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mhc151

(30)

1

(1)

3

(5)

7

(31)

2

(2)

4

(3)

5

(4)

6

22

(24)

23

(26)

18

(20)

21

(23)

20

(22)

19

(21)

(7)

8

(8)

9

(9)

10

17

(18)

16

(17)

15

(16)

14

(15)

13

(14)

external

reference

AFC

output

VIF-PLL

VP

4 MHz

24

(27)

470 nF

390

pF

10 nF

VIF1

VIF2

SIF2

SIF1

OP1

FMPLL

VAGC

AFC

VPLL

VP

AGND

DEEM

AFD

DGND

AUD

(10)

11

SCL

(11)

12

SIOMAD

TOP

SDA

100

nF

100

pF

1.5

nF

tuner AGC

output

radio test

input

CVBS

output

TAGC

FMIN

CVBS

OP2

REF

5.6 k

Ω

10 nF

FM-PLL

filter

22

k

Ω

22 k

Ω

150 k

Ω

150 k

Ω

R2

(1)

R3

150

Ω

220 nF

Cx

470 nF

R1

2.2

k

Ω

(1)

MAD

select

audio

output

intercarrier

output

TDA9887

51

Ω

1

VIF

input

51

Ω

1

51

Ω

SIF

input

22 k

Ω

Fig.25 Test circuit.

Pin numbers for TDA9887HN in parenthesis.

(2) Different VIF loop filter in comparison with the application circuit due to different input characteristics (SAW filter or transformer).

Option

R1 not used

R1 = 2.2 k

Ω

R2 and R3 not used

1000 011 (R/W)

1000 010 (R/W)

R2 = R3 = 150 k

Ω

1001 011 (R/W)

1001 010 (R/W)