Philips (Now NXP) TDA1524A Schematic [ru]

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TDA1524A

Stereo-tone/volume control circuit

Product specification
File under Integrated Circuits, IC01

September 1987

Philips Semiconductors Product specification

Stereo-tone/volume control circuit TDA1524A

GENERAL DESCRIPTION

The device is designed as an active stereo-tone/volume control for car radios, TV receivers and mains-fed equipment.
It includes functions for bass and treble control, volume control with built-in contour (can be switched off) and balance.
All these functions can be controlled by d.c. voltages or by single linear potentiometers.

Features

• Few external components necessary

• Low noise due to internal gain

• Bass emphasis can be increased by a double-pole low-pass filter

• Wide power supply voltage range.

QUICK REFERENCE DATA

Supply voltage (pin 3) V
Supply current (pin 3) I

= V

P

3-18

= I

P

3

typ. 12 V
typ. 35 mA

Maximum input signal with

d.c. feedback (r.m.s. value) V

i(rms)

typ. 2,5 V

Maximum output signal with

d.c. feedback (r.m.s. value) V
Volume control range G
Bass control range at 40 Hz ∆G
Treble control range at 16 kHz ∆G

o(rms)

v

v
v

typ. 3 V

−80 to + 21,5 dB

−19 to + 17 dB

typ. ±15 dB
Total harmonic distortion THD typ. 0,3 %
Output noise voltage (unweighted; r.m.s. value)

at f = 20 Hz to 20 kHz; V
for max. voltage gain V
for voltage gain G

v

= 12 V;

P

= −40 dB V

no(rms)
no(rms)

typ. 310 µV

typ. 100 µV
Channel separation

at Gv = −20 to + 21,5 dB α

cs

typ. 60 dB
Tracking between channels

at Gv= −20 to + 26 dB ∆G

v

max. 2,5 dB
Ripple rejection at 100 Hz RR typ. 50 dB
Supply voltage range (pin 3) V
Operating ambient temperature range T

P
amb

= V

3-18

7,5 to 16,5 V

−30 to + 80 °C

PACKAGE OUTLINE

18-lead DIL; plastic (SOT102); SOT102-1; 1996 July 22.

September 1987 2

Philips Semiconductors Product specification

Stereo-tone/volume control circuit TDA1524A

September 1987 3

Fig.1 Block diagram and application circuit with single-pole filter.

(1) Series resistor is recommended in the event of the capacitive loads exceeding 200 pF.

Philips Semiconductors Product specification

Stereo-tone/volume control circuit TDA1524A

Fig.2 Double-pole low-pass filter for improved bass-boost.

Fig.3 D.C. feedback with filter network for improved signal handling.

September 1987 4

Philips Semiconductors Product specification

Stereo-tone/volume control circuit TDA1524A

RATINGS

Limiting values in accordance with the Absolute Maximum System (IEC 134)
Supply voltage (pin 3) V
Total power dissipation P
Storage temperature range T
Operating ambient temperature range T

D.C. CHARACTERISTICS

= V

V

P

3-18

= 12 V; T

= 25 °C; measured in Fig.1; RG≤ 600 Ω; RL≥ 4,7 kΩ; CL≤ 200 pF; unless otherwise specified

amb

PARAMETER SYMBOL MIN. TYP. MAX. UNIT

Supply (pin 3)

Supply voltage V

P

= V

3-18

7,5 − 16,5 V

Supply current

at VP = 8,5 V IP = I
at V

= 12 V IP = I

P

at V

= 15 V IP = I

P

3
3
3

19 27 35 mA
25 35 45 mA
30 43 56 mA

D.C. input levels (pins 4 and 15)

at VP = 8,5 V V
at V

= 12 V V

P

at V

= 15 V V

P

4,15-18
4,15-18
4,15-18

3,8 4,25 4,7 V
5,3 5,9 6,6 V
6,5 7,3 8,2 V

D.C. output levels (pins 8 and 11)

under all control voltage conditions
with d.c. feedback (Fig.3)

at V

= 8,5 V V

P

at V

= 12 V V

P

at V

= 15 V V

P

8,11-18
8,11-18
8,11-18

3,3 4,25 5,2 V
4,6 6,0 7,4 V
5,7 7,5 9,3 V

Pin 17

Internal potentiometer supply voltage

at V

= 8,5 V V

P

Contour on/off switch (control by I

)

17

contour (switch open) −I

linear (switch closed) −I

17-18

17
17

3,5 3,75 4,0 V

−−0,5 mA
1,5 − 10 mA

Application without internal potentiometer

supply voltage at VP ≥ 10,8 V

(contour cannot be switched off)

Voltage range forced to pin 17 V

17-18

4,5 − VP/2−V

P
tot
stg
amb

= V

max. 20 V

3-18

max. 1200 mW

−55 to + 150 °C

−30 to +80 °C

BE

V

September 1987 5

Philips Semiconductors Product specification

Stereo-tone/volume control circuit TDA1524A

PARAMETER SYMBOL MIN. TYP. MAX. UNIT

D.C. control voltage range for volume,

bass, treble and balance

(pins 1, 9, 10 and 16 respectively)
at V
using internal supply V

Input current of control inputs

(pins 1,9,10 and 16) −I

A.C. CHARACTERISTICS

= V

V

P

treble controls in mid-position; R

Control range

Max. gain of volume (Fig.5) G
Volume control range; G
Balance control range; G
Bass control range at 40 Hz (Fig.7) ∆G
Treble control range at 16 kHz (Fig.8) ∆G
Control characteristics see Fig.9 and 10

Signal inputs, outputs

Input resistance; pins 4 and 15 (note 1)

at gain of volume control:G

Output resistance (pins 8 and 11) R

Signal processing

Power supply ripple rejection

at V

Channel separation (250 Hz to 10 kHz)

at Gv = −20 to + 21,5 dB α

Spread of volume control with

constant control voltage V

Gain tolerance between left and right

channel V

Tracking between channels

for G
f = 250 Hz to 6,3 kHz; balance adjusted at
G

= 5 V V

17-18

= 8,5 V; T

3-18

= 25 °C; measured in Fig.1; contour switch closed (linear position); volume, balance, bass, and

amb

≤ 600 Ω; RL ≥ 4,7 kΩ; CL ≤ 200 pF; f = 1 kHz; unless otherwise specified

G

1,9,10,16
1,9,10,16

1,9,10,16

PARAMETER SYMBOL MIN. TYP. MAX. UNIT

v max/Gv min

= 0 dB (Fig.6) ∆G

v

= 20 dB R

v

G

= −40 dB R

v

≤ 200 mV; f = 100 Hz; Gv = 0 dB RR 35 50 − dB

P(rms)

= 0,5 V

1-18

= V

16-18

= 21,5 to −26 dB

v

= 10 dB ∆G

v

1-18

= 0,5 V

17-18

17-18

∆G

∆G

∆G

1,0 − 4,25 V
0,25 − 3,8 V

−−5µA

v max

v
v
v
v

i4,15
i4,15
o8,11

cs

v

v,L-R

v

20,5 21,5 23 dB
90 100 − dB

−−40 − dB

−−19 to + 17 ± 3dB

−± 15 ± 3 − dB

10 −−kΩ

− 160 − kΩ

−−300 Ω

46 60 − dB

−−±3dB

−−1,5 dB

−−2,5 dB

September 1987 6