View TDA7340_219748.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
TDA7340
AUDIO SIGNAL PROCESSOR
AUDIOPROCESSOR: MUTE, SOFT MUTE AND ZERO CROSSING MUTE ONE DIFFERENTIAL, TWO STEREO AND TWO MONO INPUTS DIFFERENTIAL PHONE INPUT VOLUME, BASS, TREBLE AND LOUDNESS CONTROL FOUR SPEAKER ATTENUATORS WITH INDEPENDENT ATTENUATION CONTROL STEREODECODER: ADJUSTMENT FREE INTEGRATED 456KHz VCO HIGH CUT CONTROL STEREO BLEND NOISE BLANKER: INTEGRATED HIGH-PASS FILTER NOISE RECTIFIER OUTPUT FOR QUALITY DETECTION PROGRAMMABLE TRIGGER THRESHOLD PAUSE DETECTOR: PROGRAMMABLE THRESHOLD ALLFUNCTIONS PROGRAMMABLEVIA I2C BUS DESCRIPTION The TDA7340 I2C bus controlled audio signal processor contains all signal processing blocks of a high performance car radio, including audioprocessor, stereodecoder, noise blanker, pause
PQFP44
ORDERING NUMBER: TDA7340P
detector and different mute functions. The use of BICMOS technology allows the implementation of several filter functions with switched capacitor techniques like fully integrated, adjustment free PLL Loop filter, pilot detector with integrator and two 19KHz notch filters. This minimizes the number of external components. Due to a highly linear signal processing, using CMOS-switching techniques instead of standard bipolar multipliers, very low distortion and very low noise are obtained also in the stereodecoder part. The audioprocessor contains several new features like softmute, zero-crossing mute and pause detector. Very low Dc stepping is obtained by use of a BICMOS technology.
September 1999
1/16
TDA7340
AUDIO PROCESSOR PART FEATURES: Input Multiplexer: DIFFERENTIAL CD STEREO INPUT CASSETTE STEREO INPUT FM STEREO INPUT FROM STEREODECODER AM INPUT: MONO OR STEREO MODE (PROGRAMMABLE) BEEP INPUT (ONLY IN AM MONO MODE) TELEPHONE DIFFERENTIAL MONO INPUT GAIN PROGRAMMABLE IN 3 x 3.75dB STEPS Loudness: FULLY PROGRAMMABLE 15 x 1.25dB STEPS Volume Control: 1.25dB COARSE ATTENUATOR 0.31dB FINE ATTENUATORS MAX GAIN 20dB MAX ATTENUATION 59.7dB (PLUS LOUDNESS) Bass Control 7 x 2dB STEPS 2nd ORDER SYMMETRICAL OR NON SYMMETRICAL FREQUENCY RESPONSE (PROGRAMMABLE) Treble Control 7 x 2dB STEPS Speaker Control 4 INDEPENDENT SPEAKER CONTROL IN 1.25dB STEPS CONTROL RANGE 37.5dB INDEPENDENT SPEAKER MUTE Mute Functions DIRECT MUTE ZERO CROSSING MUTE WITH PROGRAMMABLE THRESHOLD SOFT MUTE WITH EXTERNAL DEFINED SLOPE Pause Detector PROGRAMMABLE THRESHOLD DELAY TIME DEFINED BY AN EXTERNAL CAPACITOR