AD8363

Preliminary Technical Data

Rev. PrB| Page 6 of 14

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

12

VTGT

11

VREF

10

VPOS

9

COMM

1

TCM2

2

CHPF

3

VPOS

4

COMM

13

NCON

8

TEMP

14

INHI

7

VSET

15

INLO

6

VOUT

16

TCM1

5

CLPF

AD8363

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin

No.

Mnemonic

Description

1

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

2

CHPF

Connect to VPOS via a capacitor to determine -3 dB point of the input signal high-pass

filter.

3, 10

VPOS

Supply for the device. Connect to +5 V power supply.

4, 9

COMM

System Common Connection. Connect via low impedance to system common.

5

CLPF

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

VOUT

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.

7

VSET

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

Temperature Sensor Output.

11

VREF

General-Purpose Reference Voltage Output of 1.16 V.

12

VTGT

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

NCON

Not connected.

14

INHI

Single-ended RF input pin. RF input signal is normally AC coupled to this pin through a

coupling capacitor.

15

INLO

Grounded for single ended input

16

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