TDA5745 datasheet(13/20 Pages) PHILIPS

13 / 20 page

1998 Mar 09

Philips Semiconductors

Preliminary speciﬁcation

Low power mixers/oscillators for

hyperband tuners

TDA5744; TDA5745

Fig.11 Measurement circuit.

The pin numbers in parenthesis represent the TDA5745.

handbook, full pagewidth

MGM467

1 (24)

2 (23)

3 (22)

4 (21)

UHFIN1

UHFIN2

VHFIN

RFGND

5 (20)

15 pF

6 (19)

7 (18)

8 (17)

IFFIL1

IFFIL2

n.c.

9 (16)

10 (15)

11 (14)

12 (13)

n.c.

(12) 13

(11) 14

IFOUT1

(10) 15

(9) 16

(8) 17

(7) 18

(6) 19

VCC

GND

IFOUT2

UHFOSCIB1

UHFOSCOC1

UHFOSCOC2

(5) 20

(4) 21

(3) 22

(2) 23

(1) 24

UHFOSCIB2

VHFOSCIB1

VHFOSCOC2

VHFOSCOC1

TDA5744

(TDA5745)

1 nF

UHF1

UHF2

VHF

C13

C11

1.2 k

Ω

330

Ω

µF

(16 V)

µF

(16 V)

VHFH

LED-3Y

330

Ω

VHFL

LED-3R

330

Ω

UHF

R10

R11

LED-3G

R18

Ω

R22

C27

C28

for test purpose only

VCC

+VCC

VCC

TR1

BC847B

Vripple

VHFOSCIB2

C17

1 pF

2.2 pF

C16

2.2 pF

C14

R21

2.2 pF

C12

BB149

150 pF

100

BA792

BB152

4.7 k

Ω

30 nH

80 nH

16 nH

C18

10 pF

4.7 nF

C10

47 pF

C15

22 k

Ω

30 nH

µH

R4 1.5 k

Ω

R5 2.7 k

Ω

R3 22 k

Ω

22 k

Ω

R1 1.5 k

Ω

22 k

Ω

BB149

VHFH

VHFL

+33 V

AGND

tuning

voltage

+5 V

1234

C22

10 nF

C24

10 nF

80 nH

C20

1 nF

C19

1 nF

C21

18 pF

OUT

for test purpose only

TOKO 7 km

L value/C value

R16

22 k

Ω

R14

22 k

Ω

+VCC

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