Improved, Quad,

SPST Analog Switches

6

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__________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

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.

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

53

GND

Ground

12

10

Logic Supply Voltage

13

11

V+

Positive-Supply Voltage Input—Connected to Substrate

—

—

EP

Exposed Paddle (QFN Only). Connect EP to V+.