INTEGRATED CIRCUITS DATA SHEET TEA6321 Sound fader control circuit Preliminary specification Supersedes data of August 1993 File under Integrated Circuits, IC01 1995 Dec 19 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 FEATURES • Source selector for four stereo and one mono inputs • Interface for noise reduction circuits • Interface for external equalizer • Volume, balance and fader control • Special loudness characteristic automatically controlled in combination with volume setting GENERAL DESCRIPTION The sound fader control circuit TEA6321 is an I2C-bus controlled stereo preamplifier for car radio hi-fi sound applications. • Bass control with equalizer filters • Treble control • Mute control at audio signal zero crossing • Fast mute control via I2C-bus • Fast mute control via pin • I2C-bus control for all functions • Power supply with internal power-on reset. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VCC supply voltage ICC supply current VCC = 8.5 V Vo(rms) maximum output voltage level VCC = 8.5 V; THD ≤ 0.1% − 2000 − mV Gv voltage gain −86 − +20 dB Gstep(vol) step resolution (volume) − 1 − dB Gbass bass control −18 − +18 dB Gtreble treble control −12 − +12 dB Gstep(treble) step resolution (treble) − 1.5 − dB (S+N)/N signal-plus-noise to noise ratio Vo = 2.0 V; Gv = 0 dB; unweighted − 105 − dB RR100 ripple rejection Vr(rms) < 200 mV; f = 100 Hz; Gv = 0 dB − 75 − dB αcs channel separation 250 Hz ≤ f ≤ 10 kHz; Gv = 0 dB 90 96 − dB 7.5 8.5 9.5 V − 26 − mA ORDERING INFORMATION TYPE NUMBER TEA6321T 1995 Dec 19 PACKAGE NAME SO32 DESCRIPTION plastic small outline package; 32 leads; body width 7.5 mm 2 VERSION SOT287-1 Vref VCC 10 8 150 nF 270 nF 270 nF 7 9 Cm 5.6 nF MUTE 5 6 12 21 31 MUTE FUNCTION ZERO CROSS DETECTOR POWER SUPPLY 2 GND 10 nF VOLUME I +20 to −31 dB LOUDNESS LEFT 47 µF 19 BASS LEFT TREBLE LEFT ±18 dB ±12 dB VOLUME II 0 to −55 dB BALANCE FADER REAR 3 output left VOLUME II 0 to −55 dB BALANCE FADER FRONT 9 x 220 nF Philips Semiconductors 100 µF 3.4 k Ω Sound fader control circuit 20 kΩ CKVL 220 nF 2.2 kΩ BLOCK DIAGRAM 1995 Dec 19 8.2 nF 4 16 32 15 I2C-BUS RECEIVER LOGIC 13 1 SCL SDA 11 SOURCE input mono source 14 SELECTOR VOLUME I +20 to −31 dB LOUDNESS RIGHT 22 BASS RIGHT TREBLE RIGHT ±18 dB ±12 dB VOLUME II 0 to −55 dB BALANCE FADER FRONT input right source 18 TEA6321 17 CKIN 23 25 24 26 27 29 output right 20 VOLUME II 0 to −55 dB BALANCE FADER REAR 30 28 270 nF 2.2 kΩ 3.4 k Ω 8.2 nF 20 kΩ Fig.1 Block diagram. 5.6 nF TEA6321 150 nF 270 nF Preliminary specification MED838 CKVL 220 nF handbook, full pagewidth 3 input left source Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 PINNING SYMBOL PIN DESCRIPTION SDA 1 serial data input/output GND 2 ground OUTLR 3 output left rear OUTLF 4 output left front TL 5 treble control capacitor left channel or input from an external equalizer handbook, halfpage SDA 1 32 SCL GND 2 31 VCC OUTLR 3 30 OUTRR OUTLF 4 29 OUTRF TL 5 28 TR B2L 6 bass control left channel or output to an external equalizer B1L 7 bass control, left channel IVL 8 input volume I, left control part ILL 9 input loudness, left control part QSL 10 output source selector, left channel B2L 6 27 B2R IDL 11 input D left source B1L 7 26 B1R MUTE 12 mute control IVL 8 ICL 13 input C left source IMO 14 input mono source IBL 15 input B left source IAL 16 input A left source IAR 17 input A right source IBR 18 CAP 19 25 IVR TEA6321 ILL 9 24 ILR QSL 10 23 QSR IDL 11 22 IDR MUTE 12 21 Vref input B right source ICL 13 20 ICR electronic filtering for supply IMO 14 19 CAP ICR 20 input C right source IBL 15 18 IBR Vref 21 reference voltage (0.5VCC) IAL 16 17 IAR IDR 22 input D right source QSR 23 output source selector right channel ILR 24 input loudness right channel IVR 25 input volume I, right control part B1R 26 bass control right channel B2R 27 bass control right channel or output to an external equalizer TR 28 treble control capacitor right channel or input from an external equalizer OUTRF 29 output right front OUTRR 30 output right rear VCC 31 supply voltage SCL 32 serial clock input 1995 Dec 19 MED839 Fig.2 Pin configuration. 