 5V V ±0.1% 15 mA SOT-23-3
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5.0 / 5.0
- (174 Ratings)
LM4040A50IDBZR
Product Overview
1311586
DiGi Electronics Part Number
LM4040A50IDBZR-DGManufacturer
Texas Instruments
LM4040A50IDBZR
Description
IC VREF SHUNT 0.1% SOT23-3Inventory
999302 Pcs New Original In Stock
Shunt Voltage Reference IC Fixed 5V V ±0.1% 15 mA SOT-23-3
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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LM4040A50IDBZR Technical Specifications
Category
Power Management (PMIC), Voltage Reference
Packaging
Cut Tape (CT) & Digi-Reel®
Series
-
Product Status
Active
Reference Type
Shunt
Output Type
Fixed
Voltage - Output (Min/Fixed)
5V
Current - Output
15 mA
Tolerance
±0.1%
Temperature Coefficient
100ppm/°C
Noise - 0.1Hz to 10Hz
-
Noise - 10Hz to 10kHz
80µVrms
Voltage - Input
-
Current - Supply
-
Current - Cathode
95 µA
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
TO-236-3, SC-59, SOT-23-3
Supplier Device Package
SOT-23-3
Base Product Number
LM4040
Datasheet & Documents
Manufacturer Product Page
LM4040A50IDBZR Specifications
HTML Datasheet
LM4040A50IDBZR-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
-296-20865-1
-LM4040A50IDBZRG4
296-20865-1
296-20865-2
LM4040A50IDBZRG4-DG
-LM4040A50IDBZR-NDR
-LM4040A50IDBZRG4-NDR
296-20865-6
-296-20865-1-DG
LM4040A50IDBZRG4
Standard Package
3,000
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
Très satisfait de la rapidité d'expédition, tout s'est déroulé sans souci.
de desembre 02, 2025
The packaging materials used were durable and well-sealed for maximum security.
de desembre 02, 2025
The support team at DiGi Electronics goes above and beyond to assist with any concerns, making shopping hassle-free.
de desembre 02, 2025
The transparent pricing policy builds trust and loyalty.
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Frequently Asked Questions (FAQ)
What are the key design risks when using the LM4040A50IDBZR as a precision voltage reference in a high-temperature industrial environment, and how can they be mitigated?
The LM4040A50IDBZR has a temperature coefficient of 100 ppm/°C, which means its output can drift by up to 50 mV over its full operating range (-40°C to 85°C). In high-temperature industrial applications, this drift can compromise measurement accuracy in ADCs or DACs. To mitigate this, ensure adequate thermal management, avoid placing the device near heat-generating components, and consider using a temperature-compensated layout with a copper pour for heat dissipation. Additionally, calibrate the system at operating temperature if absolute accuracy is critical, or evaluate lower-drift alternatives like the REF5050 (3 ppm/°C) if the LM4040A50IDBZR’s drift exceeds system tolerances.
Can the LM4040A50IDBZR be safely used as a drop-in replacement for the MAX6025A in a 5V shunt reference application, and what design changes might be needed?
While both the LM4040A50IDBZR and MAX6025A provide a 5.0V fixed shunt reference, direct replacement requires careful evaluation. The MAX6025A has a lower typical operating current (60 µA vs. 95 µA for the LM4040A50IDBZR) and better noise performance (40 µVrms vs. 80 µVrms), so replacing it may increase power consumption and noise in sensitive analog circuits. Additionally, verify that your bias resistor is sized correctly—since the LM4040A50IDBZR requires a minimum cathode current of 95 µA, the existing resistor may need adjustment to ensure proper regulation. Always revalidate stability and accuracy in your specific circuit before full deployment.
What are the reliability implications of operating the LM4040A50IDBZR near its maximum cathode current of 15 mA in a continuous-duty application?
Operating the LM4040A50IDBZR continuously at or near its 15 mA maximum cathode current increases power dissipation (up to 75 mW at 5V), which can elevate junction temperature and accelerate long-term degradation. Although the device is rated for this current, sustained high current reduces reliability and may shift output voltage over time due to thermal stress. For improved longevity, derate the current to ≤10 mA and ensure good PCB thermal conductivity. If higher current is unavoidable, consider a series resistor with a heatsink or evaluate higher-power references like the LM4041CDE with better thermal performance in SOT-23 packages.
How does the noise performance of the LM4040A50IDBZR impact its suitability for low-noise sensor signal conditioning circuits, and what filtering strategies are recommended?
With a noise specification of 80 µVrms from 10 Hz to 10 kHz, the LM4040A50IDBZR is not ideal for ultra-low-noise applications such as precision strain gauge or thermocouple amplifiers. This noise level can dominate the signal chain in high-resolution systems (e.g., 16-bit+ ADCs). To mitigate this, add a low-pass RC filter at the reference output (e.g., 1 kΩ + 1 µF ceramic capacitor) to attenuate high-frequency noise, and use a separate, low-noise LDO to power the reference if possible. For critical applications, consider replacing it with a lower-noise alternative like the ADR4550 (3.5 µVrms), though this may require a different package and bias configuration.
What layout and PCB design practices are critical when integrating the LM4040A50IDBZR into a mixed-signal system to avoid ground noise coupling and ensure reference stability?
The LM4040A50IDBZR’s performance is highly sensitive to PCB layout due to its shunt configuration and small SOT-23-3 package. To prevent ground noise coupling, connect its cathode directly to a clean analog ground plane using a short, wide trace, and avoid routing digital return currents beneath it. Place the bias resistor as close as possible to the cathode pin to minimize parasitic inductance. Also, use a local decoupling capacitor (100 nF ceramic) between cathode and ground, even though it’s a shunt device, to stabilize transient response. Never share the reference ground path with high-current digital loads—use a star grounding strategy to preserve accuracy in mixed-signal designs.
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.
LM4040A50IDBZR CAD Models
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