AD6645
DIGITAL SPECIFICATIONS
AVCC = 5 V, DVCC = 3.3 V; TMIN and TMAX at rated speed grade, unless otherwise noted.
Table 2.
Test
AD6645ASQ-80/AD6645ASV-80 AD6645ASQ-105/AD6645ASV-105
Parameter
Temp Level Min Typ
Max Min Typ
Max Unit
ENCODE INPUTS (ENCODE, ENCODE)
Differential Input Voltage1
Differential Input Resistance
Differential Input Capacitance
LOGIC OUTPUTS (D13 to D0, DRY, OVR)
Logic Compatibility
Full
2ꢀ°C
2ꢀ°C
IV
V
V
0.4
0.4
10
V p-p
kΩ
pF
10
2.ꢀ
2.ꢀ
CMOS
CMOS
Logic 1 Voltage (DVCC = 3.3 V)2
Logic 0 Voltage (DVCC = 3.3 V)2
Output Coding
Full
Full
II
II
2.8ꢀ DVCC − 2
0.2
2.8ꢀ DVCC − 2
0.2
V
V
0.ꢀ
0.ꢀ
Twos complement
DVCC/2
Twos complement
DVCC/2
DMID
Full
V
V
1
ENCODE
All ac specifications tested by driving ENCODE and
differentially.
2 Digital output logic levels: DVCC = 3.3 V, CLOAD = 10 pF. Capacitive loads >10 pF degrades performance.
AC SPECIFICATIONS
ENCODE
ENCODE
, TMIN and
All ac specifications tested by driving ENCODE and
MAX at rated speed grade, unless otherwise noted.
differentially. AVCC = 5 V, DVCC = 3.3 V; ENCODE,
T
Table 3.
AD6645ASQ-80/
AD6645ASV-80
AD6645ASQ-105/
AD6645ASV-105
Test
Parameter
Temp
Level
Min
Typ
Max
Min
Typ
Max
Unit
Conditions
SNR
Analog Input @ −1 dBFS
2ꢀ°C
Full
2ꢀ°C
Full
2ꢀ°C
2ꢀ°C
V
II
I
II
V
V
7ꢀ.0
72.ꢀ 74.ꢀ
7ꢀ.0
dB
dB
dB
dB
dB
dB
At 1ꢀ.ꢀ MHz
At 30.ꢀ MHz
At 37.7 MHz
At 70.0 MHz
At 1ꢀ0.0 MHz
At 200.0 MHz
72.ꢀ 74.ꢀ
72.0 73.ꢀ
73.0
72.0 73.ꢀ
73.0
72.0
72.0
SINAD
Analog Input @ −1 dBFS
2ꢀ°C
Full
2ꢀ°C
Full
2ꢀ°C
2ꢀ°C
V
II
I
V
V
V
7ꢀ.0
72.ꢀ 74.ꢀ
7ꢀ.0
dB
dB
dB
dB
dB
dB
At 1ꢀ.ꢀ MHz
At 30.ꢀ MHz
At 37.7 MHz
At 70.0 MHz
At 1ꢀ0.0 MHz
At 200.0 MHz
72.ꢀ 74.ꢀ
73.0
73.0
68.ꢀ
62.ꢀ
67.ꢀ
62.ꢀ
WORST HARMONIC (SECOND OR THIRD)
Analog Input @ −1 dBFS
2ꢀ°C
Full
2ꢀ°C
Full
2ꢀ°C
2ꢀ°C
V
II
I
V
V
V
93.0
8ꢀ.0 93.0
93.1
dBc
dBc
dBc
dBc
dBc
dBc
At 1ꢀ.ꢀ MHz
At 30.ꢀ MHz
At 37.7 MHz
At 70.0 MHz
At 1ꢀ0.0 MHz
At 200.0 MHz
8ꢀ.0 93.0
87.0
89.0
70.0
63.ꢀ
70.0
63.ꢀ
Rev. D | Page 4 of 24
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