AD9572
Rev. B | Page 7 of 20
CONTROL PINS
Typical (typ) is given for VS = 3.3 V ± 10%, TA = 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given
over full VS and TA (40°C to +85°C) variation.
Table 8.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
INPUT CHARACTERISTICS
REFSEL Pin
REFSEL has a 30 kΩ pull-up resistor.
Logic 1 Voltage
2.0
V
Logic 0 Voltage
0.8
V
Logic 1 Current
1.0
μA
Logic 0 Current
155
μA
FREQSEL Pin
FREQSEL has a 150 kΩ pull-up resistor and a 100 kΩ
pull-down resistor.
Logic 1 Voltage
2/3(VS) +
0.2
V
Logic 0 Voltage
1/3(VS)
0.2
V
Logic 1 Current
45
μA
Logic 0 Current
30
μA
FORCE_LOW Pin
FORCE_LOW has a 16 kΩ pull-down resistor.
Logic 1 Voltage
2.0
V
Logic 0 Voltage
0.8
V
Logic 1 Current
240
μA
Logic 0 Current
2.0
μA
POWER
Typical (typ) is given for VS = 3.3 V ± 10%, TA = 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given
over full VS and TA (40°C to +85°C) variation.
Table 9.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
Power Supply
3.0
3.3
3.6
V
LVDS Power Dissipation
715
870
mW
LVPECL Power Dissipation
1075
1305
mW
CRYSTAL OSCILLATOR
Typical (typ) is given for VS = 3.3 V ± 10%, TA = 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given
over full VS and TA (40°C to +85°C) variation.
Table 10.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
CRYSTAL SPECIFICATION
Fundamental mode
Frequency
25
MHz
ESR
50
Ω
Load Capacitance
14
pF
Phase Noise
135
dBc/Hz
At 1 kHz offset
Stability
30
+30
ppm