Linear Technology LTC2170-12, Руководство пользователя, Страница: 4 / 34

LTC2172-12/
LTC2171-12/LTC2170-12
4
21721012fb
DynaMic accuracy
The
l
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. A
IN
= –1dBFS. (Note 5)
SYMBOL PARAMETER CONDITIONS
LTC2172-12 LTC2171-12 LTC2170-12
UNITS MIN TYP MAX MIN TYP MAX MIN TYP MAX
SNR Signal-to-Noise Ratio 5MHz Input
30MHz Input
70MHz Input
140MHz Input
l
69.7
71
71
70.9
70.6
69.5
70.9
70.8
70.8
70.5
69.3
70.5
70.5
70.5
70.2
dBFS
dBFS
dBFS
dBFS
SFDR Spurious Free Dynamic Range
2nd or 3rd Harmonic
5MHz Input
30MHz Input
70MHz Input
140MHz Input
l
77
90
90
89
84
79
90
90
89
84
79
90
90
89
84
dBFS
dBFS
dBFS
dBFS
Spurious Free Dynamic Range
4th Harmonic or Higher
5MHz Input
30MHz Input
70MHz Input
140MHz Input
l
85
90
90
90
90
85
90
90
90
90
85
90
90
90
90
dBFS
dBFS
dBFS
dBFS
S/(N+D) Signal-to-Noise Plus
Distortion Ratio
5MHz Input
30MHz Input
70MHz Input
140MHz Input
l
69.1
70.9
70.9
70.7
70.3
69.4
70.8
70.7
70.6
70.2
69.2
70.5
70.4
70.3
69.9
dBFS
dBFS
dBFS
dBFS
Crosstalk, Near Channel 10MHz Input (Note 12) –90 –90 –90 dBc
Crosstalk, Far Channel 10MHz Input (Note 12) –105 –105 –105 dBc
inTernal reFerence characTerisTics
The
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. A
IN
= –1dBFS. (Note 5)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CM
Output Voltage I
OUT
= 0 0.5 • V
DD
– 25mV 0.5 • V
DD
0.5 • V
DD
+ 25mV V
V
CM
Output Temperature Drift ±25 ppm/°C
V
CM
Output Resistance –600µA < I
OUT
< 1mA 4 Ω
V
REF
Output Voltage I
OUT
= 0 1.225 1.250 1.275 V
V
REF
Output Temperature Drift ±25 ppm/°C
V
REF
Output Resistance –400µA < I
OUT
< 1mA 7 Ω
V
REF
Line Regulation 1.7V < V
DD
< 1.9V 0.6 mV/V