AD9211-250EBZ

The AD9211-250EBZ is a complete high-speed analog-to-digital converter (ADC) evaluation board from Analog Devices. It is designed to demonstrate the features and performance of the AD9211 250 MSPS, 14-bit single-channel ADC for wireless base station receivers and other communications systems.

AD9211-250EBZ includes the AD9211 analog-to-digital converter, a pulse detector, level shifter/limiter, baseband filter, and a sample-and-hold device. The pulse detector allows the AD9211 to directly convert the differential pulse-shaped receive signal to a digital one, without needing an external antialiasing filter. The low-cost level shifter/limiter is suitable for wideband applications, and operates with supplies from either 3.3 V or 5 V. The on-board filter is a two-pole, fourth-order passive Sallen-Key filter with a cutoff frequency of 15 GHz. This bandwidth covers the receive signals used in most base station receivers, and provides additional response control.

The AD9211-250EBZ is ideal for applications such as wireless base station receivers, 4G/5G mobile infrastructure systems, FTTX optical networks, and wireless communication systems. The AD9211-250EBZ features a full-scale output of 250 MSPS data rate, and is capable of data rates up to 700 MSPS. It has excellent linearity and low distortion, and supports power-down/deep-sleep modes for increased power efficiency. The board has a small form factor, and is designed to fit into existing systems with minimal board space.

The AD9211-250EBZ works by converting the analog input signal into a time-sampled digital signal that can be stored and processed by digital systems. The board consists of an input signal connector, a pulse detector, a level shifter/limiter, an active filter, a sample-and-hold device, and the AD9211-250EBZ analog-to-digital converter. The input signal connector is a coaxial connector that can be used to connect a differential input signal to the board. The signal is then sent to the pulse detector, which detects any pulse shape and amplifies the signal. The filtered signal is then sent to the level shifter/limiter, which limits the signal levels to a pre-defined range. The signal is then sent to the active filter, which filters out any unwanted frequencies. Finally, the signal is sent to the sample-and-hold device, and then to the AD9211-250EBZ analog-to-digital converter, which converts the signal to a digital format.

The AD9211-250EBZ is a cost-effective solution for high-speed analog-to-digital conversion. It features excellent linearity and low distortion, while providing a full-scale output of 250 MSPS data rate and power efficiency. The small form factor makes it ideal for space-constrained applications, such as base station receivers and 4G/5G mobile infrastructure systems.