Datasheet

LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
14
6957f
For more information www.linear.com/LTC6957-1
Typical perForMance characTerisTics
Additive Phase Noise
vs Supply Voltage
Input Self Bias Voltage
vs Temperature Supply Current vs Temperature
Output Voltages vs Load Current
Supply Current vs Temperature
Output Voltage Swing
vs Frequency
LTC6957-3/LTC6957-4
Output Voltages vs Load Current
TEMPERATURE (°C)
–55
1.90
INPUT VOLTAGE (V)
1.95
2.05
2.20
–35
–15 5
25
45 65
85 105
69571234 G37
2.00
2.15
2.10
125
V
+
= 3.3V
V
+
= 3.45V
V
+
= 3.15V
TEMPERATURE (°C)
–55
17
V
DD
SUPPLY CURRENT (mA)
V
DD
SUPPLY CURRENT (µA)
18
19
21
–35 –15 5 85 105
69571234 G44
20
0.01
0.1
1
100
10
125
25 45 65
DYNAMIC, ONE (1)
OUTPUT ACTIVE AT 312.5MHz,
13pF LOAD, LEFT AXIS
OTHER OUTPUT DISABLED
STATIC, NO DC LOAD,
RIGHT (LOGARITHMIC)
AXIS
V
+
= V
DD
= 3.3V
FREQUENCY (MHz)
0
1
OUTPUT SWING (V
P-P
)
3.0
100 200 300 400 500 600 700 800 900
69571234 G45
1.5
2.5
2.0
1000
–55°C
125°C
25°C
CAUTION: AT VERY
HIGH FREQUENCIES,
THE CMOS OUTPUTS
MAY NOT TOGGLE
AT ALL DEPENDING
ON INPUT FREQ-
UENCY, AMPLITUDE,
SUPPLY VOLTAGE,
OR TEMPERATURE
10dBm INPUT
FILTA = FILTB = L
IN DC1766A
R
LOAD
= 133Ω AC-COUPLED
TEMPERATURE (°C)
–55
19.5
V
+
SUPPLY CURRENT (mA)
20.0
21.5
–35
–15 5
25
45 65
85 105
69571234 G39
21.0
20.5
125
V
+
= 3.3V
V
+
= 3.15V
V
+
= 3.45V
Supply Current vs Supply Voltage
Supply Current vs Supply Voltage
V
+
VOLTAGE (V)
0
0
V
+
SUPPLY CURRENT (mA)
5
15
25
0.6
1.2 1.8
2.4 3
69571234 G38
10
20
3.6
–55°C
25°C
125°C
V
DD
VOLTAGE (V)
0
0
V
DD
CURRENT (mA)
1
3
5
0.6
1.2 1.8
2.4 3
69571234 G43
2
4
3.6
125°C
25°C
–55°C
LOAD CURRENT (mA)
0
0
OUTPUT VOLTAGE (V)
0.50
0.25
V
DD
– 0.25
V
DD
5 10 15
69571234 G40
V
DD
– 0.5
V
DD
– 0.75
20
OUTPUT LOW,
SINKING CURRENT
OUTPUT HIGH,
SOURCING CURRENT
V
DD
= 3.6V
V
DD
= 3.3V
V
DD
= 3V
V
DD
= 2.7V
V
DD
= 2.4V
LOAD CURRENT (mA)
0
0
OUTPUT VOLTAGE (V)
0.50
0.25
V
DD
– 0.25
V
DD
5 10 15
69571234 G41
V
DD
– 0.5
20
OUTPUT LOW,
SINKING CURRENT
OUTPUT HIGH,
SOURCING CURRENT
–55°C
V
DD
= 3.3V
125°C
125°C
–55°C
25°C
25°C
V
DD
– 0.75
OFFSET FREQUENCY (Hz)
100
–165
PHASE NOISE (dBc/Hz)
–145
–140
–130
1k 10k 100k
69571234 G42
–135
–160
–150
–155
1M
3.0V
2.4V
2.7V
3.3V
SINGLE-ENDED SINE WAVE INPUT,
100MHz at 7dBm (500mV
RMS
)
V
+
= 3.3V, V
DD
AS SHOWN
FILTA = FILTB = L