Datasheet
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
6
6957f
For more information www.linear.com/LTC6957-1
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Inputs (IN
–
, IN
+
)
f
IN
Input Frequency Range
l
300 MHz
V
INSE
Input Signal Level Range, Single-Ended
l
0.2 0.8 2 V
P-P
V
INDIFF
Input Signal Level Range, Differential
l
0.2 0.8 2 V
P-P
t
MIN
Minimum Input Pulse Width High or Low 0.5 ns
V
INCM
Self-Bias Voltage, IN
+
, IN
–
l
1.8 2 2.3 V
R
IN
Input Resistance, Differential
l
1.5 2 2.5 kΩ
C
IN
Input Capacitance, Differential 0.5 pF
BW
IN
Input Section Small Signal Bandwidth FILTB = L, FILTA = L
FILTB = L, FILTA = H
FILTB = H, FILTA = L
FILTB = H, FILTA = H
1200
500
160
50
MHz
MHz
MHz
MHz
Outputs (LVDS)
V
OD
Output Differential Voltage
l
250 360 450 mV
∆V
OD
Delta V
OD
l
0.2 50 mV
V
OS
Output Offset Voltage
l
1.125 1.25 1.375 V
∆V
OS
Delta V
OS
l
1.5 50 mV
I
SC
Short-Circuit Current
l
3.9 6 mA
t
r
Output Rise Time 170 ps
t
f
Output Fall Time 170 ps
t
PD
Propagation Delay FILTB = L, FILTA = L
FILTB = L, FILTA = H
FILTB = H, FILTA = L
FILTB = H, FILTA = H
l
l
l
l
0.65 0.84
0.9
1.35
3.5
1.15
1.3
1.8
4.4
ns
ns
ns
ns
∆t
PD
/∆T Propagation Delay Variation Over Temperature FILTB = L, FILTA = L
FILTB = L, FILTA = H
FILTB = H, FILTA = L
FILTB = H, FILTA = H
l
l
l
l
0.5
0.6
0.7
1.8
ps/°C
ps/°C
ps/°C
ps/°C
∆t
PD
/∆V Propagation Delay Variation vs Supply Voltage FILTB = L, FILTA = L
l
5 60 ps/V
t
SKEW
Output Skew, Differential, CH1 to CH2
l
3 50 ps
Power
V
+
V
+
Operating Supply Voltage Range
l
3.15 3.3 3.45 V
I
S
Supply Current
Both Outputs Enabled (SD1 = SD2 = L)
One Output Enabled (SD1 = L, SD2 = H or SD1 = H, SD2 = L)
Both Outputs Disabled (SD1 = SD2 = H)
l
l
l
38
26
0.7
45
30
1.2
mA
mA
mA
t
ENABLE
Output Enable Time, Other SDx = L 300 ns
t
WAKEUP
Output Enable Time, Other SDx = H 400 ns
t
DISABLE
Output Disable Time, Other SDx = L 40 ns
t
SLEEP
Output Disable Time, Other SDx = H 50 ns
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 3.3V,
SD1 = SD2 = 0.4V, FILTA = FILTB = 0.4V, R
LOAD
= 110Ω differential, unless otherwise specified. All voltages are with respect to ground.
LTC6957-2