SAA7284 Datasheet, PDF (25/40 Pages) NXP Semiconductors – Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems

Philips Semiconductors
Terrestrial digital sound decoder for
conventional intercarrier PLL-IF systems
Preliminary specification
SAA7284
SYMBOL
PARAMETER
CONDITIONS
SYSTEM BGH
Af_o
pass band cut-off attenuation
f_i = 5850 MHz
+ 182 kHz
FMr
FM rejection
f_i = 5.5 MHz
± 50 kHz
FMomr
FM rejection (overmodulated FM) f_i = 5.5 MHz
± 80 kHz
CCr
colour-carrier rejection
f_i = 4.43 MHz
Baseband demodulator output
REMO
V_o
K_p
f_p
Φ_offset
f_n
output voltage limits
carrier loop-phase detector gain
carrier loop pull-in frequency
carrier loop-phase detector offset
carrier loop bandwidth
(natural frequency)
system I
system B/G
phase shift = 45°
Baseband remodulator filter feedback
REMVE
V_o
carrier loop filter virtual earth
defined by V_RCF
voltage
Fine frequency calibration current (on to REMVE node)
I_source
I_sink
I_LI
f_fstep
output source current
output sink current
3-state leakage current
fine frequency calibration step
Voltage controlled oscillator
VCONT
V_i
input signal voltage
C_i
input capacitance
VCO (MEASURED AT V_CLK PIN)
f_VCO
VCO frequency after DAC
calibration
VCO frequency after fine
frequency calibration
K_VCO
VCO slope
DAC_STEP
ItoQ
VCO calibrating DAC step size
in-phase to quadrature phase
accuracy
ϕ_j
VCO phase jitter
1996 Oct 24
f_SYS = 6552 MHz
(system I) or
f_SYS = 5.85 MHz
(system BGH)
system I
system B/G
note 4
25
MIN.
TYP.
MAX.
UNIT
1.7
3.1
4.5
dB
−
50
−
dB
25
30
−
dB
66
73
−
dB
0.2
−
V_DD − 0.5 V
−
1.2
−
V/rad
−
0.9
−
V/rad
4
−
−
kHz
−4
0
+4
deg
2
−
5
kHz
−
0.5V_DDF2 −
V
−
15
−
15
−0.25
0
0.8
2
−
µA
−
µA
+0.25
µA
8
kHz
0.5
−
−
−
f_SYS − 75 −
f_SYS − 4 −
−139
−191
−50
−
−186
−255
+30
90
−
−
V_DD − 0.5 V
10
pF
f_SYS + 75 kHz
f_SYS + 4 kHz
−232
−319
+50
−
kHz/V
kHz/V
kHz
deg
8.1
ns