TDA7340G Datasheet, PDF (14/27 Pages) STMicroelectronics – AUDIO SIGNAL PROCESSOR

TDA7340G
NOISE BLANKER: SPKR LF
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
Noise Contrelled Trigger Adjustment (NAT) *)
at VPEAK = 1.5V
0
0
V_THNOISE = 140mV
0
1
V_THNOISE = 260mV
1
0
V_THNOISE = 220mV
1
1
VTHNOISE = 280mV
Noise Blanker Trigger Threshold Fine Adjust
0
The NBT Threshold is reduced by 5mV
1
Threshold is as defined above (35, 45, 55, 65mV)
NOISE BLANKER: SPKR LR
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
0
0
Over Deviation Detector (OVD) *)
( V_SB = V_R = -1V, fully mono)
V_PEAKDEV = 2.8V_OP
0
1
1
0
1
1
V_PEAKDEV = 2.0V_OP
V_PEAKDEV = 1.2V_OP
off
Noise Blanker Input Mode *)
0
Internal MPX trigger path is disabled and the
LEVEL pin is directly connected to the trigger
input (bypassing the high pass filter).
1
Internal MPX trigger path and the LEVEL pin via
the 120KHz high pass are connected (default)
NOISE BLANKER: SPKR RF
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
Field Strength Control (FSC) *)
( V_SS = V_R = -1V, fully mono)
0
0
V_PEAKFS = 2.4V
0
1
V_PEAKFS = 1.9V
1
0
V_PEAKFS = 1.4V
1
1
off
0
Blend Mode on
1
Blend Mode off
NOISE BLANKER: SPKR RR
MSB
LSB
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
Roll Off Compensation
0
0
1
13.8%
0
1
0
15.6%
0
1
1
17.4%
1
0
0
19.2%
1
0
1
21%
1
1
0
22.8%
1
1
1
24.6%
*) See Noise blanker description
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