PI3A288 PERICOM | Alldatasheet
Document overview
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Technical content
Features
CMOS Technology for Bus and Analog Applications Negative Signal Handling Capability at all Ports Low On-Resistance: 0.35Ω at 1.8V Supply On-Resistance Flatness 0.001Ω Wide VDD Range: 1.65V to 4.3V 2.0Vrms analog signal range Programmable soft-start and soft-stop time -3dB Bandwidth: 255MHz High Off Isolation: -85dB @ 30kHz Low THD: 0.0003% from 20Hz to 20kHz, 0.5VRMS Crosstalk Rejection Reduces Signal Distortion: -85dB @ 30kHz High-impedance mode when VDD not applied ESD：4kV for HBM mode, 1kV for CDM mode Extended Industrial Temperature Range: –40° C to 85° C Packaging (Pb-free & Green): –10-contact UQFN (ZM10)
Applications
Cell Phones, PDAs, MP3 Players Portable Instrumentation Computer Peripherals Speaker Headset Switching Power Routing Relay Replacement Audio and Video Signal Routing PCMCIA Cards Modems
Description
PI3A288 is a dual, single -pole double throw (SPDT) CMOS switch with negative signal handling capability at all ports . It can be used as an analog switch or as a low-delay bus switch. Operating over a wide power supply voltage ranges from 1.65V to 4. 3V, PI3A288 processes a low on-resistance and distortion. The ultra - low THD performance enables PI3A288 to apply in high-quality audio applications. PI3A288 has also a soft -start and soft -stop feature so as to minimize signal disruption during channel switching Functional Block Diagram Pin Description Pin Name Description 1, 3 NOX Data Ports (Normally open)
4 GND Ground
2, 10 NCX Data Ports (Normally closed) 5, 8 COMX Common Output / Data Ports
9 VDD Positive Power Supply
7 IN Logic Control Pins
6 SSCAP Slew Rate Control Pin
Logic Input (IN) Function
0 NC1 Connected to COM1
1 NO1 Connected to COM1
2015-10-0009 PT0541-4 11/03/15 PI3A288 Ultra-Low-THD Dual-SPDT (0.35Ω) Analog Switch with Negative Signal Handling Capability Maximum Ratings Peak Current NO_NC_COM_ Peak Current NO_NC_COM_ Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the op erational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Control input must be held HIGH or LOW; it must not float. Recommended Operating Conditions Symbol Parameter Conditions Min. Typ. Max. Unit VDD Operating Voltage - 1.65 - 4.3 V VIN Control Input Voltage - 0 - 4.3 V VINPUT Switch Input Voltage VDD =< 2.3V 2.0 VRMS VDD > 2.3V 1.8 TA Operating Temperature - -40 25 85 °C
2015-10-0009 PT0541-4 11/03/15 PI3A288 Ultra-Low-THD Dual-SPDT (0.35Ω) Analog Switch with Negative Signal Handling Capability
Electrical Characteristics
(TA = –40° C to 85° C, unless otherwise noted. Typical values are at 1.8V and +25° C.) Parameter Symbol Test Conditions Min. Typ. Max. Units ANALOG SWITCH Analog Signal Range VNO, VNC, VCOM VDD =< 2.3V 2.0 VRMS VDD > 2.3V 1.8 On-Resistance RON VDD = 1.8V, VCOM = 0V Test Circuit Figure 1 - 0.35 - Ω On-Resistance Match Between Channels ΔRON VDD = 1.8V, VCOM = 0V between same NC_ and NO_ channel Test Circuit Figure 1 - 0.005 0.05 Ω On-Resistance Flatness RONF VDD = 1.8V, VCOM = -2.5V to +2.5V Test Circuit Figure 1 (NOTE1) 0.001 0.01 Ω Supply Current ICC VDD =1.8V - 70 110 μA DIGITAL INPUTS Input Logic High VIH 1.4 V Input Logic Low VIL 0.325 IN Input Leakage Current IIN VDD = 1.8V, VIN=0 or 1.8V -0.5 - 0.5 μA DYNAMIC CHARACTERISTICS Turn-Off Time tOFF VNO_ or VNC_ = 3V, RL = 32Ω SSCAP=float 65 μs Turn-On Time tON VNO_ or VNC_ = 3V, RL = 32Ω SSCAP=float 270 μs Soft-Start Time tSTART SSCAP=0.01uF VNC_ = 0.1V, 10% to 90% 5 ms Soft-Stop Time tSTOP SSCAP=0.01uF VNC_ = 0.1V, 90% to 10% 5 ms NC-NO and COM- NC/NO Off-Isolation OISO VBIAS=0V, VIN=0dBm See Test Circuit Figure 2 and Figure 3 30kHz - -85 - dB Channel-to-Channel Crosstalk XTALKD VBIAS=0V, VIN=0dBm See Test Circuit Figure 4 30kHz - -85 - dB -3dB Bandwidth f3dB VBIAS=0V, VIN=0dBm See Test Circuit Figure 5 - 255 - MHz Total Harmonic Distortion THD+N f=20Hz to 20kHz, RL=32Ω, VIN=0.5VRMS, VBIAS=0V (NOTE2) - -110 - dB Note 1 and Note 2 ：These parameters are measured on TA=25°C Capacitance Parameter Symbol Test Conditions Min. Typ. Max. Uni ts Control Pin Input Capacitance CIN VDD=0V, f=1MHz, - 6 - pF NC Off Capacitance CNC (OFF) VDD=1.8V, f = 1MHz, See Test Circuit Figure 6. - 14 - NO Off Capacitance CNO (OFF) VDD=1.8V, f = 1MHz, See Test Circuit Figure 6. - 14 - NC On Capacitance CNC (ON) VDD=1.8V, f = 1MHz, See Test Circuit Figure 7. - 35 - NO On Capacitance CNO (ON) VDD=1.8V, f = 1MHz, See Test Circuit Figure 7. - 35 -
2015-10-0009 PT0541-4 11/03/15 PI3A288 Ultra-Low-THD Dual-SPDT (0.35Ω) Analog Switch with Negative Signal Handling Capability Typical Application Circuit 0.1 uF 200 VC C=1.8 V NO1 COM1 NC 1 IN GPIO NO2 NC 2 COM2 VDD CT 0.0 1uF Negative Swin g Amplifier Au dio Co nnector Negative Swin g Amplifier Figure12, Crosstalk and Isolation Function Description The PI3A288 is an ultra -small, ultra-low THD , low on -resistance, high ESD -protected DPDT switch that operates from a +1.65V to 4.3V supply . These switches feature the low on -resistance (RON) necessary for high -performance switching applications. The Beyond-the-Rails signal capability of the PI3A288 allows signals below ground and above VCC to pass without distortion. Analog Signal Levels The topology of the switches allows the signal to drop below ground without the need of an external negative voltage supply. The devices can also withstand analog signal levels of 2Vrms. in the case of lower VDD voltage. Digital Control Input The PI3A288 provides a single-bit control logic input, IN. IN controls the switch position. The logic control inputs can be driven up to +4.3V regardless of the supply voltage. For example, given a +3.3V supply, the output enables or select pins may be driven to low to 0V and high to 4.3V. Figure12, Crosstalk and Isolation Crosstalk and Off isolation -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 10000 100000 1000000 10000000 100000000 1000000000 Freq (Hz) S21 (dB) Off isolation Crosstalk Frequency (Hz) Off Isolation Crosstalk SSCAP
2015-10-0009 PT0541-4 11/03/15 PI3A288 Ultra-Low-THD Dual-SPDT (0.35Ω) Analog Switch with Negative Signal Handling Capability Click and Pop Operation The PI3A288 can pass ground referenced audio signals which allows it to be directly connected to audio drivers that output ground referenced audio signals, eliminating the need for a DC blocking capacitor. Audio drivers that swing around ground, however, do generate some DC offset, from a few millivolts to tens of millivolts. When switching between audio channels or muting the audio signal, these small DC offset levels of the drivers can lead to a voltage step across the speaker loads and create unwanted clicks and pops. The PI3A288 has a special soft-start feature that slowly ramps the DC offset voltage from the audio driver to the speaker load when turning on a switch channel. The ramp rate at the load is determined by the capacitor value connected at the SSCAP pin. A soft-start capacitor value of 0.01μF provides obvious effect of eliminating pop-click noise and is recommended.
2015-10-0009 PT0541-4 11/03/15 PI3A288 Ultra-Low-THD Dual-SPDT (0.35Ω) Analog Switch with Negative Signal Handling Capability Mechanical Information 10-pin UQFN (ZM10)
Ordering Information
Part No. Package Code Package PI3A288ZMEX ZM Lead free and Green 10-pin UQFN1.8x1.4 Tape & reel Note: E = Pb-free and Green Adding X Suffix= Tape/Reel Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.