Philips TEA6823T-V1 Datasheet
DATA SH EET
Preliminary specification
File under Integrated Circuits, IC01
1998 Mar 24
INTEGRATED CIRCUITS
TEA6823T; TEA6825T
In Car Entertainment (ICE) car
radio
1998 Mar 24 2
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
FEATURES
General
• FM mixer for conversion from FM-IF
1
= 72.2 MHz to
FM-IF2= 10.7 MHz
• AM mixer for conversion from AM-IF1= 10.7 MHz to
AM-IF2= 450 kHz
• FM-IF gain stage
• Crystal oscillator providing mixer frequencies and
references for IF-count and stereo decoder
• FM quadrature demodulator with automatic centre
frequency adjustment and THD compensation
• Level, multi-path and noise detectors
• Soft mute
• Stereo noise cancelling and variable de-emphasis
• PLL stereo decoder
• Noise blanker
• AM IF-amplifier and demodulator
• I2C-bus transceiver with interface to enable direct data
transfer to radio front-end
• IF-count for AM and FM
• Reference frequency generation for PLL synthesizer.
Stereo decoder
• Adjustment-free PLL VCO
• Pilot depending mono/stereo switching
• Analog control of mono/stereo blend
• Adjacent channel noise suppression (114 kHz)
• Pilot cancelled
• Analog control of de-emphasis
• Integrated low-pass filters for 190 kHz adjacent channel
interferences and signal delay for interference
absorption circuit.
GENERAL DESCRIPTION
The TEA6823T together with the TEA6811T and the
TEA6825T together with the TEA6810T form an AM/FM
electronic tuned car radio in a double conversion receiver
concept.
ORDERING INFORMATION
TYPE NUMBER
PACKAGE
NAME DESCRIPTION VERSION
TEA6823T VSO56 plastic very small outline package; 56 leads SOT190-1
TEA6825T VSO56 plastic very small outline package; 56 leads; face down SOT190-2
1998 Mar 24 3
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
QUICK REFERENCE DATA
Note
1. IC is operating; specified parameters may deviate from limits which are valid for operating range.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
DDA1
analog supply voltage 1 (+5 V; pin 5) note 1 4.5 5.0 5.5 V
operating range 4.75 5.0 5.25 V
I
DDA1
analog supply current 1 (pin 5) FM mode 17 21 25 mA
AM mode 14 17 21 mA
I
19+I20
total FM mixer output current 4.8 6.0 7.2 mA
I
22+I23
total AM mixer output current 10 12 14 mA
V
DDA2
analog supply voltage 2 (pin 28) note 1 7.0 8.5 10 V
operating range 8.1 8.5 8.9 V
I
DDA2
analog supply current 2 (pin 28) FM mode 2.4 3.0 3.6 mA
V
DDA3
