AD9083BBCZ datasheet(58/93 Pages) AD

58 / 93 page

AD9083

Data Sheet

Rev. 0 | Page 58 of 93

Example 2 : Narrow Bandwidth Complex Output Mode

After powering up the device, execute the API sequence

according to the target application requirements listed in this

section. This sequence configures the AD9083 to operate in narrow

bandwidth mode using frequency translation in the datapath. The

total power consumption in this mode is about1.17 W.

•

Sample rate = 2 GSPS.

•

On-chip PLL reference = 250 MHz.

•

fINMAX = 100 MHz (sample rate/20).

•

fC = 800 MHz.

•

VMAX = 2.0 V.

•

RTERM = 100 Ω.

•

EN_HP = 0

•

Backoff = 0

•

NCO0/mixer (complex data), FTW = 70.3125 MHz.

•

CIC decimator = 4.

•

Decimate by J = 16.

•

Output bandwidth = ±12.7187 MHz.

•

Transport parameters L, M, F, S, N’, K = 2, 32, 32, 1, 16, 32.

•

Each lane = 10 Gbps.

The following API sequence with specific input parameters is needed to fully configure the part in the wide bandwidth mode of operation:

// Define device structure and instantiate

adi_ad9083_device_t ad9083_dev;

// Perform soft reset

adi_ad9083_device_reset(&ad9083_dev, 0);

// Get API revision, CPU info etc

adi_ad9083_device_init(&ad9083_dev);

// Set up clocking configuration, lock on-chip PLL

//ADC Sample Rate = 2GSPS (adc_clk_hz in units of Hz)

//PLL Reference Clock = 250MHz (ref_clk_hz in units of Hz)

adi_ad9083_device_clock_config_set(&ad9083_dev, adc_clk_hz = 2000000000, ref_clk_hz =

250000000);

// Setup VCO ADC settings

//LPF bandwidth Fc = 800MHz (fc in units of Hz), Vmax = 2.0V (vmax in mV units)

//Rterm = 100 ohm (rterm bitfield = 2 for 100 ohm), Enhp = 0

//Backoff = 0dB (backoff in terms of noise, dB * 100)

//Finmax = 100MHz (finmax in units of Hz)

adi_ad9083_adc_term_res_e rterm = AD9083_ADC_TERM_RES_100; // (enum value = 2)

adi_ad9083_rx_adc_config_set(&ad9083_dev, fc = 800000000, vmax = 2000, rterm = term, en_hp

= 0, backoff = 0, finmax = 100000000);

// Setup Datapath

//Datapath: ADC -> CIC -> NCO -> J -> JESD204B output

//Decimation: CIC =4, J Decimation = 16, G value bypassed, H value bypassed

//NCO frequency shifts: NCO0 = 70.3125MHz, NCO1 & NCO2 bypassed

adi_ad9083_datapath_mode_e datapath_mode = AD9083_DATAPATH_ADC_CIC_NCO_J;

uint8_t dec[] = {AD9083_CIC_DEC_4, AD9083_J_DEC_16, 0, 0};

uint64_t nco_freq_hz = { 70312500, 0, 0};

adi_ad9083_rx_datapath_config_set(&ad9083_dev, datapath_mode, dec, nco_freq_hz);

AD9083BBCZ Datasheet(PDF) 58 Page - Analog Devices

AD9083BBCZ Datasheet(HTML) 58 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93

Datasheet Download

Link URL