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d a t a sh eet product speci?cation supersedes data of 1995 aug 02 file under integrated circuits, ic01 1995 nov 15 integrated circuits TDA1548T bitstream continuous calibration filter-dac with headphone driver and dsp
1995 nov 15 2 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T featuresproduct specification easy application only first-order analog post-filtering required headphone amplifiers and digital filter integrated component saving common headphone output selectable system clock (sysclk) 64f s , 256f s or 384f s 16, 18 or 20 bits i 2 s-bus or lsb justified serial input format input pins suitable with 5 v low supply voltage interfacing small package (ssop28) single rail supply (3 v). high performance superior signal-to-noise ratio wide dynamic range continuous calibration digital-to-analog conversion combined with noise shaping technique. features low power dissipation digital volume control soft mute digital tone control (bass boost and treble) digital de-emphasis analog control of digital sound control functions. general description the TDA1548T is a dual cmos digital-to-analog converter (dac) with up-sampling filter and noise shaper and integrated headphone driver featuring unique signal processing functions. the digital processing features are of high sound processing quality due to the wide dynamic range of the bitstream conversion technique. the TDA1548T supports the i 2 s-bus data input mode with word lengths of up to 20 bits and the lsb justified serial data input format with word lengths of 16, 18 or 20 bits. the clock system is selectable (64f s , 256f s or 384f s ) by means of selection pins. two cascaded half band filters, linear interpolator and a sample-and-hold function increase the oversampling rate from 1f s to 64f s . a second-order noise shaper converts this oversampled data into a bitstream for the 5-bit continuous calibration dacs. on board amplifiers convert the output current to a voltage signal capable of driving a headphone or line output. the common operational amplifier application eliminates the need for capacitors. the TDA1548T has some sound processing functions which are controllable by a potentiometer. these functions are volume, bass boost and treble. the flat/min/max switch can also be controlled by a potentiometer. the analog values are converted to a digital code, which is then further translated internally to a set of coefficients for either volume, bass boost or treble. ordering information type number package name description version TDA1548T so28 plastic small outline package; 28 leads; body width 7.5 mm sot136-1 TDA1548Tz ssop28 plastic shrink small outline package; 28 leads; body width 5.3 mm sot341-1
1995 nov 15 3 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T quick reference data notes 1. all v dd and v ss pins must be connected to the same supply or ground respectively. 2. measured at input code 00000h and v dd =3v. symbol parameter conditions min. typ. max. unit v dd supply voltage note 1 2.7 3.0 4.0 v i dd supply current note 2 - 15 - ma v ofs(rms) full-scale output voltage v dd = 3 v 0.57 0.64 0.71 v (thd+n)/s total harmonic distortion plus noise as a function of signal 0 db signal -- 65 - 60 db - 0.056 0.1 % 0 db signal; r ol =5k w- - 85 - 78 db - 0.006 0.013 % - 60 db signal; r ol =32 w or r ol =5k w -- 35 - 30 dba - 1.778 3.162 % s/n signal-to-noise ratio a-weighted; at code 00000h 90 95 - dba br input bit rate at data input f sys = 384f s - 48f s - f sys = 256f s - 64f s - f sys = 64f s - 64f s - f sys system clock frequency 2.048 - 18.432 mhz tc fs full-scale temperature coef?cient at analog outputs (vol and vor) - 100 10 - 6 - t amb operating ambient temperature - 20 - +70 c
1995 nov 15 4 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T block diagram fig.1 block diagram. handbook, full pagewidth 16 (4-bit) calibrated current sources 16 (4-bit) calibrated current sinks left output switches 16 (4-bit) calibrated current sources 16 (4-bit) calibrated current sinks right output switches reference source 2nd order noise shaper data encoder 2nd order noise shaper data encoder 8 x oversampling (sample-and-hold) 8 x oversampling (sample-and-hold) linear interpolator filter stage 2 filter stage 1 sound control serial data input soft mute control volume control - + volume and sound control v dda v dda v ssa v ssa v ssa v ref 10 m f op4 - + op2 - + op3 op1 6 k w 6 k w 1 f s 2 f s 4 f s 8 f s - + timing mute deem ad3s advc adbb adtr ad ref if1 if2 data ws bck 13 12 sysclk clsel 17 5 mode0 mode1 6 11 v ssd v ddd r conv2 10 26 r conv1 1.2 k w 1.2 k w filtcr filtcl vor 1.8 nf cext2 vol 1.8 nf cext1 27 24 mgc668 14 9 8 7 16 15 22 21 20 19 18 TDA1548T 23 2 28 1 25 3 4 v sso v ssa v ddo v dda v com
