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Name: LM4040A25IDBZR
Brand: Texas Instruments
SKU: LM4040A25IDBZR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments LM4040A25IDBZR

Part No.:: LM4040A25IDBZR

Manufacturer:: Texas Instruments

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: LM4040A25IDBZR.pdf

Description:: IC VREF SHUNT 0.1% SOT23-3

In Stock:: 2262

Quantity:: Add To Cart

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LM4040A25IDBZR Specifications

Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®,Bulk
Series:
-
ProductStatus:
Active
ReferenceType:
Shunt
OutputType:
Fixed
Voltage-Output(Min/Fixed):
2.5V
Voltage-Output(Max):
-
Current-Output:
15 mA
Tolerance:
±0.1%
TemperatureCoefficient:
100ppm/°C
Noise-01Hzto10Hz:
-
Noise-10Hzto10kHz:
35µVrms
Voltage-Input:
-
Current-Supply:
-
Current-Cathode:
80 µA
OperatingTemperature:
-40°C ~ 85°C (TA)
MountingType:
Surface Mount

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LM4040A25IDBZR information

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LM4040A25IDBZR Typical application Circuitry

LM4040A25IDBZR

The LM4040A25IDBZR is a precision, shunt-mode voltage reference chip. With its excellent accuracy and stability, it produces a fixed voltage output that is perfect for use in reference voltage applications.

Applications: This chip is commonly used in applications such as power supply monitoring, battery-operated devices, data acquisition systems, and instrumentation where a stable reference voltage is crucial.

Parameters: Key features of the LM4040A25IDBZR include a fixed output voltage of 2.5V, low temperature coefficient, low dynamic impedance, and wide operating current range. It also provides low noise performance and outstanding long term stability.

Circuit Design for a Typical Application

Let's consider designing a simple voltage reference circuit for a data acquisition system using the LM4040A25IDBZR chip.

1. Voltage Reference Selection: Choose the LM4040A25IDBZR for its 2.5V output, which is suitable for many analog-to-digital converters (ADCs) as a reference voltage.

2. Power Supply Connection: Connect the anode of the LM4040A25IDBZR (pin 1) to the ground of the circuit. This is a critical step as the device operates in a shunt mode.

3. Output Voltage Connection: Connect the cathode of the LM4040A25IDBZR (pin 2) to the positive input of the ADC or any other component requiring a reference voltage. This pin provides the stable 2.5V output.

4. Bypass Capacitor: Place a bypass capacitor (C1) between the cathode of the LM4040A25IDBZR and ground to filter out any noise and ensure stability. A value of 0.1µF to 1µF is typically sufficient.

5. Current Limiting Resistor: Connect a resistor (R1) in series with the LM4040A25IDBZR to limit the current through the device. The value of R1 depends on the input voltage and the desired operating current. For example, if the input voltage is 5V and the desired current is 1mA, R1 would be calculated as (5V - 2.5V) / 1mA = 2.5kΩ.

Design Considerations

- Operating Current: Ensure that the operating current through the LM4040A25IDBZR is within the specified range for optimal performance and stability.

- Thermal Considerations: Manage heat dissipation, especially in high-current applications, to maintain accuracy and prevent thermal drift.

- Input Voltage: The input voltage should be sufficiently higher than the output voltage to ensure proper operation but within the maximum specified limit to avoid damage.

- Noise Filtering: Use appropriate bypass capacitors to minimize noise and ripple on the reference voltage.

You can use the LM4040A25IDBZR chip in your voltage reference design to ensure precise and steady performance by carefully following these guidelines and taking your application's requirements into account.

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

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