analog supply voltage 3 (+8.5 V; pin 56) note 1 7.0 8.5 10 V
operating range 8.1 8.5 8.9 V
I
DDA3
analog supply current 3 (pin 56) FM mode 19 24 28 mA
AM mode 9.5 12 15 mA
V
DDD
digital supply voltage 1 (+5 V; pin 52) note 1 4.5 5.0 5.5 V
operating range 4.75 5.0 5.25 V
I
DDD
digital supply current (pin 52) note 1 8 10 12 mA
signal plus noise-to-noise ratio FM mode;
∆f = 22.5 kHz at
pins 43 and 47
66 75 − dB
AM mode; m = 0.3 54 60 − dB
THD total harmonic distortion FM mode; ∆f=75kHz − 0.1 0.35 %
AM mode − 1.5 3 %
α
cs
channel separation (adjusted) 40 −−dB
T
amb
operating ambient temperature −40 − +85 °C
SN+
N
--------------
1998 Mar 24 4
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
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BLOCK DIAGRAM
n
dbook, full pagewidth
MGK693
DIGITAL
PHASE
DETECTOR
LOGIC
BLOCK
AM
DELOG
AMPLIFIER
PEAK
DETECTOR
AVERAGE
DETECTOR
AVERAGE
DETECTOR
MPX-
DECODER
AND
MATRIX
PILOT
CANCELLER
PILOT
DETECTOR
PHASE
DETECTOR
PEAK
DETECTOR
TEMP
COMPEN-
SATION
CURRENT
SWITCH
AM
R
C
THRESHOLD
CONTROL
MODULATION
DETECTOR
PULSE
FORMER
INTERFERENCE
DETECTOR
NOISE
DETECTOR
FM-LIMITER
AM-AMPLIFIER
LEVEL
DETECTOR
AFC
MPX
BUFFER
LOW
PASS
FILTER
HIGH
PASS
FILTER
SUPPLY
VCO
SOFT
MUTE
AM/FM
SWITCH
LEVEL
AMPLIFIER
÷N5
IF-
AMPLIFIER
IF
COUNTER
REFERENCE
FREQUENCY
20 kHz
BUFFER
ADC
MULTI-
PATH
ADC
LEVEL
I2C-BUS
220 kΩ
82 kΩ
100 kΩ
R41
4.3 kΩ
82 kΩ
100 kΩ
R39
100 kΩ
R40
10 nF
3.3 nF
220 nF
68 pF
27 kΩ
220 nF 22 nF
68 µF
62 pF
L13
HIGH
PASS
60 kHz
÷2/÷6
AM
FM
39214745254843
100 nF
36
100
nF
34 4238332322
1 kΩ
1.5 nF
SFP450
100 kΩ
R51
33 kΩ
33 kΩ
FMSTOP
LEVELADJ
AMSTOP
TOKO
P392BC-1977Z
TOKO
7PSAG-1946D = S
TR5
V
ref
V
ref
V
CC1
RDS
radio mute
radio mute
470 nF
6.8 nF
6.8 nF
820 kΩ
100 nF
120 kΩ
10 Ω
470 nF
38 kHz19 kHz
f
ref
V
int1
V
int2
V
int1
V
int2
26
31
44
30
41
32
56
4
12
5
mono
OSCILLATOR
56
pF
100 nF
100 nF
SFE10.7
10 nF
330 Ω
10.7 MHz
10.7 MHz
10.7 MHz
10.7 MHz
72.2 MHz
ZS369SCS-2144AJ TR3
22 nF
f
ref
37
35
27
28
29
19
20
13
8
10
6
14
9
11
7
54 53 55 40 50 3 46 16 49 15 17 18 51 21 52
24
PHILIPS
9922 521 00098
or Daiwa AT-49
61.5 MHz
10 kΩ10 kΩ
SDA
SCL
SDA
SCL
220 nF 220 nF
100 nF
100
nF
100
nF
100 nF
33 µF
100
nF
47 µF
100
nF
47 µF47 µF
22 µH
+8.5 V
V
CC
+8.5 V
V
CCA
+5 V
V
DDD
+5 V
V
ref
OUTLEFT
OUTRIGHT
V
CC
8.5 V
V
DDD
+5 V
10 kΩ
10 kΩ
12 kΩ
33 kΩ
3.3 MΩ
2.2 MΩ
1 MΩ
1.2 MΩ
330 Ω
330 Ω
level
TEA6823T
TEA6825T
tuning
mute
Fig.1 Block diagram.
