LTC2252_15 Datasheet, PDF (3/24 Pages) Linear Technology – 12-Bit, 125/105Msps Low Power 3V ADCs

LTC2253/LTC2252
A ALOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T_A = 25°C. (Note 4)
SYMBOL
V_IN
V_IN,CM
I_IN
I_SENSE
I_MODE
t_AP
t_JITTER
CMRR
PARAMETER
Analog Input Range (A_IN+ – A_IN–)
Analog Input Common Mode
Analog Input Leakage Current
SENSE Input Leakage
MODE Pin Leakage
Sample-and-Hold Acquisition Delay Time
Sample-and-Hold Acquisition Delay Time Jitter
Analog Input Common Mode Rejection Ratio
Full Power Bandwidth
CONDITIONS
2.85V < V_DD < 3.4V (Note 7)
Differential Input (Note 7)
0V < A_IN+, A_IN– < V_DD
0V < SENSE < 1V
Figure 8 Test Circuit
MIN TYP MAX
●
±0.5V to ±1V
● 1 1.5 1.9
● –1
1
● –3
3
● –3
3
0
0.2
80
640
UNITS
V
V
µA
µA
µA
ns
ps_RMS
dB
MHz
DY A IC ACCURACY _{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)
SYMBOL
PARAMETER
CONDITIONS
LTC2253
LTC2252
MIN TYP MAX MIN TYP MAX
UNITS
SNR
Signal-to-Noise Ratio
5MHz Input
70.2
70.2
dB
30MHz Input
70.1
70.2
dB
70MHz Input
● 68
70
68.5 70.1
dB
140MHz Input
69.6
69.8
dB
SFDR
Spurious Free Dynamic Range
2nd or 3rd Harmonic
5MHz Input
30MHz Input
88
88
dB
85
88
dB
70MHz Input
● 72
82
71 84
dB
140MHz Input
78
79
dB
SFDR
Spurious Free Dynamic Range
4th Harmonic or Higher
5MHz Input
30MHz Input
90
90
dB
90
90
dB
70MHz Input
● 77
90
78 90
dB
140MHz Input
90
90
dB
S/(N+D)
Signal-to-Noise Plus
Distortion Ratio
5MHz Input
30MHz Input
69.8
70.1
dB
69.7
70.1
dB
70MHz Input
● 67
69.6
67.5 70
dB
140MHz Input
IMD
Intermodulation Distortion
f_IN1 = 28.2MHz,
f_IN2 = 26.8MHz
68.5
68.7
dB
85
85
dB
22532fa
3