TDA8552T Datasheet, PDF (10/28 Pages) NXP Semiconductors – 2 x 1.4 W BTL audio amplifiers with digital volume control and headphone sensing

Philips Semiconductors
2 × 1.4 W BTL audio amplifiers with digital
volume control and headphone sensing
Preliminary specification
TDA8552T; TDA8552TS
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Volume control
t_W
pulse width
50
t_rep
pulse repetition time
100
V_th(up)
UP/DOWN pin UP threshold
4.1
level
V_{float(max)}
UP/DOWN pin floating high
−
level
V_{float(min)}
UP/DOWN pin floating low
1.0
level
V_th(down)
UP/DOWN pin DOWN
0
threshold level
I_I(up/down)
t_wait
t_rep
input current UP/DOWN pin 0 < V_UP/DOWN < V_DD
−
auto repeat wait time
−
repeat time
key pressed
−
Volume attenuator
G_v(l)
low gain; maximum volume
19
(including power amplifier)
low gain; minimum volume
tbf
(including power amplifier)
G_v(h)
high gain; maximum volume
29
(including power amplifier)
high gain; minimum volume
tbf
(including power amplifier)
N_step
number of gain steps
−
∆G_v
variation of gain per step
−
Z_i
input impedance
14
V_i(max)(rms)
maximum input voltage
−
(RMS value)
−
−
ns
−
−
ns
−
V_DD
V
−
3.4
V
−
−
V
−
0.6
V
−
200
µA
500
−
ms
130
−
ms
20
21
dB
−60
tbf
dB
30
31
dB
−50
tbf
dB
64
−
1.25
−
dB
20
−
kΩ
−
1.75
V
Notes
1. With a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal
to
2
×


D-----C------o---u----t-p----u---t---Ro----f-_Lf--s---e---t----v---o---l-t--a---g----e--


2. The DC output voltage with respect to ground is approximately 0.5V_DD.
3. Output voltage in mute position is measured with an input of 1 V (RMS) in a bandwidth of 20 kHz, so including noise,
gain select pin is LOW (0 V).
1998 Jun 02
10