AD8363
Preliminary Technical Data
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
12
11
10
9
VTGT VREF VPOS COMM
13 NCON
TEMP
VSET
VOUT
CLPF
8
14 INHI
7
6
5
AD8363
15 INLO
16 TCM1
TCM2 CHPF VPOS COMM
1
2
3
4
Figure 2. Pin Configuration
Table 3. Pin Function Descriptions
Pin
No.
Mnemonic
Description
1
2
TCM2/PWDN
A dual function pin used for controlling the amount of nonlinear intercept temperature
compensation and/or shutting down the device. This pin can be connected to the
VREF pin through a voltage divider if the shut down function is not used
CHPF
Connect to VPOS via a capacitor to determine -3 dB point of the input signal high-pass
filter.
3, 10
4, 9
5
VPOS
COMM
CLPF
Supply for the device. Connect to +5 V power supply.
System Common Connection. Connect via low impedance to system common.
Connection for Loop Filter Integration (Averaging) Capacitor. Connect a ground-
referenced capacitor to this pin. A resistor may be connected in series with this
capacitor to improve loop stability and response time.
6
7
VOUT
VSET
Output pin in Measurement Mode (error Amplifier output). In measurement mode,
normally connected directly 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.
The controls the VGA gain such that a 50mV change in VSET reduces the gain by
approximately 1dB.
8
TEMP
VREF
VTGT
Temperature Sensor Output.
11
12
General-Purpose Reference Voltage Output of 1.16 V.
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.
13
14
NCON
INHI
Not connected.
Single-ended RF input pin. RF input signal is normally AC coupled to this pin through a
coupling capacitor.
15
16
INLO
Grounded for single ended input
TCM1
Connect to VREF through a voltage divider or an external DC source. Is used to adjust
Intercept temperature compensation (3K impedance)
Paddle
Connect via low impedance to system common
Rev. PrB| Page 6 of 14
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