SAA7824 Datasheet, PDF (70/89 Pages) NXP Semiconductors – CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)

Philips Semiconductors
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
Product specification
SAA7824
SYMBOL
PARAMETER
CONDITIONS
MIN.
B_LF
low frequency bandwidth at 0 dB
20
(D1 to D4, R1 and R2)
(THD + N)/S_LF low frequency total
at 0 dB
−
harmonic distortion plus
noise-to-signal ratio
S/N_LF
low frequency
55
signal-to-noise ratio
G_tol(LF)
low frequency gain
−20
tolerance
∆G_v(LF)
low frequency variation of
−3
gain between channels
α_cs(LF)
low frequency channel
−
separation
Laser drive circuit (V_DDA = 3.3 V; V_SSA = 0 V; T_amb = 25 °C; R_IREF = 30 kΩ)
I_o(LASER)
SNR
I_LFPOWER(max)
output current
signal-to-noise ratio
maximum laser supply
current
V_LASER = 1 V −
10
(V_DDA − 0.6 V)
I_o = 50 mA; B = 20 MHz −
I_o = 120 mA
−
V_MONITOR1
monitor diode voltage 1 maximum power;
140
sel180 = 0
V_MONITOR2
monitor diode voltage 2 maximum power;
170
sel180 = 1
R_i
V_sense
P_step
I_pd
I_LASER(off)
input resistance
sense voltage
laser output power range
power-down supply current
laser off current
10
−100
43
−
−
Digital inputs
PIN RESET (5 V TOLERANT; TTL INPUTS WITH PULL-UP RESISTOR AND HYSTERESIS)
V_IH
HIGH-level input voltage
2.0
V_IL
LOW-level input voltage
−
V_hys
hysteresis voltage
0.3
I_PU
pull-up current
V_i = 0 to V_DDD;
−31
notes 6 and 7
t_W(L)
pulse width (active LOW) RESET only
1
PINS V1 AND V2 (CMOS INPUTS)
V_IH
HIGH-level input voltage
2.0
V_IL
LOW-level input voltage
−
TYP.
−
MAX. UNIT
−
kHz
−50
−40
dB
−
−
dB
−
+20
%
−
+3
%
60
−
dB
50
120
mA
40
−
dB
−
140
mA
150
160
mV
180
190
mV
−
−
MΩ
−
+100 mV
−
100
%
−
10
µA
−
30
m^A
−
−
V
−
0.8
V
−
−
V
−
−68
µA
−
−
µs
−
−
V
−
0.8
V
2003 Oct 01
70