1998 Mar 24 5
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
PINNING
SYMBOL PIN DESCRIPTION
QDET1 1 demodulator tank 1
QDET2 2 demodulator tank 2
TSWITCH 3 time switch input
AGND 4 analog ground
V
DDA1
5 analog supply voltage 1 (+5 V)
HFBUS1 6 HF bus 1 output;
pull-up to +5 V
HFBUS2 7 HF bus 2 output;
pull-up to +5 V
XTAL1 8 crystal oscillator 1
XTAL2 9 crystal oscillator 2
f
ref(p)
10 PLL reference frequency
output (p)
f
ref(n)
11 PLL reference frequency
output (n)
I
ref
12 reference current
FMIF1IN1 13 72 MHz FM-IF input 1
FMIF1IN2 14 72 MHz FM-IF input 2
TSDR 15 time constant for SDR
TSDS 16 time constant for SDS
V
SDS
17 SDS control voltage input
V
SDR
18 SDR control voltage input
FMIF2OUT1 19 FM mixer output 1
FMIF2OUT2 20 FM mixer output 2
V
ref
21 reference voltage output
AMIF2OUT1 22 AM mixer output 1
AMIF2OUT2 23 AM mixer output 2
FMAMDEC 24 FM/AM 10.7 MHz decoupling
PHASEDET 25 phase detector output
PILDET 26 pilot detector output
FMAM10.7 27 FM/AM 10.7 MHz input
V
DDA2
28 analog supply voltage 2
FMIFAMPOUT 29 FM-IF amplifier output
AFGND 30 AF ground
DEEMPHR 31 de-emphasis capacitor right
DEEMPHL 32 de-emphasis capacitor left
AMIF2IN1 33 AM-IF
2
input 1
AMIF2IN2 34 AM-IF
2
input 2
FMIN2 35 FM limiter input
DCFEED 36 DC feed FM limiter
FMIN1 37 FM limiter input
LEVELADJ 38 level adjustment input
C
AFC
39 AFC capacitor
MPBUF 40 multi-path buffer time constant
OUTLEFT 41 AF output left
FMSTOP 42 FMSTOP adjustment input
RDS/AMSTOP 43 MPX for RDS/AMSTOP
adjustment input
OUTRIGHT 44 AF output right
MPXIN 45 stereo decoder MPX input
THRES 46 threshold
MPXOUT 47 FM demodulator MPX output
AMAFOUT 48 AM demodulator AF output
V
mute/AML
49 mute voltage/AM level
LEVELUNWEIG 50 unweighted level output
IAC
CONTR
51 IAC control voltage
V
DDD
52 digital supply voltage
SDA 53 serial data input/output;
pull-up to +5 V
SCL 54 serial clock input;
pull-up to +5 V
DGND 55 digital ground
V
DDA3
56 analog supply voltage 3
(+8.5 V)
SYMBOL PIN DESCRIPTION
1998 Mar 24 6
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
Fig.2 Pin configuration for TEA6823T.
handbook, halfpage
TEA6823T
MHA700
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
V
DDA3
DGND
SCL
V
DDD
IAC
CONTR
V
mute/AML
SDA
LEVELUNWEIG
AMAFOUT
MPXOUT
THRES
MPXIN
OUTRIGHT
RDS/AMSTOP
FMSTOP
OUTLEFT
MPBUF
C
AFC
LEVELADJ
FMIN1
DCFEED
FMIN2
AMIF2IN2
AMIF2IN1
DEEMPHL
DEEMPHR
AFGND
FMIFAMPOUT
V
DDA2
FMAM10.7
PILDET
PHASEDET
FMAMDEC
AMIF2OUT2
AMIF2OUT1
V
ref
FMIF2OUT2
FMIF2OUT1
V
SDR
V
SDS
TSDS
TSDR
FMIF1IN2
FMIF1IN1
I
ref
f
ref(n)
f
ref(p)
XTAL2
XTAL1
HFBUS2
HFBUS1
V
DDA1
AGND
TSWITCH
QDET2
QDET1
Fig.3 Pin configuration for TEA6825T (top view).
handbook, halfpage
TEA6825T
MHA701
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
V
DDA3
DGND
SCL
SDA
V
DDD
IAC
CONTR
LEVELUNWEIG
V
mute/AML
AMAFOUT
MPXOUT
THRES
MPXIN
OUTRIGHT
RDS/AMSTOP
FMSTOP
OUTLEFT
MPBUF
C
AFC
LEVELADJ
FMIN1
DCFEED
FMIN2
AMIF2IN2
AMIF2IN1
DEEMPHL
DEEMPHR
AFGND
FMIFAMPOUT
QDET1
QDET2
TSWITCH
AGND
V
DDA1
HFBUS1
HFBUS2
XTAL1
XTAL2
f
ref(p)
f
ref(n)
I
ref
FMIF1IN1
FMIF1IN2
TSDR
TSDS
V
SDS
V
SDR
FMIF2OUT1
FMIF2OUT2
V
ref
AMIF2OUT1
AMIF2OUT2
FMAMDEC
PHASEDET
PILDET
FMAM10.7
V
DDA2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
FUNCTIONAL DESCRIPTION
Stereo decoder
By changing the value of the input resistor at pin 12 the
MPX input can be adapted to the level of the FM
demodulator output (see Fig.16).
