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What is AS1742?

This electronic component, produced by the manufacturer "austriamicrosystems", performs the same function as "(AS1741 - AS1743) Dual SPST Analog Switches".


AS1742 Datasheet PDF - austriamicrosystems

Part Number AS1742
Description (AS1741 - AS1743) Dual SPST Analog Switches
Manufacturers austriamicrosystems 
Logo austriamicrosystems Logo 


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austriamicrosystems
AS1741, AS1742, AS1743
H i g h - Sp e e d , L o w - Vo l ta g e , S i n g l e - S u p p l y, 0 . 8,
Dual SPST Analog Switches
1 General Description
2 Key Features
Data Sheet
The AS1741/AS1742/AS1743 are high-speed, low-volt-
age, dual single-pole/single-throw (SPST) analog
switches.
Fast switching speeds, low ON-resistance, and low
power-consumption make these devices ideal for single-
cell battery powered applications.
These highly-reliable devices operate from a single +1.6
to +3.6V supply, and are differentiated by the type and
number of switches as listed in Table 1.
Table 1. Standard Products
Model
Switch Types
AS1741
Two Normally Open (NO) Switches
AS1742
Two Normally Closed (NC) Switches
AS1743
One NO Switch and One NC Switch
The AS1743 supports break-before-make switching.
With very low ON-resistance (RON), RON matching, and
RON flatness, the devices can accurately switch signals
for sample and hold circuits, digital filters, and op-amp
gain switching networks.
The AS1741/AS1742/AS1743 digital logic input is 1.8V
CMOS-compatible when using a single +3V supply, and
all devices can handle Rail-to-Rail signals.
The devices are available in an 8-pin MSOP package
and an 8-pin SOT23 package.
! ON-Resistance:
- 0.8(+3V supply)
- 2.5(+1.8V supply)
! RON Matching: 0.08(+3V supply)
! RON Flatness: 0.18(+3V supply)
! Supply Voltage Range: +1.6 to +3.6V
! Switching Action: tON = 22ns, tOFF = 14ns
! Current-Handling: 250mA Continuous
! Break-Before-Make Switching (AS1743)
! Rail-to-Rail Signal Handling
! 1.8V CMOS Logic Compatible (+3V supply)
! Total Harmonic Distortion: 0.03%
! Operating Temperature Range: -40 to +85ºC
! Package Types:
- 8-pin MSOP
- 8-pin SOT23
3 Applications
Figure 1. MSOP Block Diagrams
The devices are ideal for use in power routing systems,
cordless and mobile phones, MP3 players, CD and DVD
players, PDAs, handheld computers, digital cameras,
hard drives, and any other application where high-speed
signal switching is required.
AS1741
AS1742
AS1743
NO1
V+ NC1
V+ NO1
V+
COM1
IN1 COM1
IN1 COM1
IN1
IN2
GND
COM2
NO2
IN2
GND
COM2
NC2
IN2
GND
COM2
NC2
www.austriamicrosystems.com
Revision 1.76
1 - 15

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AS1742 equivalent
AS1741, AS1742, AS1743
Data Sheet
austriamicrosystems
6 Typical Operating Characteristics
Figure 2. Charge Injection vs. Output Voltage; SOT23
45
40
35
30
25
VDD = 3V
20
15
10 VDD = 1.8V
5
0
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3
VBIAS (V)
Figure 3. Charge Injection vs. Output Voltage; MSOP
45
40
35 VDD = 3V
30
25
20 VDD = 1.8V
15
10
5
0
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 3.3
VBIAS (V)
Figure 4. RON vs. VCOM and Temperature; VDD = 2.7V
0.50
0.45
Temp = +85ºC
0.40
0.35
Temp = +25ºC
0.30
0.25
Temp = -40ºC
0.20
0 0.5 1 1.5 2 2.5 3
VCOM (V)
Figure 5. RON vs. VCOM
1.0
0.9 VDD = 1.8V
0.8
0.7 VDD = 2V
VDD = 2.7V
0.6 VDD = 3V
0.5 VDD = 2.5V
VDD = 3.3V
0.4
0.3 VDD = 3.6V
0 0.5 1 1.5 2 2.5 3
VCOM (V)
3.5
Figure 6. tON/tOFF vs. Supply Voltage
24
22
20
18
16 tON
14
12
10
8 tOFF
6
4
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
VDD (V)
Figure 7. tON/tOFF vs. Temperature
25
20 tON/VDD = 3V
tOFF/VDD = 3V
15
tON/VDD = 1.8V
10
5
0
-40
tOFF/VDD = 1.8V
-15 10 35 60
Temperature (°C)
85
www.austriamicrosystems.com
Revision 1.76
5 - 15


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