Texas Instruments CD4066B Quad Bilateral Switch
Texas Instruments CD4066B Quad Bilateral Switch is intended for transmitting or multiplexing analog or digital signals. The device is pin-for-pin compatible with the CD4016B but exhibits a much lower on-state resistance. The on-state resistance is also relatively constant over the full signal-input range. The CD4066B device consists of four bilateral switches with independent controls. Both the p and the n devices in a given switch are biased on or off simultaneously by the control signal. The well of the n-channel device on each switch is tied to either the input (when the switch is on) or to VSS (when the switch is off). This configuration eliminates the variation of the switch-transistor threshold voltage with an input signal and keeps the on-state resistance low over the full operating-signal range.
Features
- 15V Digital or ±7.5V peak-to-peak switching
- 125Ω Typical on-state resistance for 15V operation
- Switch on-state resistance matched to within 5Ω Over 15V signal-input range
- On-state resistance flat over full peak-to-peak signal range
- High ON/OFF output-voltage ratio of 80dB typical at fis = 10kHz, RL = 1kΩ
- High degree of linearity of < 0.5% distortion typical at fis = 1kHz, Vis = 5Vp-p VDD – VSS ≥ 10V, RL = 10kΩ
- Extremely low off-state switch leakage, resulting in very low offset current and high effective off-state resistance at 10pA typical at VDD – VSS = 10V, TA = 25°C
- Extremely high control input impedance (Control circuit isolated from the signal circuit) of 1012Ω typical
- Low crosstalk between switches of –50dB typical at fis = 8MHz, RL = 1kΩ
- Matched control-input to signal-output capacitance that reduces output signal transients
- Frequency response, switch on = 40MHz typical
- 100% Tested for quiescent current at 20V
- 5V, 10V, and 15V Parametric ratings
Applications
- Analog signal switching/multiplexing: signal gating, modulators, squelch controls, demodulators, choppers, commutating switches
- Digital signal switching/multiplexing
- Transmission-gate logic implementation
- Analog-to-digital and digital-to-analog conversions
- Digital control of frequency, impedance, phase, and analog-signal gain