A 3rd order low-pass filter (f
g
= 90 kHz) at the MPX input
provides an extra 190 kHz ACI suppression.
An interference gate is connected at the MPX demodulator
outputs. For AM the VCO is switched off.
1998 Mar 24 7
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Note
1. Charge device model class B: equivalent to discharging a 200 pF capacitor via a 0 Ω series resistor.
CHARACTERISTICS
V
56-4=V28-4
= 8.5 V; V
5-4=V52-55
=5V; T
amb
=25°C; f
mod
= 1 kHz; deviation = 22.5 kHz; Rg=50Ω; V
37-35
=10mV;
with de-emphasis = 50 µs; coil quality = 15; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
DDA1
analog supply voltage 1 (pin 5) −0.3 +6.5 V
V
DDA2
analog supply voltage 2 (pin 28) −0.3 +12 V
V
DDA3
analog supply voltage 3 (pin 56) −0.3 +12 V
V
DDD
digital supply voltage (pin 52) −0.3 +6.5 V
T
stg
storage temperature −55 +150 °C
T
amb
operating ambient temperature −40 +85 °C
V
es
electrostatic handling note 1
pins 8 and 9 −100 +100 V
all other pins −300 +300 V
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Currents
I
DDA1
analog supply current 1 (pin 5) FM mode 17 21 25 mA
AM mode 14 17 21 mA
I
DDA2
analog supply current 2 (pin 28) FM mode 2.4 3.0 3.6 mA
I
DDA3
analog supply current 3 (pin 56) FM mode 19 24 28 mA
AM mode 9.5 12 15 mA
I
DDD
digital supply current (pin 52) 8 10 12 mA
I
19+I20
total FM mixer output current 4.8 6.0 7.2 mA
I
22+I23
total AM mixer output current AM mode 10 12 14 mA
FM-IF path; see Fig.4
V
19-20 max(p-p)
maximum output voltage
(peak-to-peak value)
12.0 14.0 − V
I
19
; I
20
mixer bias current 2.4 3.0 3.6 mA
mixer leakage current in AM position −− 2 µA
I
19IF2/V13-14IF1
conversion gain 1.65 1.9 2.2 mS
R
i
input resistance (pins 13 to 14) 5 7 − kΩ
C
i
input capacitance (pins 13 to 14) − 3 4.5 pF
R
opt
optimum generator resistance − 1.2 − kΩ
R
o
output resistance (pins 19 to 20) 15 20 − kΩ
C
o
output capacitance (pins 19 to 4
and pins 20 to 4)
− 12 14 pF
IP3 third order intermodulation 114 124 − dBµV
1998 Mar 24 8
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
Oscillator
f
osc
oscillator frequency − 61.5 − MHz
∆f
osc
oscillator frequency spread −− 250 Hz
∆f
osc
/∆T temperature dependence of
oscillator frequency
crystal type Philips
9922 521 00098
− 30 × 10−6− K
−1
R
1
crystal motional resistance −− 70 Ω
C
0
crystal shunt capacitance −− 5pF
FM-IF
2
amplifier
V
27-24 max(rms)
maximum input voltage for 1 dB
compression point (RMS value)
80 110 − mV
V
29-4 max(rms)
maximum output voltage
(RMS value)
220 320 − mV
V
29-4/V27-24
amplifier gain RL= 330 Ω; see Fig.5 9 12 15 dB
∆V
29-4/V27-24
gain temperature dependence −25 °C<T
amb
< +85 °C − 0.1 − dB/K
R
i
input resistance (pins 27 to 24) 300 330 360 Ω
C
i
input capacitance (pins 27 to 4) −− 5pF
R
o
output resistance (pin 29) 300 330 360 Ω
C
o
output capacitance (pins 29 to 4) −− 5pF
FM-IF
2
limiter
