Philips TDA1523 Datasheet

INTEGRATED CIRCUITS

DATA SH EET

TDA1523

Stereo cassette head preamplifier and equalizer

Preliminary speciﬁcation File under Integrated Circuits, IC01

1996 Feb 26

Philips Semiconductors Preliminary speciﬁcation

Stereo cassette head preampliﬁer and equalizer

FEATURES

• Two independent amplifiers with open-loop gain of 90 dB (typical)

• Internal DC feedback via 140 kΩ resistor from output to feedback point

• AC characteristics that can be determined externally by an RC network

• Electronic on/off switching with transient suppression for switch on

• Head input at DC ground that eliminates the input coupling capacitor

• Minimum external component requirement

• Stability down to a gain of 30 dB

• Low input noise

• Low distortion

• DC input current <2 µA.

TDA1523

GENERAL DESCRIPTION

The TDA1523 is a playback amplifier for car radio/cassette players.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

P

T

amb

THD total harmonic distortion − 0.05 − %

α

cs

ORDERING INFORMATION

TYPE

NUMBER

TDA1523 DIP14 plastic dual in-line package; 14 leads (300 mil) SOT27-1

supply voltage (pin 7) 7.5 − 12 V supply current (pin 7) − 5 − mA operating ambient temperature −30 − +85 °C

channel separation RS=10kΩ; LS=0 45 −−dB

PACKAGE

NAME DESCRIPTION VERSION

1996 Feb 26 2

Philips Semiconductors Preliminary speciﬁcation

Stereo cassette head preampliﬁer and equalizer

BLOCK DIAGRAM

handbook, full pagewidth

C102

220

µF

V

i1

V

i2

C202

220

µF

R102

8.2 Ω

R = 300 Ω

S1

L = 80 mH

S1

MUTE

R = 300 Ω

S2

L = 80 mH

S2

8.2 Ω

R101

5.6 kΩ

feedback 1

2 3

1

5 6

feedback 2

R201R202

5.6 kΩ

TDA1523

140 kΩ

R

fb1

AMP 1

SUPPLY

&

MUTE

AMP 2

R

fb2

140 kΩ

C101

22 nF

C201

22 nF

TDA1523

C

c1

14

4

7

8

output 1

10 µF

C

c2

output 2

10 µF

V

P

MGC988

R

L1

4.7 kΩ

R

L2

4.7 kΩ

V

o1

V

o2

Fig.1 Block diagram with external components; also used as test circuit.

1996 Feb 26 3

Philips Semiconductors Preliminary speciﬁcation

Stereo cassette head preampliﬁer and equalizer

PINNING

SYMBOL PIN DESCRIPTION

MUTE 1 mute input FB1 2 feedback 1 V

i1

GND 4 ground V

i2

FB2 6 feedback 2 V

P

V

o2

n.c. 9 not connected n.c. 10 not connected n.c. 11 not connected n.c. 12 not connected n.c. 13 not connected V

o1

3 input voltage 1

5 input voltage 2

7 power supply 8 output voltage 2

14 output voltage 1

handbook, halfpage

1

MUTE

2

FB1

3

V

i1

4

GND

V

FB2

V

TDA1523

5

i2

6 7

P

MGC989

Fig.2 Pin configuration.

TDA1523

14

V

o1

13

n.c.

12

n.c.

11

n.c.

10

n.c.

9

n.c.

8

V

o2

1996 Feb 26 4

Philips Semiconductors Preliminary speciﬁcation

Stereo cassette head

TDA1523

preampliﬁer and equalizer

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134); note 1.

SYMBOL PARAMETER MIN. MAX. UNIT

V

P

I

fb

P

tot

T

amb

T

stg

Note

1. All pins except 2 and 6 (feedback) can be connected to VP (pin 7) or ground (pin 4).

CHARACTERISTICS

V

= 8.5 V; T

P

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply (pin 7)

V

P

I

P

Inputs (pins 3 or 5)

V

ni(rms)

V

ni

I

ni

, I

I

3

5

Z

 input impedance f = 1 kHz; note 1 200 −−kΩ

i

Outputs (pins 14 or 8); see Fig.7 V

o

I

O

V

O

V

no(rms)

V

no

V

no

Z

 output impedance f = 1 kHz; note 1 −−1kΩ

o

supply voltage (pin 7) 7.5 12 V feedback current (pins 2 and 6) − 10 mA total power dissipation − 300 mW operating ambient temperature −30 +85 °C storage temperature −55 +150 °C

=25°C; see test circuit Fig.1; unless otherwise speciﬁed.

amb

supply voltage 7.5 − 12 V supply current − 5 − mA

unweighted noise input voltage (RMS value)

noise input voltage RS= 0; f = 1 kHz; measured

f = 20 Hz to 20 kHz; measured in Fig.3

− 1.6 −

− 5 −

in Fig.3; see also Fig.5

noise input current f = 1 kHz; measured in Fig.3;

− 1.2 −