CD4066-BE – Texas Instruments

The CD4066B device is a quad bilateral switch intended for the transmission or multiplexing of analog or digital signals. It is pin-for-pin compatible with the CD4016B device but exhibits a much lower on-state resistance. In addition, the on-state resistance is relatively constant over the full signal-input range.

The CD4066B device consists of four bilateral switches, each with independent controls. Both the p and the n devices in a given switch are biased on or off simultaneously by the control signal. As shown in Figure 17, the well of the n-channel device on each switch is tied to either the input (when the switch is on) or to V_SS (when the switch is off). This configuration eliminates the variation of the switch-transistor threshold voltage with the input signal and, thus, keeps the on-state resistance low over the full operating-signal range.

The advantages over single-channel switches include peak input-signal voltage swings equal to the full supply voltage and more constant on-state impedance over the input-signal range. However, for sample-and-hold applications, the CD4016B device is recommended.

Features and Specifications:

1. 15-V Digital or ±7.5-V Peak-to-Peak Switching
2. 125-Ω Typical On-State Resistance for 15-V Operation
3. Switch On-State Resistance Matched to Within 5 Ω Over 15-V Signal-Input Range
4. On-State Resistance Flat Over Full Peak-to-Peak Signal Range
5. High On or Off Output-Voltage Ratio: 80 dB Typical at f_is = 10 kHz, R_L = 1 kΩ
6. High Degree of Linearity: <0.5% Distortion Typical at f_is = 1 kHz, V_is = 5-V_p-p V_DD – V_SS ≥ 10-V, R_L = 10 kΩ
7. Extremely Low Off-State Switch Leakage, Resulting in Very Low Offset Current and High Effective Off-State Resistance: 10 pA Typical at V_DD – V_SS = 10-V, T_A = 25°C
8. Extremely High Control Input Impedance (Control Circuit Isolated From Signal Circuit): 10¹² Ω Typical
9. Low Crosstalk Between Switches: –50 dB Typical at f_is = 8 MHz, R_L = 1 kΩ
10. Matched Control-Input to Signal-Output Capacitance: Reduces Output Signal Transients
11. Frequency Response, Switch On = 40 MHz Typical
12. 100% Tested for Quiescent Current at 20-V
13. 5-V, 10-V, and 15-V Parametric Ratings

Package Includes:

1 x CD4066-BE 20-V 1:1 (SPST) 4-channel analog switch IC