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ADS8331 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
ADS8331 2.7V~5.5V, 16 Bit 500KSPS Low Power Serial ADC / Low-Power, 16-Bit, 500kSPS, 4-/8-Channel Unipolar Input TI
Texas Instruments TI
ADS8331 Datasheet PDF : 39 Pages
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ADS8331
ADS8332
SBAS363 – DECEMBER 2009
www.ti.com
MANUAL TRIGGER CASE 1 (Wakeup Using CONVST):
CONVST
N
EOC
(active low)
tWL1
(N+1)
Converter State
Read While Converting
CS
Read While Sampling
CS
Wakeup
Sample N
³ 3 CCLK
³ 6 CCLK
Read Result
(N - 1)
Conversion N
= 18 CCLK
tH2
Read Result
(N - 1)
tSU2
Note
(1)
Power-Down
Wakeup
Sample (N + 1)
³ 3 CCLK
³ 6 CCLK
tSU1
Read Result
N
Conversion (N + 1)
Note
(1)
Power-Down
= 18 CCLK
tH2
tSU1
Read Result
N
tSU2
MANUAL TRIGGER CASE 2 (Wakeup Using Wakeup Command):
CONVST
N
EOC
(active low)
tWL1
(N+1)
Converter State
Wakeup
Sample N
³ 3 CCLK
Conversion N
= 18 CCLK
Note
(1)
Power-Down
Wakeup
Sample (N + 1)
³ 3 CCLK
Conversion (N + 1)
Note
(1)
Power-Down
= 18 CCLK
Read While Converting
Note
CS (2)
Read While Sampling
Note
CS (2)
Read Result
(N - 1)
tH2
Read Result
(N - 1)
tSU2
tSU1
Note
(2)
Note
(2)
tH2
tSU1
Read Result
N
tSU2
Read Result
N
(1) Time between end of conversion and Nap Power-Down mode is 1 CCLK.
(2) Command on SDI to wake up converter (minimum of four SCLKs).
Figure 45. Read While Converting vs Read While Sampling with Auto-Nap Power-Down
26
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Product Folder Link(s): ADS8331 ADS8332
Copyright © 2009, Texas Instruments Incorporated
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