STEREO DECODER PART FEATURES: INTEGRATED 19KHZ NOTCH FILTER FOR PILOT CANCELLATION ON CHIP FILTER FOR PILOT DETECTOR AND PLL ADJUSTMENT FREE VOLTAGE CONTROLLED OSCILLATOR AUTOMATIC PILOT DEPENDENT MONO/STEREO SWITCHING VERY HIGH INTERMODULATION AND INTERFERENCE SUPPRESSION 2 I C BUS CONTROLLED (STD OFF, FORCED MONO, STEREO) HIGH CUT CONTROL STEREO BLEND NOISE BLANKER PART FEATURES: INTERNAL 2nd ORDER HIGH-PASS FILTER NOISE RECTIFIER OUTPUT FOR SIGNAL QUALITY DETECTION PROGRAMMABLE TRIGGER THRESHOLD TRIGGER THRESHOLD DEPENDENT ON HIGH FREQUENCY NOISE BLANKING TIME PROGRAMMABLE BY EXTERNAL CAPACITOR VERY LOW OFFSET CURRENT DURING HOLD TIME DUE TO OPAMPS WITH MOS INPUTS LEVEL INPUT FOR ADDITIONAL SPIKE DETECTION ON FIELD STRENGTH
2/16
1F C2
CD 47nF C4 IN R IN L BIN L BOUT L BIN R LOUD L LOUD R CSM BOUT R TR L TR R OUT LR MUTE VOLUME + LOUDNESS BASS TREBLE SOFT MUTE OUT LF OUT RR OUT RF 47nF C5 47nF C6 C7 C9 C10 C11 2.7nF 2.7nF C12
BLOCK DIAGRAM
6.2K R1 4x 100nF C8
6.2K R2
OUT R
CD L+
CD R+
OUT L
4x 4.7F 1F C3
6x 1F
OUT LR OUT LF OUT RR OUT RF SCL SDA DIGGND
AM_R
(AM MONO) AM_L (BEEP) CASS R PAUSE I2C BUS
CASS L
MUX
PHONE IN FM R FM L
PHONE GND
VCO PLL 456KHz DEMODULATOR 19KHz NOTCH 25KHz LP NOISE BLANKER
HC L 1nF C13 HIGH CUT CONTROL HC R 1nF C14 HP LEVEL CONTROL PULSE FORMER
MPX
80KHz LP
1F
SUPPLY
PEAK DETECTOR
TDA7340
CREF C1 47nF C15 field strength PAUSE LEVEL PEAK 47nF C16 TBLANK 470pF C17 100K R3 VSB VR 68K 47K R4 (*) reflevel level R5 VHCC
D93AU046B
VDD
GND
47K R6
(**) NETWORK TO BE ADAPTED TO THE SPECIFIC REQUESTS FOR STEREO BLEND AND HIGH CUT CONTROL
TDA7340
3/16
TDA7340
ABSOLUTE MAXIMUM RATINGS
Symbol VS Tamb Tstg Operating Supply Voltage Operating Temperature Range Storage Temperature Range Parameter Value 10.5 -40 to 85 -55 to 150 Unit V C C
PIN CONNECTION
AM_R (AM MONO)
AM_L (BEEP)
BOUT R
CASS R
BOUT L
CASS L
OUT R
BIN R
BIN L
44 43 42 41 40 39 38 37 36 35 34 OUT L IN L CREF LOUD L LOUD R GND DIGGND VDD CSM SCL SDA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 PAUSE VCO TBLANK LEVEL VHCC PEAK MPX HCR VSB HCL VR 33 32 31 30 TR L CD L+ CD LCD RCD R+ PHON IN PHON GND OUT LF OUT RF OUT LR OUT RR
TR R 29 28 27 26 25 24 23
D94AU055A
IN R
TDA7340P (PQFP44)
THERMAL DATA
Symbol Rth j-pins Parameter Thermal Resistance Junction-pins Value max 85 Unit C/W
ELECTRICAL CHARACTERISTICS (VS = 9V; Tamb = 25C; RL = 10K; all gains = 0dB; f = 1KHz; unless otherwise specified, refer to the Test Circuit.)
