Datasheet

LTC2255/LTC2254
3
22554fa
LTC2255 LTC2254
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 5MHz Input 72.4 72.5 dB
30MHz Input 72.3 72.4 dB
70MHz Input ● 68.9 72.1 69.4 72.3 dB
140MHz Input 71.7 71.7 dB
SFDR 5MHz Input 88 88 dB
30MHz Input 85 88 dB
70MHz Input ● 73 82 71 84 dB
140MHz Input 78 80 dB
SFDR 5MHz Input 90 90 dB
30MHz Input 90 90 dB
70MHz Input ● 77 90 79 90 dB
140MHz Input 90 90 dB
S/(N+D) 5MHz Input 72.2 72.4 dB
30MHz Input 72 72.2 dB
70MHz Input ● 68 71.9 68.5 72 dB
140MHz Input 70.2 70.6 dB
IMD Intermodulation f
IN1
= 28.2MHz 85 85 dB
Distortion f
IN2
= 26.8MHz
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (A
IN
+
–A
IN
–
) 2.85V < V
DD
< 3.4V (Note 7) ● ±0.5V to ±1V V
V
IN,CM
Analog Input Common Mode Differential Input (Note 7) ● 1 1.5 1.9 V
I
IN
Analog Input Leakage Current 0V < A
IN
+
, A
IN
–
< V
DD
● –1 1 µA
I
SENSE
SENSE Input Leakage 0V < SENSE < 1V ● –3 3 µA
I
MODE
MODE Pin Leakage ● –3 3 µA
t
AP
Sample-and-Hold Acquisition Delay Time 0 ns
t
JITTER
Sample-and-Hold Acquisition Delay Time Jitter 0.2 ps
RMS
CMRR Analog Input Common Mode Rejection Ratio 80 dB
Full Power Bandwidth Figure 8 Test Circuit 640 MHz
The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. A
IN
= –1dBFS. (Note 4)
A ALOG I PUT
UU
DY A IC ACCURACY
U
W
The ● denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 4)
Signal-to-Noise Plus
Distortion Ratio
Spurious Free Dynamic Range
4th Harmonic or Higher
Spurious Free Dynamic Range
2nd or 3rd Harmonic