The high-speed analog-to-digital converter AD9689 is applied in phased array radar

Phased array radar, as an advanced radar system with outstanding performance, operates on a significantly different principle compared to traditional radar. Traditional radar relies on mechanically rotating the antenna to achieve beam scanning, while phased array radar functions like a fly‘s compound eye—composed of numerous small antenna elements arranged in an array. It enables flexible beam scanning through sophisticated phase control technology, eliminating the need for mechanical rotation.

High-performance analog-to-digital converters (ADCs) in phased array radar systems are responsible for accurately converting the analog signals received by the radar into digital signals for subsequent signal processing and analysis. The GXSC high-speed ADC, with its high sampling rate, high resolution, and outstanding dynamic performance, significantly enhances the target detection, tracking, and identification capabilities of phased array radar. This enables the system to capture target signals more accurately in complex environments, allowing phased array radar to fully leverage its advantages in both modern military and civilian applications.

The GXSC dual-channel 14-bit 2.6 GSPS analog-to-digital converter integrates two independent high-performance ADC cores. This device features an on-chip buffer designed to support communication applications requiring direct sampling of broadband analog signals up to 5 GHz. It offers advantages such as wide input bandwidth, high sampling rate, excellent linearity, small footprint, and low power consumption. The dual-channel ADC core adopts a multi-stage pipeline architecture and incorporates on-chip digital correction algorithms. Each ADC has a broadband input and supports various user-selectable input ranges. The integrated reference voltage source simplifies design complexity. Analog inputs and clock signals are differential inputs. The device is now widely used in applications such as communication receivers, electronic test and measurement systems, phased array radar, and electronic warfare.

The GXSC analog-to-digital converter also features several functions to simplify communication receiver automatic gain control. A programmable threshold detector allows monitoring of incoming signal power using fast detection control bits in the ADC registers. In addition to fast detection output, the device provides signal monitoring capabilities. The signal monitoring module offers additional information about the signal digitized by the ADC, enabling users to configure the JESD204B subclass 1 high-speed serial output into various channel modes, including single-channel, dual-channel, quad-channel, and octal-channel modes, based on data configuration and the acceptable channel data rate of the receiving logic device. The ADC supports multi-device synchronization via SYSREF+ and SYNCINB± input pins.

The GXSC analog-to-digital converter features a flexible power-down mode, enabling various low-power operation modes. All these functions can be programmed using a 3-wire serial port interface (SPI).

GXSC Analog-to-Digital Converter Product Advantages:

Packaging dimensions compatible with reference models, supporting functional replacement of AD9689

The power consumption is approximately 60% of that of the reference chip, effectively reducing the overall power consumption of the system solution

Wide operating temperature range of -55°C to +105°C with robust performance within the operational range

Plastic-encapsulated FCBGA196 small footprint package effectively reduces system volume