Datasheet
OPA365
47 F,
1.5 ESR
(HighESR)
m
W
10 Fm
50 W
REF5050
+
-
+
-
ADS8319
IN +
IN -
REFIN
OUT
TRIM
-
+
4.7 F,
LowESR
m
50 W
THS4031
orOPA211
+
-
1nF
ADS8319
-IN
+IN
+VA
0-Vref
5 W
5 W
ADS8319
www.ti.com
SLAS600A –MAY 2008–REVISED SEPTEMBER 2013
Figure 58. Input Drive Configuration
REFERENCE
The ADS8319 can operate with an external reference with a range from 2.25 V to V
DD
+ 0.1 V. A clean, low
noise, well-decoupled reference voltage on this pin is required to ensure good performance of the converter. A
low noise band-gap reference like the REF5040, REF5050 can be used to drive this pin. A ceramic decoupling
capacitor is required between the REF+ and GND pins of the converter (see Figure 59). The capacitor should be
placed as close as possible to the pins of the device.
Figure 59. External Reference Driving Circuit
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