Philips TEA6850 Datasheet
INTEGRATED CIRCUITS
DATA SH EET
TEA6850
IF filter / amplifier / demodulator for
FM radio receivers
Preliminary specification
File under Integrated Circuits, IC01
July 1994
Philips Semiconductors Preliminary specification
IF filter / amplifier / demodulator for FM
TEA6850
radio receivers
FEATURES
• Improved dynamic selectivity and sensitivity because of
tunable IF filter
• Fully integrated, frequency matched FM demodulator
• High linearity
• Unweighted level detector output
• Soft mute
• MPX output for RDS and diversity
• Internal source selector.
QUICK REFERENCE DATA
SYMBOL PARAMETER MIN. TYP. MAX. UNIT
V
P
I
P
supply voltage (pin 7) 7 8.5 10 V
supply current (pin 7) 14 17.5 21 mA
DS200 dynamic selectivity for 200 kHz 22 27 − dB
distance (EMF = 700 µV;
filter bandwidth = 50 kHz)
S/N signal-to-noise ratio 61 67 − dB
(∆f = ±22.5 kHz; f
= 1 kHz)
m
THD total harmonic distortion − 0.3 0.5 %
(∆f = ±75 kHz; f
V
O
AF output signal at pin 4 180 200 220 mV
= 1 kHz)
m
(RMS value)
T
amb
operating ambient temperature −40 −+85 °C
GENERAL DESCRIPTION
The TEA6850 is a monolithic bipolar integrated circuit for
IF filtering, FM demodulation and level detection. Using IF
filters tuned by the demodulated signal, dynamic
selectivity and sensitivity are improved.
ORDERING INFORMATION
EXTENDED TYPE
NUMBER
PINS PIN POSITION MATERIAL CODE
PACKAGE
TEA6850H 44 QFP plastic SOT307
Note
1. SOT307-2; 1996 August 26.
July 1994 2
(1)
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July 1994 3
Philips Semiconductors Preliminary specification
IF filter / amplifier / demodulator for FM
radio receivers
Fig.1 Diagram for adaptive application.
TEA6850
Philips Semiconductors Preliminary specification
IF filter / amplifier / demodulator for FM
radio receivers
TEA6850
Fig.2 TEA6850H (adaptive version), printed- circuit board.
July 1994 4
Philips Semiconductors Preliminary specification
IF filter / amplifier / demodulator for FM
radio receivers
PINNING
SYMBOL PIN DESCRIPTION
RDS
OUT
CENABLE 2 chip enable
MPX
IN
MPX 4 audio frequency output (MPX signal)
LVLUNW 5 unweighted level output
MPXSEL 6 source selector for MPX signal
V
P
GND 8 ground (0 V)
V
GAP
V
UT2
V
UT1
IFADJ 12 input for IF filter frequency adjustment
BWADJ 13 input for IF filter bandwidth adjustment
IF
IN
IF
INI
GAINADJ 16 input for mixer gain adjustment
n.c. 17 not connected
CRYSTAL 18 crystal oscillator input
GND 19 oscillator ground
n.c. 20 not connected
OUT300I 21 IF filter output (0°)
OUT300Q 22 IF filter output (90°)
CLIM1I 23 IF limiter feedback 1
CLIM2I 24 IF limiter feedback 2
CLIM3I 25 IF limiter feedback 3
CLIM4I 26 IF limiter feedback 4
CLIM1Q 27 IF limiter feedback 5
CLIM2Q 28 IF limiter feedback 6
CLIM3Q 29 IF limiter feedback 7
CLIM4Q 30 IF limiter feedback 8
LVLADJ 31 input for level adjustment
LVLWEI 32 weighted level output
IHP60 33 input for high-pass −3 dB adjustment
CHPMUTE 34 output of rectified high-pass signal
CMUTE 35 mute input
DEMOLOOP1 36 demodulator output 1
DEMOLOOP2 37 demodulator output 2
COP2 38 MPX correction output 2
CON2 39 MPX correction input 2
COO1 40 MPX correction output 1
1 output for RDS
3 external audio frequency input (MPX signal)
7 supply voltage (8.5 V)
9 internal reference voltage
10 reference voltage output
11 reference voltage output
14 IF signal input 1
15 IF signal input 2
TEA6850
July 1994 5
Philips Semiconductors Preliminary specification
IF filter / amplifier / demodulator for FM
radio receivers
SYMBOL PIN DESCRIPTION
CON1 41 MPX correction input 1
IFLOOP1 42 IF loop filter output 1
IFLOOP2 43 IF loop filter output 2
IFLOOP3 44 IF loop filter output 3
TEA6850
Fig.3 Pin configuration.
July 1994 6
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