Datasheet

AD9280
–10–
A2
10kV
10kV
10kV
A/D
CORE
4.2kV
TOTAL
REFTS
REFBS
10mF
0.1mF
REFTF
REFBF
0.1mF
AIN
+F/S RANGE
OBTAINED FROM
VREF PIN OR
EXTERNAL REF
–F/S RANGE
OBTAINED FROM
VREF PIN OR
EXTERNAL REF
0.1mF
MODE
(AVDD)
+FS
–FS
AD9280
10kV
SHA
a. Top/Bottom Mode
V
MAXIMUM MAGNITUDE OF V
IS DETERMINED BY INTERNAL
REFERENCE AND TURNS RATIO
MODE
INTERNAL
REF
AVDD/2
10kV
10kV
10kV
A/D
CORE
4.2kV
TOTAL
10mF
0.1mF
REFTF
REFBF
0.1mF
AIN
0.1mF
AD9280
10kV
A2
REFTS
REFBS
AVDD/2
SHA
c. Differential Mode
A1
1V
AVSS
REFSENSE
VREF
(1V)
AD9280
0.1mF
1.0mF
d. 1 V Reference
A1
1V
AVSS
REFSENSE
VREF
(= 1 + R
A
/R
B
)
R
A
R
B
INTERNAL 10K REF RESISTORS ARE
SWITCHED OPEN BY THE PRESENSE
OF R
A
AND R
B
.
AD9280
0.1mF
1.0mF
f. Variable Reference
(Between 1 V and 2 V)
A1
10kV
10kV
1V
AVSS
REFSENSE
VREF
(2V)
AD9280
0.1mF
1.0mF
e. 2 V Reference
A1
1V
REFSENSE
AVDD
VREF
AD9280
g. Internal Reference Disable
(Power Reduction)
Figure 16.
MODE
INTERNAL
REF
MIDSCALE OFFSET
VOLTAGE IS DERIVED
FROM INTERNAL OR
EXTERNAL REF
MIDSCALE
V*
AVDD/2
* MAXIMUM MAGNITUDE OF V IS DETERMINED
BY INTERNAL REFERENCE
10kV
10kV
10kV
A/D
CORE
4.2kV
TOTAL
REFTS
REFBS
10mF
0.1mF
REFTF
REFBF
0.1mF
AIN
0.1mF
AD9280
10kV
A2
SHA
b. Center Span Mode
REV. E