FM-Tuner
TUA 4310X
TUA 4310XS
Preliminary Data
Features
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Bipolar IC
Double-balanced mixer
High RF-input impedance
Sym. and unsym. operation
AGC-generation for PIN-Diodes and MOSFET’s
Strictly symmetrical RF-parts
P-DSO-20-1
Decoupled counter output
High supply voltage ripple rejection
2-pin oscillator
First IF-amplifier adjustable gain
Second IF-amplifier adjustable temperature coefficient
P-SSOP-20-1
Type
TUA 4310X
TUA 4310XS
Circuit Description
Ordering Code
Q67006-A5054
Q67006-A5203
Package
P-DSO-20-1 Tape and Reel
P-SSOP-20-1 Tape and Reel
The TUA 4310X has been designed as integrated tuner with strictly symmetrical
RF-parts for use in car radios. In addition the IC provides a prestage control and an IF
post amplification.
The IC is especially suitable for use in car radios with prestage control and distributed
IF-selection.
The integrated circuit includes an 2-pin oscillator with symmetrical input, buffered output
and a double balanced mixer for frequency conversion. The RF-input stage allows
symmetrical and unsymmetrical operation. The resulting IF is amplified in a first linear
IF-driver with adjustable gain and in a second IF-driver with an adjustable temperature
coefficient. Between these drivers an additional IF-selection is recommended. The
AGC-stage integrated for prestage control can drive PIN-Diodes as well as MOSFET’s.
The IC also includes a reference voltage source with high supply voltage ripple rejection.
Semiconductor Group
1
11.94
TUA 4310X
TUA 4310XS
Pin Function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Function
RF-input for mixer
RF-input for mixer
AGC-threshold
Ground
Reference voltage
Oscillator
Oscillator
Decoupled oscillator output (counter)
IF-driver temperature coefficient adjust
IF-driver 2 output
IF-driver 2 input
IF-driver 1 gain adjust
IF-driver 1 output
IF-driver 1 decouple
IF-driver 1 input
Supply voltage
AGC-time constant
AGC-output for the prestage control
Mixer output
Mixer output
Semiconductor Group
2
TUA 4310X
TUA 4310XS
Absolute Maximum Ratings
(cont’d)
T
A
= – 40 to 85
°C
Parameter
Symbol
Limit Values
min.
Mixer
Interceptpoint
third order
Noise figure
Mixer gain
Input impedance
2)
Input impedance
3)
Input impedance
4)
Input impedance
5)
Input impedance
6)
max.
Unit
Test Condition
I
P3
NF
G
R
R
sym
C
sym
R
asym
C
asym
110
10
dB/µV
dB
dB
kΩ
kΩ
pF
kΩ
pF
Ω
V
1, 2
≥
100 mVrms
G
mix
= 20 Ig (
V
15
/
V
1,2
)
(incl. – 6 dB CER1)
1)
Optimum generator for
X
N
noise matching
7)
Oscillator
Interference
modulation
Output signal
Output impedance
(resistive)
Operating frequency
1)
2)
3)
4)
5)
6)
7)
∆
f
5
115
270
390
160
Hz
mVrms
R
L
= 300
Ω
Ω
MHz
V
8
R
8
f
OSC
CER-filters SFE 10.7 + additional correction to – 6 dB.
Internal resistance between input pin and internal
V
REF
.
Real part of sym. input impedance.
Imaginary part of sym. input impedance.
Real part of asym. input impedance.
Imaginary part of asym. input impedance.
Optimum generator impedance for noise minimum.
Semiconductor Group
5
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