TDA7421 Datasheet, PDF (3/38 Pages) STMicroelectronics – AM/FM TUNER FOR CAR RADIO AND Hi-Fi APPLICATIONS

ABSOLUTE MAXIMUM RATINGS
Symbol
Tamb
Tstg
VCC
VDD
Parameter
Operating Temperature Range
Storage Temperature Range
Analog Supply Voltages (PLL, RF, IF1, IF2, OSC)
Digital Supply Voltage
TDA7421
Value
Unit
-40 to 85
°C
-55 to 150
°C
10.2
V
5.5
V
THERMAL DATA
Symbol
R_{th j-amb}
Parameter
Thermal resistance Junction-Ambient
Value
typ.
68
PIN DESCRIPTION
N.
Name
1
AM MIX1 IN -
2
AM MIX1 IN +
3
FM MIX IN -
4
FM MIX IN +
5
FM RF AGC IN
6
FM AGC OUT
7
RF GND
8
VCO B
9
VCO E
10
OSC GND
11
XTAL D
12
XTAL G
13
OSC VCC
14
FM ANT ADJ
15
FM RF ADJ
16
PLL VCC
17
LP OUT
18
LP IN1
19
LP IN2
20
LP IN3
21
PLL VREF
22
PLL GND
23
SLEEP
24
SDA
25
SCL
Function
Input "-" to the AM 1st mixer (differential input)
Input "+" to the AM 1st mixer (differential input)
Input "-" to the FM mixer (differential input)
Input "+" to the FM mixer (differential input)
Input to the RF AGC circuit
Voltage output to the FM AGC
RF circuits ground
Local oscillator input to the transistor base (two-pin oscillator)
Local oscillator input to the transistor emitter (two-pin oscillator)
Oscillator ground
Crystal oscillator input to MOS drain (two-pin oscillator)
Crystal oscillator input to MOS gate (two-pin oscillator)
Oscillator positive supply
Tuning varicap voltage for antenna FM filter
Tuning varicap voltage for RF FM filter
PLL positive supply
Op Amp output to PLL loop filters
PLL "N. 1" loop filter connection to Op Amp inverting input
PLL "N. 2" loop filter connection to Op Amp inverting input
PLL "N. 3" loop filter connection to Op Amp inverting input
Voltage reference to Op Amp noninverting input
PLL ground
I²C bus disconnect signal
I²C bus data
I²C bus clock
Unit
°C/W
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