Preliminary Technical Data

ADRF6518

Rev. PrA | Page 7 of 36

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

Figure 4. Pin Configuration

Table 3. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

VPSD

Digital Positive Supply Voltage: 3.15 V to 3.45 V.

2

COMD

Digital Common. Connect to external circuit common using the lowest possible impedance.

3

LE

4

CLK

5

DATA

6

SDO/RST

Peak Detector Reset (RST). A >25 ns high pulse is required on this pin to reset the detector.

7

VICM/AC

Input Common-Mode Reference (VICM). VPI/2 reference output for optimal common-mode level

to drive the differential inputs.

AC Coupling/Internal Bias Activation (AC). Pull this pin low for ac coupling of the inputs.

8

VPI

Input Stage Supply Voltage: 3.15 V to 5.25 V. Connect to VPS if input common-mode range is

narrow (1.35 V to 1.95 V). Connect to 5 V if input common-mode up to 3.1 V is desired.

12, 16, 25, 29

VPS

Analog Positive Supply Voltage: 3.15 V to 3.45 V.

9, 19, 22

COM

Analog Common. Connect to external circuit common using the lowest possible impedance.

10, 11, 30, 31

INP2, INM2,

INM1, INP1

Differential Inputs. 400 Ω input impedance.

13

VPK

Peak Detector Output. Scaling of 1 V/V pk differential at filter inputs. The bigger peak of two

channels is reported.

14

VGN2

VGA2 Analog Gain Control. 0 V to 1 V, 30 mV/dB gain scaling.

15, 26

OFS2, OFS1

Offset Correction Loop Compensation Capacitors. Connect capacitors to circuit common.

17, 18, 23, 24

OPP2, OPM2,

OPM1, OPP1

Differential Outputs. <10 Ω output impedance. Common-mode range is 0.9 V to VPS − 1.2 V;

default is VPS/2.

20

VOCM

Output Common-Mode Setpoint. Defaults to VPS/2 if left open.

21

VGN3

VGA3 Analog Gain Control. 0 V to 1 V, 30 mV/dB gain scaling.

27

VGN1

VGA1 Analog Gain Control. 0 V to 1 V, 30 mV/dB gain scaling.

28

RAVG

Peak Detector Time-Constant Resistor. Connect this pin to VPS. Leave open for longest hold time.

RAVG range is ∞ to 1 kΩ.

32

ENBL

Chip Enable. Pull high to enable.

EP

Exposed Pad. Connect the exposed pad to a low impedance ground pad.