Philips Semiconductors

Objective data

SA58641

High performance mixer FM IF system

with high-speed RSSI

2004 Dec 16

11

10

9

8

7

6

5

4

3

2

1

20

19

18

17

16

15

14

13

12

11

RSSI

MIXER

QUAD

C19

C18

SW5

C13

C15

FLT1

0.1

µF

6.8

µF 10V

160pF select

1000pF

39pF select

0.1

µF

1

µF

C14

C15

C18

C19

C20

C21

L1

L2

L3

L4

L5

FLT1

0.1

µF

1000pF

10.7MHz (Murata SFE10.7MA5-A)

1.27–2.25

µH select for mixer

5.6

µH select for input match

22nH select for input match

1000pF

C1

C2

C3

C4

C5

C6

*C7

C8

C9

C10

C11

C12

C13

Automatic Test Circuit Component List

OSCILLATOR

FLT2

10.7MHz (Murata SFE10.7MA5-A)

FLT3

Active de-emphasis

FLT4

“C” message weighted

LIMITER

VCC

+

–

DATA

C16

0.1

µF

C17

0.1

µF

*NOTE: This value can be reduced when a battery is the power source.

PWR

DWN

0.1

µF

100pF

1–5pF select for input match

0.1

µF

0.1

µF

1–5pF select for input match

47nH select for input match

0.1

µF

1000pF

150nH select for input match

1pF

FLT

3

FLT

4

FLT2

R1

R2

R3

R4

R5

R6

R7

R8

R9

R10

R11

347.8

Ω

6.42k

Ω

49.9

Ω

1k

Ω

347.8

Ω

49.9

Ω

49.9

Ω

1k

Ω

49.9

Ω

8.2k

Ω select

6.42k

Ω

MIXER

IF/LIM OUT

IF/LIM IN

L5

C12

C11

21

+

–

IF

AMP

2

1

C14

R3

R2

R4

R5

C16

R6

21

2

1

C17

R8

R7

R9

C20

R10

R11

C21

L4

R1

C8

C9

C10

C6

C7

C4

C5

L3

C3

C1

*L1

*L2

RF IN

LO IN

RSSI

OUT

PWR

DWN

CTRL

DATA

OUT

VCC

output match

C2

SR00501

Figure 9.

SA58641 240.05MHz (RF) / 10.7MHz (IF) Test Circuit