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Name: LM2904DGKR
Brand: Rohm Semiconductor
SKU: LM2904DGKR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Rohm Semiconductor LM2904DGKR

Part No.:: LM2904DGKR

Manufacturer:: Rohm Semiconductor

Package:: 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Datasheet:: LM2904DGKR.pdf

Description:: IC OPAMP GP 2 CIRCUIT 8TSSOP

In Stock:: 3245

Quantity:: Add To Cart

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LM2904DGKR Specifications

Package/Case:
8-TSSOP, 8-MSOP (0.118, 3.00mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
Trophy
ProductStatus:
Active
AmplifierType:
General Purpose
NumberofCircuits:
2
OutputType:
-
SlewRate:
0.3V/µs
GainBandwidthProduct:
700 kHz
-3dbBandwidth:
-
Current-InputBias:
20 nA
Voltage-InputOffset:
3 mV
Current-Supply:
1mA
Current-Output/Channel:
40 mA
Voltage-SupplySpan(Min):
3 V
Voltage-SupplySpan(Max):
26 V
OperatingTemperature:
-40°C ~ 125°C
MountingType:
Surface Mount

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LM2904DGKR information

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LM2904DGKR Typical application Circuitry

LM2904DGKR

LM2904DGKR is a dual operational amplifier (op-amp) designed for general-purpose applications, known for its low power consumption and wide supply voltage range.

Applications:

LM2904DGKR is utilized in scenarios such as audio processing, active filters, voltage followers, comparators, and other circuits requiring one or more op-amps. Its low power characteristics make it ideal for portable and battery-operated devices.

Key Parameters and Features:

- Dual Op-Amp Configuration: Offers two operational amplifiers in a single package, enhancing compactness and integration.

- Broad Supply Voltage Range: This device is adaptable to a variety of applications because to its wide supply voltage range, which allows for single-supply operations.

- Low Power Consumption: Ideal for power-sensitive applications.

- Wide Input Common-Mode Voltage Range: Allows for a broad range of input signals.

Application Scenario: Active Low-Pass Filter

An active low-pass filter using the LM2904DGKR can be designed to condition analog signals, such as filtering out high-frequency noise from a sensor output before analog-to-digital conversion.

Circuit Design Considerations:

1. Supply Voltage Connection: The V+ (Pin 8) should be connected to the positive supply voltage, and V− (Pin 4) to the ground or negative supply voltage, respecting the LM2904DGKR's wide supply voltage range capability.

2. Input Signal Connection: The non-inverting input of the first op-amp (Pin 3) serves as the signal input for the filter. This design assumes a single-ended input where the signal source is referenced to ground.

3. Feedback and Filter Components:

- The output (Pin 1) and the inverting input (Pin 2) of the first op-amp are connected to a feedback resistor (Rf).

- A capacitor (Cf) is placed in parallel with Rf to determine the filter's cutoff frequency. The combination of Rf and Cf creates the low-pass filter characteristic.

4. Grounding: The non-used inverting input (Pin 2) should be properly grounded to prevent it from picking up noise.

5. Output Connection: The output of the first op-amp (Pin 1) provides the filtered signal. This output can be utilized to drive subsequent stages or connected to an analog-to-digital converter.

6. Bypass Capacitors: Placing bypass capacitors close to the V+ and V− pins is recommended to stabilize the supply voltage and reduce noise.

Design Challenges:

- Stability and Bandwidth: The selection of Rf and Cf must be carefully balanced to achieve the desired cutoff frequency while maintaining stability and avoiding undesired oscillations.

- Power Supply Rejection Ratio (PSRR): Fluctuations in the supply voltage can affect the op-amp's performance. Appropriate decoupling and a steady power source can lessen these impacts.

- Input Bias Current: The LM2904DGKR's input bias current, though low, can introduce errors in high-impedance circuits and must be considered in the design.

When designing with the LM2904DGKR, understanding its operational characteristics and how they interact with the rest of the circuit is crucial. Proper component selection, circuit layout, and consideration of the op-amp's limitations are key factors in leveraging its capabilities for efficient and reliable circuit design.

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6. What is the process for return or replacement of LM2904DGKR?

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 LM2904DGKR we delivered, we will accept the replacement or return of the LM2904DGKR 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 LM2904DGKR.

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

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations