saa7825 NXP Semiconductors, saa7825 Datasheet - Page 70

• Manufacturer Part Number: saa7825
• Description: Cd Audio Decoder, Digital Servo And Filterless Dac With Integrated Pre-amp And Laser Control
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2003 Aug 13
B
(THD + N)/S
S/N
G
Laser drive circuit (V
I
SNR
I
V
V
R
V
P
I
I
Digital inputs
P
V
V
V
I
t
P
V
V
P
V
V
o(LASER)
LFPOWER(max)
pd
LASER(off)
PU
W(L)
G
LF
cs(LF)
MONITOR1
MONITOR2
sense
step
IN
IH
IL
hys
INS
IH
IL
INS
IH
IL
i
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
tol(LF)
v(LF)
SYMBOL
LF
RESET (5 V
V1
TEST1
AND
LF
TO
V2 (CMOS
TEST4 (5 V
TOLERANT
low frequency bandwidth
(D1 to D4, R1 and R2)
low frequency total
harmonic distortion plus
noise-to-signal ratio
low frequency
signal-to-noise ratio
low frequency gain
tolerance
low frequency variation of
gain between channels
low frequency channel
separation
output current
signal-to-noise ratio
maximum laser supply
current
monitor diode voltage 1
monitor diode voltage 2
input resistance
sense voltage
laser output power range
power-down supply current
laser off current
HIGH-level input voltage
LOW-level input voltage
hysteresis voltage
pull-up current
pulse width (active LOW)
HIGH-level input voltage
LOW-level input voltage
HIGH-level input voltage
LOW-level input voltage
DDA
PARAMETER
INPUTS
; TTL
= 3.3 V; V
TOLERANT
)
INPUTS WITH PULL
SSA
; TTL
= 0 V; T
INPUTS WITH PULL
at 0 dB
at 0 dB
V
(V
I
I
maximum power;
sel180 = 0
maximum power;
sel180 = 1
V
notes 6 and 7
RESET only
o
o
LASER
i
amb
= 50 mA; B = 20 MHz
= 120 mA
DDA
-
= 0 to V
UP RESISTOR AND HYSTERESIS
CONDITIONS
= 25 C; R
= 1 V
0.6 V)
DDD
70
;
-
DOWN RESISTORS
IREF
= 30 k )
20
55
10
140
170
10
43
2.0
0.3
1
2.0
2.0
20
3
100
31
MIN.
)
)
60
50
40
150
180
50
TYP.
Objective specification
+20
+3
120
140
160
190
+100
100
10
30
0.8
0.8
0.8
40
68
MAX.
SAA7825
kHz
dB
dB
%
%
dB
mA
dB
mA
mV
mV
M
mV
%
m
V
V
V
V
V
V
V
UNIT
A
A
s
A