SLVSDR2B November 2018 – March 2021 ADC12DJ3200QML-SP
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The component selection and ADC12DJ3200QML-SP configuration for the application described in Section 8.2.1 is discussed is this section. The components of the wideband RF sampling receiver are given in Table 8-3 along with the reason for the selection.
COMPONENT | SELECTION | REASON |
---|---|---|
ADC | Texas Instruments' ADC12DJ3200QML-SP | Sampling rate requirement (6.4 GSPS) and high input frequency makes ADC12DJ3200QML-SP a natural choice. |
Sampling clock generation | Texas Instruments' LMX2615-SP | LMX2615-SP generates a high performing sampling clock due to low jitter (45 fs) and high output swing. The SYSREF features simplify multi-device synchronization. |
Clock distribution | Texas Instruments' LMK04832 | Support for 7 JESD204 ADCs, DACs or logic devices (FPGA or ASIC) and a number of operating modes such as single PLL mode, dual PLL mode or clock distribution mode. |
Transformer/Balun | Marki Microwave's BAL-0208SMG(1) | Small size, wide frequency coverage and good performance within required frequency band. |
The ADC12DJ3200QML-SP configuration and key parameters are given in Table 8-4. The calculations or sources for the various parameters are provided where applicable.
PARAMETER | CALCULATION | SETTING OR VALUE | UNITS |
---|---|---|---|
JMODE | — | 1 | — |
DDC mode | From JMODE selection | N/A (dual-channel mode only) | — |
ADC channels | From JMODE selection | 1 | — |
Analog input used | INA± provides best performance in single-channel mode | INA± | — |
Total SerDes lanes | From JMODE selection | 16 | Lanes |
R (fBIT / fCLK) | From JMODE selection | 2 | Gbps / GHz |
SerDes line rate | fLINERATE = fCLK * R | 6.4 | Gbps |
Links | From JMODE selection | 2 | Links |
L (per link) | From JMODE selection | 8 | Lanes / Link |
M (per link) | From JMODE selection | 8 | Converters / Link |
F | From JMODE selection | 8 | Frames / Lane |
S | From JMODE selection | 5 | Samples / Frame |
K | ceil(17/F) ≤ K ≤ min(32, floor(1024/F)) | 8 (others allowed) | Frames / Multiframe |
CLK± Frequency | fCLK = fS / 2 (for single-channel mode) | 3.2 | GHz |
SYSREF frequency | fSYSREF = fLINERATE / (10 * F * K * n) | 10 / n | MHz |
Total clock jitter | τT = sqrt( τCLK2 + τAJ2 ) | 83 | fs |