1995 nov 15 5 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T pinning symbol pin description v sso 1 operational ampli?er ground v com 2 common output pin vol 3 left channel audio voltage output filtcl 4 capacitor for left channel ?rst-order ?lter function should be connected between this pin and vol (pin 3) mode0 5 mode 0 selection pin mode1 6 mode 1 selection pin bck 7 bit clock input ws 8 word select input data 9 data input v ddd 10 digital supply voltage v ssd 11 digital ground sysclk 12 system clock 64f s , 256f s or 384f s if1 13 input format selection 1 if2 14 input format selection 2 deem 15 de-emphasis input (f s = 44.1 khz) (active high) mute 16 soft-mute input (active high) clsel 17 system clock selection input ad ref 18 reference voltage output to external potentiometer adtr 19 analog sense input for treble setting adbb 20 analog sense input for bass boost setting advc 21 analog sense input for volume control setting ad3s 22 3-position switch input for ?at/min/max setting v dda 23 analog supply voltage v ssa 24 analog ground v ref 25 internal reference voltage (0.5v dda typ) filtcr 26 capacitor for right channel ?rst-order ?lter function should be connected between this pin and vor (pin 27) vor 27 right channel audio voltage output v ddo 28 operational ampli?er supply voltage fig.2 pin configuration. handbook, halfpage TDA1548T mgc669 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 v sso v com vol filtcl mode0 mode1 bck ws data v ddd v ssd sysclk if1 if2 v ddo vor filtcr v ref v ssa v dda ad3s advc adbb adtr ad ref clsel mute deem
1995 nov 15 6 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T functional description the TDA1548T cmos dac incorporates an up-sampling digital filter, a linear interpolator, a noise shaper, continuous calibrated current sources and headphone amplifiers. the 1f s input data is increased to an oversampling rate of 64f s . this high-rate oversampling, together with the 5-bit dac, enables the filtering required for waveform smoothing and out-of-band noise reduction to be achieved by simple first-order analog post-filtering. system clock and data input format the TDA1548T accommodates slave mode only, this means that in all applications the system devices must provide the system clock. the system frequency is selectable at pins clsel, mode0 and mode1 (see table 1). the TDA1548T supports the following data input modes (see table 2): i 2 s-bus with data word length of up to 20 bits lsb justified serial format with data word length of 16, 18 or 20 bits. the input formats are illustrated in fig.4. left and right data-channel words are time multiplexed. analog control of digital sound processing features digital sound processing settings are controlled via analog sense inputs that translate an analog voltage from, for example, a potentiometer wiper to a digital code, which is then further translated internally to a set of coefficients for either treble, bass boost or volume. the analog input value is acquired by an internal 6-bit adc, sampling the three input pins advc, adbb and adtr and the three-mode selection pin ads3 (see section single pin three mode selection) in a multiplexed fashion. sampling of the input voltage is performed by a straight forward technique of linear approximation; from the starting value of 0 v, an internal linear approximation voltage is incremented periodically in steps of 1/66th of the scale, with an internal comparator detecting when the approximation value oversteps the input value. tolerance is built in at the top and bottom end of the scale by dimensioning the resistive elements at the top and bottom of the ladder equals 1r. thus the ladder is built up of 64 elements of value r, two of value r, making a typical quantization step size of approximately 1.5 v (ad ref ) divided-by-66 (amount of rs), equals 22.7 mv. for each multiplexed timeslot the full approximation cycle is completed, immediately after which the next input will start being sampled. the time slot for one input lasts 64 steps at a step advance rate of 8 f s , which amounts to 181 m s at f s = 44.1 khz. because four inputs are multiplexed, the sample rate for each analog input is 1.38 khz. a buffered version of an internally generated reference voltage is available at output pin ad ref . because the internal ad derives from the same reference voltage, this allows for optimum mapping of the external analog control value onto the useful ad input voltage range. the idea is to bias a potentiometer to ad ref , using a wiper to control the input voltage between 0 v and ad ref . hysteresis is implemented to improve noise immunity of the ad in order to prevent a stable setting of the potentiometer, to a point near a quantization threshold, from producing two alternating digital codes which could give rise to audible volume or boost changes. an hysteresis of 1 lsb is implemented digital. a shift in code must be at least 2 lsb either up or down from the current value, otherwise the internal digital code will remain at the current value. s ingle pin three mode selection a special input pin ad3s (pin 22), controls the mode in which the sound processing block operates. not between two but three modes; whether the dsp should follow the ad inputs applying maximum effect, the minimum effect or overrule the boost effects thereby resulting in a flat frequency characteristic in the treble and bass boost sections. internally the same ad is used to detect the input level present at this pin as is used for the three sound control pins. an internal bias circuit containing of two mosts supplies a mid-range voltage so that this input can be operated with a minimum of external components. a high or low input level is created by tying the pin to ad ref or ground respectively, the intermediate value is achieved by leaving the pin open-circuit. volume control since there is no headroom included into the sound control section, the volume control precedes the sound control. full volume and neutral setting (flat) of the sound control results in a full-scale output. any tone boost will immediately cause clipping, which can be avoided by reducing the volume setting.
