Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 DESCRIPTION PT2381 is a pre-set equalizer IC utilizing CMOS Technology specially designed for audio equipment. It features four sound selections, namely: Classical, Pops, Rock and Normal/Flat which may be selected by the 2 control pins (SW1 and SW2). PT2381 has 2 built-in channels - each containing an internal operation amplifier and selectable resistors. Thus, least external components are used. By connecting only 3 capacitors to each channel, the high performance pre-set equalizing function of this IC is achieved. Pin assignments and application circuit are optimized for easy PCB layout and cost saving for audio applications. PT2381 is housed in a 16-Pin DIP or SOP Package and is suitable for stereo applications. FEATURES • • • • • • • • CMOS technology Least external components Enhanced effects of PT2380 Available in 16 Pins, DIP or SOP 4 sound effect selections available: Classical, Pops, Rock, and Normal/Flat Wide operating voltage range: Vcc=2 ~ 15V Two channels in the one chip Can be controlled by micro-processor output pin which is compatible with TA2078, M62412 interface definition APPLICATIONS • • • • • • • Mini compo Car stereo Radio cassette recorders Multi-media speaker MPEG card Mini walk-man Other audio equipment PT2381 V1.2 -1- March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 BLOCK DIAGRAM 50 K IN1 1 - + 39 K 39 K P, C - R 24 K 15 K CA P 1_1 3 CA P 1_2 20 K P P 20 K 4K R, C R, C 4K R C 15 K 24 K 1K R, C R, C 2.2 K V CC 7 G ND 8 14 CA P 2_1 13 CA P 2_2 12 NF 2 11 CA P 2_3 10 SW2 9 SW1 10 K 1K NF 1 5 6 O UT 2 P 4 CA P 1_3 15 P, C P 10 K IN2 39 K 39 K O UT 1 2 C 16 16 K + 16 K 50 K Refe re nc e Vol tage P P 2.2 K P C R Co ntr ol where: 1. N=Normal/Flat Mode 2. C=Classic Mode 3. P=Pops Mode 4. R=Rock Mode PT2381 V1.2 -2- March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 PIN CONFIGURATION IN1 1 16 IN2 O U T1 2 15 OUT 2 C A P 1_ 1 3 14 C A P 2 _1 C A P 1_ 2 4 13 C A P 2 _2 N F1 5 12 NF 2 C A P 1_ 3 6 11 C A P 2 _3 V CC 7 10 SW 2 GND 8 9 SW 1 P T 2 38 1 PIN DESCRIPTION Pin Name IN1 OUT1 CAP1_1 CAP1_2 NF1 CAP1_3 VCC GND SW1 SW2 CAP2_3 NF2 CAP2_2 CAP2_1 OUT2 IN2 PT2381 V1.2 I/O I O I I O I Description Signal Input Pin 1 Signal Output Pin 1 This pin is connected to Pin 5 by an external Capacitor This pin is connected to Pin 5 by an external Capacitor Feedback Node 1 This pin is connected to Pin 5 by an external Capacitor Positive Power Supply Ground Mode Switch 1 Mode Switch 2 This pin is connected to Pin 12 by an external Capacitor Feedback Node 2 This pin is connected to Pin 12 by an external Capacitor This pin is connected to Pin 12 by an external Capacitor Signal Output Pin 2 Signal Input Pin 2 -3- Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 FUNCTION DESCRIPTION PT2381 is pre-set to 4 modes: Normal/Flat, Rock, Classical and Pops. These 4 modes may be selected using two switches, namely: SW1 (Pin. No.9) and SW2 (Pin No.10). Please refer to the SW1 & SW2 Mode Conditions below. Mode Normal/Flat Rock Classic Pops SW1 Low Low High High SW2 Low High Low High where: 1. Low: SW1/SW2 ≤ 1V 2. High: SW1/SW2 ≥ 3.5V for VCC=5 ~ 12V The Output Voltage Gain vs. the Frequency Graph for the 4 preset modes is given below: Output Voltage Gain (dB) Gv Output Voltage Gain vs Frequency 25 20 15 10 Normal Mode 5 Rock Mode Classic Mode 0 10 100 1000 Frequency PT2381 V1.2 10000 f -4- 100000 Pops Mode (Hz) March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 ABSOLUTE MAXIMUM RATINGS (Unless otherwise specified, Ta=25℃) Parameter Supply voltage Power dissipation (Ta ≤ 25℃) Thermal derating (Ta > 25℃) Operating temperature Storage temperature Switch input voltage range Symbol VCC max Pd Ko Topr Tstg VI PT2381 V1.2 -5- Ratings 15 1000 10.0 -40 ~ +85 -65 ~ +150 -0.3 ~ VCC+0.3 Unit V mW mW/℃ ℃ ℃ V March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 