Part Number: AD202KY

Manufacturer: Analog Devices Inc.


Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of AD202KY

Datasheet  AD202KY datasheet
Category Integrated Circuits (ICs)
Family Linear – Amplifiers – Instrumentation, OP Amps, Buffer Amps
Manufacturer Analog Devices Inc.
Packaging Tube
Part Status Active
Amplifier Type Isolation
Number of Circuits 2
Output Type
Slew Rate
Gain Bandwidth Product 2kHz
-3db Bandwidth
Current – Input Bias 30pA
Voltage – Input Offset 5mV
Current – Supply 5mA
Current – Output / Channel 400μA
Voltage – Supply, Single/Dual (±)
Operating Temperature 0°C ~ 70°C
Mounting Type Through Hole
Package / Case 38-SIP, 10 Leads, Offset Leads
Supplier Device Package 10-SIP


Precision signal measurement and processing have become critical across multiple industries in today’s quickly expanding technology landscape. The transformer-coupled isolation amplifiers AD202 and AD204 provide a versatile solution for applications needing accurate signal isolation, measurement, and transmission without the requirement for a galvanic connection. This detailed reference reveals the AD202KY’s essential features, functions, and application scenarios, providing vital insights for engineers, designers, and fans alike.

Understanding the AD202KY Series

Analog Devices Inc. designed the AD202KY, which is a two-port transformer-coupled isolation amplifier. These amplifiers are specifically developed to meet signal measuring and processing issues in settings where galvanic isolation is critical. The AD202KY shares the core properties of the AD202 series, with the addition of a 15 V dc power source for its power requirements.

Features that Set AD202KY Apart

● Galvanic Isolation

The AD202KY is distinguished by its ability to establish 100% galvanic isolation between the input and output stages. This is accomplished by incorporating internal transformer-coupling technology. This isolation ensures that signals are processed and delivered precisely and without unwanted interference, making it a good choice for applications where signal integrity is critical.

● Compact Design

Both the AD202 and AD204 series are available in small plastic SIP or DIP packaging. The use of a 15 V dc power source distinguishes the AD202KY in particular. This removes the requirement for an external dc-to-dc converter, simplifying the overall design and lowering component prices.

● Flexible and Easy to Use

The AD202KY’s designers prioritized maximum flexibility and ease of use. One significant feature is the presence of an uncommitted op amp on the input stage, which allows engineers to adapt the amplifier to specific application needs. This adaptability increases the amplifier’s versatility across a wide range of applications.

● Impressive Specifications

The AD202KY has a bipolar 5 V output range, adjustable gain from 1V/V to 100 V/V, and a stunning 0.025% maximum nonlinearity (K grade). Furthermore, its outstanding common-mode rejection (CMR) capabilities of 130 dB provides consistent functioning even in loud conditions.

● Low Power Consumption

The AD202KY shines by consuming only 35 mW of power, which is in line with the trend toward energy efficiency. This low power requirement not only adds to lower running expenses, but also makes it an excellent alternative for applications requiring low power consumption.

Applications of the AD202KY

The AD202KY’s adaptability opens the door to a wide range of applications in a variety of industries:

● Industrial Automation

The AD202KY can assist accurate signal processing in tough and electrically noisy situations, which is important in industrial automation where exact measurements and control are critical. Its galvanic isolation protects delicate equipment from potentially harmful electrical disturbances.

● Medical Instrumentation

The medical field demands accurate and reliable signal processing for patient monitoring devices. The AD202KY’s ability to provide isolation between various components ensures that patient safety remains a top priority.

● Telecommunications

Telecommunication systems sometimes entail signal transmission across large distances. The isolation characteristics of the AD202KY help to prevent signal degradation and interference, resulting in improved overall system performance.

● Renewable Energy Systems

Renewable energy sources like sun and wind necessitate accurate signal measurement and conditioning. The flexibility of the AD202KY to work in isolated locations is ideal for ensuring effective energy conversion and management.

Differences Between the AD202 and  AD204

The AD202 and AD204 are both general-purpose, transformer-coupled isolation amplifiers, but they differ in important ways to meet the needs of different applications. The following are the main changes between the AD202 and AD204:

Power Source

  • AD202: The AD202 is powered by a 15 V dc power supply. It includes an inbuilt power supply, which makes it easier to incorporate into systems that have a 15 V dc power source.
  • AD204: The AD204, on the other hand, is powered by an externally supplied clock, such as the AD246 Clock Driver, which is recommended. This design option makes the AD204 more suitable to systems that can use an externally generated clock signal for functioning.

Power Consumption

  • AD202: The AD202’s power consumption may vary based on the application needs and load because it uses a direct 15 V dc supply, although it normally functions in a power-efficient manner.
  • AD204: With a power consumption of about 35 mW, the AD204 is specifically designed to consume little power. Because of its low power consumption, the AD204 is well suited for situations where energy efficiency is a top priority.

Flexibility and Op-Amp Availability

  • On the input stage of both the AD202 and AD204 versions is an uncommitted operational amplifier. This allows customers to adapt the amplifier’s properties to individual application requirements. This op-amp’s availability improves the adaptability and versatility of both versions.

Power Supply and Voltage Considerations

  • AD202: Because it requires a direct 15 V dc power supply, the AD202 is well-suited for situations where a reliable 15 V dc source is readily available or quickly manufactured.
  • AD204: Because the AD204 relies on an externally supplied clock, clock stability and synchronization issues arise. For appropriate AD204 operation, users must verify that the clock driver (e.g., AD246) supplies a reliable clock signal.

Application Scenarios

  • AD202: Because of its direct power supply need and lack of reliance on an external clock, the AD202 is generally chosen for applications requiring isolation amplification and a reliable power source.
  • AD204: Because the AD204 is dependent on an externally supplied clock, it is better suited for applications where clock synchronization is advantageous or power efficiency is crucial.

In summary, while both the AD202 and AD204 are transformer-coupled isolation amplifiers with galvanic isolation capabilities, their power sources, power consumption, and design concerns distinguish them. Engineers and designers should carefully assess their individual application requirements to determine which model, AD202 or AD204, best meets their objectives.


In the ever-evolving landscape of signal measurement and processing, the AD202KY emerges as a powerful solution that combines galvanic isolation, compact design, flexibility, and impressive specifications. Its application versatility spans industrial automation, medical instrumentation, telecommunications, and renewable energy systems, among others.

With the AD202KY, engineers and designers can confidently tackle signal isolation challenges and pave the way for enhanced system performance and reliability. For a deeper understanding and to secure your own AD202KY, reach out to ICRFQ—an esteemed trailblazer among electronic component distributors in China. Our commitment ensures you access this innovation at an affordable price.

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