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tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 1 - december, 2006 2-channel audio processor ic PT2315A description PT2315A is a two-channel digital audio processor ut ilizing cmos technology. volume, bass, treble and balance controls are incorporated into a single chip. loudness function is also provided to build a highly effective electronic audio processor having t he highest performance and reliability with the least external components. all functions are programmable using the i 2 c bus. the pin assignments and application circuit are optimized for easy pcb lay out and cost saving advantage for audio application. housed in a 20-pin dip and sop, PT2315A is pin-to-p in compatible with tda7315 and is very similar in performance with the later. features ? cmos technology ? least external components ? treble and bass control ? loudness function ? input/output for external noise reduction system/equalizer ? 2 independent speaker controls for balance function ? independent mute function ? volume control in 1.25db/step ? low distortion ? low noise and dc stepping ? controlled by i 2 c bus micro-processor interface ? pin-to-pin compatible with tda7315 applications ? car stereo (audio) ? hi-fi audio system ? can be used in all i2c system applications note: purchase of i 2 c component of princeton technology cor poration (ptc) conveys a license under philips i 2 c patent right to use these components in any i 2 c system, provided that the system conforms to the i 2 c standard specification defined by philips
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 2 - december, 2006 2-channel audio processor ic PT2315A block diagram lin rin supply vo lu me & loudness bass bass treble treble rb rb s er ial b u s d eco de r & la tche s treb_l mute mute speaker att speaker att lout clk rout 2 31 7 15 14 5 11 6 16 18 19 20 17 9 13 12 4 data dgnd treb_r bin_r bout_r loud_r ref agnd vdd vo lu me & loudness loud_l bout_l bin_l
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 3 - december, 2006 2-channel audio processor ic PT2315A pin configuration loud_l nc bin_l bin_r bou t_l rin nc data treb_r agn d clk vd d treb_l ref lout dgnd loud_r bou t_r rout 1 3 2 5 4 8 7 6 10 9 PT2315A lin 20 17 18 19 15 16 13 14 11 12 pin description pin name i/o description pin no. ref - analog reference voltage (1/2 vdd) 1 vdd - supply input voltage 2 agnd - analog ground 3 treb_l i left channel input for treble controller 4 treb_r i right channel input for treble controller 5 rin i audio processor right channel input 6 loud_r i right channel loudness input 7 nc - no connection 8, 10 loud_l i left channel loudness input 9 lin i audio processor left channel input 11 bin_l i left bass controller input channel 12 bout_l o left bass controller output channel 13 bin_r i right channel input for bass controller 14 bout_r o right channel output for bass controller 15 rout o right speaker output 16 lout o left speaker output 17 dgnd - digital ground 18 data i control data input 19 clk i clock input for serial data transmission 20
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 4 - december, 2006 2-channel audio processor ic PT2315A function description i 2 c bus interface data are transmitted to and from the microproce ssor to the PT2315A via the data and clk. the data and clk make up the bus interface. data validity a data on the data line is considered valid and stable only when the clk signal is in high state. the high and low state of the data line can only change when the clk signal is low. please refer to the figure below. data line stable, data valid data change allowed data clk start and stop conditions a start condition is activated when 1) clk is set to high and 2) data shifts from high to low state. the stop condition is activated when 1) clk is set to high and 2) data shifts from low to high state. please refer to the timing diagram below. clk data star t sto p