4 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 disconnected. The connections B2L and B2R are outputs and TL and TR are inputs for inserting an external equalizer. FUNCTIONAL DESCRIPTION The source selector selects one of 4 stereo inputs or the mono input. The maximum input signal voltage is Vi(rms) = 2 V. The outputs of the source selector and the inputs of the following volume control parts are available at pins 8 and 10 for the left channel and pins 23 and 25 for the right channel. This offers the possibility of interfacing a noise reduction system. The last section of the circuit is the volume II block. The balance and fader functions are performed using the same control blocks. This is realized by 4 independently controllable attenuators, one for each output. The control range of these attenuators is 55 dB in steps of 1 dB with an additional mute step. The volume control function is split into two sections: volume I control block and volume II control block. The circuit provides 3 mute modes: 1. Zero crossing mode mute via I2C-bus using 2 independent zero crossing detectors (ZCM, see Tables 2 and 9 and Fig.16). The control range of volume I is between +20 dB and −31 dB in steps of 1 dB. The volume II control range is between 0 dB and −55 dB in steps of 1 dB. Although the theoretical possible control range is 106 dB (+20 to −86 dB), in practice a range of 86 dB (+20 to −66 dB) is recommended. The gain/attenuation setting of the volume I control block is common for both channels. 2. Fast mute via MUTE pin (see Fig.10). 3. Fast mute via I2C-bus either by general mute (GMU, see Tables 2 and 9) or volume II block setting (see Table 4). The mute function is performed immediately if ZCM is cleared (ZCM = 0). If the bit is set (ZCM = 1) the mute is activated after changing the GMU bit. The actual mute switching is delayed until the next zero crossing of the audio frequency signal. As the two audio channels (left and right) are independent, two comparators are built-in to control independent mute switches. The volume I control block operates in combination with the loudness control. The filter is linear when the maximum gain for the volume I control (+20 dB) is selected. The filter characteristic increases automatically over a range of 32 dB down to a setting of −12 dB. That means the maximum filter characteristic is obtained at −12 dB setting of volume I. Further reduction of the volume does not further influence the filter characteristic (see Fig.5). The maximum selected filter characteristic is determined by external components. The proposed application gives a maximum boost of 17 dB for bass and 4.5 dB for treble. The loudness may be switched on or off via I2C-bus control (see Table 7). To avoid a large delay of mute switching when very low frequencies are processed, the maximum delay time is limited to typically 100 ms by an integrated timing circuit and an external capacitor (Cm = 10 nF, see Fig.10). This timing circuit is triggered by reception of a new data word for the switch function which includes the GMU bit. After a discharge and charge period of an external capacitor the muting switch follows the GMU bit if no zero crossing was detected during that time. The volume I control block is followed by the bass control block. An external filter for each channel in combination with internal resistors, provides the frequency response of the bass control (see Fig.3). The adjustable range is between −18 and +18 dB in steps of 1.8 dB at 46 Hz. The mute function can also be controlled externally. If the mute pin is switched to ground all outputs are muted immediately (hardware mute). This mute request overwrites all mute controls via the I2C-bus for the time the pin is held LOW. The hardware mute position is not stored in the TEA6321. Both loudness and bass control result in a maximum bass boost of 35 dB for low volume settings. The treble control block offers a control range between −12 and +12 dB in steps of 1.5 dB at 15 kHz. The filter characteristic is determined by a single capacitor of 5.6 nF for each channel in combination with internal resistors (see Fig.4). For the turn on/off behaviour the following explanation is generally valid. To avoid AF output caused by the input signal coming from preceding stages, which produces output during drop of VCC, the mute has to be set before the VCC will drop. This can be achieved by I2C-bus control or by grounding the MUTE pin. The basic step width of treble control is 3 dB. The intermediate steps are obtained by switching 1.5 dB boost and 1.5 dB attenuation steps. For use where is no mute in the application before turn off, a supply voltage drop of more than 1 × VBE will result in a mute during the voltage drop. The bass and treble control functions can be switched off via I2C-bus. In this event the internal signal flow is 1995 Dec 19 5 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 The hardware mute function is favourable for use in Radio Data System (RDS) applications. The zero crossing mute avoids modulation plops. This feature is an advantage for mute during changing presets and/or sources (e.g. traffic announcement during cassette playback). The power supply should include a VCC buffer capacitor, which provides a discharging time constant. If the input signal does not disappear after turn off the input will become audible after certain time. A 4.7 kΩ resistor discharges the VCC buffer capacitor, because the internal current of the IC does not discharge it completely. LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VCC supply voltage 0 10 V Vn voltage at pins 1 and 3 to 32 to pin 2 0 VCC V Tamb operating ambient temperature −40 +85 °C Tstg storage temperature −65 +150 °C Ves electrostatic handling note 1 Note 1. Human body model: C = 100 pF; R = 1.5 kΩ; V ≥ 2 kV. Charge device model: C = 200 pF; R = 0 Ω; V ≥ 500 V. 1995 Dec 19 6 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 CHARACTERISTICS VCC = 8.5 V; RS = 600 Ω; RL = 10 kΩ; CL = 2.5 nF; AC coupled; f = 1 kHz; Tamb = 25 °C; gain control Gv = 0 dB; bass linear; treble linear; fader off; balance in mid position; loudness off; unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT VCC supply voltage 7.5 8.5 9.5 V ICC supply current − 26 33 mA VDC internal DC voltage at inputs and outputs 3.83 4.25 4.68 V Vref internal reference voltage at pin 21 Gv(max) maximum voltage gain Vo(rms) output voltage level for − 4.25 − V RS = 0 Ω; RL = ∞ 19 20 21 dB Pmax at the power output stage THD ≤ 0.1%; see Fig.11 − 2000 − mV start of clipping THD = 1% 2300 − − mV RL = 2 kΩ; CL = 10 nF; THD = 1% 2000 − − mV − 200 − mV low frequency (−1 dB) 60 − − Hz low frequency (−3 dB) 30 − − Hz high frequency (−1 dB) 20000 − − Hz Vi(rms) input sensitivity Vo = 2000 mV; Gv = 20 dB fro roll-off frequency CKIN = 220 nF; CKVL = 220 nF; Zi = Zi(min) CKIN = 470 nF; CKVL = 100 nF; Zi = Zi(typ) low frequency (−3 dB) 17 − − Hz 90 96 − dB Vi = 100 mV; Gv = 20 dB − 0.1 − % αcs channel separation Vi = 2 V; frequency range 250 Hz to 10 kHz THD total harmonic distortion frequency range 20 Hz to 12.5 kHz RR (S+N)/N ripple rejection signal-plus-noise to noise ratio Vi = 1 V; Gv = 0 dB − 0.05 0.15 % Vi = 2 V; Gv = 0 dB − 0.1 − % Vi = 2 V; Gv = −10 dB − 0.1 − % f = 100 Hz 70 76 − dB f = 40 Hz to 12.5 kHz − 66 − dB − 105 − dB Gv = 0 dB − 95 − dB Gv = 12 dB − 88 − dB Gv = 20 dB − 81 − dB Vr(rms) < 200 mV unweighted; 20 Hz to 20 kHz RMS; Vo = 2.0 V; see Figs 6 and 7 CCIR468-2 weighted; quasi peak; Vo = 2.0 V 1995 Dec 19 7 Philips Semiconductors Preliminary specification Sound fader control circuit SYMBOL TEA6321 PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Pno(rms) noise output power (RMS value) only contribution of TEA6321; power amplifier for 6 W mute position; note 1 − − 10 nW αct crosstalk V bus ( p – p ) 20 log -------------------------- between bus V o ( rms ) note 2 − 110 − dB 25 35 45 kΩ inputs and signal outputs Source selector Zi input impedance αS input isolation of one selected source to any other input f = 1 kHz − 105 − dB f = 12.5 kHz − 95 − dB Vi(rms) maximum input voltage (RMS value) THD < 0.5%; VCC = 8.5 V − 2.15 − V THD < 0.5%; VCC = 7.5 V − 1.8 − V Voffset DC offset voltage at source selector output by selection of any inputs − − 10 mV Zo output impedance − 80 120 Ω RL output load resistance 10 − − kΩ CL output load capacity 0 − 2500 pF Gv voltage gain, source selector − 0 − dB Control part (source selector disconnected; source resistance 600 Ω) Zi input impedance volume input 100 150 200 kΩ input impedance loudness input 25 33 40 kΩ Zo output impedance − 80 120 Ω RL output load resistance 2 − − kΩ CL output load capacity 0 − 10 nF RDCL DC load resistance at output to ground 4.7 − − kΩ Vi(rms) maximum input voltage (RMS value) THD < 0.5% − 2.15 − V Vno noise output voltage CCIR468-2 weighted; quasi peak Gv = 20 dB − 110 220 µV Gv = 0 dB − 33 50 µV Gv = −66 dB − 13 22 µV mute position − 10 − µV total continuous control range − 106 − dB recommended control range − 86 − dB step resolution − 1 − dB step error between any adjoining step − − 0.5 dB CRtot Gstep 1995 Dec 19 8 Philips Semiconductors Preliminary specification Sound fader control circuit SYMBOL TEA6321 PARAMETER ∆Ga attenuator set error ∆Gt gain tracking error MUTEatt Voffset CONDITIONS MIN. TYP. MAX. UNIT Gv = +20 to −50 dB − − 2 dB Gv = −51 to −66 dB − − 3 dB Gv = +20 to −50 dB − − 2 dB mute attenuation see Fig.10 100 110 − dB DC step offset between any adjoining step Gv = 0 to −66 dB − 0.2 10 mV Gv = 20 to 0 dB − 2 15 mV − − 10 mV DC step offset between any step to Gv = 0 to −66 dB mute Volume I control and loudness CRvol continuous volume control range − 51 − dB Gv voltage gain −31 − +20 dB Gstep step resolution − 1 − dB LBmax maximum loudness boost f = 40 Hz − 17 − dB f = 10 kHz − 4.5 − dB 16 18 19 dB loudness on; referred to loudness off; boost is determined by external components Bass control Gbass Gstep Voffset bass control, maximum boost f = 46 Hz maximum attenuation f = 46 Hz 16 18 19 dB step resolution (toggle switching) f = 46 Hz − 1.8 − dB step error between any adjoining step f = 46 Hz − − 0.5 dB − − 20 mV 11 12 13 dB DC step offset in any bass position Treble control Gtreble Gstep Voffset treble control, maximum boost f = 15 kHz maximum attenuation f = 15 kHz 11 12 13 dB maximum boost f > 15 kHz − − 15 dB step resolution (toggle switching) f = 15 kHz − 1.5 − dB step error between any adjoining step f = 15 kHz − − 0.5 dB − − 10 mV DC step offset in any treble position Volume II, balance and fader control CR continuous attenuation fader and volume control range 53.5 55 56.5 dB Gstep step resolution − 1 2 dB attenuation set error − − 1.5 dB 1995 Dec 19 9 Philips Semiconductors Preliminary specification Sound fader control circuit SYMBOL TEA6321 PARAMETER CONDITIONS MIN. TYP. MAX. UNIT Mute function (see Fig.10) HARDWARE MUTE mute switch level (2 × VBE) − 1.45 − V VswLOW input level − − 1.0 V Ii input current −300 − − µA Vsw mute active VswLOW = 1 V mute passive: level internally defined VswHIGH saturation voltage − − VCC V td(mute) delay until mute passive − − 0.5 ms ZERO CROSSING MUTE Id discharge current 0.3 0.6 1.2 µA Ich charge current −300 −150 − µA VswDEL delay switch level (3 × VBE) − 2.2 − V td delay time − 100 − ms Vwind window for audio signal zero crossing detection − 30 40 mV − V19 − 0.7 − V Cm = 10 nF Muting at power supply drop VCCdrop supply drop for mute active Power-on reset (when reset is active the GMU-bit (general mute) is set and the I2C-bus receiver is in reset position) VCC increasing supply voltage start of reset − − 2.5 V end of reset 5.2 6.5 7.2 V decreasing supply voltage start of reset 4.2 5.5 6.2 V Digital part (I2C-bus pins); note 3 ViH HIGH level input voltage 3 − 9.5 V ViL LOW level input voltage −0.3 − +1.5 V IiH HIGH level input current −10 − +10 µA IiL LOW level input current −10 − +10 µA VoL LOW level output voltage − − 0.4 V IL = 3 mA Notes to the characteristics 1. The indicated values for output power assume a 6 W power amplifier at 4 Ω with 20 dB gain and a fixed attenuator of 12 dB in front of it. Signal-to-noise ratios exclude noise contribution of the power amplifier. 2. The transmission contains: total initialization with MAD and subaddress for volume and 8 data words, see also definition of characteristics, clock frequency = 50 kHz, repetition burst rate = 400 Hz, maximum bus signal amplitude = 5 V (p-p). 3. The AC characteristics are in accordance with the I2C-bus specification. This specification, “The I2C-bus and how to use it”, can be ordered using the code 9398 393 40011. 1995 Dec 19 10 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 I2C-BUS PROTOCOL I2C-bus format S(1) SLAVE ADDRESS(2) A(3) SUBADDRESS(4) A(3) DATA(5) A(3) P(6) Notes 1. S = START condition. 2. SLAVE ADDRESS (MAD) = 1000 0000. 3. A = acknowledge, generated by the slave. 4. SUBADDRESS (SAD), see Table 1. 5. DATA, see Table 1. 6. P = STOP condition. Table 1 Second byte after MAD. MSB FUNCTION LSB BIT 7 6 5 4 3 2(1) 1(1) 0(1) Volume/loudness V 0 0 0 0 0 0 0 0 Fader front right FFR 0 0 0 0 0 0 0 1 Fader front left FFL 0 0 0 0 0 0 1 0 Fader rear right FRR 0 0 0 0 0 0 1 1 Fader rear left FRL 0 0 0 0 0 1 0 0 Bass BA 0 0 0 0 0 1 0 1 Treble TR 0 0 0 0 0 1 1 0 Switch S 0 0 0 0 0 1 1 1 Note 1. Significant subaddress. 1995 Dec 19 11 Philips Semiconductors Preliminary specification Sound fader control circuit Table 2 TEA6321 Definition of third byte after MAD and SAD MSB FUNCTION LSB BIT 7 6 5 4 3 2 1 0 ZCM(1) LOFF(2) V5(3) V4(3) V3(3) V2(3) V1(3) V0(3) Volume/loudness V Fader front right FFR X(4) X(4) FFR5(5) FFR4(5) FFR3(5) FFR2(5) FFR1(5) FFR0(5) Fader front left FFL X(4) X(4) FFL5(6) FFL4(6) FFL3(6) FFL2(6) FFL1(6) FFL0(6) Fader rear right FRR X(4) X(4) FRR5(7) FRR4(7) FRR3(7) FRR2(7) FRR1(7) FRR0(7) Fader rear left FRL X(4) X(4) FRL5(8) FRL4(8) FRL3(8) FRL2(8) FRL1(8) FRL0(8) Bass BA X(4) X(4) X(4) BA4(9) BA3(9) BA2(9) BA1(9) BA0(9) Treble TR X(4) X(4) X(4) TR4(10) TR3(10) TR2(10) TR1(10) TR0(10) Switch S GMU(11) X(4) X(4) X(4) X(4) SC2(12) SC1(12) SC0(12) Notes 1. Zero crossing mode. 2. Switch loudness on/off. 3. Volume control. 