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Home > Products > Integrated Circuits (ICs) > Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps > OPA381AIDGKR
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OPA381AIDGKR

In Stock 3470 pcs Reference Price(In US Dollars)
1+
$0.9873
Manufacturer Part Number:
OPA381AIDGKR
Manufacturer / Brand
Texas Instruments
Part of Description:
IC TRANSIMPEDANCE 1 CIRC 8VSSOP
Datasheets:
OPA381AIDGKR.pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 3470 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
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DHL/Fedex/TNT/UPS

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Part Number OPA381AIDGKR
Manufacturer / Brand Texas Instruments
Stock Quantity 3470 pcs Stock
Category Integrated Circuits (ICs) > Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Description IC TRANSIMPEDANCE 1 CIRC 8VSSOP
Lead Free Status / RoHS Status: ROHS3 Compliant
RFQ OPA381AIDGKR Datasheets OPA381AIDGKR Details PDF
OPA381AIDGKR Details PDF for FR.pdf
OPA381AIDGKR Details PDF for KR.pdf
OPA381AIDGKR Details PDF for IT.pdf
OPA381AIDGKR Details PDF for ES.pdf
OPA381AIDGKR Details PDF for DE.pdf
Voltage - Supply Span (Min) 2.7 V
Voltage - Supply Span (Max) 5.5 V
Voltage - Input Offset 7 µV
Supplier Device Package 8-VSSOP
Slew Rate 12V/µs
Series -
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Package Tape & Reel (TR)
Output Type -
Operating Temperature -40°C ~ 125°C
Number of Circuits 1
Mounting Type Surface Mount
Gain Bandwidth Product 18 MHz
Current - Supply 800µA
Current - Output / Channel 10 mA
Current - Input Bias 3 pA
Base Product Number OPA381
Amplifier Type Transimpedance

Packaging & ESD

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OPA381AIDGKR Product Details:

The OPA381AIDGKR is a transimpedance amplifier manufactured by Luminary Micro/Texas Instruments. It belongs to the integrated circuits (ICs) category, specifically classified as a linear amplifier, operational amplifier (op-amp), and buffer amplifier.

Designed to address various design challenges, the OPA381AIDGKR features a wide operating temperature range of -40°C to 125°C, making it suitable for a variety of applications. It is RoHS-compliant and available in a compact 8-VSSOP (8-TSSOP, 8-MSOP) package, providing efficient space utilization.

Key specifications of the OPA381AIDGKR include a single/dual supply voltage range of 2.7 V to 5.5 V or ±1.35 V to ±2.75 V, a slew rate of 12 V/s, and a gain bandwidth product of 18 MHz. It has a supply current of 800 μA and can deliver an output current of up to 10 mA per channel. The amplifier features a low input bias current of 3 pA and an input offset voltage of 7 μV, ensuring high precision and performance.

The primary advantages of the OPA381AIDGKR include its versatility, low power consumption, and high-speed operation, making it suitable for a wide range of applications. It is commonly used in instrumentation, industrial, and medical equipment, as well as in various sensor and measurement systems.

Regarding compatibility, the OPA381AIDGKR is considered a transimpedance amplifier and may have equivalent or alternative models available from other manufacturers. However, without conducting a detailed market research, it is difficult to provide a comprehensive list of equivalent models. Customers should consult with the manufacturer or authorized distributors to determine the availability of alternative options that may meet their specific requirements.

OPA381AIDGKR Key Technical Attributes

Transimpedance Amplifier Type

Single Circuit Configuration

Slew Rate of 12 V/s

OPA381AIDGKR Packing Size

Package Type: 8-VSSOP, MSOP8

Material: Lead Free / RoHS Compliant

Packaging: Digi-Reel

Operational Temperature Range: -40°C ~ 125°C

Voltage Supply Range: Single 2.7 V ~ 5.5 V, Dual ±1.35 V ~ 2.75 V

OPA381AIDGKR Application

Suitable for precision amplification in instrumentation, sensory equipment, medical electronics, and automatic test equipment applications.

OPA381AIDGKR Features

The OPA381AIDGKR is a high-performance transimpedance amplifier offering a gain bandwidth product of 18MHz and a current supply of 800A. It features a low input bias current of 3pA and an input offset voltage of 7V, making it ideal for handling small signal variations in demanding environments. Other notable characteristics include its robust output current capability of 10mA and its ability to operate efficiently across a wide voltage range.

OPA381AIDGKR Quality and Safety Features

Compliant with RoHS standards ensuring reduced environmental impact and increased safety. It has a Moisture Sensitivity Level (MSL) of 2, indicating it can withstand exposure to moisture for up to 1 year without degradation in quality.

OPA381AIDGKR Compatibility

Designed to integrate seamlessly in systems requiring 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) mount and is efficient for precision tasks across various single or dual supply voltages.

