ADS9813 datasheet(32/66 Pages) TI1

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6.4.5 Speed-Boost Mode

ADS9813 supports a speed-boost mode that allows up to 8MSPS sampling rate for a user-selected analog input

channel pair. In the speed-boost mode, only the user-selected channel pair is converted while the remaining 6

analog input channels are idle. The sampling rate is equal to the sampling clock frequency. The user can select

any pair combination of analog inputs from the list below:

• CH1 and CH8

• CH2 and CH7

• CH3 and CH6

• CH4 and CH5

The data output interface specifications remain the same as normal mode of operation. CH[4:1] and CH[8:5]

output data is replaced, respectively, by data corresponding to the channel pair selected.

Table 6-15 shows the register operations to enable or disable the speed-boost mode.

Table 6-15. Register operations for Speed-Boost Mode

STEP #

ENABLE SPEED-BOOST

DISABLE SPEED-BOOST

REG_BANK_SEL

BOOST_CFG1

BOOST_CFG2

EN_BOOST

SEL_CH_BOOST

•

0 for CH1 and CH8

•

1 for CH2 and CH7

•

2 for CH3 and CH6

•

3 for CH4 and CH5

REG_BANK_SEL

BOOST_CFG3

BOOST_CFG4

ADS9813, ADS9811, ADS9810

SBASAQ6A – JULY 2024 – REVISED NOVEMBER 2024

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ADS9813 Datasheet(PDF) 32 Page - Texas Instruments