1995 nov 15 7 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T soft mute soft mute is controlled by mute (pin 16). when the input is active high the value of the sample is decreased smoothly to zero following a raised cosine curve. 32 coefficients are used to step down the value of the data, each one being used 32 times before stepping on to the next. this amounts to a mute transition time of 23 ms at f s = 44.1 khz. when mute is released (low), the samples are returned to the full level again following a raised cosine curve with the same coefficients being used in the reverse order. mute is synchronized to the sample clock, so that the operation always takes place on complete samples. digital sound processing features b ass boost a strong bass boost effect, which is useful in compensating for poor bass response of portable headphone sets, is implemented digitally in the TDA1548T and can be controlled by adbb (pin 20) and ad3s (pin 22). table 3 shows the bass boost values at different input voltages. table 4 shows the selection mode status (flat/min/max) at different input voltages. valid settings range from flat (no influence on audio) to +18 db with step sizes of 2 db in minimum and to +24 db with step sizes of 2 db in maximum. the programmable bass boost filter is a second-order shelving type with a fixed corner frequency of 130 hz for the minimum setting and a fixed corner frequency of 230 hz for the maximum setting and has a butterworth characteristic. because of the exceptional amount of programmable gain, bass boost should be used in conjunction with adequate prior attenuation, using the volume control. t reble a treble effect is implemented digitally in the TDA1548T and can be controlled by adtr (pin 19) and ad3s (pin 22). table 3 shows the treble values at different input voltages. table 4 shows the selection mode status (flat/min/max) at different input voltages. valid settings range from flat (no influence on audio) to +6 db with step sizes of 2 db in minimum and to +6 db with a step size of 2 db in maximum. the programmable treble filter is a first-order shelving type with a fixed corner frequency of 2.8 khz for the minimum setting and a fixed corner frequency of 5.0 khz for the maximum setting. d e - emphasis de-emphasis is controlled by deem (pin 15). the digital de-emphasis filter is dimensioned to produce the de-emphasis frequency characteristics for the sample rate 44.1 khz. with its 18-bit dynamic range, the digital de-emphasis of the TDA1548T is a convenient and component-saving alternative to analog de-emphasis. when the deem pin is active high, de-emphasis is enabled. de-emphasis is synchronized to the sample clock, so that operation always takes place on complete samples. oversampling ?lter and noise shaper the digital filter is a four times oversampling filter. it consists of two sections which each increase the sample rate by 2. the second order noise shaper operates at 64f s . it shifts in-band quantization noise to frequencies well above the audio band. this noise shaping technique, used in combination with a sign-magnitude coding, enables high signal-to-noise ratios to be achieved. the noise shaper outputs a 5-bit pdm bitstream signal to the dac. continuous calibration dac the dual 5-bit dac uses the continuous calibration technique. this method, based on charge storage, involves exact duplication of a single reference current source. in the TDA1548T, 32 such current sources plus 1 spare source are continuously calibrated. the spare source is included to allow continuous converter operation. the dac receives a 5-bit data bitstream from the noise shaper. this data is converted to a sign-magnitude code so that no current is switched to the output during digital silence (input 00000h). in this way very high signal-to-noise performance is achieved. component-saving stereo headphone driver high precision, low-noise amplifiers together with the internal conversion resistors r conv1 and r conv2 convert the converter output current to a voltage capable of driving a line output or headphone. the voltage is available at vol and vor (0.64 v rms typical). a major component saving feature of the TDA1548T is that no dc-blocking capacitors are needed in the application, despite the asymmetrical supply. the v com output, pin 2, is biased to the same voltage that the right and left channel voltage outputs are, v ref , and is capable of sinking the sum of left and right channel load currents. therefore, connecting a load between one of the outputs and v com only gives rise to a negligible amount of dc current through the load.