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 5 - december, 2006 2-channel audio processor ic PT2315A byte format every byte transmitted to the data line consist of 8 bits. each byte must be followed by an acknowledge bit. the msb is transmitted first. acknowledge during the acknowledge clock pulse, the master ( p) puts a resistive high level on the data line. the peripheral (audio processor) that acknowledges has to pull-down (low) the data line during the acknowledge clock pulse so that the data line is in a stable low state during this clock pulse. please refer to the diagram below. clk data start msb 12 34 7 89 acknowledgement from rece iv er the audio processor that has been addressed has to generate an acknowledge after receiving each byte, otherwise, the data line will remain at the high level during the ninth (9 th ) clock pulse. in this case, the master transmitter can generate the stop information in order to abort the transfer. transmission without acknowledge if you want to avoid the acknowledge detec tion of the audio processor, a simpler p transmission may be used. wait one clock and do not c heck the slave acknowledge of this same clock then send the new data. if you use this approach, there are greater c hances of faulty operation as well as decrease in noise immunity. interface protocol the interface protocol consists of the following: ? a start condition ? a chip address byte including the PT2315A address. the 8 th bit of the byte must be ?0?. PT2315A must always acknowledge the end of each transmitted byte. ? a data sequence (n-bytes + acknowledge) ? a stop condition
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 6 - december, 2006 2-channel audio processor ic PT2315A please refer to the diagram below: start ack data ack stop msb msb first byte lsb lsb pt2315 address data transmitted (n-bytes + acknowledge) data ack 1 0 0 0 000 0 msb lsb notes: 1. ack=acknowledge 2. max. clock speed=100k bits/s software specification PT2315A address PT2315A address is shown below. 1 msb 0 0 0 0 0 0 0 lsb data bytes msb lsb function 0 0 b2 b1 b0 a2 a1 a0 volume control 1 0 0 b1 b0 a2 a1 a0 speaker att l 1 0 1 b1 b0 a2 a1 a0 speaker att r 0 1 0 * * l * * loudness control 0 1 1 0 c3 c2 c1 c0 bass control 0 1 1 1 c3 c2 c1 c0 treble control where ax=1.25db steps; bx=10db steps; cx=2db steps; *=no effect
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 7 - december, 2006 2-channel audio processor ic PT2315A i 2 c bus interface start time after power is turned on, PT2315A needs to wait for a short time in order to insure stability. this waiting period is relative to the value of cref. as the cref value is 10f, the waiting time period for PT2315A to send i 2 c bus signal is at least 300ms. if the wa iting time period is less than 300ms, i 2 c control may fail. please refer to the diagram below. at least 300 ms power o n vdd sda/scl v 90% vdd
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 8 - december, 2006 2-channel audio processor ic PT2315A volume the table below gives a detailed description of the volume data bytes. for example, a volume of -37.5db is given by 0 0 0 1 1 1 1 0. msb lsb function 0 0 b2 b1 b0 a2 a1 a0 volume 1.25db steps 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 0 0 b2 b1 b0 a2 a1 a0 volume 10db steps 0 0 0 0 0 0 1 -10 0 1 0 -20 0 1 1 -30 1 0 0 -40 1 0 1 -50 1 1 0 -60 1 1 1 -70
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 9 - december, 2006 2-channel audio processor ic PT2315A speaker attenuators the table below gives a detailed description of t he speaker attenuators data bytes. for example, an attenuation of 30db on the speaker l (le ft) is given by 1 0 0 1 1 0 0 0. msb lsb function 1 0 0 b1 b0 a2 a1 a0 speaker l 1 0 1 b1 b0 a2 a1 a0 speaker r 0 0 0 0 0 0 1 -1.25 0 1 0 -2.5 0 1 1 -3.75 1 0 0 -5 1 0 1 -6.25 1 1 0 -7.5 1 1 1 -8.75 0 0 0 0 1 -10 1 0 -20 1 1 -30 1 1 1 1 1 mute loudness function the following table shows the detailed description of the loudness function. for example, when the loudness function is turned on, the code format is 0 1 0 0 0 0 0 0 msb lsb function 0 1 0 * * l * * loudness control 0 loudness on 1 loudness off note: *=no effect
