AD7654 Analog Devices, AD7654 Datasheet - Page 15

• Manufacturer Part Number: AD7654
• Manufacturer: Analog Devices

Specifications of AD7654

• Resolution (bits): 16bit
• # Chan: 4
• Sample Rate: 500kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref) x 2,Uni 5.0V
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

ANALOG INPUT B2
ANALOG INPUT A1
ANALOG INPUT A2
ANALOG INPUT B1
2.5V REF
AD780
NOTE 1
ANALOG
SUPPLY
NOTE 4
NOTE 4
NOTE 4
NOTE 4
(5V)
100nF
1MΩ
NOTE 3
–
+
–
+
–
+
–
+
C
C
C
C
U2
U4
50Ω
U1
50Ω
50Ω
U3
50Ω
C
C
C
C
50kΩ
NOTES
1. SEE VOLTAGE REFERENCE INPUT SECTION.
2. WITH THE RECOMMENDED VOLTAGE REFERENCES, C
3. OPTIONAL CIRCUITRY FOR HARDWARE GAIN CALIBRATION.
4. THE AD8021 IS RECOMMENDED. SEE DRIVER AMPLIFIER CHOICE SECTION.
5. SEE ANALOG INPUTS SECTION.
6. OPTIONAL, SEE POWER SUPPLY SECTION.
7. OPTIONAL LOW JITTER CNVST. SEE CONVERSION CONTROL SECTION.
NOTE 5
NOTE 5
NOTE 5
NOTE 5
+
2.7nF
2.7nF
2.7nF
2.7nF
10Ω
10Ω
10Ω
10Ω
+
NOTE 2
C
REF
10µF
1µF
Figure 18. Typical Connection Diagram (Serial Interface)
100nF
REF
REF A
REF B
REFGND
INA1
INB1
INB2
INBN
INA2
INAN
AVDD
NOTE 1
NOTE 6
AGND
30Ω
Rev. B | Page 15 of 28
+
10µF
AD7654
DGND
100nF
REF
DVDD OVDD
DVDD
IS 47µF. SEE VOLTAGE REFERENCE INPUT SECTION.
BYTESWAP
SER/PAR
SDOUT
CNVST
RESET
OGND
BUSY
SCLK
A/B
CS
RD
PD
A0
100nF
NOTE 7
+
50Ω
10µF
DVDD
SERIAL PORT
D
DIGITAL SUPPLY
(3.3V OR 5V)
CLOCK
µC/µP/
DSP
AD7654