Datasheet TDA4320X Datasheet (Siemens)

FM-IF with Counter Output, Field Strength Indicator,
Noise Detector and MUTE Setting

1 Overview

1.1 Features

• 7-stage limiter amplifier

• Coincidence demodulator

• Counter output with request input

• Field strength output

• Multipath identification circuit

• Adjustable muting depth (with full muting ≥ 80 dB)

• This device is ESD protected

P-DSO-16-1

TDA 4320X

Type Ordering Code Package

TDA 4320X Q67000-A-5000 P-DSO-16-1

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1.2 Pin Configuration

(top view)

TDA 4320X

P-DSO-16-1

Figure 1

1.3 Pin Definitions and Functions
Pin No. Symbol Function

1 GND Ground

Decoupling capacitors for bias, VS and V
connected directly to Pin 1

2 Multipath

identification input

Multipath identification input

High impedance input (
the filtered field strength output (high pass or band pass).

3 Rectifier time

constant

Rectifier time constant

Determines the attack and release time of the
identification circuit.

4 Multipath

identification
output

Multipath identification output

Open npn-collector output, which is low during
(V4/V1 ≤ 0.7 V) multipath interference.

Pins are to be

REF

R

~10kΩ). This input receives

i

5 MUTE input MUTE input

For DC voltage (usually derived from field strength output
voltage) which attenuates the AF output voltage by the
setting muting depth (Pin 7). Max. attenuation when

V

= 0 V, no attenuation when V5≥ 0.5 V.

5

6 AF output AF output

Demodulated FM-IF.

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1.3 Pin Definitions and Functions (cont’d)
Pin No. Symbol Function

7 MUTE depth MUTE depth

Adjustment by connecting a dc voltage to ground the
requested muting depth can be set. Maximal attenuation
of AF output voltage with
attenuation with

V

≤ 1V (≥80 dB).

7

V

7

TDA 4320X

V

= 2.4 V (typ. 38 dB), minimal

7

= 4.8 V (typ. 0 dB). Full muting with

8 Demodulator

tank circuit

Demodulator tank circuit

Driven via two on-chip capacitors (approx.15 pF ± 25 %).
The tank circuit voltage should be typ. 400 mVpp.

9 Demodulator

Demodulator circuit

circuit

10 Reference

voltage

Reference voltage

Should be RF decoupled to Pin 1.

11 IF counter output IF counter output

Provides the IF carrier frequency (low impedance output

R

≈ 1.5 kΩ).

out

12

V

S

Supply voltage

RF decoupled to Pin 1

13 Field strength

output

Field strength output

Supplies a DC voltage proportional to the IF input level
with very low delay time.

14 Field strength

adjust

Field strength adjust

Adjustment of slope and starting point of field strength
output voltage

15 IF input bias IF input bias

To be RF decoupled to Pin 1

16 IF input IF input

FM-lF input

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1.4 Functional Block Diagram

TDA 4320X

Figure 2

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TDA 4320X

2 Functional Description

The FM-IF demodulator TDA 4320X has been developed especially for car radio
applications. The on-chip multipath identification circuit activates an interference
suppression circuit in case of multipath interferences.

3 Circuit Description

The IC includes a 7-stage capacitive coupled limiter amplifier with coincidence
demodulator and AF output. The AF output signal can be continuously attenuated to
decrease the noise. In case of multipath interferences, the TDA 4320X includes an
identification circuitry. There is a field strength output (with min. 76 dB dynamic range,
typ. ± 1 dB nonlinearity and typ. ± 3 dB temperature drift), an IF counter output and an
adjustable muting (with full muting ≥ 80 dB).

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TDA 4320X

4 Electrical Characteristics

4.1 Absolute Maximum Ratings

T

=–40°Cto+85°C

A

Parameter Symbol Limit Values Unit Remarks

min. max.

Supply voltage
Junction temperature
Storage temperature
Thermal resistance (system-air)
ESD voltage, HBM (1.5 kΩ, 100 pF)

V
T
T
R
V

S

j

S

thSA

ESD

0 13.2 V

150 °C
125 °C
105 K/W

–4 4 kV

Note: Maximum ratings are absolute ratings; exceeding only one of these values may

cause irreversible damage to the integrated circuit.

4.2 Operating Range

T

=–40°Cto+85°C

A

Parameter Symbol Limit Values Unit Remarks

min. max.