Symbol Parameter Supply Voltage Supply Current Ripple Rejection Test Condition Min. 6 10 5 Typ. 9 20 12.5 90 55 100 2.6 100 0 11.25 3.75 2.3 2 3 Max. 10 25 20 Unit V mA mA dB dB K Vrms dB K dB dB dB V mV mV
SUPPLY
VS IS SVR Stereo Decoder = ON Stereo Decoder = OFF Audioprocessor Stereo Decoder + Audioprocessor
INPUT SECTION
RI VCL SI RL GI MIN GI MAX GSTEP eIN VDC Input Resistance Clipping Level Input Separation Output Load Resistance Minimum Input Gain Max Input Gain Step Resolution Input Noise Dc Steps d 0.3% 70 2.1 80 2 -0.75 10.25 2.75 130
0.75 12.25 4.75 10
Single Ended Input Adjacent Gain Step GMIN to GMAX
4/16
TDA7340
ELECTRICAL CHARACTERISTICS (continued.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
DIFFERENTIAL CD STEREO INPUT
RI CMRR d eIN GDIFF Input Resistance Common Mode Rejection Ratio Distortion Input Noise Differential Gain Input selector BIT D6 = 0 (0dB) Input selector BIT D6 = 1(-6dB) VCM = 1VRMS ; f = 1KHz f = 10KHz VI = 1VRMS 20Hz to 20KHz; Flat; D6 = 0 D6 = 0 D6 = 1 -1 -7 10 14 48 45 15 20 75 70 0.01 5 0 -6 20 30 K K dB dB % V dB dB
0.08 1 -5
DIFFERENTIAL TELEPHONE MONO INPUT
RI CMRR d eIN GDIFF Input Resistance Common Mode Rejection Ratio Distortion Input Noise Differential Gain VCM = 1VRMS ; f = 1KHz VI = 1VRMS 20Hz to 3 KHz; Flat -4.75 14 45 20 60 0.15 10 -3.75 26 0.5 -2.75 K dB % V dB
VOLUME CONTROL
RI C MAX AMAX ASTEPC ASTEPF EA ET VDC Input Resistance (INR, INL) Max Gain Max Attenuation Step Resolution Coarse Attenuation Step Resolution Fine Attenuation Attenuation Set Error Tracking Error DC Steps Adjacent Attenuation Steps from 0dB to AMAX -3 0.1 0.5 24 18.75 57.7 0.50 0.11 G = -20 to 20dB G = -20 to -59.7dB -1.25 3 35 20 59.7 1.25 0.31 0 46 21.25 62.7 2.00 0.51 1.25 2 2 3 5 K dB dB dB dB dB dB dB mV mV
LOUDNESS CONTROL (LOUDL, LOUDR)
RI ASTEP AMAX Internal Resistance Step Resolution Max Attenuation 35 0.5 17.5 50 1.25 18.75 65 2.0 20.0 K dB dB
ZERO CROSSING MUTE
VTH Zero Crossing Threshold (1) WIN = 11 WIN = 10 WIN = 01 WIN = 00 AMUTE VDC Mute Attenuation DC Step 80 0dB to Mute 20 40 80 160 100 0.3 mV mV mV mV dB mV
3
SOFT MUTE
AMUTE tD Mute Attenuation Delay Time CEXT = 22nF; 0 to -20dB; I = IMAX I = IMIN 45 0.8 15 60 1.5 25 2.0 45 dB ms ms
(1) WIN represents the MUTE programming bit pair D6,D5 for the zero crossing window threshold
5/16
TDA7340
ELECTRICAL CHARACTERISTICS (continued.)
