Datasheet
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
12
6957f
For more information www.linear.com/LTC6957-1
Typical perForMance characTerisTics
Output Voltages vs Temperature Output Voltages vs Loading
Enable and Wakeup
Output Short-Circuit Current
vs Temperature Differential Output vs Frequency
Supply Current vs Temperature
Output Voltages vs Load Resistor
LTC6957-2
Input Self Bias Voltage
vs Temperature
TEMPERATURE (°C)
–55
1.90
INPUT VOLTAGE (V)
1.95
2.05
2.20
–35
–15 5
25
45 65
85 105
69571234 G19
2.00
2.15
2.10
125
V
+
= 3.15V
V
+
= 3.3V
V
+
= 3.45V
TEMPERATURE (°C)
–55
37.5
SUPPLY CURRENT (mA)
38.5
38.0
39.5
41.0
–35
–15 5
25
45 65
85 105
69571234 G21
39.0
40.5
40.0
125
V
+
= 3.3V
V
+
= 3.45V
V
+
= 3.15V
LOAD RESISTOR (Ω)
0
0.8
OUTPUT VOLTAGE (V)
1.2
1.0
1.6
1.8
50 100
150
200
69571234 G22
1.4
250
OUT
+
OUT
–
DC DATA,
IN
+
> (IN
–
+ 50mV)
V
+
= 3.6V
V
+
= 3.3V
V
+
= 3V
USE OF R
LOAD
> 150Ω
NOT RECOMMENDED
f
IN
MAY BE COMPROMISED
TEMPERATURE (°C)
–55
1.0
V
OH
, V
OL
AND V
OS
(V)
V
OD
(mV)
1.5
–35 –15 85 10545 655 25
69571234 G23
1.1
1.3
1.4
1.2
380
430
390
410
420
400
125
V
OH
(MEASURED)
V
OS
(CALCULATED)
V
OD
(CALCULATED)
V
OL
(MEASURED)
V
TEST
LOAD VOLTAGE (V)
0
1
OUTPUT VOLTAGE (V)
1.5
0.6 1.2 1.8
69571234 G24
1.4
1.2
1.3
1.1
2.4
OUT
+
OUT
–
LOAD STRESS PER TIA/EIA-644-A FIGURE 4
125°C
25°C
–55°C
20ns/DIV
3.0V
0V
1.5V
1.0V
1.5V
69571234 G25
2.0V
2.0V
1.0V
MULTIPLE EXPOSURES, PERSISTENCE MODE
CLOCK I/O = 120MHz
SD DRIVE ~ 140kHz, ASYNCHRONOUS
SD
ENABLE: OUTPUTS WITH
OTHER CHANNEL ON
WAKE-UP:
OUTPUTS WITH
OTHER
CHANNEL OFF
TEMPERATURE (°C)
–55
3.75
SHORT-CIRCUIT CURRENT (mA)
3.85
4.00
–35
–15 5
25
45 65
85 105
69571234 G26
3.80
3.95
3.90
125
V
+
= 3.15V
V
+
= 3.45V
V
+
= 3.3V
ANY ONE (1) OUTPUT
SHORTED TO GROUND
FREQUENCY (MHz)
0
0
DIFFERENTIAL OUTPUT (mV
P-P
)
300
400
900
200 400 600 800 1000
69571234 G27
800
200
600
700
500
100
1200
–55°C
125°C
25°C
10dBm INPUT
FILTA = FILTB = L
R
LOAD
= 100Ω
SUPPLY VOLTAGE (V)
0.6
0
SUPPLY CURRENT (mA)
5
15
45
0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
69571234 G20
10
25
20
35
30
40
3.63.3
T
A
= 25°C
T
A
= –55°C
T
A
= 125°C
Supply Current vs Supply Voltage