AD9571
Rev. 0 | 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 k pull-up resistor.
Logic 1 Voltage
2.0
V
Logic 0 Voltage
0.8
V
Logic 1 Current
1.0
A
Logic 0 Current
155
A
FREQSEL Pin
FREQSEL has a 150 k pull-up resistor and a
100 k 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
A
Logic 0 Current
30
A
FORCE_LOW Pin
FORCE_LOW has a 16 k pull-down resistor.
Logic 1 Voltage
2.0
V
Logic 0 Voltage
0.8
V
Logic 1 Current
240
A
Logic 0 Current
2.0
A
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
480
600
mW
LVPECL Power Dissipation
690
860
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
Load Capacitance
14
pF
Phase Noise
135
dBc/Hz
@1 kHz offset
Stability
30
+30
ppm