
3
LTC1745
1745f
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SNR
Signal-to-Noise Ratio
5MHz Input Signal (2V Range)
71
dBFS
5MHz Input Signal (3.2V Range)
q
71
72.5
dBFS
30MHz Input Signal (2V Range)
71
dBFS
30MHz Input Signal (3.2V Range)
72
dBFS
70MHz Input Signal (2V Range)
70
dBFS
70MHz Input Signal (3.2V Range)
71.5
dBFS
SFDR
Spurious Free Dynamic Range
5MHz Input Signal (2V Range)
96
dB
5MHz Input Signal (3.2V Range)
q
78
91
dB
30MHz Input Signal (2V Range)
93.5
dB
30MHz Input Signal (3.2V Range)
87
dB
70MHz Input Signal (2V Range)
79
dB
70MHz Input Signal (3.2V Range)
70.5
dB
S/(N + D)
Signal-to-(Noise + Distortion) Ratio
5MHz Input Signal (2V Range)
71
dBFS
5MHz Input Signal (3.2V Range)
q
71
72.5
dBFS
30MHz Input Signal (2V Range)
71
dBFS
30MHz Input Signal (3.2V Range)
72
dBFS
70MHz Input Signal (2V Range)
69.5
dBFS
70MHz Input Signal (3.2V Range)
68.5
dBFS
THD
Total Harmonic Distortion
5MHz Input Signal, First 5 Harmonics (2V Range)
– 92
dB
5MHz Input Signal, First 5 Harmonics (3.2V Range)
– 90
dB
30MHz Input Signal, First 5 Harmonics (2V Range)
– 91.5
dB
30MHz Input Signal, First 5 Harmonics (3.2V Range)
– 86.5
dB
70MHz Input Signal, First 5 Harmonics (2V Range)
–77.5
dB
70MHz Input Signal, First 5 Harmonics (3.2V Range)
–70
dB
IMD
Intermodulation Distortion
fIN1 = 4MHz, fIN2 = 5.1MHz (2V Range)
85
dBc
fIN1 = 4MHz, fIN2 = 5.1MHz (3.2V Range)
84
dBc
Sample-and-Hold Bandwidth
RSOURCE = 50
240
MHz
The q indicates specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5)
DY A IC ACCURACY
U
W
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCM Output Voltage
IOUT = 0
2.29
2.35
2.41
V
VCM Output Tempco
IOUT = 0
±30
ppm/
°C
VCM Line Regulation
4.75V
≤ VDD ≤ 5.25V
3
mV/V
VCM Output Resistance
1mA
≤ IOUT ≤ 1mA
4
(Note 5)
I TER AL REFERE CE CHARACTERISTICS
UU
U