TEA6845AH Просмотр технического описания (PDF) - Philips Electronics
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TEA6845AH Datasheet PDF : 48 Pages
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Philips Semiconductors
New In Car Entertainment (NICE) car radio
Product specification
TEA6845AH; TEA6845H
SYMBOL
PARAMETER
tst
DAA output settling time
RR
ripple rejection
CL
DAA output load
capacitance
CONDITIONS
MIN.
0.2 V < VDAAOUT < 8.25 V;
−
CL = 270 pF
fripple = 100 Hz; VDDA4 = 1 mV −
VDAAOUT < 8.0 V; FM mode −
TYP.
−
50
−
DAA TEMPERATURE COMPENSATION: PIN DAATD
Isource
compensation diode
source current
0.2 V < VDAATD < 1.5 V
TCsource
temperature coefficient of 0.2 V < VDAATD < 1.5 V;
compensation diode
Tamb = −40 to +85 °C
source current
−50
−40
−3 × 10−10 −
IF counter (FM IF or AM IF2 counter)
NIF
IF counter length for
AM and FM
Tcount(IF)
IF counter period
Rprecount
FM IF counter prescaler
ratio
data byte 4: bit 7 = 1
data byte 4: bit 7 = 0
data byte 4: bit 3 = 1
data byte 4: bit 3 = 0
−
8
−
2
−
20
−
10
−
100
Reference frequency for car sound processor IC; note 3
REFERENCE FREQUENCY DIVIDER
Nref
crystal oscillator divider
ratio
fref
reference frequency
VOLTAGE GENERATOR; PIN fref
Vo(p-p)
AC output voltage
(peak-to-peak value)
VO
Ro
RL(min)
DC output voltage
output resistance
minimum load resistance
AM signal channel
fxtal = 20.5 MHz
−
272
−
75.368
60
100
3.2
3.4
−
−
1
−
AM RF AGC STAGE INPUTS: PINS AMMIX1IN1 AND AMMIX1IN2
Vi(p)
RF input voltage for AGC data byte 5: bit 5 = 0, bit 6 = 0 −
150
start level (peak value)
data byte 5: bit 5 = 1, bit 6 = 0 −
275
data byte 5: bit 5 = 0, bit 6 = 1 −
400
data byte 5: bit 5 = 1, bit 6 = 1 −
525
AM IF AGC STAGE INPUTS: PINS AMIF2IN AND AMIF2DEC
Vi(p)
IF2 input voltage (peak AGC start level
value)
0.20
0.27
AM RF AGC CURRENT GENERATOR OUTPUT: PIN IAMAGC
Isink(max)
maximum AGC sink
VAMMIX1IN1 > 500 mV
−
15
current
(peak value)
MAX.
30
UNIT
µs
−
dB
270
pF
−30
µA
+3 × 10−10 K−1
−
bit
−
ms
−
ms
−
−
−
−
kHz
170
mV
3.9
V
50
kΩ
−
MΩ
−
mV
−
mV
−
mV
−
mV
0.35
V
−
mA
2001 Apr 12
15
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