ZHCSHD7A January 2018 – April 2020 ADC12DJ2700
PRODUCTION DATA.
ADC12DJ2700 device is an RF-sampling, giga-sample, analog-to-digital converter (ADC) that can directly sample input frequencies from DC to above 10 GHz. In dual-channel mode, the ADC12DJ2700 can sample up to 2700 GSPS and up to 5400 GSPS in single-channel mode. Programmable tradeoffs in channel count (dual-channel mode) and Nyquist bandwidth (single-channel mode) allow development of flexible hardware that meets the needs of both high channel count or wide instantaneous signal bandwidth applications. Full-power input bandwidth (–3 dB) of 8.0 GHz, with usable frequencies exceeding the –3-dB point in both dual- and single-channel modes, allows direct RF sampling of L-band, S-band, C-band, and X-band for frequency agile systems.
ADC12DJ2700 uses a high-speed JESD204B output interface with up to 16 serialized lanes and subclass-1 compliance for deterministic latency and multi-device synchronization. The serial output lanes support up to 12.8 Gbps and can be configured to trade-off bit rate and number of lanes.
A number of synchronization features, including noiseless aperture delay (tAD) adjustment and SYSREF windowing, simplify system design for multi-channel systems. Aperture delay adjustment can be used to simplify SYSREF capture, to align the sampling instance between multiple ADCs or to sample an ideal location of a front-end track and hold (T&H) amplifier output. SYSREF windowing offers a simplistic way to measure invalid timing regions of SYSREF relative to the device clock and then choose an optimal sampling location. Dual-edge sampling (DES) is implemented in single-channel mode to reduce the maximum clock rate applied to the ADC to support a wide range of clock sources and relax setup and hold timing for SYSREF capture.
Optional digital down converters (DDCs) are available in dual-channel mode to allow a reduction in interface rate (decimation) and digital mixing of the signal to baseband. The DDC block supports data decimation of 4x, 8x or 16x and alias-free complex output bandwidths of 80% of the effective output data rate.
ADC12DJ2700 provides foreground and background calibration options for gain, offset and static linearity errors. Foreground calibration is run at system startup or at specified times during which the ADC is offline and not sending data to the logic device. Background calibration allows the ADC to run continually while the cores are calibrated in the background so that the system does not experience downtime. The calibration routine is also used to match the gain and offset between sub-ADC cores to minimize spurious artifacts from time interleaving.