THS1206

12-BIT 6 MSPS, SIMULTANEOUS SAMPLING

ANALOG-TO-DIGITAL CONVERTERS

SLAS217D – MAY 1999 – REVISED APRIL 2000

15

POST OFFICE BOX 655303

Reading data from the FIFO

The THS1206 informs the connected processor via the digital output DATA_AV (data available) that a block of

conversion values are ready to be read. The block size to be read is always equal to the setting of the trigger

level. The selectable trigger levels depend on the number of selected analog input channels. For example, when

choosing one analog input, a trigger level of 1, 4, 8 and 14 can be selected. The following figures demonstrate

the principle of reading the data.

In Figure 7, a trigger level of 1 is selected. The control signal DATA_AV is set to an active low pulse. This means

that the connected processor has the task to read 1 value from the ADC after every DATA_AV low pulse.

CONV_CLK

DATA_AV

READ

Figure 7. Trigger Level 1 Selected

In Figure 8, a trigger level of 4 is selected. The control signal DATA_AV is set to an active low pulse. This means

that the connected processor has the task to read 4 values from the ADC after every DATA_AV low pulse.

CONV_CLK

DATA_AV

READ

Figure 8. Trigger Level 4 Selected

In Figure 9, a trigger level of 8 is selected. The control signal DATA_AV is set to an active low pulse. This means

that the connected processor has the task to read 8 values from the ADC after every DATA_AV low pulse.

CONV_CLK

DATA_AV

READ

Figure 9. Trigger Level 8 Selected