AD8317

Data Sheet

Rev. D | Page 6 of 19

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

1

INHI

2

COMM

3

CLPF

4

VSET

8INLO

7 VPOS

6 TADJ

5VOUT

AD8317

TOP VIEW

(Not to Scale)

NOTES

1. EXPOSED PAD MUST BE

CONNECTED TO GROUND VIA

A LOW IMPEDANCE PATH.

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

INHI

RF Input. Nominal input range of −50 dBm to 0 dBm, referenced to 50 Ω; ac-coupled RF input.

2

COMM

Device Common. Connect to a low impedance ground plane.

3

CLPF

Loop Filter Capacitor. In measurement mode, this capacitor sets the pulse response time and video bandwidth.

In controller mode, the capacitance on this node sets the response time of the error amplifier/integrator.

4

VSET

Setpoint Control Input for Controller Mode or Feedback Input for Measurement Mode.

5

VOUT

Measurement and Controller Output. In measurement mode, VOUT provides a decreasing linear-in-dB

representation of the RF input signal amplitude. In controller mode, VOUT is used to control the gain of a VGA or

VVA with a positive gain sense (increasing voltage increases gain).

6

TADJ

Temperature Compensation Adjustment. Frequency-dependent temperature compensation is set by connecting

a ground-referenced resistor to this pin.

7

VPOS

Positive Supply Voltage: 3.0 V to 5.5 V.

8

INLO

RF Common for INHI. AC-coupled RF common.

EPAD

Exposed Pad. Exposed pad must be connected to ground via a low impedance path.