TEMIC TBA120T Datasheet

TELEFUNKEN Semiconductors

FM IF amplifier and demodulator

Technology: Bipolar Features

 Input and demodulator provided for operating with

ceramic-resonators

 No selection of volume-input characteristics
 Independent sound output for VTR and headphone

Case: 14 pin dual inline plastic

 Additional sound input
 High ripple rejection
 High residual carrier suppression prevents harmonic

TBA120T

distortions

Pin Configuration

Pin Symbol Function

1 GND Ground

2, 13 Feedback

3 V
4 V
5 V

Rev . A1: 20.12.1994

i(AF)
ref
5

AF input – SCART
Reference voltage
Volume control

Figure 1 Block diagram

Pin Symbol Function

6,7,9,10 FM demodulator filter

8 V
11 V
12 V
14 V

o(AF)1

S
o(AF)2
i(IF)

AF output – controlled
Supply voltage
AF output – uncontrolled
IF input

1

TBA120T

TELEFUNKEN Semiconductors

Absolute Maximum Ratings

Reference point pin 1, unless otherwise specified

Parameters Symbol Value Unit
Supply voltage Pin 11 V
Volume setting voltage Pin 5 V
Reference supply current Pin 4 I
Power dissipation T

= 60°C P

amb

Ambient temperature range T
Storage temperature range T

S
5

Ref

tot

amb

stg

18 V

6 V
5 mA

400 mW

–15 to +70 °C

–25 to +125 °C

Electrical Characteristics

T

= +25°C, VS = 12 V, f = 5.5 MHz, Figure 3, reference point pin 1, unless otherwise specified

amb

Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit
Supply voltage range Pin 11 V
Supply current Pin 11 I
Reference voltage Pin 4 V
Output resistance Pin 4 r

S

S
oRef
Ref

Frequency range f 0 to 12 MHz
IF voltage gain Pin 6/14 G
Limited IF output voltage Pin 6 – 10 V

IF

o(IF)pp

Input limiting voltage f = 50 kHz,

f

= 1 kHz Pin 14 V

mod

Input impedance Pin 14 R

AM rejection m = 30 %, f = 50 kHz,

V

= 500 V, f

i

mod

= 1 kHz

DC voltage at AF output Vi = 0 Pin 8

Pin 12

Ripple rejection Pin 11/8

Pin 11/12

k

V

o(AF)1

V

o(AF)2

k
k

i(IF)

C

AM

Br
Br

i
i

IF residual voltage without de-emphasis

AF output voltage V

capacitor Pin 8

Pin 12

= 10 mV,

i

V

o(IF)1

V

o(IF)2

f =50 kHz,
f

= 1 kHz, R

mod

Output resistance Pin 8, 12 r
AF voltage amplification R
AF damping R

= 20 k, Pin 8/3 G

5

= 13 k, Fig. 3 Pin 8 –G

5

Volume setting range Pin 8 V
Input resistance Pin 3 r

= 20 k

5

Pin 8
Pin 12

V

o(AF)1

V

o(AF)2

o

v1

v1

o(AF)1

i

Mute function

Switching current

Pin 2 or 13

Switching voltage Figure 2 V

I

sw

mute

10 18 V

9.5 17.5 mA

4.2 4.8 5.5 V
12 

68 dB

250 mV

30 60 V

800

5



pF

50 60 dB

4

5.6
35

V
V

dB

30

20

mV

30

650
400

900
650

mV
mV

1.1 k

7.5 dB

24 30 34 dB
70 85 dB

2 k

400 A

3 V

2

Rev . A1: 20.12.1994