AS1744G 查看數據表（PDF） - austriamicrosystems AG

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AS1744G

High-Speed, Low-Voltage, Dual, Single-Supply, 4Ω, SPDT Analog Switches

austriamicrosystems AG 

AS1744, AS1745

Data Sheet

Figure 8. tON/tOFF vs. Supply Voltage

40

30

20

tON

10

tOFF

0

1.5

2.5

3.5

4.5

5.5

Supply Voltage (V)

austriamicrosystems

ON-Resistance

Figure 9. Charge Injection

35

30

25

20

15

10

5

0

VDD = 3V VDD = 5V

-5

0

1

2

3

4

5

VCOM (V)

7 Detailed Description

The AS1744/AS1745 are low ON-resistance, low-voltage, dual analog SPDT switches that operate from a single +1.8

to +5.5V supply.

CMOS process technology allows switching of analog signals that are within the supply voltage range (GND to V+).

ON-Resistance

When powered from a +5V supply, the low RON (4Ω max) allows high continuous currents to be switched in a wide

range of applications. All devices have low RON flatness (1Ω, max) so they can meet or exceed the low-distortion audio

requirements of modern portable audio devices.

Bi-Directional Switching

Pins NOx, NCx, and COMx are bi-directional, thus they can be used as inputs or outputs.

Analog Signal Levels

Analog signals ranging over the entire supply voltage (V+ to GND) can be passed with very little change in ON-resis-

tance (see Typical Operating Characteristics on page 5).

Logic Inputs

The AS1744/AS1745 logic inputs (INx) can be driven up to +5.5V regardless of the supply voltage value. For example,

with a +3.3V supply, IN+ may be driven low to GND and high to +5.5V. This allows the devices to interface with +5V

systems using a supply of less than 5V.

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