Datasheet

LTC2268-14/
LTC2267-14/LTC2266-14
4
22687614fa
DigiTal 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
LTC2268-14 LTC2267-14 LTC2266-14
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
SNR Signal-to-Noise Ratio 5MHz Input
70MHz Input
140MHz Input
l
71.4
73.1
73
72.6
70.8
73
72.9
72.6
71
73
72.9
72.5
dBFS
dBFS
dBFS
SFDR Spurious Free Dynamic Range
2
nd
or 3
rd
Harmonic
5MHz Input
70MHz Input
140MHz Input
l
75
88
85
82
76
88
85
82
76
88
85
82
dBFS
dBFS
dBFS
Spurious Free Dynamic Range
4
th
Harmonic or Higher
5MHz Input
70MHz Input
140MHz Input
l
84
90
90
90
83
90
90
90
85
90
90
90
dBFS
dBFS
dBFS
S/(N+D) Signal-to-Noise Plus Distortion
Ratio
5MHz Input
70MHz Input
140MHz Input
l
70.5
73
72.6
72
70.2
73
72.6
72
70.4
72.9
72.6
72
dBFS
dBFS
dBFS
Crosstalk 10MHz Input –105 –105 –105 dBc
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CM
Output Voltage I
OUT
= 0
0.5 • V
DD
– 25mV 0.5 • V
DD
0.V
DD
+ 25mV V
V
CM
Output Temperature Drift
±25
ppm/°C
V
CM
Output Resistance –600µA < I
OUT
< 1mA 4 Ω
V
REF
Output Voltage I
OUT
= 0 1.225 1.25 1.275 V
V
REF
Output Temperature Drift
±25
ppm/°C
V
REF
Output Resistance –400µA < I
OUT
< 1mA 7 Ω
V
REF
Line Regulation 1.7V < V
DD
< 1.9V 0.6 mV/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. A
IN
= –1dBFS. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ENCODE INPUTS (ENC
+
, ENC
–
)
DIFFERENTIAL ENCODE MODE (ENC
–
NOT TIED TO GND)
V
ID
Differential Input Voltage (Note 8)
l
0.2 V
V
ICM
Common Mode Input Voltage Internally Set
Externally Set (Note 8)
l
1.1
1.2
1.6
V
V
V
IN
Input Voltage Range ENC
+
, ENC
–
to GND
l
0.2 3.6 V
R
IN
Input Resistance (See Figure 10) 10 kΩ
C
IN
Input Capacitance 3.5 pF
SINGLE-ENDED ENCODE MODE (ENC
–
TIED TO GND)
V
IH
High Level Input Voltage V
DD
=1.8V
l
1.2 V
V
IL
Low Level Input Voltage V
DD
=1.8V
l
0.6 V
V
IN
Input Voltage Range ENC
+
to GND
l
0 3.6 V
R
IN
Input Resistance (See Figure 11) 30 kΩ
C
IN
Input Capacitance 3.5 pF
DigiTal inpuTs anD ouTpuTs
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)