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DG412AK Datasheet(PDF) 6 Page - Maxim Integrated Products |
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DG412AK Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 12 page Improved, Quad, SPST Analog Switches 6 _______________________________________________________________________________________ __________Applications Information Operation with Supply Voltages Other Than 15V Using supply voltages other than 15V will reduce the analog signal range. The DG411/DG412/DG413 switch- es operate with ±4.5V to ±20V bipolar supplies or with a +10V to +30V single supply; connect V- to 0V when operating with a single supply. Also, all device types can operate with unbalanced supplies such as +24V and -5V. VL must be connected to +5V to be TTL com- patible, or to V+ for CMOS-logic level inputs. The Typical Operating Characteristics graphs show typical on-resistance with ±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, followed by VL, V-, and logic inputs. If power-supply sequencing is not possi- ble, add two small, external signal diodes in series with supply pins for overvoltage protection (Figure 1). Adding diodes reduces the analog signal range to 1V below V+ and 1V below V-, without affecting low switch resistance and low leakage characteristics. Device operation is unchanged, and the difference between V+ and V- should not exceed +44V. V+ S V- D Vg V+ V- Figure 1. Overvoltage Protection Using External Blocking Diodes Pin Description PIN DIP/SO/TSSOP QFN NAME FUNCTION 1, 16, 9, 8 15, 14, 7, 6 IN1–IN4 Input 2, 15, 10, 7 16, 13, 8, 5 D1–D4 Analog Switch Drain Terminal 3, 14, 11, 6 1, 12, 9, 4 S1–S4 Analog Switch Source Terminal 4 2 V- Negative-Supply Voltage Input 5 3 GND Ground 12 10 VL Logic Supply Voltage 13 11 V+ Positive-Supply Voltage Input—Connected to Substrate — — EP Exposed Paddle (QFN Only). Connect EP to V+. |
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