12ビット、RF サンプリング A/D コンバータ (ADC)" />
JAJSGI4B November 2018 – March 2021 ADC12DJ3200QML-SP
PRODUCTION DATA
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The ADC12DJ3200QML-SP can be programmed as a single-channel or dual-channel ADC, with or without decimation, and a number JESD204B output formats. Table 7-16 summarizes the basic operating mode configuration parameters and whether they are user configured or derived.
Powering down high-speed data outputs (DA0± ... DA7±, DB0± ... DB7±) for extended times can damage the output serializers, especially at high data rates. For information regarding reliable serializer operation, see the Power-Down Modes section.
PARAMETER | DESCRIPTION | USER CONFIGURED OR DERIVED | VALUE |
---|---|---|---|
JMODE | JESD204B operating mode, automatically derives the rest of the JESD204B parameters, single-channel or dual-channel mode and the decimation factor | User configured | Set by JMODE (see the JESD204B mode register) |
D | Decimation factor | Derived | See Table 7-18 |
DES | 1 = single-channel mode, 0 = dual-channel mode | Derived | See Table 7-18 |
R | Number of bits transmitted per lane per DEVCLK cycle. The JESD204B line rate is the DEVCLK frequency times R. This parameter sets the SerDes PLL multiplication factor or controls bypassing of the SerDes PLL. | Derived | See Table 7-18 |
Links | Number of JESD204B links used | Derived | See Table 7-18 |
K | Number of frames per multiframe | User configured | Set by KM1 (see the JESD204B K parameter register), see the allowed values in Table 7-18 |
There are a number of parameters required to define the JESD204B format, all of which are sent across the link during the initial lane alignment sequence. In the ADC12DJ3200QML-SP, most parameters are automatically derived based on the selected JMODE; however, a few are configured by the user. Table 7-17 describes these parameters.
PARAMETER | DESCRIPTION | USER CONFIGURED OR DERIVED | VALUE |
---|---|---|---|
ADJCNT | LMFC adjustment amount (not applicable) | Derived | Always 0 |
ADJDIR | LMFC adjustment direction (not applicable) | Derived | Always 0 |
BID | Bank ID | Derived | Always 0 |
CF | Number of control words per frame | Derived | Always 0 |
CS | Control bits per sample | Derived | Always set to 0 in ILAS, see Table 7-18 for actual usage |
DID | Device identifier, used to identify the link | User configured | Set by DID (see the JESD204B DID parameter register), see Table 7-19 |
F | Number of octets (bytes) per frame (per lane) | Derived | See Table 7-18 |
HD | High-density format (samples split between lanes) | Derived | Always 0 |
JESDV | JESD204 standard revision | Derived | Always 1 |
K | Number of frames per multiframe | User configured | Set by the KM1 register, see the JESD204B K parameter register |
L | Number of serial output lanes per link | Derived | See Table 7-18 |
LID | Lane identifier for each lane | Derived | See Table 7-19 |
M | Number of converters used to determine lane bit packing; may not match number of ADC channels in the device | Derived | See Table 7-18 |
N | Sample resolution (before adding control and tail bits) | Derived | See Table 7-18 |
N' | Bits per sample after adding control and tail bits | Derived | See Table 7-18 |
S | Number of samples per converter (M) per frame | Derived | See Table 7-18 |
SCR | Scrambler enabled | User configured | Set by the JESD204B control register |
SUBCLASSV | Device subclass version | Derived | Always 1 |
RES1 | Reserved field 1 | Derived | Always 0 |
RES2 | Reserved field 2 | Derived | Always 0 |
CHKSUM | Checksum for ILAS checking (sum of all above parameters modulo 256) | Derived | Computed based on parameters in this table |
Configuring the ADC12DJ3200QML-SP is made easy by using a single configuration parameter called JMODE (see the JESD204B mode register). Using Table 7-18, the correct JMODE value can be found for the desired operating mode. The modes listed in Table 7-18 are the only available operating modes. This table also gives a range and allowable step size for the K parameter (set by KM1, see the JESD204B K parameter register), which sets the multiframe length in number of frames.