1995 nov 15 8 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T table 1 system clock selection pins description clsel mode0 mode1 0 0 0 256f s 0 0 1 64f s 0 1 x reserved 1 1 0 0 384f s 1 0 1 reserved 2 1 1 x reserved 3 table 2 data input formats pins format if1 if2 00 i 2 s-bus 0 1 lsb justi?ed, 16 bits 1 0 lsb justi?ed, 18 bits 1 1 lsb justi?ed, 20 bits table 3 relationship between vc, bb and tr analog input values (v); pins adtr, adbb and advc volume (advc) bass boost (adbb) treble (adtr) max. min. max. min. ad ref 65/66 - 00000 ad ref 64/66 - 00000 ad ref 63/66 - 10000 ad ref 62/66 - 20002 ad ref 61/66 - 32222 ad ref 60/66 - 42222 ad ref 59/66 - 54422 ad ref 58/66 - 64422 ad ref 57/66 - 76644 ad ref 56/66 - 86644 ad ref 55/66 - 98844 ad ref 54/66 - 10 8 8 4 4 ad ref 53/66 - 11 10 10 6 6 ad ref 52/66 - 12 10 10 6 6 ad ref 51/66 - 13 12 12 6 6 ad ref 50/66 - 14 12 12 6 6 ad ref 49/66 - 15 14 14 .... .... ad ref 48/66 - 16 14 14 .... .... ad ref 47/66 - 17 16 16 .... .... ad ref 46/66 - 18 16 16 .... .... ad ref 45/66 - 19 18 18 .... .... ad ref 44/66 - 20 18 18 .... .... ad ref /4366 - 21 20 18 .... .... ad ref 42/66 - 22 20 18 .... .... ad ref 41/66 - 23 22 .... .... .... ad ref 40/66 - 24 22 .... .... .... ad ref 39/66 - 25 24 .... .... ....
1995 nov 15 9 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T table 4 relationship mode selection ad ref 38/66 - 26 24 .... .... .... ad ref 37/66 - 27 .... .... .... .... ad ref 36/66 - 28 .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... ad ref 5/66 - 59 24 18 6 6 ad ref 4/66 - 60 24 18 6 6 ad ref 3/66 - 24 18 6 6 ad ref 2/66 - 24 18 6 6 analog input value (v); pin ad3s flat, minimum or maximum ad ref 65/66 ?at ad ref 64/66 ?at .... .... .... .... ad ref 51/66 ?at ad ref 50/66 ?at ad ref 49/66 minimum ad ref 48/66 minimum .... .... .... .... ad ref 19/66 minimum ad ref 18/66 minimum ad ref 17/66 maximum ad ref 16/66 maximum .... .... .... .... ad ref 3/66 maximum ad ref 2/66 maximum analog input values (v); pins adtr, adbb and advc volume (advc) bass boost (adbb) treble (adtr) max. min. max. min.
