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DG201ACJ Datasheet(PDF) 6 Page - Maxim Integrated Products |
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DG201ACJ Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 12 page Quad SPST CMOS Analog Switches 6 _______________________________________________________________________________________ RDS(ON) AT ANALOG SIGNAL LEVEL POWER SUPPLIES -5V +5V -10V +10V -15V +15V ±5V 350 Ω 380 Ω ———— ±10V — — 165 Ω 250 Ω —— ±15V — — 125 Ω 160 Ω 135 Ω 155 Ω Typical RDS(ON) vs. Power Supplies for Maxim’s DG201A, and DG211 Protecting Against Fault Conditions Fault conditions occur when power supplies are turned off when input signals are still present, or when over- voltages occur at the inputs during normal operation. In either case, source-to-body diodes can be forward biased and conduct current from the signal source. If this current is required to be kept to low (µA) levels then the addition of external protection diodes is rec- ommended. To provide protection for overvoltages up to 20V above the supplies, a 1N4001 or 1N914 type diode should be placed in series with the positive and negative supplies as shown in Figure 2. The addition of these diodes will reduce the analog signal range to 1V below the posi- tive supply and 1V above the negative supply. 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 DG201A DG211 IN4001 -15V IN4001 +15V Figure 2. Protection against Fault Conditions LOGIC "0" - SW ON 3V VS 0 LOGIC INPUT tf < 20ns tr < 20ns SWITCH INPUT SWITCH OUTPUT 50% 0 V0 0.9 tON V0 V0 0.9 0.1 toff1 toff2 Ω SWITCH INPUT S1 VS = +2V IN1 LOGIC INPUT GND 0 V- -15V +15V V+ D1 RL 1k Ω CL 35pF V0 SWITCH OUTPUT (REPEAT TEST FOR IN2, IN3, AND IN4) V0 = VS RL RL + RDS(ON) TOP VIEW 16 15 14 13 5 1 2 3 4 12 11 10 9 67 8 S1 V- GND S4 S2 V+ N.C. S3 D1 IN1 IN2 D2 D4 IN4 IN3 D3 DG201A DG211 QFN* Pin Configurations (continued) Figure 1. Switching Time |
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