OPA381AIDGKR Datasheet PDF

For the most detailed and authoritative specifications of the OPA381AIDGKR, visit our website and download the datasheet PDF available on the product page. Ensure you are referring to the best source of information to optimize usage.

Quality Distributor

IC-Components is proud to be a premium distributor for Texas Instruments. For purchasing OPA381AIDGKR, we encourage you to get a quote directly on our website where we guarantee competitive pricing and exceptional service. Optimize your sourcing strategy with IC-Components, a trusted name in electronic component distribution.

Frequently Asked Questions

When designing with the OPA381AIDGKR for photodiode signal conditioning, what are the practical implications of its 18MHz gain-bandwidth product (GBW) on achieving high-speed current-to-voltage conversion in an 8-VSSOP package, and what is the maximum transimpedance gain I can realistically achieve without significant bandwidth loss?
The OPA381AIDGKR's 18MHz gain-bandwidth product (GBW) is a critical parameter for transimpedance amplifier (TIA) designs. For a TIA, the effective bandwidth is approximately GBW / (Transimpedance Gain * C_total), where C_total includes the photodiode capacitance and the amplifier's input capacitance. To achieve high-speed operation, you must select a transimpedance gain that keeps this ratio within the 18MHz limit. For example, if your total input capacitance (C_total) is 10pF and you aim for a bandwidth of 1MHz, the maximum transimpedance gain you can use with the OPA381AIDGKR is approximately 180kΩ (18MHz / (1MHz * 10pF)). Exceeding this will result in a lower effective bandwidth than expected.
I'm migrating a design from a legacy transimpedance amplifier to the OPA381AIDGKR. What are the key voltage supply considerations I need to address when switching from a ±5V supply to the OPA381AIDGKR's 2.7V to 5.5V single or ±1.35V to ±2.75V dual supply range, especially concerning output swing and signal integrity for a 10mA output current?
When migrating to the OPA381AIDGKR, ensure your new power supply configuration respects its operating voltage range. The OPA381AIDGKR supports single supplies from 2.7V to 5.5V and dual supplies from ±1.35V to ±2.75V. The maximum output current is 10mA. When operating on a single supply, the output swing will be limited by the supply voltage and ground. For dual supplies, the output swing will be limited by the positive and negative supply rails. Carefully re-evaluate your output signal requirements and ensure they are within the achievable swing for your chosen supply configuration to avoid clipping or distortion.
For an industrial sensor application requiring long-term reliability, what are the practical limitations of the OPA381AIDGKR's -40°C to 125°C operating temperature range, and are there specific environmental factors or driving conditions that could accelerate its degradation or lead to premature failure in an MSOP8 package?
The OPA381AIDGKR's -40°C to 125°C operating temperature range is broad, but long-term reliability in harsh industrial environments demands careful consideration. Operating consistently at the upper temperature limit (125°C) can accelerate component aging mechanisms, potentially reducing its lifespan. High humidity combined with elevated temperatures can also pose risks to exposed circuitry. Ensure proper thermal management; if the device operates near its maximum temperature, consider airflow or heatsinking, even within the MSOP8 package, to mitigate thermal stress and prolong operational life.
I need to select a transimpedance amplifier for a low-light photodetector. What are the trade-offs of using the OPA381AIDGKR with its 3pA input bias current versus amplifiers with significantly lower femtoampere bias currents, especially regarding noise performance and potential signal saturation issues in my system?
The OPA381AIDGKR's 3pA input bias current is excellent for many photodiode applications. However, if your photodetector generates extremely low signal currents (e.g., picoamperes), or if you are using very large feedback resistors to achieve high gain, this bias current can become a significant noise source or lead to DC offset errors. For applications demanding ultimate sensitivity or operating with sub-picoampere signals, amplifiers specifically designed with femtoampere bias currents might be necessary. The trade-off is often a lower GBW or higher cost for those ultra-low bias current devices. Ensure your system's noise budget and desired dynamic range justify the OPA381AIDGKR's bias current.
When integrating the OPA381AIDGKR into a system with a 3.3V digital interface, what are the critical I/O voltage level considerations to prevent damage, and are there specific grounding or decoupling strategies recommended for the 8-TSSOP/8-MSOP (0.118", 3.00mm Width) package to ensure stable operation?
While the OPA381AIDGKR's analog supply can be as low as 2.7V, its inputs and outputs are analog and designed to operate within the specified analog supply rails. Connecting its analog input or output pins directly to a 3.3V digital rail without proper level shifting or isolation could lead to overvoltage conditions and damage, depending on the absolute maximum ratings. Always ensure that the analog input voltage does not exceed the analog supply voltage by more than a small margin (typically VCC + 0.3V or 0.5V, as per datasheet) and that the output voltage is within the analog supply rails. For stable operation in its 8-TSSOP/8-MSOP package, use appropriate decoupling capacitors (e.g., 0.1µF and 1µF) placed as close as possible to the power pins to mitigate noise and voltage transients.
