AD6411

–4–

REV. 0

PIN FUNCTION DESCRIPTIONS

Pin No.

Label

Description

Type

Comments

1

REF

DECT Reference Clock Input

Input

2

SFS

S-Field Sample

Input

HIGH = Sample; LOW = Hold

3

DEMOD_DATA

Demodulator Output OR Sliced Demodulator

Output

Mode Controlled by DSD Bit in

Output

Control Register

4

TX_ENAB

Transmit Section Power Control Input

Input

Active-High or Active-Low Set by

TSB Bit in Setup Word

5

COFF

Demodulator Offset Capacitor

Output

Connect to External Capacitor

6

DMR

Input for IF PLL Loop Filter Voltage after Data Filter

Input

7

IFLF

Drive for IF PLL Active Loop Filter

Output

8

IFCP

Virtual Ground for IF PLL Active Loop Filter

Input

9

IFVCO

External Resonator for Demodulator VCO

Input

10

VREF

Voltage Reference Output

Output

1.3 V; Can Be Used for A/D Converter

Reference in Soft-Decision Applications

11, 15, 18,

25, 27, 29,

31, 33, 34,

36, 39

GND

Ground

Power

12

VCCDM

PLL Demodulator Supply

Power

Normally Connected to VS1

13

RSSI

Receive Signal Strength Indicator Output

Output

14

VCCIF2

IF Supply 2

Power

Normally Connected to VS1

16

IFINB

IF Input

Input

Balanced Input from IF SAW Filter

17

IFIN

IF Input

Input

Balanced Input from IF SAW Filter

19

VCCIF1

IF Supply 1

Power

Normally Connected to VS1

20

VS1

Regulator Sense

Input

Connect to Collector of VS1 Pass Device

21

VF1

Regulator Force

Output

Connect to Base of VS1 Pass Device

22

SYN_ENAB

Synthesizer Section Power Control Input

Input

Active-High or Active-Low Set by

SSB Bit in Setup Word

23

VBAT2

Connect to Battery

Power

24

MXOP

Receive Mixer Output

Output

26

VCCRX

Receive RF Supply

Power

Normally Connected to VS1

28

RFIN

Receive Mixer Input

Input

30

RX_ENAB

Receive Section Power Control Input

Input

Active-High or Active-Low Set by RSB

Bit in Setup Word

32

TXOP

Transmit Output

Output

Open Collector Output

35

VCCTX

Transmit Supply

Power

Normally Connected to VS1

37

VCCPD

Phase Detector and Charge Pump Supply

Power

Normally Connected to VS1

38

LF

Loop Filter (from Charge Pump Output)

Output

40

VCOB

UHF Oscillator

Input

VCO Tank Circuit

41

VCCVCO

Supply for Second Regulator Sense

Power

Connect to Collector of VS2 Pass Device

42

VCO

UHF Oscillator

Input

VCO Tank Circuit

43

BSW

Resonator Band Switch Output

Output

Controls Tank Circuit Band Segment

44

VF2

Regulator Force

Output

Connect to Base of VS2 Pass Device

45

VBAT1

Connect to Battery

Power

46

EN

3-Wire Bus Enable

Input

47

DATA

3-Wire Bus Data

Input

48

CLK

3-Wire Bus Clock

Input