Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A DESCRIPTION PT2315A is a two-channel digital audio processor utilizing 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 the highest performance and reliability with the least external components. All functions are programmable using the I2C Bus. The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantage for audio application. Housed in a 20-pin DIP and SOP, PT2315A is pin-to-pin 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 I2C 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 I2C Component of Princeton Technology Corporation (PTC) conveys a license under Philips I2C Patent Right to use these components in any I2C System, provided that the system conforms to the I2C Standard Specification defined by Philips PT2315A V1.1 -1- December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC BLOCK DIAGRAM PT2315A L OU D_L 9 B OU T_L B IN _L 12 13 TRE B_ L 4 RB L IN Vo lu me & L ou d ne ss 11 B ass Tre ble S pe ake r ATT 17 L OU T Mu te S er ial B u s D eco de r & La tche s 20 CL K 19 DATA 18 DG ND 16 RO UT S pe ake r ATT RIN Vo lu me & L ou d ne ss 6 B ass Tre ble Mu te RB S up pl y 2 3 1 V DD A GN D RE F PT2315A V1.1 7 L OU D_R 15 14 B OU T_R B IN _R -2- 5 TRE B _R December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A PIN CONFIGURATION RE F 1 20 CLK VD D 2 19 D ATA AG N D 3 18 DGND T R EB _ L 4 17 LOUT T R EB _ R 5 16 ROUT RIN 6 15 BO U T_ R LOUD_R 7 14 BI N _ R NC 8 13 BO U T_ L LOUD_L 9 12 BI N _ L 11 L IN PT23 15A NC 10 PIN DESCRIPTION Pin Name REF VDD AGND TREB_L TREB_R RIN LOUD_R NC LOUD_L LIN BIN_L BOUT_L BIN_R BOUT_R ROUT LOUT DGND DATA CLK PT2315A V1.1 I/O I I I I I I I O I O O O I I Description Analog Reference Voltage (1/2 VDD) Supply Input Voltage Analog Ground Left Channel Input for Treble Controller Right Channel Input for Treble Controller Audio Processor Right Channel Input Right Channel Loudness Input No Connection Left Channel Loudness Input Audio Processor Left Channel Input Left Bass Controller Input Channel Left Bass Controller Output Channel Right Channel Input for Bass Controller Right Channel Output for Bass Controller Right Speaker Output Left Speaker Output Digital Ground Control Data Input Clock Input for Serial Data Transmission -3- Pin No. 1 2 3 4 5 6 7 8, 10 9 11 12 13 14 15 16 17 18 19 20 December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A FUNCTION DESCRIPTION I2C BUS INTERFACE Data are transmitted to and from the microprocessor 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 CLK DATA LINE STABLE, DATA VALID DATA CHANGE ALLOWED 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 ST OP START PT2315A V1.1 -4- December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 (µP) 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. 1 CLK DATA 2 3 4 7 8 9 MSB AC KNOWLED GE MENT F ROM RECE IV ER START 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 (9th) 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 detection of the audio processor, a simpler µP transmission may be used. Wait one clock and do not check the slave acknowledge of this same clock then send the new data. If you use this approach, there are greater chances 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 8th 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 PT2315A V1.1 -5- December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A Please refer to the diagram below: PT2315 ADDRESS MSB FIRST BYTE LSB MSB START 1 0 0 0 0 0 0 0 ACK LSB MSB ACK DATA LSB ACK STOP DATA DATA TRANSMITTED (N-BYTES + ACKNOWLEDGE) 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 0 0 B2 B1 B0 