Dual channel 16 bit 125MSPS analog-to-digital converter GX9236 benchmarking AD9268 applied in smart antenna system

Smart antenna is a bidirectional antenna installed at the base station site, which obtains directionality through a set of fixed antenna units with programmable electronic phase relationships and can simultaneously obtain the directional characteristics of various links between the base station and the mobile station. The system performance relies on "high-precision synchronous acquisition of multi-channel signals" - it is necessary to simultaneously capture 4-16 RF signals, accurately analyze signal amplitude and phase characteristics, and provide raw data support for beamforming algorithms.

However, the signal acquisition of smart antenna systems requires multi-channel synchronization, wide dynamic range, and high integration adaptability. The GXSC dual channel 16 bit 125MSPS analog-to-digital converter GX9236 is very suitable for the application scenarios of smart antenna systems. Each channel ADC core adopts a multi-level, differential pipeline architecture and integrates output error correction logic. Each ADC has a wide bandwidth, differential sample and hold analog input amplifier, and supports various input ranges that users can choose from. Product advantages

Package size, compatible with model AD9268 for functionality

Low power consumption, no need for heat sink

Optional on-chip disturbance

Programmable ADC internal reference voltage source

Single power supply 1.8 V power supply

Flexible analog input range: 1Vpp to 2VpP

Flexible energy-saving power down mode

The output data of GX9236 can be directly sent to two external 16 bit output ports, which can be set to 1.8V CMOS or LVDS. When needed, flexible power-off options can significantly reduce power consumption, and programming for settings and control is accomplished using a three wire SPI compatible serial interface. According to application requirements and different scenarios, GX9236 can provide different speed gear product series of 60M/80M/105M/125M, achieving flexible power consumption control and gear recognition through speed level registers.

Main features of GX9236:

• Built in dual channel 125MSPS

Low power consumption, no need for a heat sink

• Optional on-chip disturbance

Programmable ADC internal reference voltage source

• Integrated ADC sampling and holding input

Single power supply 1.8V power supply

1.8VCMOS/LVDS output

Flexible analog input range: 1Vpp to 2Vpp

• Serial port control

• Flexible energy-saving power down mode