AD6643
Parameter1
Temperature
Min
Typ
Max
Unit
TWO TONE SFDR
2ꢀ°C
Full
88
dBc
dB
fIN = 184.12 MHz, 187.12 MHz (−7 dBFS)
CROSSTALK2
9ꢀ
FULL POWER BANDWIDTH3
NOISE BANDWIDTH4
2ꢀ°C
2ꢀ°C
400
1000
MHz
MHz
1 For a complete set of definitions, see the AN-83ꢀ Application Note, Understanding High Speed ADC Testing and Evaluation.
2 Crosstalk is measured at 100 MHz with −1 dBFS on one channel and with no input on the alternate channel.
3 Full power bandwidth is the bandwidth of operation where typical ADC performance can be achieved.
4 Noise bandwidth is the −3 dB bandwidth for the ADC inputs across which noise may enter the ADC and it is not attenuated internally.
DIGITAL SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS differential input, 1.75 V p-p full-scale input range,
DCS enabled, default SPI, unless otherwise noted.
Table 3.
Parameter
Temperature Min
Typ
Max
Unit
DIFFERENTIAL CLOCK INPUTS (CLK+, CLK−)
Logic Compliance
Internal Common-Mode Bias
Differential Input Voltage
Input Voltage Range
Input Common-Mode Range
Input Current Level
High
CMOS/LVDS/LVPECL
Full
0.9
3.6
V
V p-p
V
V
Full
Full
Full
0.3
AGND
0.9
AVDD
1.4
Full
Full
Full
Full
10
−22
22
−10
μA
μA
pF
kΩ
Low
4
Input Capacitance
Input Resistance
SYNC INPUT
8
10
12
Logic Compliance
Internal Bias
Input Voltage Range
Input Voltage Level
High
CMOS/LVDS
0.9
Full
Full
V
V
AGND
AVDD
Full
Full
1.2
AGND
AVDD
0.6
V
V
Low
Input Current Level
High
Low
Input Capacitance
Input Resistance
LOGIC INPUT (CSB)1
Input Voltage Level
High
Full
Full
Full
Full
−ꢀ
−100
+ꢀ
+100
μA
μA
pF
kΩ
1
16
12
20
Full
Full
1.22
0
2.1
0.6
V
V
Low
Input Current Level
High
Low
Input Resistance
Input Capacitance
LOGIC INPUT (SCLK)2
Input Voltage Level
High
Full
Full
Full
Full
−ꢀ
−80
+ꢀ
−4ꢀ
μA
μA
kΩ
pF
26
2
Full
Full
1.22
0
2.1
0.6
V
V
Low
Rev. 0 | Page 6 of 36