V
o 1-2(p-p)
limiter output voltage
(peak-to-peak value)
500 700 − mV
V
1-2/V37-35
limiter gain see Fig.6 − 80 − dB
C
i
input capacitance (pins 37 to 4) −− 5pF
R
o
output resistance (pins 1 to 2) −− 1.0 kΩ
C
o
output capacitance (pins 1 to 2) 10 15 20 pF
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
1998 Mar 24 9
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
FM demodulator
V
47-4(rms)
MPX output voltage (RMS value) 160 200 240 mV
V
43-4(rms)
MPX output voltage for RDS
(RMS value)
160 200 240 mV
V
37-35(rms)
start of limiting voltage (RMS value) αAF= −3dB − 25 40 µV
V
37-35(rms)
input voltage for signal plus
noise-to-noise ratio (RMS value)
see Fig.7 for pin 47
(MPXOUT) and Fig.8 for
pin 43 (RDS/AMSTOP)
− 30 45 µV
− 70 100 µV
∆V
43DC
residual DC-offset voltage ∆L
demod
= typical value
10 µV<V
37-35
<80µV − 100 1000 mV
80 µV<V
37-35
< 800 mV − 10 30 mV
V
43FM/V43AM
AM suppression ∆f = 22.5 kHz;
f
modAM
= 1 kHz;
mAM= 30%;
V
37-35
= 3 to 300 mV
50 60 − dB
V
47FM/V47AM
AM suppression V
37-35
= 1 to 300 mV 50 60 − dB
∆V
43-44AFCdis
/∆V
43-44AFCactive
demodulator frequency control
voltage (AFC) efficiency
at 100 kHz detune from
exact tuning
28 32 − dB
R
o
output resistance (pin 47) −− 3kΩ
output resistance (pin 43) −− 1.5 kΩ
AF bandwidth (pin 43) 200 −−kHz
signal plus noise-to-noise ratio 66 75 − dB
THD total harmonic distortion detuning ≤50 kHz;
∆f = 75 kHz; f
mod
= 1 kHz
without de-emphasis;
L
demod
= typical value
pin 43;
V
37-35
= 300 µV
to 800 mV
− 0.1 0.35 %
pin 47;
V
37-35
= 1 to 800 mV
− 0.1 0.35 %
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
SN+
N
--------------
26 dB=
SN+
N
--------------
46 dB=
SN+
N
--------------
1998 Mar 24 10
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
Unweighted voltage level
V
50-4
unweighted voltage level see Fig.9; V38= 2.52 V
V
37-35
≤ 2.5 µV 1.6 2.2 3.0 V
V
37-35
= 1.0 mV 2.7 3.4 4.7 V
∆V
50-4
/∆V
37-35
slope of unweighted voltage level 100 µV (RMS) ≤ V
37-35
< 300 mV
temperature
compensation off
0.75 0.9 1.05 V/20 dB
temperature
compensation on
0.6 0.75 0.9 V/20 dB
∆V
50-4
/VK temperature dependence V
37-35
=1mV
temperature
compensation off
− 5.0 − mV/VK
temperature
compensation on
− 2.0 − mV/VK
I
50(max)source
maximum output source current 0.3 −−mA
I
50(max)sink
maximum output sink current −50 −−µA
R
o50
output resistance −− 300 Ω
ADJUSTMENT OF UNWEIGHTED VOLTAGE LEVEL AND V
mute/AML
; note 1
∆V
50
adjusting range voltage V
37-35
= 10 mV (RMS) −1.8 − +1.8 V
V
38-4
internal bias voltage − 2.6 − V
∆V
50-4
/∆V
38-4
adjusting gain −−0.9 −−
R
i38
input resistance − 80 − kΩ
MUTING DEPENDENCE ON ADJUST OF LEVEL UNWEIGHTED VOLTAGE; note 2
V
43/V47
start of mute V49/V21= 0.625 1 3 7 dB
mute slope V
43/V47
= −6dB − 25 − dB/V
Soft mute, time constant control, mono/stereo blend and high-cut control; see Fig.22
M
