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參數(shù)資料
| 型號(hào)： | TDA8745H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Satellite sound receiver with I2C-bus control |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 文件頁(yè)數(shù)： | 21/40頁(yè) |
| 文件大?。?/td> | 261K |
| 代理商： | TDA8745H |
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1996 Mar 11
21
Philips Semiconductors
Preliminary specification
Satellite sound receiver with I
2
C-bus control
TDA8745
AC CHARACTERISTICS
All voltages referenced to ground (pins 6, 10, 14 and 32); in accordance with the block diagram (see Fig.1);
V
P1
= V
P2
= 5 V; V
P3
= 12 V; T
amb
= 25
°
C; f
mod
= 1 kHz;
f
M
= 46 kHz;
f
S1
=
f
S2
= 27 kHz (reference levels);
f
OM
= 10.7 MHz; f
OS1
= 10.7 MHz; f
OS2
= 10.52 MHz; IF level at pins 9, 11, 13, 15, 7 and 8 = 20 mV (RMS value) and
SFE 10.7MJA (narrow), SFE 10.52MJA (narrow) and SFE 10.7MS3 (wide) ceramic filters; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Band-pass filter, mixer and buffer
R
i
V
i(rms)
V
3
H
l
/H
h
input resistance
baseband input voltage (RMS value)
1 dB compression point (RMS value)
filter transfer at 200 kHz
with respect to 7.3 MHz
filter transfer at 2 MHz
with respect to 7.3 MHz
filter transfer at 5.3 MHz
with respect to 7.3 MHz
filter transfer at 7.3 MHz and
mixer amplification
filter transfer at 7.3 MHz and
mixer conversion gain
mixer output current (peak)
mixer output resistance
10
12.5
180
15
200
60
k
mV
mV
dB
note 1
V
3
V
5
= 1 dB; note 2
H
lm
/H
h
28
20
dB
H
mh
/H
h
2
+2
+4
dB
H
h
*A
15
17
19
dB
H
h
*C
note 3
10
12
14
dB
I
o(p)
R
o
5
7
12
30
mA
f = 10.7 MHz; note 4
Charge pump, buffer amplifier and VCO
t
S
VCO
f
VCO
repetition time of charge pump pulses
VCO sensitivity
VCO frequency
50
9
35.4
μ
s
MHz/V
MHz
note 5
V
loopf
= 2.6 V
Crystal oscillator (4 MHz)
f
xtal
R
xtal
C
xtal
I
i(p)
crystal oscillator frequency
resonance resistance of crystal
parallel capacitance of crystal
input current from external 4 MHz
source (peak)
50
4
4.5
60
10
MHz
pF
μ
A
note 6
IF inputs (pins 9, 11, 13, 15, 7 and 8) and limiters
V
IN-1 to IN-6(rms)
input sensitivity (RMS value)
S/N(A) = 40 dB;
f
S
= 27 kHz; NR = on;
de-emphasis = 75
μ
s
S/N(A) = 40 dB;
f
M
= 46 kHz; NR = off;
de-emphasis = 50
μ
s
THD
≤
0.5%
0.3
1
mV
0.8
2
mV
V
i1
to V
i6
input signal
200
mV
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