TDA7421N Просмотр технического описания (PDF) - STMicroelectronics

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производитель

TDA7421N

AM/FM tuner for car radio and Hi-Fi applications

STMicroelectronics 

TDA7421N

Electrical specifications

Table 7. Electrical characteristics (continued)

Symbol

Parameter

Test condition

Min. Typ.

CP1MIX 1dB compression point

fIN = 98.1 MHz

90

CAdj1

Value of the minimum adjusting

capacitance step

T1A3-0 set to 1000

0.38

FM AGC

Ref: FM test circuit, measure input at VFMRFAGCIN and VFMIFAGCIN, output at VFMAGCOUT

VRFAGCSTA Open loop RF AGC starting

RT

point

fRFAGCIN = 98.1 MHz

Value of VFMRFAGCIN at which

VFMAGCOUT = 4 V

80

RIN,RFAGC Input resistance

20

fIFAGCIN = 10.7 MHz

VIFAGCTART

Open loop IF AGC starting point

Value of VFMIFAGCIN at which

VFMAGCOUT = 4 V

77

FAGC2-0 set to 111

RIN,IFAGC Input resistance

ROUT,FMAGC Output resistance

FM IF amplifier 1

Ref: FM test circuit, measure input at VFMAMP1IN, output at VFMAMP1OUT

RIN,AMP1 Input resistance

ROUT,AMP1 Output resistance

GAMP1 Typical gain

fIN = 10.7 MHz

IP3AMP1

3rd order intermodulation

distortion intercept point

fd = 10.7 MHz; fu1= 10.8 MHz;

fu2= 10.9 MHz;

FBH3-0 set to 0100

20

10

330

330

18.5

CP1AMP1 1dB compression point

fIN = 10.7 MHz;

FBH3-0 set to 0100

FM IF amplifier 2

Ref: FM test circuit, measure input at VFMAMP2IN, output at VFMAMP2OUT

RIN,AMP2 Input resistance

f = 10.7 MHz

330

ROUT,AMP2 Output resistance

f = 10.7 MHz

330

GMIN,AMP2 Minimum gain

fIN = 10.7MHz, FBL1-0 set to 01

6

GMAX,AMP2 Maximum gain

fIN = 10.7MHz, FBL1-0 set to 00

10

IP3AMP2

3rd order intermodulation

distortion intercept point

fd = 10.7 MHz; fu1= 10.8 MHz;

fu2= 10.9 MHz;

FBL3-0 set to 0100

CP1AMP2 1dB compression point

fIN = 10.7 MHz;

FBL3-0 set to 0100

Max.

Unit

dBμV

pF

dBμV

KΩ

dBμV

KΩ

KΩ

Ω

Ω

dB

dBμV

dBμV

Ω

Ω

dB

dB

dBμV

dBμV

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