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CWB309CY Datasheet(PDF) 7 Page - Calogic, LLC |
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CWB309CY Datasheet(HTML) 7 Page - Calogic, LLC |
7 / 7 page CWB308 / CWB309 CORPORATION APPLICATIONS LOW DISTORTION, RAIL-TO-RAIL ANALOG SWITCH Features very low distortion for low frequency and large signal applications. VERY LOW DISTORTION CIRCUIT FOR LOW FREQUENCY AND LARGE SIGNAL APPLICATIONS This circuit provides very low distortion ( <0.1%) and high off isolation ( >90 dB) at signal levels equal to the supply voltage. The signal passes through a T switch configuration and at the same time is modulating the power supply. This modulation maintains a constant on resistance rDS(on) which in turn reduces the distortion. R5 is for bypassing the power supply and has a typical value of 1K ohm, R4 should be a value that can be accommadated by the signal source as load, R3 is only necessary at loads lower than 100 ohms and should be selected during the initial design of the circuit, C1 has to be large enough for the lowest signal to pass and C2 will have to bypass all signals. R1 and R2 set up the one logic level for the control input and should be set to 5 volts. ANALOG IN R 1 2 3 45 C 6 -V ANALOG OUT V+ V- RR R R R +V C 1 2 LOGIC INVERTER This circuit provides logic inversion with two resistors and one switch. It does not require additional logic parts. The resistors divide the supply voltage down to a 5 volt level when high and are switched to a low level via the switch. This configuration allows a single pole, single throw switch to be changed into a single pole, double throw switch. 1 ANALOG OUT R ANALOG IN 5V V+ R2 |
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