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MAX336 Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX336 Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 12 page __________Applications Information Operation with Supply Voltages Other than 15V Using supply voltages less than ±15V will reduce the analog signal range. The MAX336/MAX337 switches operate with ±4.5V to ±20V bipolar supplies or with a +4.5V to +30V single supply. Connect V- to GND when operating with a single supply. Both device types can also 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 NO and COM. If power-supply sequencing is not possible, add two small 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 above V-, but does not significantly affect the devices’ low switch resistance and low leak- age characteristics. Device operation is unchanged, and the difference between V+ and V- should not exceed 44V. 16-Channel/Dual 8-Channel, Low-Leakage, CMOS Analog Multiplexers 6 _______________________________________________________________________________________ ______________________________________________________________Pin Description Vg NO COM V- V+ MAX336 MAX337 Figure 1. Overvoltage Protection Using External Blocking Diodes 3, 13, 14 PIN 27 27 V- MAX336 MAX337 NAME Negative Supply-Voltage Input. Connect to GND for single-supply operation. FUNCTION 1 28 V+ — Positive Supply-Voltage Input 2, 3, 13 1 N.C. COM No Internal Connection — 2 COMB Analog Signal Output* (bidirectional) Analog Signal B Output* (bidirectional) N.C. — No Internal Connection 28 — 4–11 NO8B–NO1B COMA Analog Signal B Inputs* (bidirectional) 12 12 GND Analog Signal A Output* (bidirectional) Logic Ground 14–17 — A3–A0 Logic Address Inputs — 15, 16, 17 A2, A1, A0 Logic Address Inputs 18 18 EN Logic Enable Input 19–26 — NO1–NO8 Analog Signal Inputs* (bidirectional) — 19–26 NO1A–NO8A Analog Signal A Inputs* (bidirectional) * Analog signal inputs and outputs are names of convenience only; they are identical and interchangeable. 4–11 — NO16-NO9 Analog Signal Inputs* (bidirectional) |
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