AD9280 Analog Devices, AD9280 Datasheet - Page 10

• Manufacturer Part Number: AD9280
• Description: 8-Bit, Complete, 32 MSPS A/D Converter
• Manufacturer: Analog Devices

Specifications of AD9280

• Resolution (bits): 8bit
• # Chan: 1
• Sample Rate: 32MSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: 1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: SOP

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