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APPLICATION INFORMATION

EXAMPLE DIGITAL STIMULUS

SDO

D15

MSB

2

3

16

SCLK

D13

D14

D1

D2

D0

LSB

SAMPLE

CONVERT

BUSY

CONVERT

485 ns

15 ns

15 ns

80 ns

50 ns

25 ns

12.5 ns

DEVICE STATE

CONVST

Frequency = 600 kHz

CS

15

ADS8370

SLAS450 – JUNE 2005

Table 3. Power Supply Decoupling Capacitor Placement

CONVERTER DIGITAL

SUPPLY PINS

CONVERTER ANALOG SIDE

SIDE

Pair of pins requiring a shortest path to

(2,3); (5,6); (15,16); (17,18)

(20,21)

decoupling capacitors

Pins requiring no decoupling

4, 14, 19

When using the internal reference, ensure a shortest path from REFOUT (pin 9) to REFIN (pin 8) with the

bypass capacitor directly between pins 8 and 7.

The use of the ADS8370 is very straightforward. The following timing diagram shows one example of how to

achieve a 600-KSPS throughput using a SPI compatible serial interface.

Figure 56. Example Stimulus in SPI Mode (FS =1), Back-To-Back Conversion that Achieves 600 KSPS

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