95020 PA4201 Pop-Up-Noise Killer ANALOG PRODUCTS DIVISION FEATURES GENERAL DESCRIPTION • Extremely Low supply current (<1μA). • • • • PA4201 (PUNK) is a low power (ICC< 1μA) monolithic CMOS mixed signal device. PUNK’s primary function is to control power supply transition noise in audio circuits and systems. PUNK boasts several features that make it a “one of a kind” product on the market. Most prominent is the feature that allows the designer to implement SOFTMUTE on an audio line during normal operation. PUNK is an exceptional product for multi-channel devices as it is capable of expanding the SOFTMUTE operation into systems s u c h a s Dolby®5.1, >45dB mute attenuation. Shunt operation. SOFTMUTE during normal operation. Built-in expansion capability, SOFTMUTE out for driving additional channels. Instantaneous. Power-up and Power-down muting. ESD protected outputs. 1.5V to 2.7V supply operation. Compact 2 x 2 x 0.6mm 8 lead DFN. • • • • DTS™. APPLICATIONS • • • • • • • • • PUNK requires few external components for its operation, working from low to medium supply voltages of 1.5V to 2.7V. Cell phones PDA’s Portable DVD players Portable MP3 players Notebook Audio Set-top boxes Digital Video Recorders LCD TVs Home Theater systems On power-up and power-down the audio inputs to succeeding amplifiers are switched to a convenient low impedance voltage rail. Muting the amplifiers, preventing the audible pop, that is normally heard in the headset. PUNK operates as a passive shunt device. So the designer does not have to worry about the PUNK introducing any kind of noise or distortion into the system. While consuming less than 1μA of supply current PUNK provides more than 45dB of mute attenuation at the audio lines. Pin Layout 1 2 PUNK is equipped with ESD (Human Body Model) protection circuitry on the outputs. 3 4 PUNK is available as an 8L low profile 0.6mm DFN package and is specified for operation over the -40° C to +85°C temperature range. Typical Application Circuit 8 7 6 5 Right Input Mute Control R2 220Ω Right Output Vcc C4 0.22µF R3 10KΩ 8 6 PA4201 2X2x0.6mm 2 5 Mute2 Mute1 3 C3 4.7µF 7 1 4 Left Input C1 0.1µF R4 220Ω C5 0.22µF SMUTEOUT Left Output R5 10KΩ Vcc 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 Pop-Up-Noise Killer ANALOG PRODUCTS DIVISION PIN OUT Pin Name Function 1 VCC Positive power supply. 1.5V to 2.7V ±10% 2 RCS Power On mute delay resistor-capacitor connection 3 CEXT Soft mute delay capacitor 4 SMUTEOUT Soft Mute OUT for multiple channels 5 MUTE1 Open Drain output of NFET 1 6 MUTE2 Open Drain output of NFET 2 7 GND Ground 8 MUTECONT Mute control signal from microprocessor ABSOLUTE MAXIMUM RATINGS Sustained operation at or above the following ratings is not recommended. Catastrophic and irreversible damage will occur to the device at or above these ratings. Symbol Description Rating VX Voltage at any pin -0.3 to 7.0+ 0.3 V IX Current at any pin 500mA TA Ambient Temperature 150 °C TS Storage Temperature 200 °C TSOL Soldering Temperature 260 °C 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 Pop-Up-Noise Killer ANALOG PRODUCTS DIVISION RECOMMENDED OPERATING CONDITIONS: DC OPERATING CONDITIONS Unless otherwise specified, VDD=3 ± 10%, TA = Ambient Temperature = 25 °C. Limit Symbol Parameter Condition Unit Min VDD Power Supply Normal Operation IDD Supply Current Normal Operation TA Ambient Temperature Normal Operation VOH Logic High O/P Voltage IOH=100μA VOL Logic Low O/P Voltage IOL=-100μA VIH Logic High I/P Voltage IIH=1μA VIL Logic Low I/P Voltage IIL=1μA RON FET ON Resistance Typical 1.5 -40 Max 3.0 V 1 µA 85 ºC VDD-0.1 V 0.2 VDD-0.3 V V 0.3 VDD = 2.7V, VDFET = 0.4V 0.88 1.1 VCC = 5.5V, VDFET = 0.4V 0.55 0.66 V Ω RFLAT(ON) ON Resistance Flatness Over Input Voltage Range 3.55 mΩ THD Total Harmonic Distortion RL = 32 Ω, 30mW, f = 1kHz .020 % XTALK Crosstalk (on) F = 20kHz -100 dB VSIG Analog Signal Range Normal Operation 0.7 VRMS MUTE OPERATING CONDITIONS Limit Symbol Parameter Condition Unit Min MOFFD Mute release delay MSTD Soft mute fall/rise time MPDEL* Mute ON Delay NFETV* NFET open drain volt Mute Control =VIL Set by ext. RC network at RCS pin Mute Control transitions to VIH. Set by ext. capacitor CEXT Mute control signal, Low to High transition Typical Max 10 mS 1 mS 1 µS 7.0 V * Guaranteed by design 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 ANALOG PRODUCTS DIVISION Pop-Up-Noise Killer TURN ON TIME Cext µF tsoftmute in ms 0.1 36.03 0.2 71.06 0.3 97.4 0.4 110.05 0.5 117.2 CAPACITIVE LOAD Max Cap