UTE VOLTAGE; note 3
V
49-4
mute voltage V38= 2.52 V
V
37-35
< 2.5 µV 1.8 2.2 3.2 V
V
37-35
= 1.0 mV 2.7 3.4 4.7 V
∆V
49-4
/∆V
37-35
slope of mute voltage 100 µV (RMS) ≤ V
37-35
< 300 mV
0.75 0.9 1.05 V/20 dB
∆V
49-4
/VK temperature dependency V
37-35
=1mV − 5.0 − mV/VK
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
∆V43V47⁄
∆V
49
--------------------------
1998 Mar 24 11
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
ATTACK AND DECAY TIME FOR MUTE VOLTAGE
I
ch
charge current pin 3 connected to GND − 3.5 −µA
pin 3 connected to pin 5 − 150 −µA
I
dch
discharge current pin 3 connected to GND −−4.0 −µA
pin 3 connected to pin 5 −−170 −µA
∆f muting activated by 60 kHz FM
interference
V49<3V; V
37-35
= 3 mV;
f
mod
= 60 kHz
pin 3 connected to GND;
V
43/V47
=9dB
− 40 − kHz
pin 3 connected to pin 5;
V
43/V47
=6dB
− 40 − kHz
V
43/V47
maximum mute depth by 60 kHz
FM interference
pin 3 connected to GND − 15 − dB
pin 3 connected to pin 5 − 10 − dB
T
IME CONSTANT FOR MONO/STEREO BLEND VOLTAGE; note 4
I
ch
charge current V
37-35
=3mV;
pin 3 connected to GND
− 0.6 −µA
V
37-35
=3mV;
pin 3 connected to pin 5
− 23 −µA
I
dch
discharge current V
37-35
=3mV;
pin 3 connected to GND
−−17 −µA
V
37-35
=3mV;
pin 3 connected to pin 5
−−750 −µA
m mono/stereo blend activated
by 20 kHz AM interference
V
16
<2V; V
37-35
= 3 mV;
R
L16
>50MΩ;
f
mod
= 20 kHz;
data byte 2 bit5=0
pin 3 connected to GND − 45 − %
pin 3 connected to pin 5 − 45 − %
data byte 2 bit5=1
pin 3 connected to GND − 55 − %
pin 3 connected to pin 5 − 55 − %
∆f mono/stereo blend activated
by 60 kHz FM interference
V16<2V; V
37-35
= 3 mV;
R
L16
>50MΩ;
f
mod
= 60 kHz
pin 3 connected to GND − 50 − kHz
pin 3 connected to pin 5 − 50 − kHz
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
1998 Mar 24 12
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
TIME CONSTANT FOR HIGH-CUT CONTROL VOLTAGE SDR; note 5
I
ch
charge current V
37-35
=3mV;
pin 3 connected to GND
− 0.6 −µA
V
37-35
=3mV;
pin 3 connected to pin 5
− 41 −µA
I
dch
discharge current V
37-35
=3mV;
pin 3 connected to GND
−−0.7 −µA
V
37-35
=3mV;
pin 3 connected to pin 5
−−44 −µA
m high-cut control activated
by 20 kHz AM interference
V
15
<2V; V
37-35
= 3 mV;
R
L15
>50MΩ;
f
mod
= 20 kHz
pin 3 connected to GND − 45 − %
pin 3 connected to pin 5 − 45 − %
∆f high-cut control activated
by 60 kHz FM interference
V
15
<2V; V
37-35
= 3 mV;
R
L15
>50MΩ;
f
mod
= 60 kHz
pin 3 connected to GND − 50 − kHz
pin 3 connected to pin 5 − 50 − kHz
M
ULTI-PATH DETECTOR
f
MP
multi-path detector band-pass
centre frequency
− 20 − kHz
B
MP
band-pass bandwidth 7.0 −−kHz
Reference voltage
V
21-4
output voltage I21= −1 mA 4.5 5.1 5.7 V
∆V
21-4
temperature dependence − 3.3 − mV/VK
I
21
output current −− 1mA
AM-IF path; see Fig.14 and notes 6 and 7
V
22-23 max(p-p)
maximum output voltage
(peak-to-peak value)
