2

4994BS–AUDR–05/08

ATR4262M1 [Preliminary]

2.

Pin Configuration

Figure 2-1.

Pinning QFN48

AMIN1

AMIN2

AMCVC

AMPIND

SW1

FMPIND

FMIN1

FMIN12

FMIN2

DAC1

DAC2

SW2

SW3

IFOUT1

IFOUT2

VSPLL

REF1

REF2

VRPLL

AMLF

FMLF

VTUNE

GNDPLL

VCOBUF

48 47 46 45 44 43 42 41 40 39 38 37

13 14 15 16 17 18 19 20 21 22 23 24

1

2

3

4

5

6

7

8

9

10

11

12

36

35

34

33

32

31

30

29

28

27

26

25

ATR4262M1

Table 2-1.

Pin Description

Pin

Symbol

Function

1

AMIN1

AM mixer input

2

AMIN2

AM mixer input

3

AMCVC

AM cascode voltage output

4

AMPIND

AM pin diode output

5

SW1

SW1 switching output

6

FMPIND

FM pin diode output

7

FMIN1

FM mixer input 1

8

FMIN12

FM mixer input 12

9

FMIN2

FM mixer input 2

10

DAC1

DAC tuning voltage output 1

11

DAC2

DAC tuning voltage output 2

12

SW2

SW2 switching output/external tuning voltage input

13

FMAGCTC

RF AGC FM time constant

14

KAGC

Keyed AGC input/SW7/lock detect/AFSAMPLE

15

IFGCL

IF gain control LSB/SW4

16

IFGCM

IF gain control MSB/SW5

17

ENABLE

Control bus ENABLE/address select

18

SDA

Two-wire control bus SDA

19

SCL

Two-wire control bus SCL