AS1749 查看數據表（PDF） - austriamicrosystems AG
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AS1749
austriamicrosystems AG
AS1749 Datasheet PDF : 17 Pages
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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
lid 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
a with headphone detection or mute/send key function.
v To reduce click-and-pop sounds when switching
between pre-charged points the AS1749 and AS1750
ill have an internal shunt switch. This shunt switch auto-
matically discharges any capacitance at the NO and NC
connection points.
t This SPDT switch is available in space-saving 10-pin
TDFN 3x3 packages and operate over the -40ºC to
AG t s +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
ams 3nAptpelicantions Figure 1. Typical Operating Circuit
co Out+
Audio
l Source 1 Out-
NC1
aNO1
nic NC2
h Out+
c Audio
Source 2 Out-
NO2
Te Mute
CMPO
The device is ideal for cell phones, PDAs and hand-held
devices, notebook computers and MP3 players.
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
1 - 16
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