Datasheet

LTC2145-14/
LTC2144-14/LTC2143-14
4
21454314fa
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
–
) 1.7V < V
DD
< 1.9V
l
1 to 2 V
P-P
V
IN(CM)
Analog Input Common Mode (A
IN
+
+ A
IN
–
)/2 Differential Analog Input (Note 8)
l
0.7 V
CM
1.25 V
V
SENSE
External Voltage Reference Applied to SENSE External Reference Mode
l
0.625 1.250 1.300 V
I
INCM
Analog Input Common Mode Current Per Pin, 125Msps
Per Pin, 105Msps
Per Pin, 80Msps
155
130
100
µA
µA
µA
I
IN1
Analog Input Leakage Current (No Encode) 0 < A
IN
+
, A
IN
–
< V
DD
l
–1.5 1.5 µA
I
IN2
PAR/SER Input Leakage Current 0 < PAR/SER < V
DD
l
–3 3 µA
I
IN3
SENSE Input Leakage Current 0.625 < SENSE < 1.3V
l
–3 3 µA
t
AP
Sample-and-Hold Acquisition Delay Time 0 ns
t
JITTER
Sample-and-Hold Acquisition Delay Jitter Single-Ended Encode
Differential Encode
0.08
0.10
ps
RMS
ps
RMS
CMRR Analog Input Common Mode Rejection Ratio 80 dB
BW-3B Full-Power Bandwidth Figure 6 Test Circuit 750 MHz
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
LTC2145-14 LTC2144-14 LTC2143-14
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
Resolution (No Missing Codes)
l
14 14 14 Bits
Integral Linearity Error Differential Analog Input (Note 6)
l
–2.6 ±1 2.6 –2.6 ±1 2.6 –2.6 ±1 2.6 LSB
Differential Linearity Error Differential Analog Input
l
–0.9 ±0.3 0.9 –0.9 ±0.3 0.9 –0.8 ±0.3 0.8 LSB
Offset Error (Note 7)
l
–9 ±1.5 9 –9 ±1.5 9 –9 ±1.5 9 mV
Gain Error Internal Reference
External Reference
l
–1.8
±1.5
–0.4 0.9 –1.5
±1.5
–0.3 1.1 –1.5
±1.5
–0.3 1.1
%FS
%FS
Offset Drift ±10 ±10 ±10 µV/°C
Full-Scale Drift Internal Reference
External Reference
±30
±10
±30
±10
±30
±10
ppm/°C
ppm/°C
Gain Matching ±0.2 ±0.2 ±0.2 %FS
Offset Matching ±1.5 ±1.5 ±1.5 mV
Transition Noise 1.25 1.28 1.20 LSB
RMS