ADS7816C Burr-Brown Corporation, ADS7816C Datasheet - Page 13

• Manufacturer Part Number: ADS7816C
• Description: 12-Bit High Speed Micro Power Sampling ANALOG-TO-DIGITAL CONVERTER
• Manufacturer: Burr-Brown Corporation

The ADS7816s and the DSP56004 can all be placed into a
power down mode. Or, the DSP56004 can run the ADS7816s
at a full 3.2MHz clock rate while on-board software enables
the ADS7816s as needed. With additional glue logic, the
DSP56004 could be used to run multiple DAC56s or provide
CS controls for each of the three ADS7816s.
FIGURE 7. Flexible Data Acquisition System.
FIGURE 8. Basic Data Acquisition System.
10
10
0.1µF
10
+
+
+
10µF
10µF
10µF
V
+In
–In
GND
0.1µF
0.1µF
0.1µF
REF
ADS7816
DCLOCK
D
V
OUT
CS
V
+In
–In
V
+In
–In
V
+In
–In
V
CC
REF
REF
REF
OUT
ADS7816
ADS7816
ADS7816
DAC56
DCLOCK
DCLOCK
DCLOCK
DATA
+
13
D
D
D
CLK
1µF to
OUT
OUT
OUT
10µF
CS
CS
CS
LE
5 to 10
Figure 8 shows a basic data acquisition system. The ADS7816
input range is 0V to 5V, as the reference input is connected
directly to the +5V supply. The 5 to 10 resistor and 1 F
to 10 F capacitor filter the microcontroller “noise” on the
supply, as well as any high-frequency noise from the supply
itself. The exact values should be picked such that the filter
provides adequate rejection of the noise.
+5V
Microcontroller
+
1µF to
10µF
WST
SDO0
SDO1
SDO2
SCKT
SCKR
SDI0
SDI1
WSR
SCK/SCL
MISO/SDA
MOSI/HA0
HREQ
SS/HA2
ADS7816
DSP56004
Serial Audio
Serial Host
Interface
Interface
®