AD6649 Analog Devices, AD6649 Datasheet - Page 5

• Manufacturer Part Number: AD6649
• Description: IF Diversity Receiver
• Manufacturer: Analog Devices

Data Sheet
ADC AC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS differential input,
DCS enabled, NCO enabled, FIR filter enabled, unless otherwise noted.
Table 2.
Parameter
SIGNAL-TO-NOISE RATIO (SNR)
SIGNAL-TO-NOISE AND DISTORTION (SINAD)
WORST SECOND OR THIRD HARMONIC
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
WORST OTHER HARMONIC OR SPUR
TWO-TONE SFDR
CROSSTALK
ANALOG INPUT BANDWIDTH
1
2
3
4
A −1.0 dBFS input level at the analog inputs corresponds to an output level of −2.5 dBFS when using the fixed-frequency NCO and 95 MHz FIR filter. When using the
tunable-frequency NCO and 100 MHz FIR filter, the output level is −1.3 dBFS. These respective output level reductions are due to FIR filter losses. See the FIR Filters
section for more details.
See the
SNR specifications are for filtered 95 MHz bandwidth.
Crosstalk is measured at 100 MHz with −1 dBFS on one channel and with no input on the alternate channel.
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
f
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 30 MHz
= 90 MHz
= 140 MHz
= 185 MHz
= 220 MHz
= 30 MHz
= 90 MHz
= 140 MHz
= 185 MHz
= 220 MHz
= 30 MHz
= 90 MHz
= 140 MHz
= 185 MHz
= 220 MHz
= 30 MHz
= 90 MHz
= 140 MHz
= 185 MHz
= 220 MHz
= 30 MHz
= 90 MHz
= 140 MHz
= 185 MHz
= 220 MHz
= 184.12 MHz, 187.12 MHz (−7 dBFS)
AN-835 Application
2
4
Note, Understanding High Speed ADC Testing and Evaluation, for a complete set of definitions.
3
Rev. A | Page 5 of 40
Temperature
25°C
25°C
25°C
25°C
Full
25°C
25°C
25°C
25°C
25°C
Full
25°C
25°C
25°C
25°C
25°C
Full
25°C
25°C
25°C
25°C
25°C
Full
25°C
25°C
25°C
25°C
25°C
Full
25°C
25°C
Full
25°C
1
1.75 V p-p full-scale input range,
70.9
68.7
80
Min
Typ
74.5
74.2
73.9
73.4
72.9
73.4
73.0
72.3
71.7
71.0
−92
−88
−85
−85
−89
92
88
85
85
84
−95
−94
−93
−93
−84
88
95
1000
−80
−80
Max
AD6649
Unit
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dB
MHz