12 15 − V
I
22
, I
23
mixer bias current 5.0 6.0 7.0 mA
mixer leakage current in FM position −− 2 µA
I
22IF2/V27-24IF1
conversion transconductance 2.2 2.7 3.4 mS
R
27-24
input resistance 300 330 360 Ω
C
27-24
input capacitance − 58pF
R
22-23
output resistance 10.0 20.0 − kΩ
C
22-23
output capacitance − 510pF
IP3 third order intermodulation − 137 − dBµV
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
1998 Mar 24 13
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
Notes to the characteristics
1. For typical adjusting range see Figs 10 and 13.
2. For typical curve see Fig.11.
3. The static mute voltage follows the unweighted voltage level as function of FM-IF2 voltage and level adjustment
voltage V
38-4
. It additionally depends on multi-path level, noise (adjacent channel interferences) and the position of
TSWITCH (pin 3). For typical curve for mute voltage dependence see Fig.12.
4. The mono/stereo blend voltage is generated as a function of FM-IF2 voltage, multi-path level, noise and position of
TSWITCH.
5. The high-cut control voltage is generated as a function of FM-IF2 voltage, multi-path level, noise and position of
TSWITCH.
6. f
IF1
= 10.7 MHz; f
IF2
= 450 kHz for AM mixer.
7. The AM oscillator signal is generated by division of the 61.5 MHz crystal oscillator. Two divider ratios programmable
by the I2C-bus: divide by 6 (AM-IF1= 10.7 MHz); divide by 2 (AM-IF1= 30 MHz).
8. For typical AM level curve see Fig.15.
9. For AM detector; f
AMIF2
= 450 kHz; f
mod
= 400 Hz; m = 30%.
AM
DETECTOR; notes 8 and 9
V
48-4(rms)
AF output level (RMS value) R
L48
> 500 kΩ;
100 µV ≤ V
33-34
≤ 300 mV
190 240 290 mV
V
33-34(rms)
sensitivity voltage (RMS value) − 50 75 µV
− 200 400 µV
AM-IF
2
minimum input voltage
(RMS value)
THD ≤ 5%; m = 0.8 −− 100 µV
AM-IF
2
maximum input voltage
(RMS value)
THD ≤ 5%; m = 0.8 800 −−mV
R
33-34
IF2 input resistance 1.8 2.0 2.2 kΩ
C
24-23
IF2 input capacitance − 10 15 pF
R
o48
output resistance 27 33 39 kΩ
C
o48
output capacitance −− 10 pF
signal plus noise-to-noise ratio 54 60 − dB
THD total harmonic distortion m = 0.8;
300 µV ≤ V
33-34
≤ 200 mV
− 1.5 3.0 %
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
SN+
N
--------------
26 dB=
SN+
N
--------------
46 dB=
SN+
N
--------------
1998 Mar 24 14
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
STEREO DECODER CHARACTERISTICS
Input signal (∆f = 75 kHz) V
MPX(p-p)
= 1.7 V; f
mod
= 1 kHz; de-emphasis time constant t = 50 µs; nominal input resistor
(pin 45) Ri= 168 kΩ; T
amb
=25°C; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
44-4(rms)
;
V
41-4(rms)
AF output voltage (RMS value) 800 900 1000 mV
V
44-4
; V
41-4
DC output voltage 3.1 3.6 4.1 V
I
44(max)
; I
41(max)
maximum output current 150 −−µA
V
44-4/V41-4
difference of output voltage −1 − +1 dB
R
o(44)
; R
o(41)
output resistance −−600 Ω
R
Lmin
