LMX3160 Pin Diagram (Continued)
Pin No.
17
Pin Name
I/O
Ð
Description
V
P
Power supply for charge pump.
18
D
o
O
Internal charge pump output. For connection to a loop filter for driving the input of an external
VCO.
19
20
21
22
V
Ð
Power supply input for CMOS section of PLL. Connect to VBAT
Ground.
CC
GND
Out 0/FL
I/O Programmable CMOS output. Can be used for FastLockTM output (See Programmable Modes).
o
Out 1/Rx PD I/O Programmable CMOS output. Can be used for hardwire receiver power down (See Programmable
Modes).
23
Out 2/Tx PD I/O Programmable CMOS output. Can be used for hardwire transmitter power down (See
Programmable Modes).
e
e
HIGH for PLL power saving.
24
25
26
27
28
29
PLL PD
Clock
Data
LE
I
I
I
I
I
I
PLL PD
LOW for PLL normal operations. PLL PD
High impedance CMOS clock input.
Binary serial data input. Data entered MSB first. High impedance CMOS input.
Load enable input.
Oscillator input.
OSC
IN
S Field
DC compensation circuit enable. While LOW, the DC compensation circuit is enabled, and the
threshold is updated through the DC compensation loop. While HIGH, the switch is opened, and
the comparator is held by the external capacitor.
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
RSSI
OUT
O
O
I
Voltage output of the received signal strength indicator (RSSI).
Threshold level to external comparator.
Input to DC compensation circuit.
Demodulated output of discriminator.
Ground.
Thresh
DC COMP
IN
DISC
GND
O
Ð
Ð
I
OUT
V
CC
Power supply input to discriminator circuit. Connect to VBAT
Quadrature input.
QUAD
IN
V
Ð
Ð
O
Ð
Ð
I
Power supply input to limiter output stage. Connect to VBAT
Ground.
CC
GND
LIM
Limiter output to the quadrature tank.
Ground.
OUT
GND
V
CC
Power supply input for limiter. Connect to VBAT
IF input to the limiter.
LIM
IN
GND
GND
Ð
Ð
O
Ð
I
Ground.
Ground.
IF
IF output to bandpass filter.
OUT
CC
V
Power supply input for IF amplifier. Connect to VBAT
IF input to IF amplifier.
IF
IN
Rx V
Ð
Supply voltage to external LNA.
REG
3