SAA7712H Datasheet, PDF (33/44 Pages) NXP Semiconductors – Sound effects DSP

Philips Semiconductors
Sound effects DSP
Preliminary specification
SAA7712H
14 OSCILLATOR CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
f_xtal
∆f_xtal(adj)
∆f_xtal(T)
α_f
V_xtal(M)
g_m(start)
g_m(oper)
C_L
N_cy(start)
I_xtal
P_xtal
V_i(clk)
R_xtal
R_o
crystal frequency
crystal frequency variation with
adjustment
crystal frequency variation with
temperature
spurious frequency attenuation
voltage across the crystal
(absolute peak value)
transconductance at start-up
transconductance when operating
capacitive load of clock output
number of cycles during start-up
supply current
drive level
external clock input voltage
allowed loss resistance of the
crystal
output resistance
T_amb = 25 °C
depends on quality of the
external crystal
at start-up
at oscillation
in slave mode
at oscillation
in slave mode
C_p = 5 pF⁽¹⁾; C1 = 10 pF;
C2 = 10 pF; see Fig.9
at start-up;
f_xtal = 18.432 MHz;
V_{DD_OSC} = 3.3 V
Note
1. C_p is the parasitic parallel capacitance of the crystal.
MIN.
10.000
−30
−30
20
1.6
10.5
3.6
−
−
−
−
−
−
3
−
750
TYP.
−
−
−
−
2.6
19
−
15
1 000
7
0.6
0.65
0.4
3.3
20
1 300
MAX.
19.456
+30
+30
−
3.6
32
38
−
−
15
2
0.9
0.5
3.6
100
2 800
UNIT
MHz
ppm
ppm
dB
V
mS
mS
pF
cycles
mA
mA
mA
mW
V
Ω
Ω
1999 Aug 05
33