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DG408CY Datasheet(PDF) 6 Page - Maxim Integrated Products |
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DG408CY Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 12 page __________Applications Information Operation with Supply Voltages Other than ±15V Using supply voltages other than ±15V reduces the analog signal range. The DG406/DG407 switches oper- ate with ±4.5V to ±20V bipolar supplies or with a +4.5V to +30V single supply; connect V- to GND when operat- ing with a single supply. Also, both device types can operate with unbalanced supplies such as +24V and -5V. The Typical Operating Characteristics graphs show typical on-resistance with 20V, 15V, 10V, and 5V supplies. (Switching times increase by a factor of two or more for operation at 5V.) Overvoltage Protection Proper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi- mum ratings because stresses beyond the listed rat- ings may cause permanent damage to the devices. Always sequence V+ on first, then V-, followed by the logic inputs and analog signals. If power-supply sequencing is not possible, add two small signal diodes in series with supply pins for overvoltage pro- tection (Figure 1). Adding diodes reduces the analog signal range to 1V above V+ and 1V below V-, but low switch resistance and low leakage characteristics are unaffected. Device operation is unchanged, and the difference between V+ and V- should not exceed +44V. Improved, 16-Channel/Dual 8-Channel, CMOS Analog Multiplexers 6 _______________________________________________________________________________________ Bidirectional Output D 28 Address Inputs A3–A0 14–17 Enable Inputs EN 18 Bidirectional Analog Inputs S1–S8 19–26 Negative Supply Voltage Input V- 27 Ground GND 12 Bidirectional Analog Inputs S16–S9 4–11 DG406 PIN No Internal Connections N.C. 2, 3, 13 Positive Supply Voltage Input V+ 1 FUNCTION NAME Negative Supply Voltage Input V- 27 Bidirectional Output A DA 28 Ground GND 12 Address Inputs A2, A1, A0 15, 16, 17 Enable Input EN 18 Bidirectional Analog Inputs S1A–S8A 19–26 Bidirectional Analog Inputs S8B–S1B 4–11 No Internal Connection N.C. 3, 13, 14 DG407 PIN Bidirectional Output B DB 2 Positive Supply Voltage Input V+ 1 FUNCTION NAME _____________________________________________________________Pin Descriptions Vg S D V- V+ Figure 1. Overvoltage Protection Using External Blocking Diodes |
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