Datasheet
LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
10
6957f
For more information www.linear.com/LTC6957-1
Typical perForMance characTerisTics
Supply Current vs Temperature
Enable and Wakeup Typical Distribution of Skew
Input Self Bias Voltage
vs Temperature Supply Current vs Temperature
Output Voltage vs Load Current
LTC6957-1
TEMPERATURE (°C)
–55
1.90
INPUT VOLTAGE (V)
2.05
2.15
2.20
–35
–15
5 25
45
65 85
105
69571234 G01
2.10
125
1.95
2.00
V
+
= 3.45V
V
+
= 3.3V
V
+
= 3.15V
SUPPLY VOLTAGE (V)
0.6
0
SUPPLY CURRENT (mA)
6
10
20
0.9
1.2
1.5 1.8
2.1
2.4 2.7
3.0
69571234 G02
8
14
12
18
16
3.63.3
2
4
T
A
= 125°C
T
A
= –55°C
T
A
= 25°C
NO OUTPUT LOADS
LOAD CURRENT (mA)
–10
1.35
OUTPUT VOLTAGE (V)
1.50
1.60
2.55
2.50
–8
–6 –4
–2
69571234 G04
1.55
2.35
2.30
2.45
2.40
0
1.40
1.45
V
OL
V
OH
TEMPERATURE (°C)
–55
46
SUPPLY CURRENT (mA)
48
52
58
–35
–15 5
25
45 65
85 105
69571234 G06
50
56
54
125
V
+
= 3.3V
V
+
= 3.15V
V
+
= 3.45V
50Ω “Y” LOAD TO GROUND
ON BOTH CHANNELS
20ns/DIV
3.0V
0V
2.5V
1.5V
1.5V
69571234 G07
2.0V
2.0V
2.5V
MULTIPLE EXPOSURES, PERSISTENCE MODE
CLOCK I/O = 120MHz
SD DRIVE ~ 140kHz, ASYNCHRONOUS
WAKE-UP:
OUTPUTS WITH
OTHER CHANNEL OFF
ENABLE: OUTPUTS WITH
OTHER CHANNEL ON
SD
t
SKEW
(ps)
0
NUMBER OF UNITS
100
69571234 G08
80
60
40
20
10
–8–10
–6 –4
–2
0 2
4 6
8
PRODUCTION DATA,
1ps RESOLUTION, ~1-2ps UNCERTAINTY
2 LOTS, 400
UNITS EACH,
3 TEMPERATURES
OUT1+ TO OUT2+ RISING EDGE
TYPICAL OF ALL OUTPUT EDGES/PAIRS
= 125°C
= 25°C
= –55°C
Supply Current vs Supply Voltage
Output Voltage vs Temperature
Differential Output vs Frequency
FREQUENCY (MHz)
0
0
DIFFERENTIAL OUTPUT (V
P-P
)
0.2
1.2
1.8
250
500 750
1000
1250 1500
1750
69571234 G09
1.0
1.6
1.4
0.8
0.6
0.4
2000
–55°C
125°C
25°C
0dBm INPUT
TEMPERATURE (°C)
–55
16.6
SUPPLY CURRENT (mA)
17.2
17.8
18.6
–35
–15
5 25
45
65 85
105
69571234 G03
17.4
18.2
18.0
18.8
18.4
125
16.8
17.0
V
+
= 3.3V
V
+
= 3.15V
V
+
= 3.45V
NO OUTPUT LOADS
TEMPERATURE (°C)
–55
1.4
OUTPUT VOLTAGE (V)
2.4
–35 –15 5 25 45 65 85 105 125
69571234 G05
1.6
2.2
V
OL
V
OH
V
+
= 3.3V
50Ω LOADS TO 1.3V