SAA7824 datasheet(70/89 Pages) PHILIPS

Part #	SAA7824

Description	CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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70 / 89 page

2003 Oct 01

70

Philips Semiconductors

Product speciﬁcation

CD audio decoder, digital servo and ﬁlterless

DAC with integrated pre-amp and laser control

SAA7824

BLF

low frequency bandwidth

(D1 to D4, R1 and R2)

at 0 dB

20

−−

kHz

(THD + N)/SLF

low frequency total

harmonic distortion plus

noise-to-signal ratio

at 0 dB

−−50

−40

dB

S/NLF

low frequency

signal-to-noise ratio

55

−−

dB

Gtol(LF)

low frequency gain

tolerance

−20

−

+20

%

∆G

v(LF)

low frequency variation of

gain between channels

−3

−

+3

%

αcs(LF)

low frequency channel

separation

−

60

−

dB

Laser drive circuit (VDDA = 3.3 V; VSSA =0V; Tamb =25 °C; RIREF =30kΩ)

Io(LASER)

output current

VLASER =1V −

(VDDA − 0.6 V)

10

50

120

mA

SNR

signal-to-noise ratio

Io = 50 mA; B = 20 MHz −

40

−

dB

ILFPOWER(max)

maximum laser supply

current

Io = 120 mA

−−

140

mA

VMONITOR1

monitor diode voltage 1

maximum power;

sel180 = 0

140

150

160

mV

VMONITOR2

monitor diode voltage 2

maximum power;

sel180 = 1

170

180

190

mV

Ri

input resistance

10

−−

M

Ω

Vsense

sense voltage

−100

−

+100

mV

Pstep

laser output power range

43

−

100

%

Ipd

power-down supply current

−−

10

µA

ILASER(off)

laser off current

−−

30

mA

Digital inputs

PIN RESET (5 V TOLERANT; TTL INPUTS WITH PULL-UP RESISTOR AND HYSTERESIS)

VIH

HIGH-level input voltage

2.0

−−

V

VIL

LOW-level input voltage

−−

0.8

V

Vhys

hysteresis voltage

0.3

−−

V

IPU

pull-up current

Vi = 0 to VDDD;

notes 6 and 7

−31

−−68

µA

tW(L)

pulse width (active LOW)

RESET only

1

−−µs

PINS V1 AND V2 (CMOS INPUTS)

VIH

HIGH-level input voltage

2.0

−−

V

VIL

LOW-level input voltage

−−

0.8

V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

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