ZHCSON7A July 2021 – October 2024 ADC12DJ800-Q1 , ADC12QJ800-Q1 , ADC12SJ800-Q1
PRODUCTION DATA
The device uses a JESD204C high-speed serial interface for data converters to transfer data from the ADC to the receiving logic device. The device serialized lanes are capable of operating with both 8B/10B encoding and 64B/66B encoding. The JESD204C output formats using 8B/10B encoding are backwards compatible with existing JESD204B receivers. A maximum of 8 lanes can be used to lower lane rates for interfacing with speed-limited logic devices. There are a few differences between 8B/10B and 64B/66B encoded JESD204C, which is highlighted throughout this section. Figure 6-7 shows a simplified block diagram of the 8B/10B encoded JESD204C interface and Figure 6-8 shows a simplified block diagram of the 64B/66B encoded JESD204C interface.
The various signals used in the JESD204C interface and the associated ADC12xJ800-Q1 pin names are summarized briefly in Table 6-8 for reference. Most of the signals are common between 8B/10B and 64B/66B encoded JESD204C, except for SYNC which is not needed to achieve block synchronization for 64B/66B encoding. The sync header encoded into the data stream is used for block synchronization instead of the SYNC signal.
SIGNAL NAME | PIN NAMES | 8B/10B | 64B/66B | DESCRIPTION |
---|---|---|---|---|
Data | Quad/dual channel: D[7:0]+, D[7:0]– Single channel: D[3:0]+, D[3:0]– | Yes | Yes | High-speed serialized data after 8B/10B or 64B/66B encoding |
SYNC | SYNCSE | Yes | No | Link initialization signal (handshake), toggles low to start code group synchronization (CGS) process. Not used for 64B/66B encoding modes, unless it is used for NCO synchronization purposes. |
Device clock | CLK+, CLK– or SE_CLK | Yes | Yes | ADC sampling clock or PLL reference clock, also used for clocking digital logic and output serializers |
SYSREF | SYSREF+, SYSREF– | Yes | Yes | System timing reference used to deterministically reset the internal local multiframe clock (LMFC) or local extended multiblock clock (LEMC) counters in each JESD204C device |
Not all optional features of JESD204C are supported by ADC12xJ800-Q1. The list of features that are supported and the features that are not supported is provided in Table 6-9.
LETTER IDENTIFIER | REFERENCE CLAUSE | FEATURE | SUPPORT IN ADC12xJ800-Q1 |
---|---|---|---|
a | clause 8 | 8B/10B link layer | Supported |
b | clause 7 | 64B/66B link layer | Supported |
c | clause 7 | 64B/80B link layer | Not supported |
d | clause 7 | The command channel when using the 64B/66B or 64B/80B link layer | Not supported |
e | clause 7 | Forward error correction (FEC) when using the 64B/66B or 64B/80B link layer | Supported |
f | clause 7 | CRC3 when using the 64B/66B or 64B/80B link layer | Not supported |
g | clause 8 | A physical SYNC pin when using the 8B/10B link layer | Supported |
h | clause 7, clause 8 | Subclass 0 | Not supported, but subclass 1 transmitter is compatible with subclass 0 receiver |
i | clause 7, clause 8 | Subclass 1 | Supported |
j | clause 8 | Subclass 2 | Not supported |
k | clause 7, clause 8 | Lane alignment within a single link | Supported |
l | clause 7, clause 8 | Subclass 1 with support for a lane alignment on a multipoint link by means of the MULTIREF signal | Not supported |
m | clause 8 | SYNC interface timing is compatible with JESD204A | Supported |
n | clause 8 | SYNC interface timing is compatible with JESD204B | Supported |