4. Don’t care bits (logic 1 during testing). 5. Fader control front right. 6. Fader control front left. 7. Fader control rear right. 8. Fader control rear left. 9. Bass control. 10. Treble control. 11. Mute control for all outputs except the outputs OVL and OVR (general mute). 12. Source selector control. 1995 Dec 19 12 Philips Semiconductors Preliminary specification Sound fader control circuit Table 3 TEA6321 Volume I setting Gv (dB) DATA V5 V4 V3 V2 V1 V0 Loudness on: the increment of the loudness characteristics is linear at every volume step in the range from +20 to −11 dB +20 1 1 1 1 1 1 +19 1 1 1 1 1 0 +18 1 1 1 1 0 1 +17 1 1 1 1 0 0 +16 1 1 1 0 1 1 +15 1 1 1 0 1 0 +14 1 1 1 0 0 1 +13 1 1 1 0 0 0 +12 1 1 0 1 1 1 +11 1 1 0 1 1 0 +10 1 1 0 1 0 1 +9 1 1 0 1 0 0 +8 1 1 0 0 1 1 +7 1 1 0 0 1 0 +6 1 1 0 0 0 1 +5 1 1 0 0 0 0 +4 1 0 1 1 1 1 +3 1 0 1 1 1 0 +2 1 0 1 1 0 1 +1 1 0 1 1 0 0 0 1 0 1 0 1 1 −1 1 0 1 0 1 0 −2 1 0 1 0 0 1 −3 1 0 1 0 0 0 −4 1 0 0 1 1 1 −5 1 0 0 1 1 0 −6 1 0 0 1 0 1 −7 1 0 0 1 0 0 −8 1 0 0 0 1 1 −9 1 0 0 0 1 0 −10 1 0 0 0 0 1 −11 1 0 0 0 0 0 1995 Dec 19 13 Philips Semiconductors Preliminary specification Sound fader control circuit Gv (dB) TEA6321 DATA V5 V4 V3 V2 V1 V0 Loudness characteristic is constant in a range from −11 dB to −31 dB −12 0 1 1 1 1 1 −13 0 1 1 1 1 0 −14 0 1 1 1 0 1 −15 0 1 1 1 0 0 −16 0 1 1 0 1 1 −17 0 1 1 0 1 0 −18 0 1 1 0 0 1 −19 0 1 1 0 0 0 −20 0 1 0 1 1 1 −21 0 1 0 1 1 0 −22 0 1 0 1 0 1 −23 0 1 0 1 0 0 −24 0 1 0 0 1 1 −25 0 1 0 0 1 0 −26 0 1 0 0 0 1 −27 0 1 0 0 0 0 −28 0 0 1 1 1 1 −29 0 0 1 1 1 0 −30 0 0 1 1 0 1 −31 0 0 1 1 0 0 Repetition of steps in a range from −28 dB to −31 dB −28 0 0 1 0 1 1 −29 0 0 1 0 1 0 −30 0 0 1 0 0 1 −31 0 0 1 0 0 0 −28 0 0 0 1 1 1 −29 0 0 0 1 1 0 −30 0 0 0 1 0 1 −31 0 0 0 1 0 0 −28 0 0 0 0 1 1 −29 0 0 0 0 1 0 −30 0 0 0 0 0 1 −31 0 0 0 0 0 0 1995 Dec 19 14 Philips Semiconductors Preliminary specification Sound fader control circuit Table 4 TEA6321 Volume II setting (fader and balance); note 1 DATA FRR5 FRR4 FRR3 FRR2 FRR1 FRR0 FRL5 FRL4 FRL3 FRL2 FRL1 FRL0 FFL5 FFL4 FFL3 FFL2 FFL1 FFL0 FFR5 FFR4 FFR3 FFR2 FFR1 FFR0 0 1 1 1 1 1 1 −1 1 1 1 1 1 0 −2 1 1 1 1 0 1 −3 1 1 1 1 0 0 −4 1 1 1 0 1 1 −5 1 1 1 0 1 0 −6 1 1 1 0 0 1 −7 1 1 1 0 0 0 −8 1 1 0 1 1 1 Gv (dB) −9 1 1 0 1 1 0 −10 1 1 0 1 0 1 −11 1 1 0 1 0 0 −12 1 1 0 0 1 1 −13 1 1 0 0 1 0 −14 1 1 0 0 0 1 −15 1 1 0 0 0 0 −16 1 0 1 1 1 1 −17 1 0 1 1 1 0 −18 1 0 1 1 0 1 −19 1 0 1 1 0 0 −20 1 0 1 0 1 1 −21 1 0 1 0 1 0 −22 1 0 1 0 0 1 −23 1 0 1 0 0 0 −24 1 0 0 1 1 1 −25 1 0 0 1 1 0 −26 1 0 0 1 0 1 −27 1 0 0 1 0 0 −28 1 0 0 0 1 1 −29 1 0 0 0 1 0 −30 1 0 0 0 0 1 −31 1 0 0 0 0 0 −32 0 1 1 1 1 1 −33 0 1 1 1 1 0 −34 0 1 1 1 0 1 1995 Dec 19 15 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 DATA FRR5 FRR4 FRR3 FRR2 FRR1 FRR0 FRL5 FRL4 FRL3 FRL2 FRL1 FRL0 FFL5 FFL4 FFL3 FFL2 FFL1 FFL0 FFR5 FFR4 FFR3 FFR2 FFR1 FFR0 −35 0 1 1 1 0 0 −36 0 1 1 0 1 1 −37 0 1 1 0 1 0 −38 0 1 1 0 0 1 −39 0 1 1 0 0 0 −40 0 1 0 1 1 1 −41 0 1 0 1 1 0 −42 0 1 0 1 0 1 −43 0 1 0 1 0 0 −44 0 1 0 0 1 1 −45 0 1 0 0 1 0 −46 0 1 0 0 0 1 −47 0 1 0 0 0 0 −48 0 0 1 1 1 1 −49 0 0 1 1 1 0 −50 0 0 1 1 0 1 −51 0 0 1 1 0 0 −52 0 0 1 0 1 1 −53 0 0 1 0 1 0 −54 0 0 1 0 0 1 Gv (dB) −55 0 0 1 0 0 0 mute 0 0 0 1 1 1 mute 0 0 0 1 1 0 mute 0 0 0 1 0 1 mute 0 0 0 1 0 0 mute 0 0 0 0 1 1 mute 0 0 0 0 1 0 mute 0 0 0 0 0 1 mute 0 0 0 0 0 0 Note 1. For a particular range the data is always the same, only the subaddress changes. 1995 Dec 19 16 Philips Semiconductors Preliminary specification Sound fader control circuit Table 5 TEA6321 Bass setting DATA Gbass (dB) BA4 BA3 BA2 BA1 BA0 +18.0 1 1 1 1 1 +16.2 1 1 1 1 0 +18.0 1 1 1 0 1 +16.2 1 1 1 0 0 +18.0 1 1 0 1 1 +16.2 1 1 0 1 0 +14.4 1 1 0 0 1 +12.6 1 1 0 0 0 +10.8 1 0 1 1 1 +9.0 1 0 1 1 0 +7.2 1 0 1 0 1 +5.4 1 0 1 0 0 +3.6 1 0 0 1 1 +1.8 1 0 0 1 0 0(1) 1 0 0 0 1 0(2) 1 0 0 0 0 −1.8 0 1 1 1 1 −3.6 0 1 1 1 0 −5.4 0 1 1 0 1 −7.2 0 1 1 0 0 −9.0 0 1 0 1 1 −10.8 0 1 0 1 0 −12.6 0 1 0 0 1 −14.4 0 1 0 0 0 −16.2 0 0 1 1 1 −18.0 0 0 1 1 0 −16.2 0 0 1 0 1 −18.0 0 0 1 0 0 note 3 0 0 0 1 1 note 3 0 0 0 1 0 note 3 0 0 0 0 1 notes 3 and 4 0 0 0 0 0 Notes 1. Recommended data word for step 0 dB. 2. Result of 1.8 dB boost and 1.8 dB attenuation. 3. The last four bass control data words mute the bass response. 4. The last bass control and treble control data words (00000) enable the external equalizer connection. 