In a scenario where the OPA381AIDGKR is considered as a replacement for an older instrumentation amplifier like the AD620, what are the key design implications regarding its transimpedance amplifier architecture, gain-bandwidth product, and noise characteristics that need to be re-evaluated for an existing board layout in an 8-VSSOP package?
Replacing an instrumentation amplifier (like the AD620) with the OPA381AIDGKR is a fundamental architecture change. The OPA381AIDGKR is a transimpedance amplifier, designed for current-to-voltage conversion, whereas the AD620 is a voltage-input instrumentation amplifier. Direct pin-for-pin replacement is highly unlikely without significant board redesign. Key implications include the need to adapt the input circuitry to handle current signals instead of voltage signals, re-evaluating feedback resistor values to achieve the desired gain, and understanding how the OPA381AIDGKR's 18MHz GBW and 3pA bias current differ from the AD620's specifications. The 8-VSSOP package might be physically compatible, but the surrounding circuitry will need extensive modification.
For a portable medical device powered by a single 3.7V Li-ion battery, can the OPA381AIDGKR be reliably operated in single-supply mode to amplify a low-level photodiode signal, and what specific component selection for the feedback resistor and decoupling strategies are recommended to minimize noise and ensure it meets the 2.7V to 5.5V single supply requirement?
Yes, the OPA381AIDGKR can be reliably operated in single-supply mode from a 3.7V Li-ion battery, as it falls within its 2.7V to 5.5V single supply range. To minimize noise and ensure optimal performance, select a feedback resistor value that balances gain requirements with the 18MHz GBW and the amplifier's input bias current. For instance, if you require a gain of 100kΩ and have a total input capacitance of 5pF, the bandwidth will be approximately 3.18MHz (18MHz / (100kΩ * 5pF)). Ensure thorough decoupling with a 0.1µF ceramic capacitor placed very close to the V+ and GND pins, and potentially a larger tantalum or electrolytic capacitor for bulk filtering at the battery input to mitigate power supply noise.
Considering the OPA381AIDGKR's 7µV input offset voltage, what are the practical implications for applications requiring high precision DC measurements when using it as a transimpedance amplifier, and at what transimpedance gain values does this offset voltage become a significant error source that necessitates error correction techniques?
The OPA381AIDGKR's 7µV input offset voltage, while relatively low for some applications, can become a significant error source in high-precision DC measurements, especially when amplified by a large transimpedance gain. The DC error at the output will be Offset Voltage * Transimpedance Gain. For example, with a transimpedance gain of 1MΩ, the output DC error due to offset voltage would be 7mV. If your application requires accuracy better than this, you will need to consider techniques like offset cancellation circuitry, AC coupling (if the signal is AC-coupled), or selecting an amplifier with a lower offset voltage specification. The threshold where it becomes significant depends entirely on the required accuracy of your specific application.
If I need to replace a faulty OPA381AIDGKR on a densely populated 8-MSOP8 PCB, are there specific component allowances or re-work considerations when soldering this surface-mount device, especially concerning its MSL 2 rating which suggests a 1-year shelf life before exposure, and what are the potential risks if moisture is present during reflow?
Replacing a faulty OPA381AIDGKR on an 8-MSOP8 PCB requires careful handling due to its MSL 2 rating. This rating indicates that the component should be used within one year of being removed from its sealed packaging. If exposed to ambient conditions for longer, it may absorb moisture. If this moisture is present during the reflow soldering process, it can cause delamination, package cracking, or reduced solder joint reliability. Before soldering, if the component has been stored beyond its recommended shelf life or exposed for an extended period, it should be baked according to the manufacturer's recommendations (typically 125°C for a specified time) to drive out absorbed moisture. Use proper ESD precautions during handling.
In a high-voltage isolation application where the OPA381AIDGKR is part of a signal conditioning chain, what are the limitations of its 2.7V to 5.5V supply range, and can it be effectively buffered or interfaced with a system operating on a much higher voltage rail (e.g., 24V) while maintaining signal integrity and avoiding damage, given its 10mA output current capability?
The OPA381AIDGKR's 2.7V to 5.5V supply range strictly limits its operation to low-voltage systems. It cannot directly interface with or be powered by a 24V rail. To bridge this voltage gap, you would need to implement a robust isolation and level-shifting scheme. This would typically involve an optocoupler, a transformer-based isolation amplifier, or a digital isolator paired with a DAC/ADC to convert the analog signal to a digital format, isolate it, and then convert it back on the high-voltage side. The OPA381AIDGKR's 10mA output current is relevant for the low-voltage side of such a system; the isolation circuitry would handle the transfer to the higher voltage domain. Direct connection is not feasible and would result in immediate damage.

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