Datasheet

Data Sheet ADF4157
Rev. D | Page 7 of 24
TSSOP
Pin No.
LFCSP
Pin No. Mnemonic Description
15 16, 17 DV
DD
Positive Power Supply for the Digital Section. Decoupling capacitors to the digital ground
plane should be placed as close as possible to this pin. DV
DD
has a value of 3 V ± 10%. DV
DD
must have the same voltage as AV
DD
.
16 18 V
P
Charge Pump Power Supply. This should be greater than or equal to V
DD
. In systems where V
DD
is 3 V, it can be set to 5.5 V and used to drive a VCO with a tuning range of up to 5.5 V.
N/A 21 (EPAD) Exposed Pad
(EPAD)
It is recommended that the exposed pad be thermally connected to a copper plane for
enhanced thermal performance. The pad should be connected to AGND.