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AD9481
Rev. 0 | Page 5 of 28
AC SPECIFICATIONS
AVDD = 3.3 V, DRVDD = 3.3 V; TMIN = 40°C, TMAX = +85°C, AIN = 1 dBFS, full scale = 1.0 V, internal reference, differential analog and
clock inputs, unless otherwise noted.
Table 3.
AD9481-250
Parameter
Temp
Test Level
Min
Typ
Max
Unit
SIGNAL-TO-NOISE RATIO (SNR)
fIN = 19.7 MHz
25°C
V
46
dB
fIN = 70.1 MHz
25°C
I
44.5
45.7
dB
SIGNAL-TO-NOISE AND DISTORTION (SINAD)
fIN = 19.7 MHz
25°C
V
45.9
dB
fIN = 70.1 MHz
25°C
I
44.4
45.7
dB
EFFECTIVE NUMBER OF BITS (ENOB)
fIN = 19.7 MHz
25°C
V
7.5
Bits
fIN = 70.1 MHz
25°C
I
7.2
7.5
Bits
WORST SECOND OR THIRD HARMONIC DISTORTION
fIN = 19.7 MHz
25°C
V
64.8
dBc
fIN = 70.1 MHz
25°C
I
64.8
54
dBc
WORST OTHER
fIN = 19.7 MHz
25°C
V
68
dBc
fIN = 70.1 MHz
25°C
I
65.8
56
dBc
SPURIOUS-FREE DYNAMIC RANGE (SFDR)
1fIN = 19.7 MHz
25°C
V
64.8
dBc
fIN = 70.1 MHz
25°C
I
64.8
54
dBc
TWO-TONE INTERMODULATION DISTORTION (IMD)
fIN1 = 69.3 MHz, fIN2 = 70.3 MHz
25°C
V
64.9
dBc
1 DC and Nyquist bin energy ignored.