Philips Semiconductors
Product specification
Hi-fi stereo audio processor; I2C-bus
TDA8425
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Total harmonic distortion
(f = 20 Hz to 12.5 kHz)
for Vi(rms) = 0.3 V;
gain = +6 dB to −40 dB
THD
−
−
−
0.05
−
%
%
%
for Vi(rms) = 0.6 V;
gain = 0 dB to −40 dB
THD
THD
0.07
0.1
0.4
for Vi(rms) = 2.0 V;
gain = −12 dB to −40 dB
−
Channel separation at 10 kHz
gain = 0 dB
αcs
−
−
−
80
−
−
−
dB
dB
dB
Ripple rejection (gain = 0 dB;
bass and treble in linear position)
fripple = 100 Hz
RR100
50
Crosstalk attenuation from logic
inputs to AF outputs (gain = 0 dB;
bass and treble in linear position)
αL
100
VOLUME CONTROL
For truth table see Table 6
Control range at f = 1 kHz (36 steps)
maximum voltage gain (6 dB step)
minimum voltage gain (−64 dB step)
mute position
Gmax
Gmin
Gmute
G
5
6
−
−
−
2
dB
dB
dB
dB
−63
−80
−
−64
−90
−
Gain tracking error; balance in mid-position
Step resolution
gain from 6 dB to −40 dB
Gstep
Gstep
1.5
1.0
2.0
2.0
2.5
3.0
dB/step
dB/step
gain from −42 dB to −64 dB
TREBLE CONTROL
For truth table see Table 8
Control range
for C8-5; C14-5 = 5.6 nF
Maximum emphasis at 15 kHz with
respect to linear position
Maximum attenuation at 15 kHz with
respect to linear position
Resolution
G
11
12
13
dB
G
11
12
13
dB
Gstep
2.5
3.0
3.5
dB/step
October 1988
12
NXP [ NXP ]