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 10 - december, 2006 2-channel audio processor ic PT2315A bass and treble data bytes the following table shows a detailed description of the bass and treble data byte. for example a treble at -12db is given by 0 1 1 1 0 0 0 1. msb lsb function 0 1 1 0 c3 c2 c1 c0 bass 0 1 1 1 c3 c2 c1 c0 treble 0 0 0 0 -14 0 0 0 1 -12 0 0 1 0 -10 0 0 1 1 -8 0 1 0 0 -6 0 1 0 1 -4 0 1 1 0 -2 0 1 1 1 0 1 1 1 1 0 1 1 1 0 2 1 1 0 1 4 1 1 0 0 6 1 0 1 1 8 1 0 1 0 10 1 0 0 1 12 1 0 0 0 14
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 11 - december, 2006 2-channel audio processor ic PT2315A absolute maximum ratings parameter symbol min. max. unit operating supply voltage v s - 10.5 v input current, any pin except supplies iin -10 10 ma input voltage (see note) vin -0.3 v s +0.3 v operating temperature topr -40 85 storage temperature tstg -65 150 note: transient currents of up to 100ma will not cause scr latch-up. quick reference data parameter symbol min. typ. max. unit supply voltage v s 6 9 10 v max. input signal handling v cl 2 2.5 - vrms total harmonic distortion (v = 1vrms, f = 1khz) thd - 0.03 0.07 % signal to noise ratio s/n - 95 - db channel separation (f=1khz) sc - 85 - db volume control 1.25db step -75 - 0 db bass & treble control 2db step -14 - +14 db balance control 1.25db step -37.5 - 0 db mute attenuation - 95 - db
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 12 - december, 2006 2-channel audio processor ic PT2315A electrical characteristics (unless otherwise specified, ta=25 , v dd =9v, r l =100k ? , rg=600 ? , all controls flat, f=1khz) parameter symbol test condition min. typ. max. unit supply supply voltage v dd 6 9 10 v supply current i s - 30 40 ma volume control input resistance r iv 15 25 35 k ? control range c range 70 75 80 db min. attenuation a vmin -1 0 1 db max. attenuation a vmax 70 75 80 db step resolution a step 0.5 1.25 1.75 db attenuation set error e a a v =0 to -20db a v =-20 to -60db -1.25 -3.0 0 1.25 2.0 db db speaker attenuators control range c range 35 37.5 40 db step resolution s step 0.5 1.25 1.75 db attenuation set error e a - - 1.5 db output mute attenuation a mute 90 95 - db bass control (see note) control range gb max. boost/cut 12 14 16 db step resolution b step 1 2 3 db internal feedback resistance r b 40 50 60 k ? treble control (see note) control range gt max. boost/cut 13 14 15 db step resolution t step 1 2 3 db audio outputs clipping level v ocl av=-8.75db, d=0.3% 2 2.5 - vrms output resistance r out - 40 45 ? dc voltage level v out 4.2 4.5 4.8 v load impedance r l 10 - - k ?
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 13 - december, 2006 2-channel audio processor ic PT2315A parameter symbol test condition min. typ. max. unit general bw=20~20khz, flat output muted all gains=0db - -100 -95 - db output noise n o a curve all gains=0db - -98 - db signal to noise ratio s/n all gains=0db v o =1vrms - 95 - db distortion d a v =0,v in =1vrms a v =0db, v in =0.2vrms - 0.03 0.03 0.07 0.05 % channel separation left/right sc 80 90 - db bus inputs input low voltage v il - - 1 v input high voltage v ih 3 - - v input current i in -5 - +5 a output voltage sda acknowledge v o i o =1.6ma - - 0.4 v note: for the bass and treble response, please refe r to the diagram below. the center frequency and quality of the resonance behavior can be selected by the external circuitry. a standard first order bass response can realized by a standard feedback network.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 14 - december, 2006 2-channel audio processor ic PT2315A typical tone response loudness vs volume attenuation frequency response (c 10 =c 11 =100nf) db hz (db) response frequency (hz)
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 15 - december, 2006 2-channel audio processor ic PT2315A c 10 , c 11 vs. loudness frequency response (volume=-4 0db, all other controls are flat) shorted to 220nf db 100nf 56nf 33nf 10nf open hz
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 16 - december, 2006 2-channel audio processor ic PT2315A electrical characteristics diagrams 0.001 20 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 % 1m 5 2m 5m 10m 20m 100m 500m 1 2 v total harmonic distortion and amplitude 1vrms output fft analysis -140 +0 -120 -100 -80 -60 -40 -20 d b 20 20k 50 100 200 500 1k 2k 5k 10k hz left and right channel crosstalk -120 +20 -100 -80 -60 -40 -20 +0 d b 20 20k 50 100 200 500 1k 2k 5k 10k hz