1995 nov 15 10 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T limiting values in accordance with the absolute maximum rating system (iec 134). notes 1. all v dd and v ss connections must be made to the same power supply. 2. equivalent to discharging a 100 pf capacitor via a 1.5 k w series resistor. pin 18 = - 1500 v (min) and +1500 v (max). 3. equivalent to discharging a 200 pf capacitor via a 2.5 m h series inductor. thermal characteristics quality specification in accordance with uzw-bo/fq-0601. the numbers of the quality specification can be found in the quality reference handbook . the handbook can be ordered using the code 9397 750 00192. symbol parameter conditions min. max. unit v dd supply voltage note 1 - 4.5 v t xtal maximum crystal temperature - +150 c t stg storage temperature - 65 +125 c t amb operating ambient temperature - 20 +70 c v es electrostatic handling note 2 - 3000 +3000 v note 3 - 300 +300 v symbol description value unit r th j-a thermal resistance from junction to ambient in free air so28 60 k/w ssop28 80 k/w
1995 nov 15 11 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T dc characteristics all voltages referenced to ground (pins 1, 11 and 24); v ddd =v dda =v ddo =3v; t amb =25 c, r l =32 w (note 1); common operational ampli?er application; unless otherwise speci?ed. notes 1. r l is the ac impedance of the external circuitry connected to the audio outputs of the application circuit. 2. all power supply pins (v dd and v ss ) must be connected to the same external power supply unit. 3. no operational amplifier load resistor. 4. load capacitance greater than 50 pf, an inductor of 22 m h connected in parallel with a resistor of 270 w must be inserted between the load and the operational amplifier output. symbol parameter conditions min. typ. max. unit v ddd digital supply voltage pin 10 note 2 2.7 3.0 4.0 v v dda analog supply voltage pin 23 note 2 2.7 3.0 4.0 v v ddo opamp supply voltage pin 28 note 2 2.7 3.0 4.0 v i ddd digital supply current at digital silence - 4.5 - ma i dda analog supply current at digital silence - 4.5 - ma i ddo opamp supply current at digital silence; note 3 - 6.0 - ma p tot total power dissipation note 3 - 50 - mw digital inputs v ih high level input voltage on pins 5 to 9 and 12 to 17 0.7v ddd -- v v il low level input voltage on pins 5 to 9 and 12 to 17 -- 0.3v ddd v |i li | input leakage current on pins 7 to 9 and 12 to 17 -- 10 m a c i input capacitance on pins 5 to 9 and 12 to 17 -- 10 pf analog inputs pins advc, adbb, adtr and ad3s res input resolution -- 6 bit c i input capacitance - 10 - pf r i input resistance pins adbb, adtr and advc 1 -- m w pin ad3s - 20 - k w analog reference pin ad ref v adref reference voltage pin 18 0.45v dda 0.5v dda 0.55v dda v r l(adref ) reference output load pin 18 3.0 -- k w analog audio pins v ref reference voltage pin 25 with respect to v sso 0.45v dda 0.5v dda 0.55v dda v r o output resistance pin 25 - 3 - k w r conv current-to-voltage conversion resistor - 1.2 - k w i o(max) maximum output current (thd + n)/s < 0.1% - 35 - ma c l output load capacitance note 4 -- 50 pf
1995 nov 15 12 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T ac characteristics (analog) all voltages referenced to ground (pins 2, 9 and 23); v ddd =v dda =v ddo =3v; f i = 1 khz; t amb =25 c, r l =32 w (note 1); common operational ampli?er application; unless otherwise speci?ed. note 1. r l is the ac impedance of the external circuitry connected to the audio outputs of the application circuit. symbol parameter conditions min. typ. max. unit res input resolution -- 18 bit f sad ad sample frequency - f s /32 - khz v adref input voltage range 0 - v adref v v fs(rms) output voltage swing (rms value) (pins 3 and 27) 0.57 0.64 0.71 v v dc(os) dc offset output voltage w.r.t. reference voltage level v ref - 20 - mv tc fs full scale temperature coef?cient - 100 10 - 6 - svrr supply voltage ripple rejection v dda and