TDA7340G datasheet(14/27 Pages) STMICROELECTRONICS

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NOISE BLANKER: SPKR LF

MSB

LSB

FUNCTION

Noise Contrelled Trigger Adjustment (NAT) *)

at VPEAK = 1.5V

VTHNOISE = 140mV

VTHNOISE = 260mV

VTHNOISE = 220mV

VTHNOISE = 280mV

Noise Blanker Trigger Threshold Fine Adjust

The NBT Threshold is reduced by 5mV

Threshold is as defined above (35, 45, 55, 65mV)

NOISE BLANKER: SPKR LR

MSB

LSB

FUNCTION

Over Deviation Detector (OVD) *)

(VSB =VR = -1V, fully mono)

VPEAKDEV = 2.8VOP

VPEAKDEV = 2.0VOP

VPEAKDEV = 1.2VOP

off

Noise Blanker Input Mode *)

Internal MPX trigger path is disabled and the

LEVEL pin is directly connected to the trigger

input (bypassing the high pass filter).

Internal MPX trigger path and the LEVEL pin via

the 120KHz high pass are connected (default)

NOISE BLANKER: SPKR RF

MSB

LSB

FUNCTION

Field Strength Control (FSC) *)

(VSS =VR = -1V, fully mono)

VPEAKFS = 2.4V

VPEAKFS = 1.9V

VPEAKFS = 1.4V

off

Blend Mode on

Blend Mode off

NOISE BLANKER: SPKR RR

MSB

LSB

FUNCTION

Roll Off Compensation

13.8%

15.6%

17.4%

19.2%

101

21%

22.8%

24.6%

*) See Noise blanker description

TDA7340G

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