Symbol Parameter Test Condition Min. 11.5 1 35 13 1 Typ. 14 2 50 14 2 Max. 16 3 65 15 3 Unit
BASS CONTROL
C RANGE ASTEP RB Control Range Step Resolution Internal Feedback Resistance dB dB K
TREBLE CONTROL
CRANGE ASTEP Control Range Step Resolution dB dB
SPEAKER ATTENUATORS
CRANGE ASTEP AMUTE EA VDC Control Range Step Resolution Output Mute Attenuation Attenuation Set Error DC Step Adjacent Attenuation Steps 0.1 Data Word = 38.75dB 35.0 0.5 80 37.5 1.25 100 1.50 3 40.0 2.0 dB dB dB dB mV
AUDIO OUTPUTS
VCLIP RL ROUT VDC Clipping Level Output Load Resistance Output Impedance DC Voltage Level 3.5 d = 0.3% 2.1 2 30 3.8 100 4.1 2.6 VRMS K V
PAUSE DETECTOR
VTH Zero Crossing Threshold (1) WIN = 11 WIN = 10 WIN = 01 WIN = 00 IDELAY VTHP Pull-up Current Pause Threshold 15 20 40 80 160 25 3.0 35 mV mV mV mV A V
GENERAL
ENO Output Noise BW = 20Hz to 20KHz, flat Output Muted All gains = 0dB All gains 0dB; VO = 1VRMS ; VI = 1VRMS ; 80 AV = 0 to -20dB; AV = -20 to -60dB; 2.5 5 106 0.01 100 0 0 1 2 0.08 15 V V dB % dB dB dB
S/N d SC ET
Signal to Noise Ratio Distortion Channel Separation Left/Right Total Tracking Error
BUS INPUT
V IL VIH IIN VO Input Low Voltage Input High Voltage Input Current Output Voltage SDA Acknowledge VIN = 0.4V IO = 1.6mA 3 -5 0.4 5 0.8 1 V V A V
(1) WIN represent the MUTE programming bit paIr D6,D5 for the zero crossing window threshold
6/16
TDA7340
STEREO DECODER PART ELECTRICAL CHARACTERISTICS (VS = 9V; modulation frequency: 1KHz; de-emphasis time: T = 50s; nominal MPX input voltage: VMPX = 0.5VRMS (75KHz deviation); GI = 3.5dB; T amb = 27C; unless otherwise specified)
Symbol VIN R IN GMIN GMAX GSTEP SVRR VO THD Parameter MPX Input Level Input Resistance Minimum Input Gain Maximum Input Gain Step Resolution Supply Voltage Ripple Rejection DC Output Voltage (HCL, HCR) Channel Separation Total Harmonic distortion Signal plus noise to noise ratio Test Condition Min. 35 2.5 9.5 1.75 50 4.2 Typ. 0.5 50 3.5 11 2.5 60 4.5 50 0.02 91 Max. 1.25 65 4.5 12.5 3.25 4.8 0.2 Unit VRMS K dB dB dB dB V dB % dB
VRIPPLE = 100mV; f = 1KHz VSB - VR = 100mVDC f = 200Hz to 16KHz; S = 2VRMS
S+N N
19 38 57 76 2 3 57 67 114 190 VINTH VINTH
CARRIER AND HARMONIC SUPPRESSION AT THE OUTPUT
Pilot Signal f = 19KHz Subcarrier f = 38KHz Subcarrier f = 57KHz Subcarrier f = 76KHz 55 75 75 62 90 dB dB dB dB
INTERMODULATION (note 1)
fmod = 10KHz; fspur = 1KHz fmod = 13KHz; fspur = 1KHz Signal f = 57KHz 65 75 dB dB
TRAFFIC RADIO (note 2)
70 dB
SCA - SUBSIDIARY COMMUNICATIONS AUTHORIZATION (note 3)
Signal f = 67KHz 75 dB
ACI - ADJACENT CHANNEL INTERFERENCE (note4)
Signal f = 114KHz Signal f = 190KHz 95 84 dB dB
MONO/ STEREO SWITCH
Pilot Threshold Voltage Pilot Threshold Voltage for stereo "ON" Pth = 1 Pth = 0 for stereo "OFF" Pth = 1 Pth = 0 = 6dB; VR = 3.6V (note 5) = 26dB; 11 18 6 13 15 25 12 19 22 34 18 25 mVRMS mVRMS mVRMS mVRMS V mV
