GXSC Analog-to-Digital Converter Replaces EV10AQ190A in Lidar Applications

Lidar (Light Detection and Ranging) technology finds extensive application in autonomous driving, environmental monitoring, 3D mapping, and other fields. By emitting laser beams and receiving echo signals, it enables precise measurement of target distance, azimuth, velocity, and other parameters. Particularly in autonomous driving scenarios, it must handle high-speed moving targets, complex environmental interference, and high-resolution imaging demands.

The lidar signal processing chain must perform high-speed capture, precise conversion, and efficient transmission of analog echo signals. Since emitted laser pulses typically have nanosecond-level widths, ultra-high-sampling-rate ADCs are essential for fully capturing the pulse waveform. GXSC‘s four-channel 10-bit 1.25/2.5/5GSPS high-speed ADC product employs a proprietary architecture, achieving excellent dynamic performance with low power consumption below 3.2W. Widely applied across numerous fields, its high sampling rate enables rapid and precise signal acquisition.

This GXSC ADC integrates four 10-bit 1.25GSPS high-speed ADCs, each with an independent DDR data clock. When multiple ADCs are active, any single data clock can be selected to simultaneously acquire data from several channels. The chip supports interleaved operation between channels: in dual-channel mode, ADCs operate at 2.5GSPS sampling rate; in single-channel mode, they operate at 5GSPS sampling rate.

Additionally, the chip supports AutoSync automatic synchronization for multi-chip cascading. It enables automatic synchronization for cascading multiple ADCs on a single board or across multiple boards. Data output formats are programmable as offset binary code or two‘s complement, offering user flexibility. Data is output via a parallel LVDS interface with a minimum conversion delay of 19ns.

Key advantages of the GXSC ADC:

- EBGA380 package, functionally equivalent to EV10AQ190A

- Low-power optimized design (56% of comparable models), no heatsink required

- Multi-chip auto-sync support with dedicated acquisition IP for ease of application

- Wide operating temperature range: -55°C to +125°C

 Full power bandwidth: 3.0GHz

Data latency: 80 master clock cycles

Static performance: DNL: -1.0/+1.1 LSB, INL: -1.3/+2.6 LSB

Dynamic performance in quad-channel/dual-channel/single-channel modes

-fs=1.25GSPS, fin=620MHz/1200MHz

ENOB=7.98Bit, SFDR=62.30dBFS, SNDR=49.82dBFS

ENOB=7.83Bit, SFDR=60.71dBFS, SNDR=48.87dBFS

-fs=2.5GSPS, fin=620MHz/1200MHz

ENOB=7.85Bit, SFDR=59.25dBFS, SNDR=48.99dBFS

ENOB=7.79Bit, SFDR=58.76dBFS, SNDR=48.66dBFS

-fs=5.0GSPS, fin=620MHz/1200MHz

ENOB=7.73Bit, SFDR=59.50dBFS, SNDR=48.29dBFS

ENOB=7.59Bit, SFDR=55.96dBFS, SNDR=47.47dBFS