LPA4722数据手册LPSemi中文资料规格书

描述 Description

The LPA4722 stereo headphone amplifiers are designed for portable equipment where board space is at a premium. The LPA4722 deliver up to 215mW per channel into a 16Ω load or 200mW into a 32Ω load and have low 0.01% THD+N. An 80dB at 217Hz power-supply rejection ratio (PSRR) allows these devices to operate from noisy digital supplies without an additional linear regulator. Comprehensive anticlick-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. A low-power shutdown mode reduces the supply current to 0.1μA. The LPA4722 operates from a single 2.5V to 5.5V supply, consumes only 5mA supply current, and is specified over the extended -40℃ to +85℃ temperature range. The devices are available in tiny 16-pin TQFN (3mm✕ 3mm✕0.8mm) packages.

特性 Features

· 2.5V to 5.5V Single-Supply Operation
· High PSRR (80dB at 217Hz) Eliminates LDO
· No Bulky DC-Blocking Capacitors Required
· Ground-Referenced Outputs Eliminate DC Bias Voltage on Headphone Ground Pin
· No Degradation of Low-Frequency Response Due to Output Capacitors
· Differential Inputs for Enhanced Noise Cancellation
· 194mW into 32Ω Load from 5V Power Supply at THD+N = 0.1% (TYP, per Channel)
· Low 0.003% THD+N
· Short-Circuit and Thermal-Overload Protection
· Integrated Click-and-Pop Suppression
· Low Quiescent Current (5mA at VDD = 5V)
· Shutdown Control
· Under-Voltage Lockout Function
· -40℃ to +85℃ Operating Temperature Range
· Available in a Space-Saving 16-Pin TQFN (3mm✕ 3mm✕ 0.8mm) Package

应用 Application

· MP3 Players
· Smart/Cellular Phones
· PDAs
· Portable Audio
· Notebook and Desktop PCs
· Flat-Panel Monitors