ELECTRICAL CHARACTERISTICS Preset Mode In order to best describe this IC, an application example is hereby given. The application example’s electrical characteristics are enumerated below. (Unless otherwise specified, VCC=12.0V, Vi=0.1Vrms and f=1KHz) Parameter Symbol Condition Data Unit Circuit operation current ICC VCC=12.0 V, Vi=0.0 V 8.0 mA Bass GBn f=80Hz 11 dB Normal Mode Mid GMn f=1KHz 11 dB Voltage Gain Treble GTn f=10KHz 11 dB Bass GBr f=80Hz 20 dB Rock Mode Mid GMr f=1KHz 13 dB Voltage Gain Treble GTr f=10KHz 17 dB Bass GBc f=80Hz 17 dB Classic Mode Mid GMc f=1KHz 12 dB Voltage Gain Treble GTc f=10KHz 17 dB Bass GBp f=80Hz 12 dB Pops Mode Mid GMp f=1KHz 17 dB Voltage Gain Treble GTp f=10KHz 13 dB f=1KHz Maximum output VOM Vcc=5V,Vi=0.3Vrms 1.5 Vrms voltage Vcc=12V,Vi=0.8Vrms 4.0 Total harmonic THD BW=400Hz~30KHz A-Weighting 0.02 % distortion BW=400Hz~30KHz A-Weighting, Output noise voltage VNO 50 µVrms Vi=0.0V Input resistor Ri 50 KΩ SOUND FREQUENCY CHARACTERISTICS OF THE APPLICATION EXAMPLE NORMAL MODE Response (dB) Normal Mode Frequency Characteristics 25 20 15 10 5 1 100 10000 Frequency f (Hz) PT2381 V1.2 -6- March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 CLASSIC MODE Response (dB) Classic Mode Frequency Characteristics 25 20 15 10 5 10 100 1000 Frequency 10000 f 100000 (Hz) POPS MODE (dB) Pops Mode Sound Frequency Characteristics 25 Response 20 15 10 5 10 100 1000 Frequency 10000 f 100000 (Hz) ROCK MODE Response (dB) Rock Mode Frequency Characteristics 25 20 15 10 5 10 100 1000 Frequency PT2381 V1.2 -7- 10000 f (Hz) March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 APPLICATION CIRCUIT IN1 10µ _ 0.047µ 4 4700p PT2381 13 5 12 6 11 0.068µ Vcc 47µ + 7 10 8 9 _ IN2 _ OUT2 10µ 14 3 10µ + 15 2 10µ + 16 1 + OUT1 + _ 0.047µ 4700p Vcc 0.068µ L SW2 SW1 H H L Note: The Capacitor’s Polarity of Pins: IN1, IN2, OUT1, OUT2 are dependent on the applied DC Level of Pins IN1, IN2, OUT1, OUT2. APPLICATION CIRCUIT WITH MICRO-CONTROLLER CONNECTION PT2381 V CC (5V) MCU PT2381 V1.2 V CC (5V~12V) SW2 GND SW1 -8- GND March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 ORDER INFORMATION Valid Part Number PT2381 PT2381-S PT2381 V1.2 Package Type 16 Pins DIP, 300mil 16 Pins SOP, 300mil -9- Top Code PT2381 PT2381-S March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 PACKAGE INFORMATION 16 PINS, DIP, 300MIL PT2381 V1.2 - 10 - March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC Symbol A A1 A2 b b1 b2 b3 c c1 D D1 E E1 e eA eB eC L PT2381 Min. 0.015 0.115 0.014 0.014 0.045 0.030 0.008 0.008 0.780 0.005 0.300 0.240 0.000 0.115 Dimensions In Inches Nom. 0.130 0.018 0.018 0.060 0.039 0.010 0.010 0.790 0.310 0.250 0.100 bsc. 0.300 bsc. 0.130 Max. 0.210 0.195 0.022 0.020 0.070 0.045 0.014 0.011 0.800 0.325 0.280 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=16) 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 AB. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. PT2381 V1.2 - 11 - March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 16 PINS, SOP, 300MIL Symbol A A1 B C D E e H h L α PT2381 V1.2 Min. 2.35 0.10 0.33 0.23 10.10 7.40 Dimensions In Millimeter Nom. Max. 2.65 0.30 0.51 0.32 10.50 7.60 1.27 bsc. 10.00 0.25 0.40 0° 10.65 0.75 1.27 8° - 12 - March, 2006 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 4-Mode Preset Equalizer IC PT2381 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 0.15mm (0.006 in) per side. 3. Dimension “E” does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm (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=16) 7. The lead width “B” as measured 0.36mm (0.014 in) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.24 in). 8. Controlling dimension: MILLIMETER. 9. Refer to JEDEC MS-013, Variation AA. JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION. PT2381 V1.2 - 13 - March, 2006