Philips Semiconductors
Product specification
DVB selective AGC amplifier
TDA9888TS; TDA9889TS
SYMBOL
αN+1
PARAMETER
CONDITIONS
MIN.
30
TYP.
35
MAX.
UNIT
dB
suppression of IF input
frequencies below wanted
band at low IF output
input frequency between
21 and 31 MHz; referenced
to 36 MHz
−
C/N
carrier-to-noise ratio at low IF at ∆f = 4.9 MHz; note 4a;
112
90
116
100
−
−
−
−
dBc/Hz
dBc/Hz
dB
see Fig.5
at ∆f = 4.9 MHz; note 4b;
see Fig.5
αd3
intermodulation at
fLIF1 = 4.1 MHz or
fLIF2 = 5.9 MHz
fIF1 = fosc + 4.7 MHz and
fIF2 = fosc + 5.3 MHz;
see Fig.6
35
αd2
in-band harmonics
fIF1 = fosc + 1.31 MHz
40
−
−
dB
low IF = multiple of 1.31 MHz
up to 7.86 MHz
αH(spur)
in-band spurious elements
(1 to 9 MHz)
AC load: ZL(diff) > 1.7 kΩ
50
50
−
−
−
−
5
dB
dB
out-band spurious elements
(>9 MHz)
PSRR
power supply ripple rejection
[residual ripple FM, peak
deviation ∆f at 2 V (p-p) low IF
signal]
fripple = 70 Hz; see Fig.7
fripple = 1 kHz; see Fig.7
fripple = 10 kHz; see Fig.7
fripple = 100 kHz; see Fig.7
fripple = 70 Hz; see Fig.7
−
−
−
−
−
−
Hz
Hz
Hz
Hz
%
25
35
1400
2700
1.4
2000
4000
−
power supply ripple rejection
[residual ripple AM, modulation
factor m at 2 V (p-p) low IF
signal]
IF AGC control; pin AGC
Ii(sink)(max) maximum input sink current
Vi(max)
−
−
−
−
2
µA
maximum allowable input
voltage
VP
V
Gv
gain control voltage range
0
−
3
V
SAGC
negative control steepness
Gv = 0.8 to 2.2 V
−
45
−
dB/V
∆GIF/∆Vcon
Tuner AGC; pin TAGC, operating as current output; see Figs 3 and 4
Vi(IF)(min)(p-p) minimum controlled IF input
signal voltage between
RTOP = 22 kΩ;
ITAGC(sink) = 100 µA
−
81
84
dBµV
dBµV
pins IF1 and IF2
(peak-to-peak value)
Vi(IF)(max)(p-p) maximum controlled IF input
signal voltage between
RTOP = 0 Ω;
ITAGC(sink) = 100 µA
102
106
−
pins IF1 and IF2
(peak-to-peak value)
Vi(IF)/∆T
variation of AGC controlled IF RTOP = 8.2 kΩ;
input voltage with temperature ITAGC(sink) = 100 µA
−
−
0.07
600
dB/K
Isink
sink current (tuner AGC
discharge current)
VTAGC = 1 V
400
500
µA
2004 Nov 02
9