ADC12DJ3200QML-SP OPERATING MODE | USER-SPECIFIED PARAMETER | DERIVED PARAMETERS | INPUT CLOCK RANGE (MHz) | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
JMODE | K [Min:Step:Max] |
D | DES | Links | N | CS | N’ | L (Per Link) |
M (Per Link) |
F | S | R (Fbit / Fclk) |
||
12-bit, single-channel, 8 lanes | 0 | 3:1:32 | 1 | 1 | 2 | 12 | 0 | 12 | 4 | 4(1) | 8 | 5 | 4 | 800-3200 |
12-bit, single-channel, 16 lanes | 1 | 3:1:32 | 1 | 1 | 2 | 12 | 0 | 12 | 8 | 8(1) | 8 | 5 | 2 | 800-3200 |
12-bit, dual-channel, 8 lanes | 2 | 3:1:32 | 1 | 0 | 2 | 12 | 0 | 12 | 4 | 4(1) | 8 | 5 | 4 | 800-3200 |
12-bit, dual-channel, 16 lanes | 3 | 3:1:32 | 1 | 0 | 2 | 12 | 0 | 12 | 8 | 8(1) | 8 | 5 | 2 | 800-3200 |
8-bit, single-channel, 4 lanes | 4 | 18:2:32 | 1 | 1 | 2 | 8 | 0 | 8 | 2 | 1 | 1 | 2 | 5 | 800-2560 |
8-bit, single-channel, 8 lanes | 5 | 18:2:32 | 1 | 1 | 2 | 8 | 0 | 8 | 4 | 1 | 1 | 4 | 2.5 | 800-3200 |
8-bit, dual-channel, 4 lanes | 6 | 18:2:32 | 1 | 0 | 2 | 8 | 0 | 8 | 2 | 1 | 1 | 2 | 5 | 800-2560 |
8-bit, dual-channel, 8 lanes | 7 | 18:2:32 | 1 | 0 | 2 | 8 | 0 | 8 | 4 | 1 | 1 | 4 | 2.5 | 800-3200 |
Reserved | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
15-bit, real data, decimate-by-2, 8 lanes | 9 | 9:1:32 | 2 | 0 | 2 | 15 | 1(2) | 16 | 4 | 1 | 2 | 4 | 2.5 | 800-3200 |
15-bit, decimate-by-4, 4 lanes | 10 | 9:1:32 | 4 | 0 | 2 | 15 | 1(2) | 16 | 2 | 2 | 2 | 1 | 5 | 800-2560 |
15-bit, decimate-by-4, 8 lanes | 11 | 9:1:32 | 4 | 0 | 2 | 15 | 1(2) | 16 | 4 | 2 | 2 | 2 | 2.5 | 800-3200 |
12-bit, decimate-by-4, 16 lanes | 12 | 3:1:32 | 4 | 0 | 2 | 12 | 0 | 12 | 8 | 8(1) | 8 | 5 | 1 | 1000-3200 |
15-bit, decimate-by-8, 2 lanes | 13 | 5:1:32 | 8 | 0 | 2 | 15 | 1(2) | 16 | 1 | 2 | 4 | 1 | 5 | 800-2560 |
15-bit, decimate-by-8, 4 lanes | 14 | 9:1:32 | 8 | 0 | 2 | 15 | 1(2) | 16 | 2 | 2 | 2 | 1 | 2.5 | 800-3200 |
15-bit, decimate-by-16, 1 lane | 15 | 3:1:32 | 16 | 0 | 1 | 15 | 1(2) | 16 | 1 | 4 | 8 | 1 | 5 | 800-2560 |
15-bit, decimate-by-16, 2 lanes | 16 | 5:1:32 | 16 | 0 | 2 | 15 | 1(2) | 16 | 1 | 2 | 4 | 1 | 2.5 | 800-3200 |
8-bit, single-channel, 16 lanes | 17 | 18:2:32 | 1 | 1 | 2 | 8 | 0 | 8 | 8 | 1 | 1 | 8 | 1.25 | 800-3200 |
8-bit, dual-channel, 16 lanes | 18 | 18:2:32 | 1 | 0 | 2 | 8 | 0 | 8 | 8 | 1 | 1 | 8 | 1.25 | 800-3200 |
The ADC12DJ3200QML-SP has a total of 16 high-speed output drivers that are grouped into two 8-lane JESD204B links. Most operating modes use two links with up to eight lanes per link. The lanes and their derived configuration parameters are described in Table 7-19. For a specified JMODE, the lowest indexed lanes for each link are used and the higher indexed lanes for each link are automatically powered down. Always route the lowest indexed lanes to the logic device.
DEVICE PIN DESIGNATION | LINK | DID (User Configured) | LID (Derived) |
---|---|---|---|
DA0± | A | Set by DID (see theJESD204B DID parameter register), the effective DID is equal to the DID register setting (DID) | 0 |
DA1± | 1 | ||
DA2± | 2 | ||
DA3± | 3 | ||
DA4± | 4 | ||
DA5± | 5 | ||
DA6± | 6 | ||
DA7± | 7 | ||
DB0± | B | Set by DID (see theJESD204B DID parameter register), the effective DID is equal to the DID register setting plus 1 (DID+1) | 0 |
DB1± | 1 | ||
DB2± | 2 | ||
DB3± | 3 | ||
DB4± | 4 | ||
DB5± | 5 | ||
DB6± | 6 | ||
DB7± | 7 |