What is the Additional Feature ?

Name: LM397MFX/NOPB
Brand: Texas Instruments
SKU: LM397MFX/NOPB
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 LM397MFX/NOPB

Part No.:: LM397MFX/NOPB

Manufacturer:: Texas Instruments

Package:: SC-74A, SOT-753

Datasheet:: LM397MFX/NOPB.pdf

Description:: IC COMPARATOR VOLT SGL SOT23-5

In Stock:: 186

Quantity:: Add To Cart

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LM397MFX/NOPB Specifications

Package/Case:
SC-74A, SOT-753
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
Type:
General Purpose
NumberofElements:
1
OutputType:
CMOS, Open-Collector, TTL
Voltage-SupplySingle/Dual(±):
5V ~ 30V, ±2.5V ~ 15V
Voltage-InputOffset(Max):
7mV @ 30V
Current-InputBias(Max):
0.25µA @ 5V
Current-Output(Typ):
13mA @ 5V
Current-Quiescent(Max):
2mA
CMRRPSRR(Typ):
-
PropagationDelay(Max):
940µs
Hysteresis:
-
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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LM397MFX/NOPB information

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LM397MFX/NOPB Typical application Circuitry

LM397MFX NOPB

The LM397MFX/NOPB is a single voltage comparator designed for applications requiring a simple, cost-effective solution for comparing voltages to determine the larger of two inputs. It is widely used in applications such as battery chargers, switch-mode power supplies, and general signal detection where a decision needs to be made based on the comparison of two voltages.

Application Scenario: Battery Charge Level Indicator

A common application for the LM397MFX/NOPB is in a battery charge level indicator circuit, where it can be used to monitor the voltage level of a battery and indicate whether the battery is above or below a certain voltage threshold.

Detailed Circuit Connection for Battery Charge Level Indicator

To use the LM397MFX/NOPB in a battery charge level indicator, the following detailed connections should be made:

- Voltage Reference Connection: Connect a stable voltage reference to pin 3 (Non-Inverting Input) of the LM397MFX/NOPB. The threshold value that the battery voltage is measured against is established by this reference voltage.

- Battery Voltage Input: Connect the battery voltage (through a voltage divider if necessary to scale the voltage) to pin 2 (Inverting Input) of the LM397MFX/NOPB. This allows the comparator to monitor the battery voltage.

- Output Indicator: Connect pin 1 (Output) of the LM397MFX/NOPB to an LED (or other visual/audible indicator) through a current-limiting resistor. Depending on whether the battery voltage is above or below the threshold, the output will go high or low, turning on or off the LED.

- Power Supply and Grounding: Connect the positive supply voltage to pin 5 (Vcc) and the ground to pin 4 (GND) of the LM397MFX/NOPB.Make that the supplied voltage is within the LM397MFX/NOPB's designated operating range.

Design Considerations

When designing a circuit with the LM397MFX/NOPB, several important factors should be considered:

- Hysteresis Addition: To prevent rapid switching near the threshold voltage due to noise or small voltage fluctuations, add hysteresis to the comparator circuit.Refeeding a tiny percentage of the output voltage to the non-inverting input will accomplish this.

- Input Voltage Range: Ensure that the input voltages at the inverting and non-inverting inputs are within the common-mode range specified for the LM397MFX/NOPB.

- Power Supply Decoupling: Place a decoupling capacitor close to the LM397MFX/NOPB's power supply pins to filter out noise and provide a stable operating environment for the comparator.

- Load Considerations: The output of the LM397MFX/NOPB may need to drive a load (such as an LED indicator). Ensure that the output current does not exceed the maximum specified for the LM397MFX/NOPB, and use an appropriate current-limiting resistor for LEDs.

By carefully implementing these design considerations and understanding the specific connections required for the battery charge level indicator application, the LM397MFX/NOPB can be effectively utilized to provide a simple and reliable indication of battery status.

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6. What is the process for return or replacement of LM397MFX/NOPB?

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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.

(2)We are informed of the defect described above within 90 days after the delivery of LM397MFX/NOPB.

(3)The PartNo is unused and only in the original unpacked packaging.

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