Datasheet

AD9572
Rev. B | Page 7 of 20
CONTROL PINS
Typical (typ) is given for V
S
= 3.3 V ± 10%, T
A
= 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given
over full V
S
and T
A
(−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(V
S
) +
0.2
V
Logic 0 Voltage
1/3(V
S
) −
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 V
S
= 3.3 V ± 10%, T
A
= 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given
over full V
S
and T
A
(−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 V
S
= 3.3 V ± 10%, T
A
= 25°C, unless otherwise noted. Minimum (min) and maximum (max) values are given
over full V
S
and T
A
(−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