TDA1074AN View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA1074AN Datasheet PDF : 15 Pages
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Philips Semiconductors
Dual tandem electronic
potentiometer circuit
Product specification
TDA1074A
GENERAL DESCRIPTION
The TDA1074A is a monolithic integrated circuit designed for use as volume and tone control circuit in stereo amplifiers.
This dual tandem potentiometer IC consists of two ganged pairs of electronic potentiometers with the eight inputs
connected via impedance converters, and the four outputs driving individual operational amplifiers. The setting of each
electronic potentiometer pair is controlled by an individual d.c. control voltage. The potentiometers operate by current
division between the arms of cross-coupled long-tailed pairs. The current division factor is determined by the level and
polarity of the d.c. control voltage with respect to an externally available reference level of half the supply voltage. Since
the electronic potentiometers are adjusted by a d.c. control voltage, each pair can be controlled by single linear
potentiometers which can be located in any position dictated by the equipment styling. Since the input feedback
impedances around the operational amplifier gain blocks are external, the TDA1074A can perform bass/treble and
volume/loudness control. It also can be used as a low-level fader to control the sound distribution between the front and
rear loudspeakers in car radio installations.
Features
• High impedance inputs to both ‘ends’ of each electronic potentiometer
• Ganged potentiometers track within 0,5 dB
• Electronic rejection of supply ripple
• Internally generated reference level available externally so that the control voltage can be made to swing positively
and negatively around a well-defined 0 V level
• The operational amplifiers have push-pull outputs for wide voltage swing and low current consumption
• The operational amplifier outputs are current limited to provide output short-circuit protection
• Although designed to operate from a 20 V supply (giving a maximum input and output signal level of 6 V), the
TDA1074A can work from a supply as low as 7,5 V with reduced input and output signal levels.
QUICK REFERENCE DATA
Supply voltage (pin 11)
Supply current (pin 11)
Input signal voltage (r.m.s. value)
Output signal voltage (r.m.s. value)
Total harmonic distortion
Output noise voltage (r.m.s. value)
Control range
Cross-talk attenuation (L/R)
Ripple rejection (100 Hz)
Tracking of ganged potentiometers
Supply voltage range
Operating ambient temperature range
PACKAGE OUTLINE
18-lead DIL; plastic (SOT102); SOT102-1; 1996 July 18.
VP
IP
Vi(rms)
Vo(rms)
THD
Vno(rms)
∆α
αct
α100
∆Gv
VP
Tamb
typ.
20 V
typ.
22 mA
max.
6V
max.
6V
typ.
0,05 %
typ.
50 µV
typ.
110 dB
typ.
80 dB
typ.
46 dB
typ.
0,5 dB
7,5 to 23 V
−30 to + 80 °C
December 1982
2
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