STEREO BLEND
VSB-VR VSB-VR Control Voltage for Channel Separation Control Voltage for Channel Separation -0.31 -0.26 -50 -0.23
HIGH CUT CONTROL
deemp R HCC R HCC De-Emphasis Time Constant High Cut Control Resistance High Cut Control Resistance C13, C14 = 1nF; V HCC-VR = 100mV VHCC-VR = 100mV VHCC-VR = -1.3V (note 6) 50 50 150 s K K
115
185
VCO
fOSC f/f Oscillator Frequency Capture and Holding Range 456 1 7/16
TDA7340
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
NOISE INTERFERENCE DETECTOR
V TR Trigger Threshold (1) (see pulse slope fig 3) meas. with VRECT = 1.2V meas. with VRECT = 1.4V VRECT Rectifier Voltage VMPXIN = 0mV VMPXIN = 50mV;f = 150KHz VMPXIN = 100mV; f = 150KHz TS IOS Suppression Pulse Duration Input Offset Current During Suppression Time CBLANK = 470pF NTB = 00 NTB = 10 NTB = 11 NTB = 00 NTB = 10 NTB = 11 0.5 2.0 100 130 170 150 200 250 0.9 1.5 2.5 40 10 1.3 3.0 mVP mVP mVP mVP mVP mVP V V V s pA
(1) NTB represent the STDEC programming bit pair D6, D5 for the noise blanker trigger threshold
NOTES TO THE CHARACTERISTICS 1 INTERMODULATION SUPPRESSION 2 = 3 = VO (signal) (at1KHz) ; fs = (2 x 10KHz) - 19KHz VO (spurious) (at1KHZ) VO (signal) (at1KHz) ; fs = (3 x 13KHz) - 38KHz VO (spurious) (at1KHZ)
measured with : 91% mono signal; 9% pilot signal; fm=10KHz or 13KHz 2. TRAFFIC RADIO (V.F.) suppression 57 (V.W.F.) = VO(signal) (at1KHz) VO (spurious) (at1KHZ 23Hz)
measured with : 91% stereo signal; 9% pilot signal; fm=1KHz; 5% subcarrier (f=57KHz, fm = 23Hz AM, m = 60%) 3. SCA (SUBSIDIARY COMMUNICATIONS AUTHORIZATION) 67 = VO(signal) (at1KHz) ; fs = (2 x 38KHz) - 67KHz VO (spurious) (at9KHZ)
measured with : 81% mono signal; 9% pilot signal; fm=1KHz; 10% SCA - subcarrier (fs = 67KHz, unmodulated) 4. ACI (ADJACENT CHANNEL INTERFERENCE) 114 = 190 = VO (signal) (at1KHz) ; fs = 110KHz - (3 x 38KHz) VO (spurious) (at4KHZ) VO (signal) (at1KHz) ; fs = 186KHz - (5 x 38KHz) VO (spurious) (at4KHZ)
measured with : 90% mono signal; 9% pilot signal; fm=1KHz; 1% spurious signal (fs = 110KHz or 186KHz, unmodulated)
8/16
TDA7340
NOTES TO THE CHARACTERISTICS (continued) 5. Control range typ 11% of VR (see figure 2) 6. Control range typ 30% of VR (see figure 1) Figure 1: High Cut Control Figure 2: Stereo Blend
SEP (dB) 50 VR=3.6V 40 30 20 10 0 -0.4 -0.3 -0.2 -0.1 VSB-VR(V)
D94AU056
Figure 3
VMPX VTH
(*) All thresholds are measured by using a pulse with TR = 2s, THIGH = 2s and TF = 10s. The repetition rate must not increase the PEAK voltage.
DC-LEVEL
D94AU185
Time TR T HIGH TF
I2C BUS INTERFACE Interface Protocol The interface protocol comprises: A start condition (s) A chip address byte, (the LSB bit determines read/write transmission).
