Datasheet
LTC2355-12/LTC2355-14
3
2355fa
Dynamic accuracy
The l denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C with external reference = 2.55V. V
DD
= 3.3V.
analog input
The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. With internal reference. V
DD
= 3.3V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Differential Input Range (Notes 3, 8, 9) 3.1V ≤ V
DD
≤ 3.6V
l
0 to 2.5 V
V
CM
Analog Common Mode + Differential
Input Range (Note 10)
0 to V
DD
V
I
IN
Analog Input Leakage Current
l
1 µA
C
IN
Analog Input Capacitance (Note 19) 13 pF
t
ACQ
Sample-and-Hold Acquisition Time (Note 6)
l
39 ns
t
AP
Sample-and-Hold Aperture Delay Time 1 ns
t
JITTER
Sample-and-Hold Aperture Delay Time Jitter 0.3 ps
CMRR Analog Input Common Mode Rejection Ratio f
IN
= 1MHz, V
IN
= 0V to 3V
f
IN
= 100MHz, V
IN
= 0V to 3V
–60
–15
dB
dB
SYMBOL PARAMETER CONDITIONS
LTC2355-12 LTC2355-14
UNITSMIN TYP MAX MIN TYP MAX
SINAD Signal-to-Noise Plus
Distortion Ratio
100kHz Input Signal
1.4MHz Input Signal
l
69
71.1
71.1
71
74.2
73.8
dB
dB
THD Total Harmonic
Distortion
100kHz First 5 Harmonics
1.4MHz First 5 Harmonics
l
–86
–82
–76
–86
–82
–78
dB
dB
SFDR Spurious Free
Dynamic Range
100kHz Input Signal
1.4MHz Input Signal
86
82
86
82
dB
dB
IMD Intermodulation
Distortion
1.25V to 2.5V 1.25MHz into A
IN
+
, 0V to 1.25V,
1.2MHz into A
IN
–
–82 –82 dB
dB
Code-to-Code
Transition Noise
V
REF
= 2.5V (Note 18) 0.25 1 LSB
RMS
Full Power Bandwidth V
IN
= 2.5V
P-P
, SDO = 11585LSB
P-P
(Note 15) 50 50 MHz
Full Linear Bandwidth S/(N + D) ≥ 68dB 5 5 MHz
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0 2.5 V
V
REF
Output Tempco 15 ppm/°C
V
REF
Line Regulation V
DD
= 3.1V to 3.6V, V
REF
= 2.5V 600 µV/V
V
REF
Output Resistance Load Current = 0.5mA 0.2 Ω
V
REF
Settling Time C
REF
= 10µF 2 ms
External V
REF
Input Range 2.55 V
DD
V
internal reFerence characteristics
The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C, V
DD
= 3.3V.