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AS1702-T Datasheet

  • AS1702-T

  • 1.6W Single-Channel Audio Power Amplifiers

  • 13頁

  • AMSCO

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a us t ria
m i c r o
s y s t e m s
AS1702, AS1703, AS1704, AS1705
1.6W Single-Channel Audio Power Amplifiers
D a ta S he e t
1 General Description
The AS1702, AS1703, AS1704, and AS1705 are single-
channel differential audio power-amplifiers designed to
drive 4 and 8鈩?loads. The integrated gain circuitry of
these amplifiers and their small size make them ideal for
2.7- to 5V-powered portable audio devices.
The differential input design improves noise rejection
and provides common-mode rejection. A bridge-tied
load (BTL) design minimizes external component count,
while providing Hi-Fi audio power amplification.
The devices deliver 1.6W continuous average power per
channel to a 4鈩?load with less than 1% total harmonic
distortion (plus noise), while operating from a single 2.7
to 5V supply.
In order to facilitate reduced component designs, the
devices are available with different gain levels:
!
!
!
!
2 Key Features
!
2.7 to 5.5V (V
CC
) Single-Supply Operation
THD+N: 1.6W into 4鈩?at 1% (per Channel)
Differential Input
Adjustable Gain Option (AS1702)
Internal Fixed Gain to Reduce External Component
Count (AS1703, AS1704, AS1705)
<100nA Low-Power Shutdown Mode
Click and Pop Suppression
Pin-Compatible National Semiconductor LM4895
(AS1705) and Maxim MAX9718A/B/C/D
Operating Temperature Range: -40 to +85擄C
Low-Cost MSOP-10 Package
!
!
!
!
!
!
AS1702 鈥?Adjustable Gain (via external components)
AS1703 鈥?A
V
= 0dB
AS1704 鈥?A
V
= 3dB
AS1705 鈥?A
V
= 6dB
!
!
!
Integrated shutdown circuitry disables the bias genera-
tor and amplifiers, and reduces quiescent current con-
sumption to less than 100nA. The shutdown input can
be set as active-high or active-low. All devices contain
comprehensive click-and-pop suppression circuitry that
reduces audible clicks and pops during power-up and
shutdown.
The AS1702, AS1703, AS1704, and AS1705 are pin
compatible with the LM4895 and the MAX9718A/B/C/D.
The devices are available in a 10-pin MSOP package.
Figure 1. Simplified Block Diagram
3 Applications
The devices are ideal as audio front-ends for battery
powered audio devices such as MP3 and CD players,
mobile phones, PDAs, portable DVD players, and any
other hand-held battery-powered device.
Single Supply
2.7 to 5.5V
IN+
+
OUT+
IN-
鈥?/div>
OUT-
R
L =
4 or 8鈩?/div>
SHDN
SHDM
AS1702, AS1703,
AS1704, AS1705
GND
www.austriamicrosystems.com
Revision 1.01
1 - 13

AS1702-T 產(chǎn)品屬性

  • AS1702-05

  • 2,500

  • 集成電路 (IC)

  • 線性 - 音頻放大器

  • -

  • AB 類

  • 1-通道（單聲道）

  • 1.8W x 1 @ 4 歐姆

  • 2.7 V ~ 5.5 V

  • 消除爆音，差分輸入，短路和熱保護，關(guān)閉

  • 表面貼裝

  • 10-MSOP

  • 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）

  • 帶卷 (TR)

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