Supply voltage
Ambient temperature

V
T

S

A

7.5 13.2 V
–40 85 °C

Note: In the operating range the functions given in the circuit description are fulfilled.

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TDA 4320X

4.3 AC/DC Characteristics

V

= 10 V; f

S

V

= 10 mV; TA = – 40 °C to + 85 °C

iIFrms

Parameter Symbol Limit Values Unit Test Condition Test

= 10.7 MHz; ∆f = 75 kHz; f

ilF

= 1 kHz;

mod

min. typ. max.

Circuit

Current consumption
Stabilized voltage
Field strength output

I

12

V

10

V

13

4.5 4.8 5.1 V V5= 4.8 V; V7=4V 1

30 mA V5= 4.8 V; V7=4V 1

V

= 4.8 V; V7=4V

5

– Dynamic range 80 dB D1
– Nonlinearity ± 1dB D2
– Temperature drift ± 3dB D3
– Load capacitance 50 pF
– Load resistance 1 kΩ

Input voltage for limiter

V

13

V

13

V

13

V

16

5.0 5.5 6.0 V V

2.2 2.7 3.2 V V
0 1.2 V V

30 µVrms V

= 200 mV 1

ilFrms

= 1 mV 1

ilFrms

= 0 mV 1

ilFrms

=–3dB 1

qAF

threshold
AF output voltage
Total harmonic distortion
AM suppression

V

qAF

THD
a

AM

qAF

480 840 mVrms V5= 4.8 V; V7=4V 1

1.2 % V5= 4.8 V; V7=4V 1

60 dB m =80% 1

Signal-to-noise ratio
Counter output voltage

Noise detector sensitivity

Charge current Pin 3

Discharge current Pin 3

76 dB

a

S/N

V

11

V

2

V

2

I

3

76 dB V5= 4.8 V; V7=4V 1
50 mVrms CL= 5 pF;

3.2 mVrms f2= 20 kHz 1

4.3 mVrms f2= 300 kHz 1

2.5 mA f2= 20 kHz;

2.5 mA

I

3

20 µA V

m =30% 1

1

R

= 1.5 kΩ

i11

1

V

≥ 6 mVrms

2

f

= 300 kHz;

2

V

≥7 mVrms

2

=0V 1

2AC

1

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TDA 4320X

4.3 AC/DC Characteristics (cont’d)

V

= 10 V; f

S

V

= 10 mV; TA = – 40 °C to + 85 °C

iIFrms

Parameter Symbol Limit Values Unit Test Condition Test

= 10.7 MHz; ∆f = 75 kHz; f

ilF

= 1 kHz;

mod

min. typ. max.

Circuit

AF MUTE

Voltage for MUTE OFF
Voltage for MUTE ON

V

= 10 V; f

S

V

= 10 mV; TA = 25 °C

iIFrms

= 10.7 MHz; ∆f = 75 kHz; f

ilF

a

AF

–2 2 dB
30 38 46 dB
80 dB
80 dB

V

5

V

5

0.7 V 1
0V 1

0dBV

= 1 kHz;

mod

= 4.8 V; V7= 4.8 V D4

5

V

=0V;V7= 4.8 V D4

5

V

=0V;V7= 2.4 V D4

5

V

= 4.8 V; V7≤ 1.0 V D4

5

V

=0V;V7≤1.0 V D4

5

Parameter Symbol Limit Values Unit Test Condition Test

Circuit

Current consumption
Stabilized voltage
Field strength output
Dynamic range

min. typ. max.

I

12

V

10

V

13

4.6 4.8 5.0 V V5= 4.8 V; V7=4V1

30 mA V5= 4.8 V; V7=4V1

V

= 4.8 V; V7=4V

5

74 80 dB D1

Nonlinearity
Temperature drift
Load capacitance
Load resistance

Input voltage for limiter

1kΩ

V

13

V

13

V

13

V

16

5.1 5.5 5.9 V V

2.3 2.7 3.1 V V
0 1.1 V V

± 1dB D2

± 3dB D3

50 pF

= 200 mV 1

ilFrms

= 1 mV 1

ilFrms

= 0 mV 1

ilFrms

30 39 µVrms V

=–3dB 1

qAF

threshold
AF output voltage

Total harmonic distortion
AM suppression

V

qAF

THD
a

AM

qAF

550 650 750 mVrms V5= 4.8 V; V7=4V1

1.2 % V5= 4.8 V; V7=4V1
60 dB m = 80 % 1
76 82 dB m = 30 % 1

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TDA 4320X

4.3 AC/DC Characteristics (cont’d)

V

= 10 V; f

S

V

= 10 mV; TA = 25 °C

iIFrms

Parameter Symbol Limit Values Unit Test Condition Test

= 10.7 MHz; ∆f = 75 kHz; f

ilF

= 1 kHz;

mod

min. typ. max.

