What is the Additional Feature ?

Name: LM397MF
Brand: Texas Instruments
SKU: LM397MF
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 LM397MF

Part No.:: LM397MF

Manufacturer:: Texas Instruments

Package:: SC-74A, SOT-753

Datasheet:: LM397MF.pdf

Description:: IC COMPARATOR VOLT SGL SOT23-5

In Stock:: 357

Quantity:: Add To Cart

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LM397MF 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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LM397MF information

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LM397MF Typical application Circuitry

LM397MF

LM397MF is a single voltage comparator designed for applications that require a simple and efficient method to compare two voltages and output a digital signal representing the comparison result.

Application Scenarios

A common application for the LM397MF is in battery voltage monitoring systems, where it can be used to compare the battery voltage against a predefined threshold and provide an indication when the battery voltage falls below this threshold, signaling the need for recharge or replacement.

Parameter Features

- Single Supply Operation: The LM397MF is appropriate for battery-operated devices because it can run on a single power source.

- Low Input Offset Voltage: This is essential for precision monitoring applications as it guarantees precise voltage comparison.

- Broad Supply Voltage Range: This feature increases its adaptability to various circuit designs by being compatible with a range of power supply voltages.

- Open-Collector Output: Allows for easy interfacing with other digital logic or driving a relay or LED for indication purposes.

Circuit Connection Example: Battery Voltage Monitoring

Incorporating the LM397MF into a battery voltage monitoring circuit involves several key steps:

- Power Supply Connection: Connect the VCC pin of the LM397MF (pin 5) to a positive power supply, which can be the battery voltage itself if within the IC's operating range.

- Grounding: Attach the GND pin (pin 2) to the system ground. This establishes a common reference point for the voltage comparison.

- Reference Voltage Setup: Apply a precise reference voltage, corresponding to the desired battery voltage threshold, to the non-inverting input (pin 3). This can be achieved using a voltage divider or a precise reference voltage source.

- Battery Voltage Input: Connect the battery voltage, which needs to be monitored, to the inverting input (pin 4) of the LM397MF.

- Output Indication: The open-collector output (pin 1) can be connected to an LED (with a current-limiting resistor) or a digital input of a microcontroller. The LED or microcontroller can then provide a visual or digital indication when the battery voltage falls below the threshold.

Design Considerations

When designing with the LM397MF, it's important to consider the power supply voltage to ensure it's within the IC's operating range. The choice of the reference voltage is crucial, as it sets the threshold for comparison. Additionally, the output configuration needs to be considered, especially if driving a load directly from the open-collector output, which may require an external pull-up resistor. The input impedance and the layout should also be optimized to minimize noise and ensure stable operation.

In summary, the LM397MF is an effective solution for applications like battery voltage monitoring, providing a simple yet reliable method for voltage comparison. By addressing key design aspects such as power supply compatibility, reference voltage accuracy, output configuration, and noise minimization, designers can effectively utilize the LM397MF in their electronic systems.

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6. What is the process for return or replacement of LM397MF?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LM397MF we delivered, we will accept the replacement or return of the LM397MF only when all of the below conditions are fulfilled:

(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 LM397MF.

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

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations