LTC6957-3_15 Datasheet, PDF (14/36 Pages) Linear Technology – Low Phase Noise, Dual Output Buffer/Driver/ Logic Converter

LTC6957-1/LTC6957-2/
LTC6957-3/LTC6957-4
Typical Performance Characteristics LTC6957-3/LTC6957-4
Input Self Bias Voltage
vs Temperature
2.20
V⁺ = 3.45V
2.15
2.10
V⁺ = 3.3V
2.05
2.00
V⁺ = 3.15V
1.95
1.90
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
69571234 G37
Supply Current vs Supply Voltage
25
20
15
10
5
0
0
25°C
125°C
–55°C
0.6 1.2 1.8 2.4
V⁺ VOLTAGE (V)
3 3.6
69571234 G38
Output Voltages vs Load Current
V_DD
OUTPUT HIGH,
V_DD – 0.25
SOURCING CURRENT
V_DD – 0.5
V_DD – 0.75
0.50
V_DD = 3.6V
V_DD = 3.3V
V_DD = 3V
V_DD = 2.7V
V_DD = 2.4V
0.25
0
0
OUTPUT LOW,
SINKING CURRENT
5
10
15
20
LOAD CURRENT (mA)
69571234 G40
Output Voltages vs Load Current
V_DD
V_DD – 0.25
OUTPUT HIGH,
SOURCING CURRENT
V_DD – 0.5
V_DD– 0.75 _{VDD = 3.3V}
–55°C
125°C
25°C
0.50
OUTPUT LOW,
125°C
SINKING CURRENT
0.25
–55°C
25°C
0
0
5
10
15
20
LOAD CURRENT (mA)
69571234 G41
Supply Current vs Supply Voltage
5
4
3
2
1
25°C ^{–55°C}
125°C
0
0 0.6 1.2 1.8 2.4 3 3.6
V_DD VOLTAGE (V)
69571234 G43
Supply Current vs Temperature
21
100
V⁺ = V_DD = 3.3V
20
10
DYNAMIC, ONE (1)
OUTPUT ACTIVE AT 312.5MHz,
19
13pF LOAD, LEFT AXIS
OTHER OUTPUT DISABLED
1
18
0.1
STATIC, NO DC LOAD,
RIGHT (LOGARITHMIC)
AXIS
17
0.01
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
69571234 G44
14
For more information www.linear.com/LTC6957-1
Supply Current vs Temperature
21.5
V⁺ = 3.45V
21.0
20.5 _{V+ = 3.3V}
20.0 V⁺ = 3.15V
19.5
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
69571234 G39
Additive Phase Noise
vs Supply Voltage
–130
SINGLE-ENDED SINE WAVE INPUT,
–135 ^1V0₊^{0=M3H.3zVa,tV7}_D^d_D^{BmAS(5S0H0OmWVNRMS)}
FILTA = FILTB = L
–140
–145
–150
2.4V
2.7V
–155
–160
3.0V
3.3V
–165
100
1k
10k
100k
1M
OFFSET FREQUENCY (Hz)
69571234 G42
Output Voltage Swing
vs Frequency
3.0
2.5 ^{–55°C} _25°C
125°C
CAUTION: AT VERY
HIGH FREQUENCIES,
THE CMOS OUTPUTS
MAY NOT TOGGLE
2.0
AT ALL DEPENDING
ON INPUT FREQ-
UENCY, AMPLITUDE,
SUPPLY VOLTAGE,
OR TEMPERATURE
1.5 10dBm INPUT
FILTA = FILTB = L
IN DC1766A
R_LOAD = 133Ω AC-COUPLED
1
0 100 200 300 400 500 600 700 800 900 1000
FREQUENCY (MHz)
69571234 G45
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