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Name: LMH6643MAX
Brand: Texas Instruments
SKU: LMH6643MAX
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 LMH6643MAX

Part No.:: LMH6643MAX

Manufacturer:: Texas Instruments

Package:: 8-SOIC (0.154, 3.90mm Width)

Datasheet:: LMH6643MAX.pdf

Description:: IC VOLTAGE FEEDBACK 2 CIRC 8SOIC

In Stock:: 2016

Quantity:: Add To Cart

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LMH6643MAX Specifications

Package/Case:
8-SOIC (0.154, 3.90mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®,Bulk
Series:
LMH®
ProductStatus:
Obsolete
AmplifierType:
Voltage Feedback
NumberofCircuits:
2
OutputType:
Rail-to-Rail
SlewRate:
135V/µs
GainBandwidthProduct:
-
-3dbBandwidth:
130 MHz
Current-InputBias:
1.6 µA
Voltage-InputOffset:
1 mV
Current-Supply:
2.7mA (x2 Channels)
Current-Output/Channel:
75 mA
Voltage-SupplySpan(Min):
2.7 V
Voltage-SupplySpan(Max):
12.8 V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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LMH6643MAX information

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LMH6643MAX Typical application Circuitry

LMH6643MAX

LMH6643MAX is a low-power, rail-to-rail output operational amplifier from Texas Instruments, known for its high speed and performance. This op-amp is designed to operate with a single or dual supply voltage, making it versatile for a wide range of applications.

Application Scenarios

The LMH6643MAX finds its applications in:

- Active Filters: For signal conditioning in communication systems.

- ADC Buffer: Improving the performance of analog-to-digital converters.

- Portable Devices: Due to its low power consumption, it's ideal for battery-operated devices.

- Audio Applications: Its rail-to-rail output makes it suitable for audio pre-amplification.

Key Features

The standout features of the LMH6643MAX include:

- Rail-to-Rail Output: Provides maximum dynamic range, especially useful in low-voltage applications.

- Low Power Consumption: Makes it suitable for portable, battery-operated devices.

- High Slew Rate: Ensures fast response times, beneficial in high-speed signal processing.

- Wide Supply Voltage Range: Can operate from 2.7V to 12V, accommodating various circuit designs.

Example Application: Audio Pre-Amplifier Circuit

Power Supply Connection: Connect a +5V power supply to the V+ pin (pin 8) and ground to the V- pin (pin 4) of the LMH6643MAX. This setup ensures optimal performance within the op-amp's operating voltage range.

Input Coupling: Attach the audio input signal to the non-inverting input (pin 3) through a coupling capacitor. This capacitor blocks DC offsets in the input signal, preventing them from affecting the op-amp's operation.

Feedback Loop: Establish a feedback loop from the output (pin 1) to the inverting input (pin 2) using a resistor network. This network sets the gain of the amplifier. For example, a 10kΩ resistor from pin 1 to pin 2, and another 10kΩ resistor from pin 2 to ground, would set a gain of 2.

Bypass Capacitor: Place a 0.1µF bypass capacitor close to the V+ pin to filter out noise from the power supply, ensuring clean operation of the LMH6643MAX.

Output Coupling: Use a coupling capacitor at the output (pin 1) to block any DC component from reaching the subsequent stage, preserving the integrity of the audio signal.

Design Considerations

When designing with the LMH6643MAX, consider the following:

- Power Supply Rejection Ratio (PSRR): Ensure a clean and stable power supply to minimize noise in the output signal.

- Load Impedance: The LMH6643MAX is capable of driving loads as low as 2kΩ. Ensure the load impedance is within this range to avoid distortion.

- Stability: Incorporate appropriate compensation techniques if the circuit exhibits oscillatory behavior, especially at higher gains or with capacitive loads.

- Thermal Considerations: Although the LMH6643MAX is designed for low power consumption, always consider thermal issues in tightly packed or high-temperature environments.

Incorporating the LMH6643MAX into an audio pre-amplifier circuit involves careful consideration of the signal path, power supply stability, and component selection to achieve the best performance and sound quality.

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6. What is the process for return or replacement of LMH6643MAX?

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 LMH6643MAX we delivered, we will accept the replacement or return of the LMH6643MAX 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 LMH6643MAX.

(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