Datasheet

Data Sheet ADF4193
Rev. F | Page 7 of 32
Pin No. Mnemonic Description
23 R
SET
Connecting a resistor between this pin and GND sets the charge pump output current. The nominal voltage bias at
the R
SET
pin is 0.55 V. The relationship between I
CP
and R
SET
is
I
CP
= 0.25/R
SET
So, with R
SET
= 2.4 kΩ, I
CP
= 104 µA.
24 V
P
2 Power Supply Pin for the Charge Pump. Nominally 5 V, should be at the same voltage at V
P
1. A 0.1 µF decoupling
capacitor to ground should be placed as close as possible to this pin.
25 AIN− Differential Amplifier’s Negative Input Pin.
26 CP
OUT−
Differential Charge Pumps Negative Output Pin. Should be connected to AIN− and the loop filter.
27 SW2 Fast Lock Switch 2. This switch is closed to SW
GND
while the SW1/SW2 timeout counter is active.
28 SW
GND
Common for SW1 and SW2 Switches. Should be connected to the ground plane.
29
SW1
Fast Lock Switch 1. This switch is closed to SW
GND
while the SW1/SW2 timeout counter is active.
30 CP
OUT+
Differential Charge Pumps Positive Output Pin. Should be connected to AIN+ and the loop filter.
31 AIN+ Differential Amplifiers Positive Input Pin.
32 V
P
3 Power Supply Pin for the Differential Amplifier. This can range from 5.0 V to 5.5 V. A 0.1 µF decoupling capacitor to
ground should be placed as close as possible to this pin. Also requires a 10 µF decoupling capacitor to ground.
EP Exposed Pad. The exposed pad must be connected to AGND.