TDA7421N datasheet(3/38 Pages) STMICROELECTRONICS

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TDA7421N

ABSOLUTE MAXIMUM RATINGS

THERMAL DATA

PIN DESCRIPTION

Symbol

Parameter

Value

Unit

Tamb

Operating Temperature Range

-40 to 85

°C

Tstg

Storage Temperature Range

-55 to 150

°C

VCC

Analog Supply Voltages (PLL, RF, IF1, IF2, OSC)

10.2

VDD

Digital Supply Voltage

5.5

Symbol

Parameter

Typ. Value

Unit

Rth j-amb, fa

Thermal Resistance Junction-Ambient, Free Air

°C/W

Rth j-amb, sol

Thermal Resistance Junction-Ambient, Soldered

°C/W

Name

Function

AM MIX1 IN -

AM 1st mixer negative input (differential -)

AM MIX1 IN +

AM 1st mixer positive input (differential +)

FM MIX1 IN -

FM mixer negative input (differential -)

FM MIX1 IN +

FM mixer positive input (differential +)

FM RF AGC IN

RF AGC input

FM AGC OUT

FM AGC output voltage

RF GND

RF ground

VCO B

Local oscillator input to the transistor base

VCO E

Local oscillator input to the transistor emitter

OSC GND

Oscillator ground

XTAL D

Crystal oscillator MOS amplifier output

XTAL G

Crystal oscillator MOS amplifier input

OSC VCC

Oscillator positive supply

FM ANT ADJ

Tuning varicap voltage for antenna FM filter

FM RF ADJ

Tuning varicap voltage for RF FM filter

PLL VCC

PLL positive supply

LP OUT

Op Amp output to PLL loop filters

LP IN1

FM loop filter connection to op-amp inverting input

LP IN2

AM loop filter connection to op-amp inverting input

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