A2 A1 A0 1 0 0 B1 B0 A2 A1 A0 1 0 1 B1 B0 A2 A1 A0 0 1 0 * * L * * 0 1 1 0 C3 C2 C1 C0 0 1 1 1 C3 C2 C1 C0 where Ax=1.25dB steps; Bx=10dB steps; Cx=2dB steps; *=no effect PT2315A V1.1 -6- Function Volume Control Speaker ATT L Speaker ATT R Loudness Control Bass Control Treble Control December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A I2C 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 10µf, the waiting time period for PT2315A to send I2C Bus Signal is at least 300ms. If the waiting time period is less than 300ms, I2C Control may fail. Please refer to the diagram below. V POWER ON 90% VDD VDD at least 300 mS SDA/SCL PT2315A V1.1 -7- December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 PT2315A V1.1 -8- December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A SPEAKER ATTENUATORS The table below gives a detailed description of the speaker attenuators data bytes. For example, an attenuation of 30dB on the Speaker L (Left) 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 PT2315A V1.1 -9- December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 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 1 1 1 1 PT2315A V1.1 - 10 - 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 0 2 4 6 8 10 12 14 December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A ABSOLUTE MAXIMUM RATINGS Parameter Operating supply voltage Input current, any pin except supplies Input voltage (see Note) Operating temperature Symbol VS Iin Vin Min. -10 -0.3 Max. 10.5 10 VS+0.3 Topr -40 85 Unit V mA V ℃ Storage temperature Tstg -65 Note: Transient Currents of up to 100mA will not cause SCR latch-up. 150 ℃ QUICK REFERENCE DATA Parameter Supply voltage Max. input signal handling Total harmonic distortion (V = 1Vrms, f = 1KHz) Signal to noise ratio Channel separation (f=1KHz) Volume control 1.25dB step Bass & treble control 2dB step Balance control 1.25dB step Mute attenuation PT2315A V1.1 Symbol VS VCL Min. 6 2 Typ. 9 2.5 Max. 10 - Unit V Vrms THD - 0.03 0.07 % S/N - 95 - dB Sc - 85 - dB -75 -14 -37.5 - 95 0 +14 0 - dB dB dB dB - 11 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Ta=25℃, VDD=9V, RL=100KΩ, Rg=600Ω, all controls flat<G=0>, f=1KHz) Parameter Symbol Test Condition Min. Typ. Max. Unit Supply Supply voltage VDD 6 9 10 V Supply current IS 30 40 mA Volume Control Input resistance RIV 15 25 35 KΩ Control range CRANGE 70 75 80 dB Min. attenuation AVMIN -1 0 1 dB Max. attenuation AVMAX 70 75 80 dB Step resolution ASTEP 0.5 1.25 1.75 dB -1.25 1.25 dB AV=0 to -20dB Attenuation set error EA 0 AV=-20 to -60dB -3.0 2.0 dB Speaker Attenuators Control range CRANGE 35 37.5 40 dB Step resolution SSTEP 0.5 1.25 1.75 dB Attenuation set error EA 1.5 dB Output mute attenuation AMUTE 90 95 dB Bass Control (see Note) Control range Gb Max. Boost/Cut ±12 ±14 ±16 dB Step resolution BSTEP 1 2 3 dB Internal feedback resistance RB 40 50 60 KΩ Treble Control (see Note) Control range Gt Max. Boost/Cut ±13 ±14 ±15 dB Step resolution TSTEP 1 2 3 dB Audio Outputs Clipping level VOCL AV=-8.75dB, d=0.3% 2 2.5 Vrms Output resistance ROUT 40 45 Ω DC voltage level VOUT 4.2 4.5 4.8 V Load impedance RL 10 KΩ PT2315A V1.1 - 12 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC Parameter General Output noise Signal to noise ratio PT2315A Symbol NO S/N Test Condition BW=20~20KHz, flat Output Muted All gains=0dB A Curve All Gains=0dB All Gains=0dB VO=1Vrms AV=0,VIN=1Vrms AV=0dB, VIN=0.2Vrms Min. Typ. Max. Unit - -100 -95 - dB - -98 - dB - 95 - dB - 0.03 0.03 0.07 0.05 % Distortion D Channel separation left/right Bus Inputs Input low voltage Input high voltage Input current Output voltage SDA acknowledge Sc 80 90 - dB VIL VIH IIN VO 3 -5 - - 1 +5 0.4 V V µA V IO=1.6mA Note: For the Bass and Treble Response, please refer 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. PT2315A V1.1 - 13 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A (dB) RESPONSE FREQUENCY (HZ) Typical Tone Response dB Hz Loudness vs Volume Attenuation Frequency Response (C10=C11=100nF) PT2315A V1.1 - 14 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A OPEN dB 56nF 220nF 33nF 10nF 100nF Shorted to Hz C10, C11 vs. Loudness Frequency Response (Volume=-40dB, All other controls are flat) PT2315A V1.1 - 15 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A ELECTRICAL CHARACTERISTICS DIAGRAMS 20 10 +20 5 +0 2 -20 1 0.5 % 0.2 d B 0.1 0.05 0.02 -40 -60 -80 0.01 0.005 -100 0.002 0.001 1m 2m 5m 10m 20m 100m 500m 1 2 -120 20 5 V 50 100 200 500 1k 2k 5k 10k 20k Hz Total Harmonic Distortion and Amplitude 1Vrms Output FFT Analysis +0 -20 -40 d B -60 -80 -100 -120 -140 20 50 100 200 500 1k 2k 5k 10k 20k Hz Left and Right Channel Crosstalk PT2315A V1.1 - 16 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A APPLICATION CIRCUIT R2 5.6K C4 100n MCU 18 + C2 2.2µ + C10 2.7n 20 9 13 12 4 LOUD_L BOUT_L BIN_L TREB_L R 11 RIN AM/FM Tuner C1 2.2µ C7 100n CLK 19 DGND DATA C6 100n 6 LOUT 17 C12 10µ + LIN R PT2315A ROUT 16 + C13 10µ VDD VDD AGND REF LOUD_R BOUT_R 2 3 1 7 15 C3 22µ + C5 100n C8 100n BIN_R TREB_R 5 14 C9 100n C11 2.7n R1 5.6K Notes: 1. It is suggested that you use Mylar Capacitor for capacitors, C4 ~ C11. 2. Recommended Value of Resistor (R)=1K. PT2315A V1.1 - 17 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A ORDER INFORMATION Valid Part Number PT2315A-D PT2315A PT2315A-D (L) PT2315A (L) Package Information 20 Pins, DIP, 300mil 20 Pins, SOP, 300mil 20 Pins, DIP, 300mil 20 Pins, SOP, 300mil Top Code PT2315A-D PT2315A PT2315A-D PT2315A Notes: 1. (L), (C) or (S) = Lead Free. 2. The Lead Free mark is put in front of the date code. PT2315A V1.1 - 18 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A PACKAGE INFORMATION 20 PINS, DIP, 300MIL PT2315A V1.1 - 19 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC Symbol A A1 A2 b b1 b2 b3 c c1 D D1 E E1 e eA eB eC L PT2315A Min. 0.015 0.115 0.014 0.014 0.045 0.030 0.008 0.008 0.980 0.005 0.300 0.240 0.000 0.115 Nom. Max. 0.210 0.130 0.018 0.018 0.060 0.039 0.010 0.010 1.030 0.195 0.022 0.020 0.070 0.045 0.014 0.011 1.060 0.310 0.250 0.100 bsc. 0.300 bsc. 0.325 0.280 0.130 0.430 0.060 0.150 Notes: 1. All dimensions are in INCHES. 2. Dimensioning and tolerancing per ANSI Y14.5M-1982. 3. Dimension ”A”, ”A1” and ”L” are measured with the package seated in JEDEC Seating Plane Gauge GS-3 4. “D”，”D1” and “E1” dimensions do not include mold flash 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 are preferred to ease insertion. 9. “b2” and “b3” maximum dimensions are not include 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. PT2315A V1.1 - 20 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A 20 PINS, SOP, 300MIL Symbol A A1 B C D E e H h L α PT2315A V1.1 Min. 2.35 0.10 0.33 0.23 12.60 7.40 Nom. Max. 2.65 0.30 0.51 0.32 13.00 7.60 1.27 bsc. 10.00 0.25 0.40 0° 10.65 0.75 1.27 8° - 21 - December, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 2-Channel Audio Processor IC PT2315A Notes: 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. 2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold 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 protrusions. 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 present, 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. PT2315A V1.1 - 22 - December, 2006