1995 Dec 19 17 Philips Semiconductors Preliminary specification Sound fader control circuit Table 6 TEA6321 Treble setting DATA Gtreble (dB) TR4 TR3 TR2 TR1 TR0 +12.0 1 1 1 1 1 +10.5 1 1 1 1 0 +12.0 1 1 1 0 1 +10.5 1 1 1 0 0 +12.0 1 1 0 1 1 +10.5 1 1 0 1 0 +12.0 1 1 0 0 1 +10.5 1 1 0 0 0 +9.0 1 0 1 1 1 +7.5 1 0 1 1 0 +6.0 1 0 1 0 1 +4.5 1 0 1 0 0 +3.0 1 0 0 1 1 +1.5 1 0 0 1 0 0(1) 1 0 0 0 1 0(2) 1 0 0 0 0 −1.5 0 1 1 1 1 −3.0 0 1 1 1 0 −4.5 0 1 1 0 1 −6.0 0 1 1 0 0 −7.5 0 1 0 1 1 −9.0 0 1 0 1 0 −10.5 0 1 0 0 1 −12.0 0 1 0 0 0 note 3 0 0 1 1 1 note 3 0 0 1 1 0 note 3 0 0 1 0 1 note 3 0 0 1 0 0 note 3 0 0 0 1 1 note 3 0 0 0 1 0 note 3 0 0 0 0 1 notes 3 and 4 0 0 0 0 0 Notes 1. Recommended data word for step 0 dB. 2. Result of 1.5 dB boost and 1.5 dB attenuation. 3. The last eight treble control data words select treble output. 4. The last treble control and bass control data words (00000) enable the external equalizer connection. 1995 Dec 19 18 Philips Semiconductors Preliminary specification Sound fader control circuit Table 7 TEA6321 Loudness setting Table 9 CHARACTERISTIC DATA LOFF With loudness 0 Linear 1 Table 8 Mute mode DATA FUNCTION Selected input DATA FUNCTION SC2 SC1 SC0 Stereo inputs IAL and IAR 1 1 1 Stereo inputs IBL and IBR 1 1 0 Stereo inputs ICL and ICR 1 0 1 Stereo inputs IDL and IDR 1 0 0 Mono input IMO 0 X(1) X(1) GMU ZCM Direct mute off 0 0 Mute off delayed until the next zero crossing 0 1 Direct mute 1 0 Mute delayed until the next zero crossing 1 1 Note 1. X = don’t care bits (logic 1 during testing). MED840 20 handbook, full pagewidth Gbass (dB) 10 0 −10 −20 10 10 2 10 3 Fig.3 Bass control. 1995 Dec 19 19 f (Hz) 10 4 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 MED424 15 handbook, full pagewidth Gtreble (dB) 10 5 0 −5 −10 −15 10 2 10 3 10 4 f (Hz) 10 5 Fig.4 Treble control. MED425 handbook,20 full pagewidth Gv (dB) 10 0 −10 −20 −30 −40 10 10 2 10 3 10 4 Fig.5 Volume control with loudness (including low roll-off frequency). 1995 Dec 19 20 f (Hz) 10 5 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 MED426 100 handbook, full pagewidth S/N (dB) (1) 90 (2) (3) 80 70 60 50 10 −4 10 −3 10 −2 10 −1 Po (W) 1 10 (1) Vi = 2.0 V. (2) Vi = 0.5 V. (3) Vi = 0.2 V. Fig.6 Signal-to-noise ratio; noise weighted: CCIR468-2, quasi peak. MED427 110 handbook, full pagewidth S/N (dB) (1) 100 (2) 90 (3) 80 70 60 10 −4 10 −3 10 −2 10 −1 (1) Unweighted RMS. (2) CCIR468-2 RMS. (3) CCIR468-2 quasi peak. Fig.7 Signal-to-noise ratio; Vi = 2 V; Pmax = 6 W. 1995 Dec 19 21 1 Po (W) 10 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 MED428 200 handbook, full pagewidth noise (µV) 150 100 (1) 50 (2) 0 −70 −50 −30 −10 10 gain (dB) 30 Stereo/mono inputs. (1) Loudness on. (2) Loudness off. Fig.8 Noise output voltage; CCIR468-2, quasi peak. MED429 −60 handbook, full pagewidth (dB) −80 −100 −120 −140 20 50 10 2 200 500 10 3 Fig.9 Muting. 1995 Dec 19 22 2 x 10 3 5 x 10 3 10 4 2 x 10 4 f (Hz) Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 mute pin 12 handbook, full pagewidth hardware mute switch ICH = −150 µA TEA6321 U (V) ID = 0.6 µA Cm = 10 nF I (µA) 0.5 ms delay until mute passive VCC 8.5 0 delay switch (1) 2.2 level −150 mute switch 1.45 level MED841 100 ms zero crossing mute start end of delay t (ms) hard mute on hard mute off (1) Typically 2.2 V; referenced to 3 × VBE Fig.10 Mute function diagram. 1995 Dec 19 23 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 If the 20 dB gain is not required for the maximum volume position, it will be an advantage to use the maximum boost gain and then increased attenuation in the last section, Volume II. Therefore the loudness will be at the correct place and a lower noise and offset voltage will be achieved. POWER STAGE handbook, halfpage TEA6321 G = 20 dB VI(min) = 200 mV Vo = 2 V for P(max) P(max) = 100 W at 4 Ω MBE910 a. POWER STAGE handbook, halfpage TEA6321 G = 26 dB VI(min) = 200 mV Vo = 1 V for P(max) P(max) = 100 W at 4 Ω MED842 b. a. Gain volume I = 20 dB (Gv(max)); gain volume II = 0 dB; fader and balance range = 55 dB. b. Gain volume I = 20 dB (Gv(max)); gain volume II = −6 dB global setting; fader and balance range now 49 dB, previously 55 dB. Fig.11 Level diagram. 1995 Dec 19 24 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 handbook, full pagewidth VP +8.5 V to oscilloscope + VCC 8.5 V 470 µF 4.7 kΩ inputs 31 16 15 13 11 14 17 18 20 22 3 4 TEA6321 outputs to oscilloscope 29 30 2 9 × 220 nF 19 21 47 µF 9 × 600 Ω 4 × 4.7 µF 100 µF 4 × 10 kΩ MED843 Fig.12 Turn-on/off power supply circuit diagram. MED433 10 handbook, full pagewidth (V) 8 (1) 6 4 (2) 2 0 0 1 2 3 (1) VCC. (2) VO. Fig.13 Turn-on/off behaviour. 