Datasheet > AS1702_1

AS1702_1

更新时间： 2022-12-20 06:17:07

品牌	Logo	应用领域
艾迈斯 - AMSCO		放大器功率放大器
页数	文件大小	规格书
20页	439K
描述
1.8W Single-Channel Audio Power Amplifiers

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AS1702_1 数据手册

Data Sheet

AS1702 - AS1705

1.8W Single-Channel Audio Power Amplifiers

1 General Description

2 Key Features

ꢀ

2.7 to 5.5V (VCC) Single-Supply Operation

THD+N: 1.8W into 4Ω at 1% (per Channel)

Differential Input

The AS1702 - AS1705 are single-channel differential

audio power-amplifiers designed to drive 4 and 8Ω

loads. The integrated gain circuitry of these amplifiers

and their small size make them ideal for 2.7- to 5V-pow-

ered 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 high-fidelity audio power amplification.

Adjustable Gain Option (AS1702)

The devices deliver 1.8W continuous average power per

channel to a 4Ω load with less than 1% total harmonic

distortion (plus noise), while operating from a single 2.7

to 5V supply.

Internal Fixed Gain to Reduce External Component

Count (AS1703, AS1704, AS1705)

For reduced component designs, the devices are avail-

able with different gain levels as shown in Table 1.

ꢀ

<100nA Low-Power Shutdown Mode

Click and Pop Suppression

Table 1. Standard Products

Model

AS1702

AS1703

AS1704

AS1705

Gain

Adjustable (via external components)

AV = 0dB

Pin-Compatible to National Semiconductor LM4895

(AS1705) and Maxim MAX9718A/B/C/D

AV = 3dB

ꢀ

Operating Temperature Range: -40 to +85ºC

Package Types

AV = 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 active-high or active-low. All devices contain click-

and-pop suppression circuitry that reduces audible

clicks and pops during power-up and shutdown.

- 10-pin MSOP

- 10-pin DFN

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.

The AS1702 - AS1705 are pin compatible with the

LM4895 and the MAX9718A/B/C/D. The devices are

available in a 10-pin MSOP package and a 10-pin DFN

package.

Figure 1. Simplified Block Diagram

Single Supply 2.7

to 5.5V

VCC

–

IN+

OUT+

RL = 4 or 8Ω

IN-

OUT-

AS1702/AS1703/

AS1704/AS1705

SHDN

GND

SHDM

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