ADF4210/ADF4211/ADF4212/ADF4213
PIN FUNCTION DESCRIPTIONS
Pin Number
TSSOP
Mnemonic
DD1
Function
1
V
Power Supply for the RF Section. Decoupling capacitors to the ground plane should be placed as
close as possible to this pin. VDD1 should have a value of between 2.7 V and 5.5 V. VDD1 must have
the same potential as VDD2.
2
3
VP1
Power Supply for the RF Charge Pump. This should be greater than or equal to VDD1. In systems where
V
DD1 is 3 V, it can be set to 6 V and used to drive a VCO with a tuning range up to 6 V.
CPRF
Output from the RF Charge Pump. This is normally connected to a loop filter which drives the input
to an external VCO.
4
5
6
7
8
DGNDRF
RFIN
AGNDRF
FLO
Ground Pin for the RF Digital Circuitry.
Input to the RF Prescaler. This low level input signal is ac-coupled from the RF VCO.
Ground Pin for the RF Analog Circuitry.
RF/IF Fastlock Mode.
REFIN
Reference Input. This is a CMOS input with a nominal threshold of VDD/2 and an equivalent input
resistance of 100 kΩ. This input can be driven from a TTL or CMOS crystal oscillator.
9
DGNDIF
Digital Ground for the IF Digital, Interface and Control Circuitry.
10
MUXOUT
This multiplexer output allows either the IF/RF Lock Detect, the scaled RF, scaled IF or the scaled
Reference Frequency to be accessed externally.
11
CLK
Serial Clock Input. This serial clock is used to clock in the serial data to the registers. The data is
latched into the 24-bit shift register on the CLK rising edge. This input is a high impedance
CMOS input.
12
13
14
DATA
LE
Serial Data Input. The serial data is loaded MSB first with the two LSBs being the control bits. This
input is a high impedance CMOS input.
Load Enable, CMOS Input. When LE goes high, the data stored in the shift registers is loaded into
one of the four latches, the latch being selected using the control bits.
RSET
Connecting a resistor between this pin and ground sets the maximum RF and IF charge pump output
current. The nominal voltage potential at the RSET pin is 0.66 V. The relationship between ICP and RSET is
13.5
ICP MAX
=
RSET
So, with RSET = 2.7 kΩ, ICP MAX = 5 mA for both the RF and IF Charge Pumps.
15
16
17
18
AGNDIF
IFIN
DGNDIF
CPIF
Ground Pin for the IF Analog Circuitry.
Input to the RF Prescaler. This low-level input signal is ac-coupled from the IF VCO.
Ground Pin for the IF Digital, Interface, and Control Circuitry.
Output from the IF Charge Pump. This is normally connected to a loop filter which drives the input
to an external VCO.
19
20
VP2
Power Supply for the IF Charge Pump. This should be greater than or equal to VDD2. In systems where
VDD2 is 3 V, it can be set to 6 V and used to drive a VCO with a tuning range up to 6 V.
Power Supply for the IF, Digital and Interface Section. Decoupling capacitors to the ground plane should
VDD
2
be placed as close as possible to this pin. VDD2 should have a value of between 2.7 V and 5.5 V. VDD
2
must have the same potential as VDD1.
PIN CONFIGURATIONS
CP-20
TSSOP
20
19
18
17
16
15
14
13
12
11
V
2
V
1
1
2
DD
DD
20 19 18 17 16
V 1
V 2
P
P
ADF4210/
ADF4211/
ADF4212/
ADF4213
CP
CP
3
RF
RF
CP
IF
1
2
3
4
5
15
14
13
12
11
RF
DGND
ADF4210/
ADF4211/
ADF4212/
ADF4213
TOP VIEW
(Not to Scale)
IF
DGND
DGND
DGND
4
IF
IN
RF
IF
RF
IN
AGND
RF
IF
5
IF
IN
IN
AGND
RF
R
SET
TOP VIEW
(Not to Scale)
AGND
AGND
6
RF
IF
FL
O
LE
R
7
FL
SET
O
LE
REF
8
6
7
8
9
10
IN
DGND
IF
DATA
CLK
9
10
MUXOUT
–5–
REV. A