TDA7411 datasheet(20/43 Pages) STMICROELECTRONICS

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TDA7411

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0) All Thresholds are measured using a pulse with TR =2

µs, THIGH = 2µs and TF = 10µs. The repetition rate must not increase the PEAK

voltage.

Figure 14. Timing

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 triggeradjustment

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

5) BLT represents the Speaker RR Byte bit pair D7, D6 for the blanktime adjustment

6) NRD represents the Configuration-Byte bit pair D1, D0 for the noise rectifier discharge-adjustment

7) PCH represents the Stereodecoder-Byte bit D5 for the noise rectifier charge-current adjustment

8) MPNB represents the HighCut-Byte bit D7 and the Fieldstrength-Byte D7 for the noise rectifier multipath adjustment

VRECT DEV deviation dependent

rectifier Voltage 3)

means. with

VMPX = 500mV

(75KHz dev.)

OVD = 11

0.5

0.9(off)

1.3

VOP

OVD = 10

0.9

1.2

1.5

VOP

OVD = 01

1.7

2.0

2.3

VOP

OVD = 00

2.5

2.8

3.1

VOP

VRECT FS Fieldstrength Controlled

Rectifier Voltage 4)

means. with

VMPX = 0mV

VLEVEL << VSBL

(fully mono)

FSC = 11

0.5

0.9(off)

1.3

FSC = 10

0.9

1.4

1.5

FSC = 01

1.7

1.9

2.3

FSC = 00

2.1

2.4

3.1

Suppression Pulse

Duration 5)

Signal HOLDNin Testmode

BLT = 00

µs

BLT = 10

µs

BLT = 01

25.5

µs

BLT = 00

µs

VRECTADJ Noise Rectifier discharge

adjustment 6)

Signal PEAK in Testmode

NRD = 00 6)

(c)

0.3

(c)

V/ms

NRD = 01 6)

(c)

0.8

(c)

V/ms

NRD = 10 6)

(c)

1.3

(c)

V/ms

NRD = 11 6)

(c)

2.0

(c)

V/ms

SRPEAK

Noise Rectifier Charge

Signal PEAK in Testmode

PCH = 0 7)

(c)

mV/

µs

PCH = 1 7)

(c)

mV/

µs

VADJMP

Noise Rectifier adjustment

through Multipath 8)

Signal PEAK in Testmode

MPNB = 00 8)

(c)

0.3

(c)

V/ms

MPNB = 01 8)

(c)

0.5

(c)

V/ms

MPNB = 10 8)

(c)

0.7

(c)

V/ms

MPNB = 11 8)

(c)

0.9

(c)

V/ms

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VOP

VIN

THIGH

Time

D97AU636

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