v ddo c 25 =10 m f; f ripple = 1 khz; v ripple = 100 mv (peak) - 40 - db unbal unbalance between the 2 dac voltage outputs (pins 3 and 27) maximum volume - 0.1 - db a ct crosstalk between the 2 dac voltage outputs (pins 3 and 27) one output digital silence the other maximum volume - 50 - db one output digital silence the other maximum volume r l =5k w - 90 - db crosstalk between the 2 dac voltage outputs (pins 3 and 27) with r l connected to ground one output digital silence the other maximum volume - 70 - db one output digital silence the other maximum volume r l =5k w - 100 - db (thd+n)/s total harmonic distortion plus noise as a function of signal 0 db signal -- 65 - 60 db - 0.056 0.1 % 0 db signal; r l =5k w- - 85 - 78 db - 0.006 0.013 % - 60 db signal; r l =32 w or r l =5k w -- 35 - 30 dba - 1.778 3.162 % s/n signal-to-noise ratio at bipolar zero a-weighted at code 00000h 90 95 - dba
1995 nov 15 13 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T ac characteristics (digital) all voltages referenced to ground (pins 2, 9 and 23); v ddd =v dda =v ddo = 2.7 to 4.0 v; t amb = +70 c, r l =32 w (note 1); unless otherwise speci?ed. symbol parameter conditions min. typ. max. unit t cy clock cycle f sys = 384f s 54.2 59.1 81.3 ns f sys = 256f s 81.3 88.6 122 ns f sys = 64f s 325.5 354.3 488.3 ns t cw(l) f sys low level pulse width 22 -- ns t cw(h) f sys high level pulse width 22 -- ns serial input data timing (see fig.3) br clock input = data input rate f sys = 384f s - 48f s - f sys = 256f s - 64f s - f sys = 64f s - 64f s - f sys system clock frequency 2.048 - 18.432 mhz f ws word select input frequency - 44.1 48.0 khz t r rise time -- 20 ns t f fall time -- 20 ns t bck(h) bit clock high time 55 -- ns t bck(l) bit clock low time 55 -- ns t s;dat data set-up time 20 -- ns t h;dat data hold time 10 -- ns t s;ws word select set-up time 20 -- ns t h;ws word select hold time 10 -- ns fig.3 timing of input signals. handbook, full pagewidth mgc670 t r t bck(h) t bck(l) t h;ws t s;ws t s;dat t h;dat sample out t cy t r ws right left bck data lsb msb
1995 nov 15 14 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T this text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader .this text is here in _ white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader.this text is here in this text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader. white to force land scape pages to be ... handbook, full pagewidth mgc671 16 msb b2 msb msb b2 left lsb justified format 16 bits ws bck data right 15 2 1 16 15 2 1 b15 lsb msb b2 b15 lsb 2 1 > = 8 12 3 left input format i 2 s ws bck data right 3 > = 8 16 b3 b4 left lsb justified format 18 bits ws bck data right 15 18 17 2 1 16 15 18 17 2 1 msb b2 b17 lsb msb b2 b3 b4 msb b2 b17 lsb 16 b5 b6 left lsb justified format 20 bits ws bck data right 15 18 17 20 19 2 1 16 15 18 17 20 19 2 1 b3 b4 msb b2 b19 lsb b5 b6 b3 b4 msb b2 b19 lsb fig.4 data input formats.
1995 nov 15 15 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T test and application information filter characteristics table 5 digital ?lter characteristics (f s = 44.1 khz) the band frequencies scale with the sample frequency. band attenuation 0 to 20 khz < 0.001 db 24 to 64 khz > 39 db 64 to 69 khz > 33 db 69 to 88 khz > 37 db handbook, full pagewidth v ref mute deem ad3s flat mid max advc adbb adtr ad ref if1 if2 data ws bck 13 12 sysclk clsel 17 5 mode0 mode1 6 11 v ssd v ddd 10 26 filtcr filtcl vor vol TDA1548T 27 24 14 9 8 7 16 15 22 21 20 19 18 23 2 28 1 25 3 4 v sso v ssa v ddo v dda v com 1 k w 10 k w 10 k w 330 w 100 w 22 m h 100 m f 47 m f 47 m f 4.7 m f 100 nf 100 nf 100 nf 100 nf 1 nf 100 m f + 3 v + 3 v i 2 s-bus or lsb-justified serial input data system clock input l3 (1) (2) l2 (1) r2 (1) c (1) 1 k w 5 k w c (1) 1 k w 2 k w 5 k w 6 k w c (1) right 330 w 100 w 22 m h 1 nf l1 (1) r1 (1) left mgb709 fig.5 application diagram. (1) optional. (2) chip inductor blm32a07.
