Datasheet
3
215814f
LTC2158-14
converTer characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes)
l
14 Bits
Integral Linearity Error Differential Analog Input (Note 6)
l
–7.5 ±1.2 7.5 LSB
Differential Linearity Error Differential Analog Input
l
–1 ±0.35 1 LSB
Offset Error (Note 7)
l
–15 ±5 15 mV
Gain Error Internal Reference
External Reference
l
–4.5
±1.5
±1
3
%FS
%FS
Offset Drift ±20 µV/°C
Full-Scale Drift Internal Reference
External Reference
±30
±10
ppm/°C
ppm/°C
Transition Noise 2.11 LSB
RMS
analog inpuT
The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (A
IN
+
– A
IN
–
) 1.74V < V
DD
< 1.9V
l
1.32 V
P-P
V
IN(CM)
Analog Input Common Mode (A
IN
+
+ A
IN
–
)/2 Differential Analog Input (Note 8)
l
V
CM
– 20mV V
CM
V
CM
+ 20mV V
V
SENSE
External Voltage Reference Applied to SENSE External Reference Mode
l
1.230 1.250 1.270 V
I
IN1
Analog Input Leakage Current 0 < A
IN
+
, A
IN
–
< V
DD
, No Encode
l
–1 1 µA
I
IN2
PAR/SER Input Leakage Current 0 < PAR/SER < V
DD
l
–1 1 µA
I
IN3
SENSE Input Leakage Current 1.23V < SENSE < 1.27V
l
–1 1 µA
t
AP
Sample-and-Hold Acquisition Delay Time 1 ns
t
JITTER
Sample-and-Hold Acquisition Delay Jitter 0.15 ps
RMS
CMRR Analog Input Common Mode Rejection Ratio 75 dB
BW-3B Full-Power Bandwidth 1250 MHz
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 MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 15MHz Input
70MHz Input
140MHz Input
l
66
68.8
68.4
67.7
dBFS
dBFS
dBFS
SFDR Spurious Free Dynamic Range 2nd or 3rd
Harmonic
15MHz Input
70MHz Input
140MHz Input
l
70
88
85
79
dBFS
dBFS
dBFS
Spurious Free Dynamic Range 4th Harmonic
or Higher
15MHz Input
70MHz Input
140MHz Input
l
80
98
95
90
dBFS
dBFS
dBFS
S/(N+D) Signal-to-Noise Plus Distortion Ratio 15MHz Input
70MHz Input
140MHz Input
l
65
68.7
68.4
67.2
dBFS
dBFS
dBFS
Crosstalk Crosstalk Between Channels Up to 315MHz Input –95 dB