ADS8402 Datasheet, PDF (20/27 Pages) Burr-Brown (TI) – 16-BIT, 1.25 MSPS, UNIPOLAR DIFFERENTIAL INPUT, MICRO POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE AND REFERENCE

ADS8402
SLAS154B – DECEMBER 2002 – REVISED MAY 2003
www.ti.com
APPLICATION INFORMATION
MICROCONTROLLER INTERFACING
ADS8402 to 8-Bit Microcontroller Interface
Figure 32 shows a parallel interface between the ADS8402 and a typical microcontroller using the 8-bit data bus.
The BUSY signal is used as a falling-edge interrupt to the microcontroller.
Analog 5 V
Micro
Controller
GPIO
GPIO
P[7:0]
RD
GPIO
INT
0.1 µF
10 µF
AGND
1 µF
0.1 µF
Ext Ref Input
Analog Input
CS
ADS8402
BYTE
DB[15:8]
BDGND
RD
CONVST
BUSY
+VBD
Digital 3 V
0.1 µF
BDGND
Figure 32. ADS8402 Application Circuitry (using external reference)
Analog 5 V
0.1 µF
10 µF
AGND
0.1 µF
1 µF
AGND
ADS8402
Figure 33. Use Internal Reference
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