1995 Dec 19 25 4 t (s) 5 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 handbook, full pagewidth 3.4 k Ω 220 nF 270 nF 270 nF 5.6 nF 10 nF 100 µF 21 10 VCC = 8.5 V 7 8 6 5 12 31 0.1 µF 10 kΩ 32 SCL 1 SDA 2 TEA6321 1000 µF 19 VP 47 µF 0.2 V (RMS) 600 Ω 220 nF output right output left front and rear input A to D left and right and input mono 23 26 25 220 nF 27 270 nF 4.7 µF VO 28 MED844 5.6 nF 270 nF 3.4 k Ω Fig.14 Test circuit for power supply ripple rejection (RR). handbook, full pagewidth 220 nF 3.4 k Ω 270 nF 5.6 nF 270 nF 10 nF 100 µF 21 10 VCC = 8.5 V 8 7 6 5 12 31 0.1 µF 470 µF 32 SCL 1 SDA 2 TEA6321 Vp 19 47 µF input A to D right and left 220 nF Vi 600 Ω 220 nF output left output right front and rear input A to D left and right and input mono 23 25 220 nF 26 270 nF 27 270 nF 5.6 nF Fig.15 Test circuit for channel separation (αcs). 26 VO 28 3.4 k Ω 1995 Dec 19 4.7 µF MED845 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 Selection of input signals by using the zero crossing mute mode follows the input A signal, until the next zero crossing occurs and then activates mute. A selection from input A (IAL) to input B (IBL) left sources produces a modulation click depending on the difference of the signal values at the time of switching. After a fixed delay time at t2, the microcontroller sends the bits for input switching and mute inactive. The output signal remains muted until the next signal zero crossing of input B (IBL) occurs, and then follows that signal. At t1 the maximum possible difference between signals is 7 V(p-p) (see Fig.16) and gives a large click. Using the cross detector no modulation click is audible. The delay time t2 − t1 is e.g. 40 ms. Therefore the capacity Cm = 3.3 nF. The zero cross function is working at the lowest frequency of 40 Hz determined by the Cm capacitor. For example: The selection is enabled at t1, the microcontroller sets the zero cross bit (ZCM = 1) and then the mute bit (GMU = 1) via the I2C-bus. The output signal handbook, full pagewidth MED436 V 4 (1) 3 2 1 0 −1 (2) t1 t t2 (3) −2 −3 −4 (1) Input A (IAL). (2) Output. (3) Input B (IBL). Fig.16 Zero cross function; only one channel shown. 1995 Dec 19 27 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 Loudness filter calculation example Figure 17 shows the basic loudness circuit with an external low-pass filter application. R1 allows an attenuation range of 21 dB while the boost is determined by the gain stage V2. Both result in a loudness control range of +20 to −12 dB. handbook, halfpage CKVL Defining fref as the frequency where the level does not change while switching loudness on/off. The external resistor R3 for fref → ∞ can be calculated as: 0 dB 8 V1 R1 33 kΩ V2 9 C1 Gv ------20 10 R3 = R1 -------------------- . With Gv = −21 dB and R1 = 33 kΩ, G R2 R3 v ------20 MED437 1 – 10 R3 = 3.2 kΩ is generated. For the low-pass filter characteristic the value of the external capacitor C1 can be determined by setting a specific boost for a defined frequency and referring the gain to Gv at fref as indicated above. Fig.17 Basic loudness circuit. Gv ------20 ( R1 + R3 ) × 10 – R3 1 --------------------- = ------------------------------------------------------------Gv j ( ωC1 ) ------20 1 – 10 handbook, halfpage 220 nF For example: 3 dB boost at f = 1 kHz Gv = Gv(ref) + 3 dB = −18 dB; f = 1 kHz and C1 = 100 nF. 0 dB 8 8.2 nF If a loudness characteristic with additional high frequency boost is desired, an additional high-pass section has to be included in the external filter circuit as indicated in the block diagram. A filter configuration that provides AC coupling avoids offset voltage problems. 20 kΩ V1 R1 33 kΩ 9 V2 150 nF R2 2.2 kΩ Figure 18 shows an example of the loudness circuit with bass and treble boost. The calculation of this network is numeric. MED846 Fig.18 Loudness circuit with bass and treble boost. 1995 Dec 19 28 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 INTERNAL PIN CONFIGURATIONS Values shown in Figs 19 to 31 are typical DC values; VCC = 8.5 V. 3 + 4.25 V 1 5V 1.8 kΩ 80 Ω MBE911 MBE912 Fig.19 Pin 1: SDA (I2C-bus data). Fig.20 Pins 3, 4, 29, 30: output signals. + 5 + 4.25 V 6 4.25 V + 80 Ω 2.4 kΩ MBE913 MBE914 Fig.21 Pins 5 and 28: treble control capacitors. 1995 Dec 19 Fig.22 Pins 6 and 27: bass control capacitor outputs. 29 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 7 4.25 V 8 + 3.52 kΩ 4.25 V + 150 kΩ 4.25 V MED847 MBE915 Fig.23 Pins 7 and 26: bass control capacitor inputs. Fig.24 Pins 8 and 25: input volume 1, control part. + 9 10 4.25 V 4.25 V + 80 Ω 1.12 kΩ MBE905 MBE906 Fig.25 Pins 9 and 24: input loudness, control part. 1995 Dec 19 Fig.26 Pins 10 and 23: output source selector. 