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AS1749 PDF даташит

Спецификация AS1749 изготовлена ​​​​«austriamicrosystems» и имеет функцию, называемую «Audio Clickless Switches».

Детали детали

Номер произв AS1749
Описание Audio Clickless Switches
Производители austriamicrosystems
логотип austriamicrosystems логотип 

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AS1749 Даташит, Описание, Даташиты
Datasheet
AS1747, AS1748, AS1749, AS1750
L o w - Vo l ta g e , D u a l S P D T, Au d i o C l i c k l e s s S w i t c h e s w i t h
Negative Rail Capability
1 General Description
2 Key Features
The SPDT (single-pole/double-throw) switches AS1747,
AS1748, AS1749 and AS1750 allow signals below
ground to pass through without distortion. These analog
switches are ideal for switching audio signals, due to
their supply voltage from +1.8V to +5.5V and their low
0.4Ω on-resistance.
An included comparator offers the AS1748 and AS1750
with headphone detection or mute/send key function.
To reduce click-and-pop sounds when switching
between pre-charged points the AS1749 and AS1750
have an internal shunt switch. This shunt switch auto-
matically discharges any capacitance at the NO and NC
connection points.
This SPDT switch is available in space-saving 10-pin
TDFN 3x3 packages and operate over the -40ºC to
+85ºC extended temperature range.
! Distortion -Free Negative Signal Throughput Down
to VCC - 5.5V
! Comparator for Headphone or Mute Detection
(AS1748/AS1750)
! Internal Shunt Resistor Reduces Click/Pop
(AS1749/AS1750)
! Low On-Resistance (RON)
0.4Ω at +2.7V Supply
! 0.25Ω On-Resistance Flatness
! 0.03Ω On-Resistance Matching
! +1.8V to +5.5V Supply Voltage
! -90dB Crosstalk (100kHz)
! -65dB Off-Isolation (100kHz)
! 0.01% Total Harmonic Distortion
! Available in 10-pin TDFN 3x3, 16-pin TQFN 3x3,
and 12-Bump WL-CSP Packages
3 Applications
The device is ideal for cell phones, PDAs and hand-held
devices, notebook computers and MP3 players.
Figure 1. Typical Operating Circuit
Out+
Audio
Source 1 Out-
NC1
NO1
NC2
Out+
Audio
Source 2 Out-
NO2
Mute
CMPO
Shunt
Switch
COM1
IN1
Input
Select
8Ω
Speaker
IN2
COM2
V+
V+/3
+
-
CMP-
Mute
Button
www.austriamicrosystems.com/Analog-Switches/AS1747-50
Revision 1.02
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AS1749 Даташит, Описание, Даташиты
AS1747, AS1748, AS1749, AS1750
Datasheet - Pinout
4 Pinout
Pin Assignment
Figure 2. Pin Assignments (Top View) for AS1747/AS1749
VCC 1
NO1 2
COM1 3
NC1 4
IN1 5
10 NO2
9 COM2
8 NC2
7 IN2
6 GND
Pin Description
Table 1. Pin Description for AS1747/AS1749
Pin Name
VCC
NO1
COM1
NC1
IN1
GND
IN2
NC2
COM2
NO2
EP
TDFN
Description
1 Positive-Supply Voltage Input
2 Analog Switch 1 - Normally Open Terminal
3 Analog Switch 1 - Common Terminal
4 Analog Switch 1 - Normally Closed Terminal
5
Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects
COM1 to NC1 and a logic HIGH connects COM1 to NO1.
6 Ground
Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects
7 COM2 to NC2 and a logic HIGH connects COM2 to N02.
8 Analog Switch 2 - Normally Closed Terminal
9 Analog Switch 2 - Common Terminal
10 Analog Switch 2 - Normally Open Terminal
EP (TDFN only) Exposed pad for TDFN package. Connect to GND.
www.austriamicrosystems.com/Analog-Switches/AS1747-50
Revision 1.02
2 - 16









No Preview Available !

AS1749 Даташит, Описание, Даташиты
AS1747, AS1748, AS1749, AS1750
Datasheet - Pinout
Pin Assignment
Figure 3. Pin Assignments (Top View) for AS1748/AS1750
NO1
12
VCC CMPO
11 10
COM1 1
9 NO2
NC1 2
IN1 3
+
V+/3
8 COM2
7 NC2
45
CMP- GND
6
IN2
Pin Description
Table 2. Pin Description for AS1748/AS1750
Pin Name
COM1
NC1
IN1
CMP-
GND
IN2
NC2
COM2
NO2
CMPO
VCC
NO1
EP
TQFN
1
2
3
4
5
6
7
8
9
10
11
12
EP
Description
Analog Switch 1 - Common Terminal
Analog Switch 1 - Normally Closed Terminal
Digital Control Input for Analog Switch 1. A logic LOW on IN1 connects
COM1 to NC1 and a logic HIGH connects COM1 to NO1.
Comparator Inverting Input
Ground
Digital Control Input for Analog Switch 2. A logic LOW on IN2 connects
COM2 to NC2 and a logic HIGH connects COM2 to NO2.
Analog Switch 2 - Normally Closed Terminal
Analog Switch 2 - Common Terminal
Analog Switch 2 - Normally Open Terminal
Comparator Output
Positive-Supply Voltage Input
Analog Switch 1 - Normally Open Terminal
Exposed pad. Connect to GND.
www.austriamicrosystems.com/Analog-Switches/AS1747-50
Revision 1.02
3 - 16










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