1995 nov 15 16 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T package outlines unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p q z y w v q references outline version european projection issue date iec jedec eiaj mm inches 2.65 0.30 0.10 2.45 2.25 0.49 0.36 0.32 0.23 18.1 17.7 7.6 7.4 1.27 10.65 10.00 1.1 1.0 0.9 0.4 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm maximum per side are not included. 1.1 0.4 sot136-1 x 14 28 w m q a a 1 a 2 b p d h e l p q detail x e z c l v m a e 15 1 (a ) 3 a y 0.25 075e06 ms-013ae pin 1 index 0.10 0.012 0.004 0.096 0.089 0.019 0.014 0.013 0.009 0.71 0.69 0.30 0.29 0.050 1.4 0.055 0.419 0.394 0.043 0.039 0.035 0.016 0.01 0.25 0.01 0.004 0.043 0.016 0.01 0 5 10 mm scale so28: plastic small outline package; 28 leads; body width 7.5 mm sot136-1 95-01-24 97-05-22
1995 nov 15 17 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T unit a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p qz y w v q references outline version european projection issue date iec jedec eiaj mm 0.21 0.05 1.80 1.65 0.38 0.25 0.20 0.09 10.4 10.0 5.4 5.2 0.65 1.25 7.9 7.6 0.9 0.7 1.1 0.7 8 0 o o 0.13 0.1 0.2 dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.20 mm maximum per side are not included. 1.03 0.63 sot341-1 mo-150ah 93-09-08 95-02-04 x w m q a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 114 28 15 0.25 y pin 1 index 0 2.5 5 mm scale ssop28: plastic shrink small outline package; 28 leads; body width 5.3 mm sot341-1 a max. 2.0
1995 nov 15 18 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T 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. 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). re?ow soldering reflow soldering techniques are suitable for all so and ssop 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 so 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. ssop wave soldering is not recommended for ssop packages. this is because of the likelihood of solder bridging due to closely-spaced leads and the possibility of incomplete solder penetration in multi-lead devices. if wave soldering cannot be avoided, the following conditions must be 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 and must incorporate solder thieves at the downstream end. even with these conditions, only consider wave soldering ssop packages that have a body width of 4.4 mm, that is ssop16 (sot369-1) or ssop20 (sot266-1) . m ethod (so and ssop) 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. 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. repairing soldered joints fix the component by first soldering two diagonally- opposite 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.
1995 nov 15 19 philips semiconductors product speci?cation bitstream continuous calibration ?lter-dac with headphone driver and dsp TDA1548T definitions 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. data sheet status objective speci?cation this data sheet contains target or goal speci?cations for product development. preliminary speci?cation this data sheet contains preliminary data; supplementary data may be published later. product speci?cation this data sheet contains ?nal product speci?cations. 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 speci?cation 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 speci?cation.
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(63) 2 816 6380, fax. (63) 2 817 3474 portugal: philips portuguesa, s.a., rua dr. antnio loureiro borges 5, arquiparque - miraflores, apartado 300, 2795 linda-a-velha, tel. (01)4163160/4163333, fax. (01)4163174/4163366 singapore: lorong 1, toa payoh, singapore 1231, tel. (65)350 2000, fax. (65)251 6500 south africa: s.a. philips pty ltd., 195-215 main road martindale, 2092 johannesburg, p.o. box 7430, johannesburg 2000, tel. (011)470-5911, fax. (011)470-5494 spain: balmes 22, 08007 barcelona, tel. (03)301 6312, fax. (03)301 42 43 sweden: kottbygatan 7, akalla. s-164 85 stockholm, tel. (0)8-632 2000, fax. (0)8-632 2745 switzerland: allmendstrasse 140, ch-8027 zrich, tel. (01)488 2211, fax. (01)481 77 30 taiwan: philips taiwan ltd., 23-30f, 66, chung hsiao west road, sec. 1. taipeh, taiwan roc, p.o. box 22978, taipei 100, tel. (886) 2 382 4443, fax. (886) 2 382 4444 thailand: philips electronics (thailand) ltd., 209/2 sanpavuth-bangna road prakanong, bangkok 10260, thailand, tel. (66) 2 745-4090, fax. (66) 2 398-0793 turkey: talatpasa cad. no. 5, 80640 gltepe/istanbul, tel. (0 212)279 27 70, fax. (0212)282 67 07 ukraine: philips ukraine, 2a akademika koroleva str., office 165, 252148 kiev, tel. 380-44-4760297, fax. 380-44-4766991 united kingdom: philips semiconductors ltd., 276 bath road, hayes, middlesex ub3 5bx, tel. (0181)730-5000, fax. (0181)754-8421 united states: 811 east arques avenue, sunnyvale, ca 94088-3409, tel. (800)234-7381, fax. (708)296-8556 uruguay: coronel mora 433, montevideo, tel. (02)70-4044, fax. (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 scd45 ? 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

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