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AD6645 Datasheet PDF : 24 Pages
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AD6645
DIGITAL SPECIFICATIONS
AVCC = 5 V, DVCC = 3.3 V; TMIN and TMAX at rated speed grade, unless otherwise noted.
Table 2.
Parameter
ENCODE INPUTS (ENCODE, ENCODE)
Differential Input Voltage1
Differential Input Resistance
Differential Input Capacitance
LOGIC OUTPUTS (D13 to D0, DRY, OVR)
Logic Compatibility
Logic 1 Voltage (DVCC = 3.3 V)2
Logic 0 Voltage (DVCC = 3.3 V)2
Output Coding
DMID
Temp
Full
25°C
25°C
Full
Full
Full
Test
Level
IV
V
V
II
II
V
AD6645ASQ-80/AD6645ASV-80
Min Typ
Max
0.4
10
2.5
CMOS
2.85 DVCC − 2
0.2
0.5
Twos complement
DVCC/2
AD6645ASQ-105/AD6645ASV-105
Min Typ
Max
0.4
10
2.5
CMOS
2.85 DVCC − 2
0.2
0.5
Twos complement
DVCC/2
Unit
V p-p
kΩ
pF
V
V
V
1 All ac specifications tested by driving ENCODE and ENCODE differentially.
2 Digital output logic levels: DVCC = 3.3 V, CLOAD = 10 pF. Capacitive loads >10 pF degrades performance.
AC SPECIFICATIONS
All ac specifications tested by driving ENCODE and ENCODE differentially. AVCC = 5 V, DVCC = 3.3 V; ENCODE, ENCODE, TMIN and
TMAX at rated speed grade, unless otherwise noted.
Table 3.
Parameter
SNR
Analog Input @ −1 dBFS
SINAD
Analog Input @ −1 dBFS
WORST HARMONIC (SECOND OR THIRD)
Analog Input @ −1 dBFS
AD6645ASQ-80/ AD6645ASQ-105/
Test
AD6645ASV-80
AD6645ASV-105
Temp Level Min Typ Max Min Typ Max Unit Conditions
25°C V
Full II
25°C I
Full II
25°C V
25°C V
75.0
72.5 74.5
72.0 73.5
73.0
72.0
75.0
72.5 74.5
72.0 73.5
73.0
72.0
dB At 15.5 MHz
dB At 30.5 MHz
dB At 37.7 MHz
dB At 70.0 MHz
dB At 150.0 MHz
dB At 200.0 MHz
25°C V
Full II
25°C I
Full V
25°C V
25°C V
75.0
72.5 74.5
73.0
68.5
62.5
75.0
72.5 74.5
73.0
67.5
62.5
dB At 15.5 MHz
dB At 30.5 MHz
dB At 37.7 MHz
dB At 70.0 MHz
dB At 150.0 MHz
dB At 200.0 MHz
25°C V
Full II
25°C I
Full V
25°C V
25°C V
93.0
85.0 93.0
89.0
70.0
63.5
93.1
85.0 93.0
87.0
70.0
63.5
dBc At 15.5 MHz
dBc At 30.5 MHz
dBc At 37.7 MHz
dBc At 70.0 MHz
dBc At 150.0 MHz
dBc At 200.0 MHz
Rev. D | Page 4 of 24
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