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Name: OPA129UB
Brand: Texas Instruments
SKU: OPA129UB
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 OPA129UB

Part No.:: OPA129UB

Manufacturer:: Texas Instruments

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

Datasheet:: OPA129UB.pdf

Description:: IC OPAMP GP 1 CIRCUIT 8SOIC

In Stock:: 2023

Quantity:: Add To Cart

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OPA129UB Specifications

Package/Case:
8-SOIC (0.154, 3.90mm Width)
Packaging:
Bulk,Tube
Series:
Difet®
ProductStatus:
Obsolete
AmplifierType:
General Purpose
NumberofCircuits:
1
OutputType:
-
SlewRate:
2.5V/µs
GainBandwidthProduct:
1 MHz
-3dbBandwidth:
-
Current-InputBias:
0.03 pA
Voltage-InputOffset:
500 µV
Current-Supply:
1.2mA
Current-Output/Channel:
10 mA
Voltage-SupplySpan(Min):
10 V
Voltage-SupplySpan(Max):
36 V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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OPA129UB information

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OPA129UB Typical application Circuitry

OPA129UB

The OPA129UB is a high-precision operational amplifier (op-amp) known for its ultra-low bias current, high input impedance, and low noise characteristics. It's designed by Texas Instruments and is particularly suited for applications requiring high-accuracy signal amplification with minimal input bias, such as photodiode amplifiers, precision current measurements, and electrochemical sensors.

Key Features of the OPA129UB

- Ultra-Low Bias Current: Ideal for circuits where the input signal source has a high impedance, ensuring minimal signal distortion.

- High Input Impedance: Reduces loading effects by maintaining the integrity of the input signal.

- Low Noise: Reduces signal interference, crucial for sensitive measurement applications.

- Wide Supply Voltage Range: Accommodates a variety of power configurations, enhancing flexibility in system design.

- Stable Performance: Offers reliable operation across a wide range of temperatures and supply voltages, ensuring consistent performance in diverse conditions.

Application Scenario: Photodiode Amplifier for Light Intensity Measurement

A typical application for the OPA129UB is in a photodiode amplifier circuit, where it is used to convert the current output from a photodiode into a voltage signal, enabling precise measurement of light intensity.

Detailed Circuit Connection

1.Photodiode Interface: Connect the anode of a photodiode to ground and its cathode to the inverting input (Pin 2) of the OPA129UB. This reverse-biased configuration is essential for accurately capturing the photodiode's current response to light.

2.Transimpedance Amplification: To convert the photodiode current to a measurable voltage, connect a feedback resistor from the output (Pin 6) to the inverting input (Pin 2). The value of this resistor is crucial, as it determines the gain of the amplifier and thus the sensitivity of the light intensity measurement.

3.Feedback Capacitor for Stability: Add a feedback capacitor in parallel with the feedback resistor to enhance the circuit's stability and bandwidth, addressing the capacitance of the photodiode and preventing oscillations.

4.Power Supply Configuration: Supply power to the OPA129UB by connecting a positive voltage to Pin 7 and a negative voltage to Pin 4. Ensuring a stable and clean power supply is paramount for minimizing operational noise and maximizing the accuracy of light intensity measurements.

5.Signal Filtering and Output: Optionally, implement additional low-pass filtering at the output (Pin 6) to remove high-frequency noise. The filtered output can then be sent to an analog-to-digital converter (ADC) or other later processing stages.

Design Considerations

When designing a photodiode amplifier circuit with the OPA129UB, several critical aspects must be considered:

- Power Supply Purity: Ensure the power supply is free from noise and fluctuations to leverage the low noise feature of the OPA129UB fully.

- Component Precision: To preserve signal stability and accuracy, use premium precision resistors and capacitors in the feedback loop.

- Photodiode Characteristics: Account for the characteristics of the photodiode, such as its dark current and capacitance, to optimize the amplifier design for accurate light measurement.

- Thermal Management: Consider the thermal behavior of the OPA129UB and surrounding components to prevent performance degradation due to temperature variations.

- Signal Path Optimization: Design the signal path from the photodiode through the OPA129UB to the output stage to minimize losses and interference, ensuring high-quality signal processing.

By meticulously addressing these design considerations, engineers can effectively leverage the capabilities of the OPA129UB in creating high-precision photodiode amplifiers, benefiting from its ultra-low bias current, low noise, and high input impedance to achieve superior light intensity measurement performance.

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6. What is the process for return or replacement of OPA129UB?

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 OPA129UB we delivered, we will accept the replacement or return of the OPA129UB 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 OPA129UB.

(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