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 17 - december, 2006 2-channel audio processor ic PT2315A application circuit 18 19 20 9 13 12 4 mcu c4 100n c10 2.7n c3 22 c6 100n c7 100n c5 100n c11 2.7n c9 100n c8 100n r2 5.6k r1 5.6k lout rout 17 16 c12 10 c13 10 1 5 7 14 15 3 2 vdd c1 2.2 c2 2.2 am/fm tuner PT2315A + + + + + 11 6 vdd agnd ref loud_r bout_r bin_r treb_r rin lin dgnd data clk loud_l bout_l bin_l treb_l r r notes: 1. it is suggested that you use mylar capacitor for capacitors, c4 ~ c11. 2. recommended value of resistor (r)=1k.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 18 - december, 2006 2-channel audio processor ic PT2315A order information valid part number package information top code PT2315A-d 20 pins, dip, 300mil PT2315A-d PT2315A 20 pins, sop, 300mil PT2315A PT2315A-d (l) 20 pins, dip, 300mil PT2315A-d PT2315A (l) 20 pins, sop, 300mil PT2315A notes: 1. (l), (c) or (s) = lead free. 2. the lead free mark is put in front of the date code.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 19 - december, 2006 2-channel audio processor ic PT2315A package information 20 pins, dip, 300mil
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 20 - december, 2006 2-channel audio processor ic PT2315A symbol min. nom. max. a 0.210 a1 0.015 a2 0.115 0.130 0.195 b 0.014 0.018 0.022 b1 0.014 0.018 0.020 b2 0.045 0.060 0.070 b3 0.030 0.039 0.045 c 0.008 0.010 0.014 c1 0.008 0.010 0.011 d 0.980 1.030 1.060 d1 0.005 e 0.300 0.310 0.325 e1 0.240 0.250 0.280 e 0.100 bsc. ea 0.300 bsc. eb 0.430 ec 0.000 0.060 l 0.115 0.130 0.150 notes: 1. all dimensions are in inches. 2. dimensioning and toleranci ng per ansi y14.5m-1982. 3. dimension ?a?, ?a1? and ?l? are measured with t he package seated in jedec seating plane gauge gs-3 4. ?d? ?d1? and ?e1? dimensions do not include mold flas h or protrusions. mold flash or protrusions shall not exceed 0.010 inch. 5. ?e? and ?ea? measured with the leads constrained to be perpendicular to datum -c- . 6. ?eb? and ?ec? are measured at the lead tips with the leads unconstrained. 7. n is the number of the terminal positions (n=20) 8. pointed or rounded lead tips ar e preferred to ease insertion. 9. ?b2? and ?b3? maximum dimensions are not incl ude dambar protrusions. dambar protrusions shall not exceed 0.010 inch (0.25mm) 10. distance between leads including dambar protrusions to be 0.005 inch minimum. 11. datum plane -h- coincident with the bottom of lead, where lead exits body. 12. refer to jedec ms-001, variation ad. jedec is the trademark of jedec solid state technology association.
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 21 - december, 2006 2-channel audio processor ic PT2315A 20 pins, sop, 300mil symbol min. nom. max. a 2.35 2.65 a1 0.10 0.30 b 0.33 0.51 c 0.23 0.32 d 12.60 13.00 e 7.40 7.60 e 1.27 bsc. h 10.00 10.65 h 0.25 0.75 l 0.40 1.27 0 8
tel: 886-2-66296288 fax: 886-2-29174598 url: http://www.princeton.com.tw PT2315A v1.1 - 22 - december, 2006 2-channel audio processor ic PT2315A notes: 1. dimensioning and toleranci ng per ansi y14.5m-1982. 2. dimension ?d? does not include mold flash, protrusions or gate burrs. mo ld flash, protrusion or gate burrs shall not exceed 0.15 mm (0.006 in) per side. 3. dimension ?e? does not include interlead flash or prot rusions. interlead flash or protrusions shall not exceed 0.25 mm (0.010 in) per side. 4. the chamfer on the body is optional. it is not pres ent, a visual index feature must be located within the crosshatched area. 5. ?l? is the length of the terminal for soldering to a substrate. 6. n is the number of the terminal positions (n=20) 7. the lead width ?b? as measured 0.36 mm (0.014 in ) or greater above the seating plane, shall not exceed a maximum value of 0.61 mm (0.24 in). 8. controlling dimension: millimeter. 9. refer to jedec ms-013, variation ac. jedec is the trademark of jedec solid state technology association.

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