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THS10064DA Datasheet(PDF) 10 Page - Texas Instruments |
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THS10064DA Datasheet(HTML) 10 Page - Texas Instruments |
10 / 41 page THS10064 10-BIT 6 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER SLAS255 – DECEMBER 1999 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 sampling rate (continued) Table 2. Maximum Conversion Rate in Single Conversion Mode CHANNEL CONFIGURATION NUMBER OF CHANNELS MAXIMUM CONVERSION RATE PER CHANNEL 1 single-ended channel 1 3 MSPS 2 single-ended channels 2 2 MSPS 3 single-ended channels 3 1.5 MSPS 4 single-ended channels 4 1.2 MSPS 1 differential channel 1 3 MSPS 2 differential channels 2 2 MSPS 1 single-ended and 1 differential channel 2 1.5 MSPS 2 single-ended and 1 differential channels 3 1.2 MSPS single conversion mode In single conversion mode, a single conversion of the selected analog input channels is performed. The single conversion mode is selected by setting bit 1 of control register 0 to 1. A single conversion is initiated by pulsing the CONVST input. On the falling edge of CONVST, the sample and hold stages of the selected analog inputs are placed into hold simultaneously, and the conversion sequence for the selected channels is started. The conversion clock in single conversion mode is generated internally using a clock oscillator circuit. The signal DATA_AV (data available) becomes active when the trigger level is reached and indicates that the converted sample(s) is (are) written into the FIFO and can be read out. The trigger level in the single conversion mode can be selected according to Table 13. Figure 1 shows the timing of the single conversion mode. In this mode, up to four analog input channels can be selected to be sampled simultaneously (see Table 2). CONVST AIN Sample N t1 t1 td(A) t2 tDATA_AV DATA_AV, Trigger Level = 1 Figure 1. Timing of Single Conversion Mode The time (t2) between consecutive starts of single conversions is dependent on the number of selected analog input channels. The time tDATA_AV, until DATA_AV becomes active is given by: tDATA_AV = tpipe + n × tc. This equation is valid for a trigger level which is equivalent to the number of selected analog input channels. For all other trigger level conditions refer to the timing specifications of single conversion mode. |
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