Load @ SMUTEOUT VDD T mS CEXT nF 5.5 18 20 3.3 20 15 2.7 20 15 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 ANALOG PRODUCTS DIVISION Pop-Up-Noise Killer THEORY OF OPERATION STARTUP During Startup, the Power supply ramps from 0V to VCC. This time is usually in excess of 20ms. As soon as this change in voltage is sensed, PUNK latches the Mute Controller outputs to HIGH, thus “muting” the lines. This is the Startup Operation (figure 1). The duration for which the controller outputs are latched HIGH can be controlled by an external RC circuit. When the voltage at this RC pin reaches a certain threshold, the mute controller releases the lines (Gate voltage is LOW) and Normal Operation starts. Figure 1: Startup Pop-Noise Reduction SHUTDOWN During Shutdown, the reverse process happens. As the power supply reaches the threshold on its way down, the mute controller again latches the outputs to HIGH, thus “muting” the lines (figure 2). This muting prevents unwanted signal spikes from getting to the power amplifiers. However, for optimal performance, it is suggested to mute the lines using the MUTECONT signal before power down. This process will ensure that the pop noise involved during shutdown is diminished Figure 2: Shutdown Pop-Noise Reduction SOFTMUTE During normal operation, PUNK is in OFF state. But if there arises a situation when the audio lines need to be muted, the designer can do this by asserting the MUTECONT signal to HIGH. This will initiate a SOFTMUTE sequence (figure 3). When the MUTECONT signal is asserted, the mute controller gradually ramps the control voltages in a “SOFT” fashion so as to provide a soft mute operation. The mute delay is fully controllable by the designer by using an external capacitor at CEXT. Typical values of CEXT are between 0.1μF and 0.5μF. The reverse happens when the MUTECONT signal is released. This operation is explained in detail in the Application Circuit section. Figure 3: SOFT mute operation 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 ANALOG PRODUCTS DIVISION Pop-Up-Noise Killer Figure 4: Startup Pop-Noise without PUNK Figure 7: Shutdown Pop-Noise with PUNK Figure 5: Shutdown Pop-Noise without PUNK Figure8: Audio Mute Enable Figure 6: Startup Pop-Noise with PUNK Figure 9: Audio Mute Disable 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 Pop-Up-Noise Killer ANALOG PRODUCTS DIVISION PACKAGE DIMENSIONS AND MEASUREMENTS PA4201DN P1 L1 p MILLIMETERS MIN TYP MIN 1.95 2.00 2.05 1.95 2.00 2.05 0.50 0.60 0.70 0.23 0.25 0.27 0.33 0.35 0.40 0.02 0.02 0.02 0.50 0.50 0.50 1.50 1.60 1.70 0.60 0.70 0.80 Dim 1 P1 P2 P3 L1 L2 L3 p G1 G2 g L2 4 P2 G2 8 5 G1 TOP VIEW BOTTOM VIEW 0.30±0.025mm P3 0.80±0.025mm g SIDE VIEW 2.20±0.025mm 0.80±0.025mm 1.70±0.025mm Recommended Pattern Layout Reel Dia A0 B0 K0 D E F W P0 P2 P t-max 178 (7”) 2.00±0.10 2.00±0.10 0.65±0.10 1.50±0.10 1.75±0.10 3.50±0.05 8.00±0.30 4.00±0.10 2.00±0.05 4.00±0.10 0.25 P0 D t P2 10 Pitches Cumulative Tolerance on Tape± 0.2 E Pin 1 indicated by Dot Top cover tape A0 F W K0 B0 P 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS PA4201 Pop-Up-Noise Killer ANALOG PRODUCTS DIVISION PACKAGE DIMENSIONS AND MEASUREMENTS PA4201DQ PACKAGE OUTLINE SO-8 -A- 8 5 + -B - P I G 0.0I0” (0.25 MM) M B M PACKAGE DIMENSIONS 4 PL 4 DIM A B C D F G J K P R D C 45 0 - I0 -T- + J F MILLIMETERS MIN MAX 4.80 3.80 1.35 0.35 0.40 1.27 BSC 0.18 0.10 5.80 0.25 INCHES MIN MAX 5.00 0.189 0.196 4.00 0.150 0.157 1.75 0.054 0.068 0.49 0.014 0.019 1.250 0.016 0.049 1.27 BSC 0.05 BSC 0.05 BSC 0.25 0.007 0.009 0.25 0.004 0.008 6.20 0.229 0.244 0.50 0.010 0.019 NOTES 0.0I0” (0.25 MM) M T B S A S 8 PL MOUNTING PAD 0.050 + 0.005” 0.030 + 0.005” 1. 2. 3. 4. 5. 6. - T - = Seating Plane and Datum Surface. Dimensions “A” and “B” are Datum. Dimensions “A” and “B” do not include mold protrusion. Maximum mold protrusion is 0.015” (0.380 mm) per side. Dimensioning and tolerances per ANSI Y14.5M, 1982. Dimensions are exclusive of mold flash and metal burrs. TAPE & REEL/BULK ORDERING NOMENCLATURE 0.I60 + 0.005” 0.045 + 0.005” 0.245” M!" 1. 2. 3. 4. Surface mount product is taped and reeled in accordance with EIA-481. Suffix-T7 = 7 Inch Reel - 1,000 pieces per 12mm tape. Suffix-T13 = 13 Inch Reel - 2,500 pieces per 12mm tape. No Suffix = Product Shipped in Tubes of 98 pcs per Tube. Outline & Dimensions: Rev 1 - 11/01, 06009 561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 431-2288 www.protekanalog.com 95020 Rev.1. 06/09 PATENT PENDING NOT FOR USE IN LIFE SUPPORT SYSTEMS