Datasheet
N N+1
Manual Trigger
Converter
State
Wake-Up
N −th Sampling
>=3CCLK
EOC
EOS
N −th Conversion
=18 CCLK
Wake-Up N+1 −th Sampling
>=3CCLK
EOC
EOS
N+1 −th Conversion
=18 CCLK
ReadN−1 −th
Result
20nsMIN
Read N −th
Result
20nsMIN
40nsMIN
EOC
(programmed
Active Low)
POWERDOWN POWERDOWN
CONVST
CS
Read While Converting
6 CCLKs
6 CCLKs
(wake up by CONVST)
ADS7229
ADS7230
SBAS437A – MAY 2008 – REVISED JUNE 2009 ...............................................................................................................................................................
www.ti.com
Figure 60. Read While Converting with Auto Nap Power-Down
Total Acquisition + Conversion Cycle Time:
Auto trigger: = 21 CCLKs
Manual: ≥ 21 CCLKs
Manual + deep ≥ 4 SCLK + 100 µ s + 3 CCLK + 18 CCLK +16 SCLK + 1 µ s
power-down:
Manual + nap power-down: ≥ 4 SCLK + 3 CCLK + 3 CCLK + 18 CCLK +16 SCLK
Manual + auto nap ≥ 1 CCLK + 3 CCLK + 3 CCLK + 18 CCLK +16 SCLK (use CONVST to resume)
power-down:
Manual + auto nap ≥ 4 SCLK + 3 CCLK + 3 CCLK + 18 CCLK +16 SCLK (use wake up to resume)
power-down:
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