minimum load resistor 12 −−kΩ
α
cs
channel separation (adjusted) 40 −−dB
signal plus noise-to-noise ratio f = 20 Hz to 15 kHz 74 80 − dB
THD total harmonic distortion − 0.1 0.3 %
MPX input overdrive margin THD = 1% 4 −−dB
Carrier and harmonic suppression at the output; note 1
α
19
pilot signal f = 19 kHz − 50 − dB
α
38
subcarrier f = 38 kHz − 50 − dB
α
57
f = 57 kHz − 50 − dB
α
76
f = 76 kHz − 60 − dB
α
2
intermodulation f
mod
= 10 kHz; f
spur
= 1 kHz − 60 − dB
α
3
f
mod
= 13 kHz; f
spur
= 1 kHz − 58 − dB
α
57
traffic radio (ARI) f = 57 kHz − 70 − dB
α
67
subsidiary communications
authorization
f = 67 kHz 70 −−dB
α
114
adjacent channel frequency f = 114 kHz − 80 − dB
α
190
f = 190 kHz − 70 − dB
RR ripple rejection at output f
r
= 100 Hz; Vr= 100 mV (eff.) − 30 − dB
Mono/stereo control
V
i(pil)
pilot threshold voltage stereo on − 24 30 mV
mono on 8 20 − mV
∆V
i(pil)
switch hysteresis V
ion/Vioff
− 2 − dB
External mono/stereo control; note 2
V
17
− 0.75V
21
control voltage channel separation see Fig.17
V
43/V47
=6dB −−110 − mV
V
43/V47
=16dB −−40 − mV
SN+
N
--------------
1998 Mar 24 15
Philips Semiconductors Preliminary specification
In Car Entertainment (ICE) car radio TEA6823T; TEA6825T
Muting functions (mute via I2C-bus)
∆V
44
, ∆V
41
DC offset voltage tune mute −50 − +50 mV
radio mute (in combination
with tune mute)
−400 − +400 mV
α
mute
tune mute 60 −−dB
radio mute (in combination with
tune mute)
80 −−dB
High-cut control; see Fig.18
V
18
− 0.75V
21
control voltage note 3
t
de-emph
=50µs0−−mV
t
de-emph
=80µs −300 −−mV
t
de-emph
control range of de-emphasis 50 − 80 µs
Voltage controlled oscillator; note 4
f
osc
oscillator frequency 225 228 231 kHz
Noise blanker
I
NTERFERENCE DETECTION FULLY INTERNAL FROM LEVEL DETECTOR
t
sup
interference suppression time 40 50 −µs
TRIGGER THRESHOLD CONTROL
I
ch
charge current (into +4 V) − 45 −µA
I
dch
discharge current (from +8.5 V) −−900 −µA
TRIGGER SENSITIVITY MEASUREMENT WITH PULSED MODULATION OF FM-IF2; see Figs 19 and 20
V
37-35(p)
trigger sensitivity for test signal 1
(peak value)
V38= 2.52 V; note 5 −−0.5 mV
V
38
= 2.52 V; note 6 100 −−mV
trigger sensitivity for test signal 2
(peak value)
V
38
= 2.52 V; note 6 5.0 −−mV
V
38
= 2.52 V; note 6 100 −−mV
V
51
trigger threshold variation with
frequency modulation of FM-IF
2
and f
mod
= 15 kHz (pin 51)
V
37-35
= 100 mV; ∆f=0kHz − 6.4 − V
∆V
51
V
37-35
= 100 mV; ∆f=40kHz − 250 − mV
V
37th/V37(3dB)
shift of threshold for triggering
from MPX signal
I46= 0 14 20 26 dB
∆V
37th
/∆I
46
shift of threshold as function of I
46
−0.32 −0.25 −0.16 dB/µA
V
46
bias voltage (pin 46) I46< 0 4.0 4.3 4.7 V
I
46
> 0 5.3 5.7 6.1 V
I
offset
gate input offset current at pins 31
and 32 during suppression pulse
duration
− 20 50 nA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
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