AD7949 Analog Devices, AD7949 Datasheet - Page 15

• Manufacturer Part Number: AD7949
• Description: 14-Bit, 8-Channel, 250 kSPS PulSAR ADC
• Manufacturer: Analog Devices

Specifications of AD7949

• Resolution (bits): 14bit
• # Chan: 8
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
TYPICAL CONNECTION DIAGRAMS
V
NOTES
1. INTERNAL REFERENCE SHOWN. SEE VOLTAGE REFERENCE OUTPUT/INPUT SECTION FOR
2. C
3. SEE THE DRIVER AMPLIFIER CHOICE SECTION FOR ADDITIONAL RECOMMENDED AMPLIFIERS.
4. SEE THE DIGITAL INTERFACE SECTION FOR CONFIGURING AND READING CONVERSION DATA.
REF
0V TO V
0V TO V
NOTES
1. INTERNAL REFERENCE SHOWN. SEE VOLTAGE REFERENCE OUTPUT/INPUT SECTION FOR
2. C
3. SEE THE DRIVER AMPLIFIER CHOICE SECTION FOR ADDITIONAL RECOMMENDED AMPLIFIERS.
4. SEE THE DIGITAL INTERFACE SECTION FOR CONFIGURING AND READING CONVERSION DATA.
REFERENCE SELECTION.
V
REF
REFERENCE SELECTION.
REF
0V OR
V
p-p
REF
REF
ADA4841-x
ADA4841-x
/2
IS USUALLY A 10µF CERAMIC CAPACITOR (X5R).
REF
REF
IS USUALLY A 10µF CERAMIC CAPACITOR (X5R).
/2
3
3
V–
V+
V–
Figure 25. Typical Application Diagram with Multiple Supplies
V+
Figure 26. Typical Application Diagram Using Bipolar Input
V–
V–
V+
V+
ADA4841-x
ADA4841-x
10µF
10µF
3
3
2
2
COM
IN0
IN[7:1]
Rev. C | Page 15 of 32
IN0
IN[7:1]
COM
REF
REF
100nF
+5V
100nF
AD7949
REFIN
REFIN
AD7949
GND
GND
VDD
VDD
100nF
100nF
5V
VIO
SCK
SDO
CNV
DIN
VIO
100nF
1.8V TO VDD
SDO
SCK
CNV
DIN
100nF
1.8V TO VDD
MOSI
SCK
MISO
SS
MOSI
SCK
MISO
SS
AD7949