7-109

HPMX-5002 Pin Description

No.

Mnemonic

I/O Type

Description

1

IFOP1

Analog O/P

Output of IF amplifier, feeds quadrature network for discriminator

2

DMOD

Analog I/P

Input to discriminator mixer, driven by output of quadrature network

3

DMODOP

Analog O/P

Output of discriminator mixer, drives external low-pass data filter

4

BUF1

Analog I/P

Noninverting input of buffer amplifier that drives the data slicer

5

BUF2

Analog O/P

Output of buffer amplifer that drives the data slicer

6

TCNT

Analog DC

External capacitor connection which sets time constant for data slicer

7

TCSET

CMOS I/P

Data slicer time constant select

8

DATOP

CMOS O/P

Output bit stream from data slicer

9

RSSI

Analog O/P

Receive Signal Strength Indicator output

10

LKFIL

Analog DC

External capacitor connection which sets time constant for lock detector

11

LKDET

CMOS O/P

Indicates that LO2 PLL is in lock status

12

REF

Analog I/P

Reference signal for LO2 PLL

13

VCC3

DC Supply

PLL supply voltage

14

VEE3

Ground

PLL ground

15

DIV1

CMOS I/P

Controls divide ratio for reference frequency input to the LO2 PLL

16

DIV2

CMOS I/P

Controls divide ratio for reference frequency input to the LO2 PLL

17

DIV3

CMOS I/P

Controls divide ratio for VCO frequency input to the LO2 PLL

20

PFD

Analog O/P

LO2 PLL phase/frequency detector charge pump output

21

VEE4

Ground

LO2 VCO ground

22

VCC4

DC Supply

LO2 VCO supply voltage

23

AGC

Analog DC

External capacitor connection to compensate LO2 VCO AGC loop

24

VCOA

Analog I/P

VCO tank force line

25

VCOB

Analog O/P

VCO tank sense line

26

VCOADJ

Analog I/P

Controls amplitude of buffered LO2 VCO output

27

OSCOP

Analog O/P

Buffered LO2 output (+)

28

OSCOPB

Analog O/P

Buffered LO2 output (-)

29

VCC5

DC Supply

1st IF supply voltage

30

VEE5

Ground

1st IF ground

31

IPDC

Analog DC

External capacitor connection for decoupling 1st IF bias point

32

IP1

Analog I/P

1st IF input signal

33

VCC1

DC Supply

IF limiting amplifier supply voltage

34

VEE1

Ground

IF limiting amplifier ground

35

IF1

Analog O/P

Downconverted signal from front-end mixer, drives external filter

(hi-Z output, open collector)

37

IFIP1

Analog I/P

Input to IF limiting amplifier, driven by external filter

(600

Ω impedance, internally set)

38

DC1A

Analog DC

External capacitor connection for decoupling IF limiting amplifier

39

VCC2

DC Supply

IF limiting amplifier supply voltage

40

VEE2

Ground

IF limiting amplifier ground