MAX9719

Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers

Low-Cost, Mono/Stereo, 1.4W Differential Audio Power Amplifiers Ideal for Portable Audio Devices with Internal Speakers


Please check latest availability status for a specific part variant.

Description

The MAX9718/MAX9719 differential input audio power amplifiers are ideal for portable audio devices with internal speakers. The differential input structure improves noise rejection and provides common-mode rejection. A bridge-tied load (BTL) architecture minimizes external component count, while providing high-quality, power audio amplification. The MAX9718 is a single-channel amplifier while the MAX9719 is a dual-channel amplifier for stereo systems. Both devices deliver 1.4W continuous average power per channel to a 4Ω load with less than 1% THD+N while operating from a single +5V supply. The devices are available as adjustable gain amplifiers or with internally fixed gains of 0dB, 3dB, and 6dB to reduce component count.

A shutdown input disables the bias generator and amplifiers and reduces quiescent current consumption to less than 100nA. The MAX9718 shutdown input can be set as active high or active low. These devices feature Maxim's comprehensive click-and-pop suppression circuitry that reduces audible clicks and pops during startup and shutdown.

The MAX9718 is pin compatible with the LM4895, and is available in 9-bump UCSP™, 10-pin TDFN, and 10-pin µMAX® packages. The MAX9719 is available in 16-pin TQFN, 16-pin TSSOP, and 16-bump UCSP packages. Both devices operate over the -40°C to +85°C extended temperature range.
MAX9718, MAX9719: Block Diagram MAX9718, MAX9719: Block Diagram Enlarge+

Key Features

  • 2.7V to 5.5V Single-Supply Operation
  • Very High -93dB PSRR at 217Hz
  • 1.4W into 4Ω at 1% THD+N (per Channel)
  • Differential Input
  • Internal Fixed Gain to Reduce Component Count
  • Adjustable Gain Option (MAX9718A/H/MAX9719A)
  • 100nA Low-Power Shutdown Mode
  • No Audible Clicks or Pops at Power-Up/Down
  • Improved Performance Pin-Compatible Upgrade to LM4895 (MAX9718D/G)
  • 1.8V Logic Compatible

Applications/Uses

  • Mobile Phones
  • PDAs
  • Portable Devices
Part NumberClassSpkr. Amp. VCC
(V)
Spkr. Amp. VCC
(V)
Spkr. Amp. ICC
(mA)
POUT into 4Ω @ 1% THD+N
(W)
POUT into 4Ω @ 10% THD+N
(W)
POUT into 8Ω @ 1% THD+N
(W)
POUT into 8Ω @ 10% THD+N
(W)
Spkr. Amp. Half Pwr. THD+N
(%)
SNR
(dB)
PSRR
(dB)
Package/PinsBudgetary
Price
minmaxtypminminminminA- WeightedminSee Notes
MAX9718 AB2.75.551.41.71.11.30.02510793
TDFN-EP/10
UCSP/9
uMAX/10
$0.36 @1k
MAX9719 
THIN QFN/16
TQFN/16
UCSP/13
UCSP/16
$0.50 @1k
See All Speaker Amplifiers (32)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX9718AEVKIT: Evaluation Kit for the MAX9718A, MAX9718B, MAX9718C, and MAX9718D

Technical Documents

Tutorial 4691 Introduction to Hearing Aids and Important Design Considerations
App Note 3924 Thermal Considerations for a UCSP Package

Quality and Environmental Data

Request Reliability Report for: MAX9719 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX9719AEBE+
  • MAX9719AEBE+T
  • MAX9719AETE+
  • MAX9719AETE+T
  • MAX9719CETE+
  • MAX9719DEBE+
  • MAX9719DEBE+G45
  • MAX9719DEBE+T
  • MAX9719DEBE+TG45
  • MAX9719DETE+
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

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