Specifications

2000 Jun 26 53
Philips Semiconductors Product specification
Digital servo processor and Compact Disc
decoder with integrated DAC for video CD (CD7 II)
SAA7327
Notes
1. Assumes use of external components as shown in the application diagram (Figs 38 or 39).
2. Highest clock frequency at which data slicer produces 1010 output in analog self-test mode.
3. The maximum input current depends on the value of the external resistor connected to I
ref
and the settings of shadow
registers A and C:
a) With R
Iref
=30kΩ, minimum I
max
= (0.025). I
ref
→ (0.025) × (40 µA) = 1 µA.
b) With R
Iref
=30kΩ, maximum I
max
= (0.4). I
ref
→ (0.4) × (40 µA)=16µA.
4. V
RIN
can be set to an internal source or an externally applied reference voltage using shadow register 7.
5. Measuring bandwidth: 200 Hz to 20 kHz, f
i(ADC)
= 1 kHz.
6. f
ripple
= 1 kHz, V
ripple
= 0.5 V (p-p).
7. Gain of the ADC is defined as G
ADC
=f
sys
/I
max
(counts/µA); thus digital output = I
i
× G
ADC
where:
a) Digital output = the number of pulses at the digital output in counts/s and I
i
= the DC input current in µA.
b) The maximum input current depends on R
Iref
and on shadow registers A and C.
c) The gain tolerance is the deviation from the calculated gain.
R
i(pu)
input pull-up resistance V
i
=0V − 120 − kΩ
C
i
input capacitance −−10 pF
V
OL
LOW-level output voltage I
OL
=1mA 0 − 0.4 V
I
OL
LOW-level output current −−1mA
C
L
load capacitance −−25 pF
t
o(f)
output fall time C
L
=20pF;
(V
DDD
− 0.4) to 0.4 V
−−15 ns
Crystal oscillator
INPUT: PIN CRIN (EXTERNAL CLOCK)
V
IL
LOW-level input voltage −0.3 − 0.2V
DD
V
V
IH
HIGH-level input voltage 0.8V
DD
− V
DD
+ 0.3 V
I
LI
input leakage current −10 − +10 µA
C
i
input capacitance −−10 pF
OUTPUT: PIN CROUT; SEE FIGS 3 AND 4
f
xtal
crystal frequency ±100 ppm 8 8.4672 35 MHz
g
m
mutual conductance at
start-up
17 −− mA/V
C
fb
feedback capacitance −−2pF
C
o
output capacitance −−7pF
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT