TK15121 Grand Earthing System Audio Signal Mute IC FEATURES APPLICATIONS ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Wide Voltage Range (1.8 ~ 5.5 V) Very Low Signal Distortion (typ. 0.005%) High Maximum Input Voltage (max. 4.2 VP-P) Very Low Standby Current (typ. 0.1 mA) Minimal External Component Circuitry Audio Systems Television VTR MD CD DESCRIPTION TK15121 The TK15121M is a “MUTE IC” of the Grand Earthing System that was developed as a low frequency signal attenuation for audio products. The mute function includes two channels which act simultaneously by one control key. IN/OUT 1 VCC CONTROL GND 20 P MUTE CAPACITOR IN/OUT 2 The optional time for the Attack/Release can be set up by the “Timing Control Capacitor”. BLOCK DIAGRAM DRIVER AMP CONTROL LOGIC ORDERING INFORMATION TK15121M TIME CONTROL Tape/Reel Code TAPE/REEL CODE TL: Tape Left April 1999 TOKO, Inc. Page 1 TK15121 ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC MAX) ....................................... 10 V Power Dissipation (Note 3) ................................ 200 mW Maximum Input Frequency (fMAX) ......................... 100 kHz Storage Temperature Range ................... -55 to +150 °C Operating Temperature Range ...................-20 to +60 °C TK15121M ELECTRICAL CHARACTERISTICS Test conditions: VCC = 3 V, TA = 25 °C, f = 1 kHz, VIN = 4 VP-P unless otherwise specified. SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNITS 1.8 3.0 5.5 V VCC Operating Voltage ICC OFF Supply Current Mute Off Current 0.1 0.2 mA ICC ON Supply Current Mute On Current 5.0 8. 0 mA ATT Attenuation RIN = 3 k Ω , Note 1 CION Mute On Charge Current Attack action. Note 2 10 16 µA CIOFF Mute Off Discharge Current Release action. Note 2 6.0 9.0 µA SWVOFF Mute Control SW Mute Off Voltage -0.3 0.5 V SWVON Mute Control SW Mute On Voltage 1.0 VCC + 0.3 V VOSAT Mute On Output Saturation Voltage TH D Mute Off Total Harmonic Distortion f = ~20 kHz GVA Gai n f = ~20 kHz VIN MAX Maximum Input Voltage THD = 0.01% 54 57 -dB 1.4 -0.5 mV 0.005 0.007 % 0 +0.5 dB 4.2 VP-P Note 1: If a RIN other that 3 kΩ is used, then the volume attenuation and attack/release time changes. Note 2: Attack is an action that changes to “mute on” from “mute off”, and release is action that changes to “mute off” from “mute on”. Standard capacity for the timing control is 0.22 µF. Note 3: Power dissipation is 200 mW when mounted as recommended. Derate at 1.6 mW/°C for operation above 25°C. Page 2 April 1999 TOKO, Inc. TK15121 TEST CIRCUIT AND METHODS 3 KΩ A1 THD SG V _ V ~ V1 3 KΩ A2 SG THD V _ V ~ V2 METHODS 1) Power supply current. · Power supply current in the ‘MUTE OFF’. When the control is ‘Lo (or open)’, measures the current ‘A1’. · Power supply current in the ‘MUTE ON’. When the control is’HI’, measures the current ‘A1’. 2) Attenuation volume. · When the control is ‘Hi’, attenuation is calculated by the following formula. ATT = 20Log ( Pin 1(Pin 3) AC voltage at V1 = 3 V Pin 1(Pin 3) AC voltage at V1 = 0 V ) 3) Current of the charge and discharge to the Condenser Pin. · Current of the charge. When the control is ‘Hi’ and the measurement is outflow current ‘A2’ when the Pin 4 voltage is 0.3 V. · Current of the discharge. When the control is ‘Lo (or open)’ and the measurement is inflow current ‘A2’ when the Pin 4 voltage is 0.3 V. 4) Voltage of the control switch. · Voltage for the control ‘Hi’. The first elevates Pin 2 voltage gradually from 0 V and if its action becomes ‘MUTE ON’ at the Pin 1 (Pin 3) output, t hen measures the voltage ‘V1’. · Voltage for the control ‘Lo’. The first lowers Pin 2 voltage gradually from VCC, and if its action becomes ‘MUTE OFF’ at the Pin 1 (Pin 3) output, then measures the voltage ‘V1’. 5) Output DC voltage at the ‘MUTE ON’. When the control is ‘Hi’, measures the Pin 1 (Pin 3) output voltage at non-input. 6) Total harmonic distortion. When the control is ‘Lo (or open)’, measures the distortion of the Pin 1 (Pin 3) output. 7) Signal Voltage Gain When the control is ‘Lo (or open)’, signal gain is calculated by the following formula. GV = 20Log ( Pin 1(Pin 3) AC voltage Pin 1(Pin 3) AC voltage front 3K ) 8) Maximum input signal voltage. When the control is ‘Lo (or open)’, the first elevates input AC voltage of Pin 1 (Pin 3) gradually from 0 VP-P, and if the distortion became 0.01 % at the Pin 1 (Pin 3) output, the measure the AC voltage. April 1999 TOKO, Inc. Page 3 TK15121 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25 °C, unless otherwise specified. SUPPLY VOLTAGE VS. CURRENT FREQUENCY VS. TOTAL HARMONIC DISTORTION SUPPLY VOLTAGE VS. CURRENT 1 8 Mute: off Mute: on 0.10 0.1 THD (%) 0.12 0 6 CURRENT (mA) CURRENT (mA) 0.14 4 0.01 2 0 2 3 4 5 0 6 0 2 3 4 5 0.001 0.01 6 0.1 1 10 100 VCC (V) VCC (V) f (kHz) OUTPUT VOLTAGE VS. TOTAL HARMONIC DISTORTION FREQUENCY VS. ATTENUATION VOLUME MUTE RESISTANCE VS. ATTENUATION VOLUME 1 0 0 -20 -20 ATT (dB) THD (%) ATT (dB) 0.1 -40 -40 0.01 -60 0.001 0.01 0.1 1 10 100 -60 -80 0.01 0.1 VOUT (VP-P) 1 10 -80 0.01 100 0.1 f (kHz) FREQUENCY VS. CROSS TALK 10 100 TEMPERATURE VS. SUPPLY CURRENT 8 -60 Mute: on 3V -70 6 3K -80 I/O_1 ~ -90 4 VP-P 3K I/O_2 V ~ -100 ICC (mA) CROSS TALK (dB) 1 RESISTANCE (kΩ) 4 2 -110 Cross Talk Test Circuit -120 0.01 0.1 1 f (kHz) Page 4 10 100 0 -40 -20 0 20 40 60 80 TA (°C) April 1999 TOKO, Inc. TK15121 TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) TA = 25 °C, unless otherwise specified. TEMPERATURE VS. CONTROL THRESHOLD VOLTAGE TEMPERATURE VS. CHARGE/DISCHARGE CURRENT TEMPERATURE VS. ATTENUATION VOLUME 16 -20 0.7 0.6 0.5 -40 12 charge 8 4 -20 0 20 40 60 -40 ATT (dB) CURRENT (µA) VCONT (V) 0.8 0 -40 80 TA (°C) -60 discharge -20 0 20 40 60 -80 -40 80 -20 0 TA (°C) 20 40 60 80 TA (°C) STANDARD APPLICATION out1 3V 3K in1 + 22 µ 3K in2 + 0.22 µ on out2 April 1999 TOKO, Inc. off Page 5 TK15121 TERMINAL VOLTAGE AND EQUAL VALUE CIRCUIT PIN NO. 1 3 SYMBOL 1in/out 2in/out DC VOLTAGE EQUAL VALUE CIRCUIT Floating/0V Floating/0V VCC 1 2 Control EXPLANATION 1pin: in/output for 1ch. 3pin: in/output for 2ch. 3 0V VCC Control Pin for the Mute on/off. 5K 2 30 K 4 Mute· C 0 V/ 0.6 V VCC Pin for timing capacitor for attack/release action. 100 K 4 5 GND Note 1 0V Ground pin. 5 6 VCC 1.8 ~ 5.5 V Supply Voltage pin. 6 VCC Note 1: Attack is an action that changes to ‘mute on’ from ‘mute off’, and release is an action that changes to ‘mute off’ from ‘mute on’. Standard capacity for the timing control is 0.22 µF. Page 6 April 1999 TOKO, Inc. TK15121 TIMING-CHART AND ACTION TIME AT MUTE Test conditions: VCC = 3 V, Timing Capacitor = 0.22 µF The following values are typical characteristics, accordingly they are not guaranteed values. [Attack action start (mute on)] When the mute action was attacked, the charge current starts inflow, then the voltage at the pin for the capacitor rises up to 0.6 V. The rise time to 0.6 V is the following formula. T1 ≈ Capacity X 0.6 V Charge Current 0.22 µF X 0.6 V 10 µA = = 13.2 msec The voltage of Pin 4 functions to 0.6 V by the upper limit circuit. In the estimate, when the pin of capacitor is 0.15 V and between 0.16 V, the attenuation value is about 90% in the final attenuation value. So it is the following calculation and timing chart. Control SW_on T2 ≈ 0.22 µF X 0.15 V 10 µA _ = 0.22 msec This time is the attack time. Capacitor pin volt. (V) 0.6 0.22 µF X 0.16 V 10 µA 0.2 4 pin 0.16 0.15 0.1 0 2 4 6 T1 10 12 14 (ms) T2 Output Input [Release action start (mute off)] When the mute action was released, the discharge current starts outflow, then the voltage at the pin for the capacitor drops up to 10 mV. The drop time to 10 mV is the following formula. 0.22 µF X 0.6 V Capacity X 0.6 V = T3 ≈ = 22 msec 6 µA Disharge Current In the estimate, when the pin of the capacitor is 0.16 V and between 0.15 V, the attenuation value is restored about 90% against the input value. So it is the following calculation and timing chart. Control SW_off T4 ≈ 0.22 µF X 0.16 V 6 µA _ 0.22 µF X 0.15 V 6 µA = 0.37 msec This time is the release time. Capacitor pin volt. (V) 0.6 4 pin 0.2 0.16 0.15 0.1 0 10 15 20 (ms) T3 T4 Output April 1999 TOKO, Inc. Page 7 TK15121 PACKAGE OUTLINE Marking Information SOT23L-6 TK15121M 121 0.6 6 5 4 e1 3.0 1.0 Marking 1 2 3 0.32 e +0.15 - 0.05 0.1 e 0.95 M e 0.95 e 0.95 3.5 0.95 Recommended Mount Pad +0.3 - 0.1 2.2 max 15 1.2 0.4 0.15 0.1 +0.15 - 0.05 0 - 0.1 1.4 max 0.3 (3.4) + 0.3 3.3 Dimensions are shown in millimeters Tolerance: x.x = ± 0.2 mm (unless otherwise specified) Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 TOKO AMERICA REGIONAL OFFICES Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375 Visit our Internet site at http://www.tokoam.com The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc. Page 8 © 1999 Toko, Inc. All Rights Reserved April 1999 TOKO, Inc. IC-119-TK119xx 0798O0.0K Printed in the USA