AD8363
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
16 TCM1
15 INLO
14 INHI
13 NC
TCM2/PWDN 1
CHPF 2
VPOS 3
COMM 4
PIN 1
INDICATOR
12 VTGT
11 VREF
10 VPOS
9 COMM
AD8363
TOP VIEW
(Not to Scale)
VOUT 6
TEMP 8
VSET 7
CLPF 5
NOTES
1. NC = NO CONNECT
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
1
Mnemonic
TCM2/PWDN
Description
This is a dual function pin used for controlling the amount of nonlinear intercept temperature
compensation at voltages <2.5 V and/or for shutting down the device at voltages >4 V. If the
shutdown function is not used, this pin can be connected to the VREF pin through a voltage divider.
Connect this pin to VPOS via a capacitor to determine the −3 dB point of the input signal high-pass filter.
Only add a capacitor when operating at frequencies below 10 MHz.
Supply for the Device. Connect these pins to a 5 V power supply. Pin 3 and Pin 10 are not
internally connected; therefore, both must connect to the source.
System Common Connection. Connect these pins via low impedance to system common. The
exposed paddle is also COMM and should have both a good thermal and good electrical
connection to ground.
Connection for Loop Filter Integration (Averaging) Capacitor. Connect a ground-referenced
capacitor to this pin. A resistor can be connected in series with this capacitor to improve loop
stability and response time. Minimum C
LPF
value is 390 pF.
Output Pin in Measurement Mode (Error Amplifier Output). In measurement mode, this pin
is connected to VSET. This pin can be used to drive a gain control when the device is used in
controller mode.
The voltage applied to this pin sets the decibel value of the required RF input voltage that results
in zero current flow in the loop integrating capacitor pin, CLPF. This pin controls the variable gain
amplifier (VGA) gain such that a 50 mV change in VSET reduces the gain by approximately 1 dB.
Temperature Sensor Output.
General-Purpose Reference Voltage Output of 2.3 V.
The voltage applied to this pin determines the target power at the input of the RF squaring circuit.
The intercept voltage is proportional to the voltage applied to this pin. The use of a lower target
voltage increases the crest factor capacity; however, this may affect the system loop response.
No Connect.
This is the RF input pin for frequencies up to and including 2.6 GHz. The RF input signal is
normally ac-coupled to this pin through a coupling capacitor.
This is the RF input pin for frequencies above 2.6 GHz. The RF input signal is normally ac-coupled
to this pin through a coupling capacitor.
This pin is used to adjust the intercept temperature compensation. Connect this pin to VREF
through a voltage divider or to an external dc source.
Equivalent
Circuit
See Figure 49
2
3, 10
4, 9,
EPAD
5
CHPF
VPOS
COMM
07368-002
See Figure 60
N/A
N/A
CLPF
See Figure 51
6
VOUT
See Figure 51
7
VSET
See Figure 50
8
11
12
TEMP
VREF
VTGT
See Figure 45
See Figure 46
See Figure 52
13
14
15
16
NC
INHI
INLO
TCM1
N/A
See Figure 44
See Figure 44
See Figure 48
Rev. 0 | Page 8 of 36
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