TDA7403 데이터 시트보기 (PDF) - STMicroelectronics

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TDA7403

BASIC SIGNAL PROCESSOR

STMicroelectronics 

TDA7403

NOISE BLANKER PART

internal 2nd order 140kHz high pass filter

programmable trigger threshold

additional circuits for trigger adjustment (devia-

tion, field-strenght)

very low offset current during hold time

four selectable pulse suppression times

ELECTRICAL CHARACTERISTICS (continued)

Symbol

VTR

VTRNOISE

VRECT

VRECT DEV

VRECT FS

Parameter

Trigger Threshold 0) 1)

Noise Controlled Trigger

Threshold 2)

Rectifier Voltage

deviation dependent

rectifier Voltage 3)

Fieldstrength Controlled

Rectifier Voltage 4)

Test Condition

meas. with VPEAK = 0.9V NBT = 111

NBT = 110

NBT = 101

NBT = 100

NBT = 011

NBT = 010

NBT = 001

NBT = 000

meas. with VPEAK = 1.5V NCT = 00

NCT = 01

NCT = 10

NCT = 11

VMPX = 0mV

VMPX = 50mV; f = 150KHz

VMPX = 100mV; f = 150KHz

means. with

VMPX = 800mV

(75KHz dev.)

OVD = 11

OVD = 10

OVD = 01

OVD = 00

means. with

VMPX = 0mV

VLEVEL << VSBL

(fully mono)

FSC = 11

FSC = 10

FSC = 01

FSC = 00

Min.

0) All thresholds are measured using a pulse with TR = 2 µs, THIGH = 2 µs and TF = 10 µs.

1) NBT represents the Noiseblanker-Byte bits D2; D0 for the noise blanker trigger threshold

2) NAT represents the Noiseblanker-Byte bit pair D4,D3 for the noise controlled trigger adjustment

3) OVD represents the Noiseblanker-Byte bit pair D7,D6 for the over deviation detector

4) FSC represents the Fieldstrength-Byte bit pair D1,D0 for the fieldstrength control

Typ.

30

35

40

45

50

55

60

65

260

220

180

140

0.9

1.7

2.5

0.9(off)

1.2

2.0

2.8

0.9(off)

1.3

1.8

2.3

Max.

Unit

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

mVOP

V

V

V

VOP

VOP

VOP

VOP

V

V

V

V

VIN

VOP

DC

D97AU636

TR THIGH

TF

Time

11/25

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