Thefollowingparagraphsdescribethefunctionoftheindividualcircuits.Seethedatasheetfordeviceoperatingcharacteristics.

3.1.3Clock Inputs

The EVM provides separate inputs for the ADC clock and output buffer clock. This allows the user to send a modified version of the ADC clock (inverted, delayed, etc.) with the output data to generate the required setup and hold times for the user interface. The ADC clock input is SMA connector J3 and has provisions for serial and/or parallel termination. The buffered output clock input is SMA connector J4 and has provisions for serial and/or parallel termination. The clock inputs must be 50-Ω square wave signals, 1.8-V or 3.3-V referenced to ground, with a duty cycle of 50 ± 5%. The EVM can operate with only one clock input by installing R43 and R44, and removing R41 and R8 to prevent double termination.

3.1.4Control Inputs

The ADC has three discrete inputs to control the operation of the device.

3.1.4.1Standby

With jumper W4 installed between pins 2 and 3, the ADC is in power-down mode. The device is in operate mode with jumper W4 installed between pin 1 and pin 2.

3.1.4.2Output Enable

With jumper W5 installed between pins 1 and 2, the ADC data outputs are in a 3-state mode. The data outputs are enabled with jumper W5 installed between pins 2 and 3.

3.1.4.3Power Down Reference

With jumper W6 installed between pins 1 and 2, the ADC internal reference is disabled and the device is in external reference mode. The ADC is in internal reference mode with jumper W6 installed between pins 2 and 3.

3.1.5Power

Power is supplied to the EVM via banana jack sockets. A separate connection is provided for a 1.8-V analog supply (J6 and J5), a 1.8-V digital supply (J9 and J10), a 1.8/3.3-V digital driver supply (J13 and J14), and a ± 5-V analog supply (J7, J8, and J11).

3.1.6Outputs

The data outputs from the ADC are buffered using a SN74AVC16244 before going to header J15. The ADC and output buffer can provide 1.8-V or 3.3-V output levels. The voltage placed at the driver power inputs (J13 and J14) selects this. J15 is a standard 40-pin header on a 100-mil grid, and allows easy connection to a logic analyzer. The connector pin out is listed in Table 3–2.

Circuit Description

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Texas Instruments ADS5103 EVM, ADS5102 EVM manual Clock Inputs
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ADS5103 EVM, ADS5102 EVM specifications

Texas Instruments is known for its innovation in analog and embedded processing technologies, and the ADS5102 and ADS5103 Evaluation Modules (EVM) exemplify this legacy. These high-performance data converters are designed to meet the needs of a wide range of applications in industrial, medical, and communication systems.

The ADS5102 and ADS5103 EVMs are equipped with high-speed analog-to-digital converters (ADCs) that boast impressive specifications. The ADS5102 features a 12-bit resolution, while the ADS5103 pushes boundaries further with 14-bit resolution, ensuring exceptional accuracy in signal conversion. Operating at a sampling rate of up to 250 MSPS, both modules enable the processing of high-frequency signals with minimal latency. This makes them ideal for applications that require real-time data acquisition and processing.

A standout feature of both EVMs is their Error Vector Magnitude (EVM) performance, which allows for low distortion and high linearity in signal processing. This characteristic is critical for applications such as communications, where signal integrity is paramount. The combination of high bit resolution and low EVM makes these devices a natural choice for advanced systems requiring clear and accurate signal representation.

Technology-wise, the EVMs utilize a high-speed deserializer for efficient transmission of data. This feature supports advanced communication protocols, enabling seamless integration with digital signal processors (DSPs) or FPGAs. The design includes flexible input options, allowing users to connect various analog sources and easily adapt the systems to different use cases.

The ADS5102 and ADS5103 EVMs also provide comprehensive software support, including TI’s high-performance software libraries. This enables users to quickly set up their evaluation environment and perform thorough testing and analysis. In addition, the modular design of the EVMs allows for easy upgrades and modifications, making them versatile tools for engineers.

In summary, the Texas Instruments ADS5102 and ADS5103 EVMs are powerful evaluation tools for high-speed, high-resolution data conversion. With their exceptional sampling rates, low distortion, and user-friendly design, they serve as vital components in the development of advanced signal processing systems across various industries. These EVMs not only demonstrate Texas Instruments' commitment to quality and innovation but also provide engineers with the essential tools needed to drive their designs forward.
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