Datasheet
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
8
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 0.6 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 (CMOS)
V
OH
Output High Voltage No Load
–3mA Load
l
l
V
DD
– 0.1
V
DD
– 0.2
V
V
V
OL
Output Low Voltage No Load
3mA Load
l
l
0.1
0.2
V
V
t
r
Output Rise Time 320 ps
t
f
Output Fall Time 300 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
0.8 0.95
1
1.5
3.6
1.6
1.8
2.4
4.8
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
1.7
1.7
2
3
ps/°C
ps/°C
ps/°C
ps/°C
∆t
PD
/∆V Propagation Delay Variation vs Supply Voltage FILTB = FILTA = L, V
+
= V
DD
l
100 200 ps/V
t
SKEW
Output Skew, CH1 to CH2
LTC6957-3
LTC6957-4
l
l
5
120
35
250
ps
ps
Power
V
+
V
+
Operating Supply Voltage Range
l
3.15 3.3 3.45 V
V
DD
V
DD
Operating Supply Voltage Range V
DD
Must Be ≤V
+
l
2.4 3.3 3.45 V
I
S
Supply Current, Pin 2
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
24
24
0.7
27.5
27.5
1.2
mA
mA
mA
I
DD
Supply Current, Pin 11, No Load Static
Dynamic, per Output
l
l
0.001
0.056
0.01
0.07
mA
mA/MHz
t
ENABLE
Output Enable Time, Other SDx = L 200 ns
t
WAKEUP
Output Enable Time, Other SDx = H 300 ns
t
DISABLE
Output Disable Time, Other SDx = L 20 ns
t
SLEEP
Output Disable Time, Other SDx = H 20 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
+
= V
DD
= 3.3V, SD1 = SD2 = 0.4V, FILTA = FILTB = 0.4V, R
LOAD
= 480Ω to V
DD
/2, unless otherwise specified. All voltages are with
respect to ground.
LTC6957-3/LTC6957-4