AS1744, AS1745

Data Sheet

ON-Resistance

www.austriamicrosystems.com

Revision 1.53

6 - 16

Figure 9. Charge Injection

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

Ω max) allows high continuous currents to be switched in a wide

Ω, 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.

0

10

20

30

40

1.5

2.5

3.5

4.5

5.5

Supply Voltage (V)

-5

0

5

10

15

20

25

30

35

01

23

45

-5

0

5

10

15

20

25

30

35

01

23

45