Circuit

Signal-to-noise ratio

Counter output voltage

Noise detector sensitivity

Charge current Pin 3

Discharge current Pin 3
AF MUTE

a

S/N

V

11

V

2

V

2

I

3

I

3

a

AF

76 84 dB V5= 4.8 V;

V

=4V

7

50 80 mVrms CL= 5 pF;

R

= 1.5 kΩ

i11

2 3.2 6 mVrms f2= 20 kHz 1

2.7 4.3 7 mVrms f2= 300 kHz 1

1.6 2.5 4 mA f2= 20 kHz;

V

≥ 6 mVrms

2

1.6 2.5 4 mA

10 20 40 µA V

0dBV

–2 2 dB

32 38 44 dB

f

= 300 kHz;

2

V

≥ 7 mVrms

2

=0V 1

2AC

= 4.8 V;

5

V

= 4.8 V

7

V

=0V;

5

V

= 4.8 V

7

V

=0V;

5

V

= 2.4 V

7

1

1

1

1

D4

D4

D4

Voltage for MUTE OFF
Voltage for MUTE ON

80 dB

80 dB

V

5

V

5

0.5 V 1
0 0.1 V 1

V

= 4.8 V;

5

V

≤1.0 V

7

V

=0V;

5

V

≤1.0 V

7

D4

D4

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Test Circuit 1

TDA 4320X

Figure 3

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Application Circuit

TDA 4320X

Figure 4

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Diagrams

Diagram D1

TDA 4320X

V

Dynamics

F

V

The dynamic range of

voltage is determined by the test points M1 through M4 as

F

follows:
M1: test point (at

M2: test point (at V
M3: test point (at V
M4: test point (at V

= – 60 dBm) supplies V

iIF

= – 20 dBm) supplies V

iIF

= – 90 dBm) supplies V

iIF

= + 5 dBm) supplies V

iIF

F

F

F

(M4)

F

(M1)
(M2)
(M3)

V

Hence follows:

M
M
V

Semiconductor Group 46 04.96

:= – 20 dBm + (V

VF max

:= – 60 dBµV – (V

VF min

F Dynamics

= M

VF max

– M

(M4) – VF(M2))/(VF(M2) – VF(M1)) × 40 dB

F

(M1) – VF(M3))/(VF(M2) – VF(M1)) × 40 dB

F

VF min

Diagram D2

TDA 4320X

Test points to determine VF linearity:

V

is determined at 25 °C

F

Slope:

m = (V

The tolerance range of the

V
V

The

F max

F min

= V

= V

V

values within the VF dynamic range (M

F

(M2) – VF(M1))/40 dB.

F

V

-linearity is determined by two parallel lines:

F

(M1) + m(M + 60 dB + 1 dB)

F

(M1) + m(M + 60 dB – 1 dB)

F

predetermined tolerance range:

V

F min

≤ V

(M) ≤ V

F

VF min

F max

≤ M ≤ M

) must be inside the

VF max

Semiconductor Group 47 04.96

Diagram D3

TDA 4320X

Test points to determine VF temperature drift:

V

-temperature drift: it is determined within – 40 to + 85 °C.

F

Slope:

m = (V

The tolerance range of the

V
V

The
(

F max

F min

M

= V

= V

V

values for temperatures between – 40 to + 85 °C within the VF dynamic range

F

≤ VF ≤ M

VF min

(M2) – VF(M1))/40 dB (at 25 °C).

F

V

-temperature is determined by two parallel lines:

F

(M1) + m(M + 60 dB + 3 dB)

F

(M1) + m(M + 60 dB – 3 dB)

F

) must be inside the predetermined tolerance field:

VF max

V

F min

≤ V

(M) ≤ V

F

F max

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Diagram D4
Mute Characteristics

TDA 4320X

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5 Package Outlines

P-DSO-16-1

(Plastic Dual Small Outline Package)

TDA 4320X

Sorts of Packing

Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”.

SMD = Surface Mounted Device

GPS05119

Dimensions in mm

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