CHIP ADDRESS MSB S 1 0 0 0 1 0 0 LSB R/W ACK MSB X X T I SUBADDRESS
A subaddress byte A sequence of data (N-bytes + acknowledge) A stop condition (P)
DATA 1 ... DATA n LSB MSB ACK DATA LSB ACK P
A3 A2 A1 A0
D95AU216
ACK = Acknowledge S = Start P = Stop I = Autoincrement MAX CLOCK SPEED 500kbits/s Autoincrement If bit I in the subaddress byte is set to "1", the autoincrement of subaddress is enabled.
9/16
TDA7340
SUBADDRESS (RECEIVE MODE)
MSB X X T I A3 0 0 0 0 0 0 0 0 1 1 A2 0 0 0 0 1 1 1 1 0 0 A1 0 0 1 1 0 0 1 1 0 0 LSB A0 0 1 0 1 0 1 0 1 0 1 Input Selector Loudness Volume Bass, Treble Speaker Attenuator LF Speaker Attenuator LR Speaker Attenuator RF Speaker Attenuator RR Mute Stereodecoder FUNCTION
T = Testmode
I = Autoincrement X = Not Used ST = Stereo (HIGH = active) X = Not used The transmitted data is automatically updated after each 9th clock pulse. Transmission can be repeated without new chipaddress.
TRANSMITTED DATA (SEND MODE)
MSB X X X X ST SM ZM LSB P
P = Pause (low active) ZM =Zero Crossing Muted (HIGH = active) SM = Soft mute activated (HIGH = active) DATA BYTE SPECIFICATION X = not relevant; set to "1"during testing INPUT SELECTOR
MSB D7 0 1 D6 D5 D4 D3 D2 0 0 0 0 1 1 0 0 0 1 1 0 1 1 1 0 0 1 1 0 1 0 1 0 1 D1 0 0 0 1 1 0 0 1 0 1 1
LSB D0 0 0 1 0 1 0 1 1 1 0 1 Quasi Diff CD Full Diff CD Stereo Decoder Cassette Stereo AM Mono Telephone Mono Beep Mono AM Stereo Not allowed Not allowed Not allowed 11.25dB gain 7.5dB Gain 3.75dB Gain 0 dB Gain
FUNCTION
0dB Differential input Gain (CD Input) -6dB Differential input Gain (CD Input)
For example to select quasi diff CD input with 0dB diff gain and 7.5dB input gain the Data Byte is: 00001000
10/16
TDA7340
LOUDNESS
MSB D7 X X X X X X X X X X X X X X X X X D6 X X X X X X X X X X X X X X X X X D5 X X X X X X X X X X X X X X X X X D4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D3 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D2 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D1 LSB D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D0 0dB -1.25dB -2.5dB -3.75dB -5dB -6.25dB -7.5dB -8.75dB -10dB -11.25dB -12.5dB -13.75dB -15dB -16.25dB -17.5dB -18.75dB loudness OFF (1) LOUDNESS
For example to select -17.5dB loudness the Data Byte is: XXX01110
Note (1): If the loudness is switched OFF, the loudness stage is acting like a volume attenuator with flat frequency response. D0 to D3 determine the attenuation level.