30 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 12 11 4.25 V 1.3 kΩ + 8.5 V constant 2.2 V + maximum 200µA 35 kΩ 0.6 µA constant 4.25 V 4.5 kΩ MBE907 MBE908 Fig.27 Pins 11, 13 to 18, 20, 22: inputs. Fig.28 Pin 12: mute control. + 19 4.7 kΩ 8.5 V 300 Ω + 3.4 kΩ 5 kΩ 4.25 V 21 3.4 kΩ MED439 Fig.29 Pin 19: filtering for supply; pin 21: reference voltage. 31 32 apply +8.5 V to this pin 5V MED440 MBE909 Fig.31 Pin 32: SCL (I2C-bus clock). Fig.30 Pin 31: supply voltage. 1995 Dec 19 1.8 kΩ 31 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 PACKAGE OUTLINE SO32: plastic small outline package; 32 leads; body width 7.5 mm SOT287-1 D E A X c y HE v M A Z 17 32 Q A2 A (A 3) A1 pin 1 index θ Lp L 16 1 0 detail X w M bp e 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) mm 2.65 0.3 0.1 2.45 2.25 0.25 0.49 0.36 0.27 0.18 20.7 20.3 7.6 7.4 1.27 10.65 10.00 1.4 1.1 0.4 1.2 1.0 0.25 0.25 0.1 0.95 0.55 0.01 0.02 0.01 0.011 0.007 0.81 0.80 0.30 0.29 0.419 0.050 0.394 inches 0.10 0.012 0.096 0.004 0.086 0.043 0.055 0.016 0.047 0.039 0.01 0.01 0.037 0.004 0.022 θ 8o 0o Note 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. OUTLINE VERSION REFERENCES IEC JEDEC EIAJ ISSUE DATE 95-01-25 97-05-22 SOT287-1 1995 Dec 19 EUROPEAN PROJECTION 32 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities. In these situations reflow soldering is often used. Maximum permissible solder temperature is 260 °C, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 °C within 6 seconds. Typical dwell time is 4 seconds at 250 °C. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our “IC Package Databook” (order code 9398 652 90011). Repairing soldered joints Fix the component by first soldering two diagonallyopposite end leads. Use only a low voltage soldering iron (less than 24 V) applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 °C. When using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 °C. Reflow soldering Reflow soldering techniques are suitable for all SO packages. Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Several techniques exist for reflowing; for example, thermal conduction by heated belt. Dwell times vary between 50 and 300 seconds depending on heating method. Typical reflow temperatures range from 215 to 250 °C. Preheating is necessary to dry the paste and evaporate the binding agent. Preheating duration: 45 minutes at 45 °C. Wave soldering Wave soldering techniques can be used for all SO packages if the following conditions are observed: • A double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. • The longitudinal axis of the package footprint must be parallel to the solder flow. • The package footprint must incorporate solder thieves at the downstream end. 1995 Dec 19 33 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 DEFINITIONS Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information Where application information is given, it is advisory and does not form part of the specification. LIFE SUPPORT APPLICATIONS These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. PURCHASE OF PHILIPS I2C COMPONENTS Purchase of Philips I2C components conveys a license under the Philips’ I2C patent to use the components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011. 1995 Dec 19 34 Philips Semiconductors Preliminary specification Sound fader control circuit TEA6321 NOTES 1995 Dec 19 35 Philips Semiconductors – a worldwide company Argentina: IEROD, Av. Juramento 1992 - 14.b, (1428) BUENOS AIRES, Tel. (541)786 7633, Fax. (541)786 9367 Australia: 34 Waterloo Road, NORTH RYDE, NSW 2113, Tel. (02)805 4455, Fax. (02)805 4466 Austria: Triester Str. 64, A-1101 WIEN, P.O. Box 213, Tel. (01)60 101-1236, Fax. (01)60 101-1211 Belgium: Postbus 90050, 5600 PB EINDHOVEN, The Netherlands, Tel. (31)40-2783749, Fax. (31)40-2788399 Brazil: Rua do Rocio 220 - 5th floor, Suite 51, CEP: 04552-903-SÃO PAULO-SP, Brazil, P.O. Box 7383 (01064-970), Tel. (011)821-2333, Fax. 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(02)92 0601 Internet: http://www.semiconductors.philips.com/ps/ For all other countries apply to: Philips Semiconductors, International Marketing and Sales, Building BE-p, P.O. Box 218, 5600 MD EINDHOVEN, The Netherlands, Telex 35000 phtcnl, Fax. +31-40-2724825 SCDS47 © Philips Electronics N.V. 1995 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands 513061/1100/02/pp36 Document order number: Date of release: 1995 Dec 19 9397 750 00534