Philips Semiconductors
Sound fader control circuit
Preliminary specification
TEA6321
FEATURES
• Source selector for four stereo and one mono inputs
• Interface for noise reduction circuits
• Interface for external equalizer
• Volume, balance and fader control
• Special loudness characteristic automatically controlled
in combination with volume setting
• Bass control with equalizer filters
• Treble control
• Mute control at audio signal zero crossing
• Fast mute control via I2C-bus
• Fast mute control via pin
• I2C-bus control for all functions
• Power supply with internal power-on reset.
GENERAL DESCRIPTION
The sound fader control circuit TEA6321 is an I2C-bus
controlled stereo preamplifier for car radio hi-fi sound
applications.
QUICK REFERENCE DATA
SYMBOL
VCC
ICC
Vo(rms)
Gv
Gstep(vol)
Gbass
Gtreble
Gstep(treble)
(S+N)/N
RR100
αcs
PARAMETER
supply voltage
supply current
maximum output voltage level
voltage gain
step resolution (volume)
bass control
treble control
step resolution (treble)
signal-plus-noise to noise ratio
ripple rejection
channel separation
CONDITIONS
VCC = 8.5 V
VCC = 8.5 V; THD ≤ 0.1%
Vo = 2.0 V; Gv = 0 dB;
unweighted
Vr(rms) < 200 mV; f = 100 Hz;
Gv = 0 dB
250 Hz ≤ f ≤ 10 kHz; Gv = 0 dB
MIN.
7.5
−
−
−86
−
−18
−12
−
−
TYP.
8.5
26
2 000
−
1
−
−
1.5
105
MAX.
9.5
−
−
+20
−
+18
+12
−
−
UNIT
V
mA
mV
dB
dB
dB
dB
dB
dB
−
75
−
dB
90
96
−
dB
ORDERING INFORMATION
TYPE
NUMBER
TEA6321T
NAME
SO32
PACKAGE
DESCRIPTION
plastic small outline package; 32 leads; body width 7.5 mm
VERSION
SOT287-1
1995 Dec 19
2