MUTE
MSB D7 D6 D5 D4 D3 D2 D1 0 1 1 0 0 1 0 0 1 1 0 1 0 1 0 1 1 0 LSB D0 1 1 1 Soft Mute On Soft Mute with fast slope (I = IMAX) Soft Mute with slow slope (I = IMIN) Direct Mute Zero Crossing Mute ON ZC Mute OFF (delayed until next zero crossing) Zero Crossing Mute and Pause Detector Reset 160mV ZC Window Threshold (WIN = 00) 80mV ZC Window Threshold (WIN = 01) 40mV ZC Window Threshold (WIN = 10) 20mV ZC Window Threshold (WIN = 11) Nonsymmetrical Bass Cut Symmetrical Bass Cut FUNCTION
An additional direct mute function is included in the Speaker Attenuators
11/16
TDA7340
SPEAKER ATTENUATORS
MSB D7 1 1 1 1 1 1 1 1 1 1 1 1 1 D6 1 1 1 1 1 1 1 1 1 1 1 1 1 D5 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 1 0 1 0 1 1 1 1 1 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 SPEAKER ATTENUATORS LF, LR, RF, RR -1.25dB STEPS 0dB -1.25dB -2.5dB -3.75dB -5dB -6.25dB -7.5dB -8.75dB 10dB STEPS 0dB -10dB -20dB -30dB Speaker Mute
For example an attenuationof 25dB on a selected output is given by: 11110100 STEREO DECODER
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 1 1 1 0 1 1 0 1 0 0 1 LSB D0 0 1 0 1 11dB Input Gain 8.5dB Input Gain 6dB Input Gain 3.5dB Input Gain Stereo Decoder Muted Stereo Decoder Off Forced Mono Noise Blanker Threshold 1 (NTB = 00) Noise Blanker Threshold 2 (NTB = 10) Noise Blanker Threshold 3 (NTB = 11) Pilot Threshold High (Pth = 0) Pilot Threshold Low (Pth = 1) FUNCTION
For example pilot threshold low, noise blanker threshold 2 (NTB = 10), Stereo decoder ON, 6dB input gain is given by: 11000010.
12/16
TDA7340
BASS/TREBLE
MSB D7 D6 D5 D4 D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 D2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 D1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 LSB D0 TREBLE STEPS 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB BASS STEPS -14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB FUNCTION
For example12dB TREBLE and -8dB BASS give the following Data Byte : 00111001
13/16
TDA7340
VOLUME
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 LSB D0 0 1 0 1 0 -0.31dB -0.62dB -0.94dB 1.25dB COARSE ATTENUATION STEPS 0dB -1.25dB -2.5dB -3.75dB -5dB -6.25dB -7.5dB -8.75dB 10dB GAIN ATTENUATION STEPS 20dB 10dB 0dB -10dB -20dB -30dB -40dB -50dB FUNCTION 0.31dB FINE ATTENUATION STEPS
For example to select -47.81dB Volume the Data Byte is: 11011001 STATUS AFTER POWER ON RESET
VOLUME BASS, TREBLE SPKRS LF, RF, LR, RR LOUDNESS INPUT STEREODEC MUTE -59.69dB Treble = +2dB, Bass = 0dB, symmetrical -37.5dB OFF, -17.5dB No input selected, GAIN = 0dB, DIFF CD GAIN = -06dB, FULLY DIFF MODE OFF, FORCED MONO, 6dB GAIN, PILOT THRESHOLD LOW, NOISE BLANKER =11 DIRECTLY MUTED, SOFT OFF, ZEROCROSS RESET, WINDOW THRESHOLD =11
14/16
TDA7340
DIM. MIN. A A1 A2 B c D D1 D3 e E E1 E3 L L1 K 0.65 12.95 9.90 0.25 1.95 0.30 0.13 12.95 9.90 13.20 10.00 8.00 0.80 13.20 10.00 8.00 0.80 1.60 0(min.), 7(max.) 0.95 0.026 13.45 10.10 0.510 0.390 2.00 2.10 0.45 0.23 13.45 10.10 mm TYP. MAX. 2.45 0.010 0.077 0.012 0.005 0.51 0.390 0.52 0.394 0.315 0.031 0.520 0.394 0.315 0.031 0.063 0.037 0.530 0.398 0.079 0.083 0.018 0.009 0.53 0.398 MIN. inch TYP. MAX. 0.096
OUTLINE AND MECHANICAL DATA
PQFP44 (10 x 10)
D D1 D3 A1
33 34 23 22
0.10mm .004 Seating Plane
A A2
E3
E1
B
44 1 11
12
E
B
e
L1 L
C
K
PQFP44
15/16
TDA7340
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com
16/16

▲Up To Search▲

Price & Availability of TDA7340

	To Download TDA7340 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .