December, 2013, REV1.1 BCT4121N Negative-Voltage,1.0Ω,100MHz Dual SPST Analog Switch Suitable for Class-D Amp switch General Description The BCT4121 is a double-pole single-throw (DPST) analog switch with negative signal audio analog signals. The two channels have ultra Low on resistance (1.0 Ω) with good signal integrity. Each switch is bidirectional and offers little or no attenuation of the signals at the outputs. Industry-leading advantages include a propagation delay of less than 250ps, resulting from its low channel resistance and low I/O capacitance. The high channel-to-channel crosstalk rejection results in minimal noise interference. The device is special design for isolation of output of class-D PA from Baseband IC. Applications Cell Phones Pin Configurations Digital Still Cameras PDAs and Palmtop Devices MP3/MP4 Players Features ♦ VCC Operating Range: 1.65V to 5.0V ♦ Low ON Resistance: 1.0-ohms at 5.0V ♦ Rail-to-Rail Signal Range ♦ ON-Resistance Matching: 0.2 Ω ♦ ON-Resistance Flatness: 0.1Ω ♦ High Off Isolation: 57dB at 10MHz ♦ 54dB (10MHz) Crosstalk Rejection ♦ Break-Before-Make Switching ♦ Analog Signal Range: -2.0V - VCC ♦ Space-Saving, 8-Pin DFN 2mm X 2mm Logic Diagram (BCT4121 Top View) DFN2x2 - 8L Package Pin Definitions Pin Name Description 1 GND Ground 2 Vcc Power Supply 3,4 A1,A2 Analogue Input / Output 5,6 B1,B2 Analogue Input / Output 7 CTRL Logic Control Input. 8 NC No Connection. Ordering Information Ordering Code Package Description BCT4121NETA-TR 8-Pin DFN 2mm X 2mm Temp Range Top Marking –40°C to +85°C 4121 www.broadchip.com December, 2013, REV1.1 Truth Table CTRL Remarks 0 A and B Connect 1 A and B Dis-Connect Typical Application Circuit Absolute Maximum Ratings VCC,CTRL to GND............... ........................-0.65V to +5.25V All Other Pins to GND (Note 1)...........-0.65V to (VCC + 0.3V) Continuous Current (A1,A2, B1,B2)…….................. ±400mA Peak Current (,A1,A2, B1,B2).. (pulsed at 1ms, 10% duty cycle)..............................±500mA Continuous Power Dissipation (TA = +70°C) 8-Pin DFN (derate 15.6mW/°C above +70°C) ......1.25W Operating Temperature Range ....................-40°C to +85°C Storage Temperature Range......................-65°C to +150°C Junction Temperature...............................................+150°C Lead Temperature (soldering, 10s)...........................+300°C Note 1: Signals onA1,A2, B1,B2 exceeding VCC or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VCC = 2.7V to 4.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.0 V 1 uA VCC V 1.5 Ω POWER SUPPLY Supply Voltage Range VCC Supply Current ICC 1.6 VCC = 3.6V, CTRL = 0 or VCC,A1,A2, B1,B2 = floating 0.02 Low Ron Mode(Audio): Analog Signal Range On-Resistance A1,A2, B1,B2 -2.0 RON IB2=60mA, VA1, VA2 = 0 to VCC 1.0 On-Resistance Match ∆RON IB1= 60mA or IB2=8mA, VA1, VA2 = 1.2v (Note 3,4) 0.2 Ω On-Resistance Flatness RFLAT IB1= 60mA or IB2=60mA, V A1, VA2 = 0.6,1.8v (Note 5) 0.4 Ω A1,A2,Off-Leakage Current IOFF VB1,VB2, V A1, VA2 = 0.6,1.8v,or floating (Note 5) 50 100 nA B1,B2 On-Leakage Current ION VB1,VB2, VA1, VA2 = floating (Note 5) 50 100 nA www.broadchip.com December, 2013, REV1.1 Electrical Characteristics (continued) (VCC = 2.7V to 4.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC CHARACTERISTICS Turn-On Time TON VA1orVA2 =1.5V, RL=50Ω,CL = 35pF 20 50 ns Turn-Off Time TOFF VA1orVA2 =1.5V, RL=50Ω,CL = 35pF 15 50 ns Break-Before-Make Time TBBM VA1orVA2 =1.5V, RL=50Ω,CL = 35pF On-Channel Bandwidth -3dB BW RL = 50Ω, R, L to B1, B2 Off-Isolation VISO Crosstalk Total Harmonic Distortion Plus Noise VCT B1,B2 On-Capacitance DIGITAL INPUTS Input-Logic High Input-Logic Low Input-Logic High Input-Logic Low Input Leakage Current THD+N 2 B1, B2 = 1VRMS, RL = 50Ω, f = 100kHz, CL = 5pF B1,B2,RL=50Ω, f=100kHz,CL = 5pF f = 20Hz to 20kHz; VA1 or VA2 B1, B2,= 0.5VP-P; RL = 32Ω CB1(OFF) f = 1MHz, VB1 = VB2 = 1.5V CB2(OFF) VIH VIL VIH VIL IIN VCC=2.7V to 3.3V, VCC=2.7V to 3.3V, VCC=3.3 to 4.2V, VCC=3.3 to 4.2V, VIN_ = 0 or VCC , 15 ns 100 MHz -66 dB -86 dB 0.02 % 7 pF 1.4 0.5 1.5 0.8 ±1 V V V V uA Note 2: Devices are 100% tested at TA = +25°C. Limits across the full temperature range are guaranteed by design and correlation. Note 3: RON and RON matching specifications are guaranteed by design, Note 4: ∆RON = RON(MAX) - RON(MIN). Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over the specified analog signal ranges. Note 6: Guaranteed by design, not production tested. Package Information www.broadchip.com