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MAX9722

5V, Differential Input, DirectDrive, 130mW Stereo Headphone Amplifiers with Shutdown

Next-Generation DirectDrive Headphone Amplifiers Offer Differential Inputs and 5V Operation

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX9722A/MAX9722B stereo headphone amplifiers are designed for portable equipment where board space is at a premium. The MAX9722A/MAX9722B use a unique DirectDrive® architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, which saves cost, board space, and component height. Additionally, the gain of the amplifier is set internally (-2V/V, MAX9722B) or adjusted externally (MAX9722A). The MAX9722A/MAX9722B deliver up to 70mW per channel into a 16Ω load or 130mW into a 32Ω load and have low 0.009% 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. The MAX9722A/MAX9722B include ±8kV ESD protection on the headphone outputs. 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 MAX9722A/MAX9722B operate from a single 2.4V to 5.5V supply, consume only 5.5mA of supply current, feature short-circuit and thermal-overload protection, and are specified over the extended -40°C to +85°C temperature range. The devices are available in tiny 16-pin thin QFN (3mm x 3mm x 0.8mm) and 16-pin TSSOP packages.

Data Sheet

Download	Rev 2	(PDF, 520kB)
E-Mail

An evaluation kit is available: MAX9722AEVKIT

Key Features

2.4V 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
Adjustable Gain (MAX9722A) or Fixed -2V/V Gain (MAX9722B)
130mW per Channel into 32Ω
Low 0.009% THD+N
Integrated Click-and-Pop Suppression
Low Quiescent Current (5.5mA)
Short-Circuit and Thermal-Overload Protection
±8kV ESD-Protected Amplifier Outputs (Human Body Model)
Available in a Space-Saving 16-Pin Thin QFN (3mm x 3mm x 0.8mm) Package

Applications/Uses

Cell Phones
Flat-Panel Monitors
MP3 Players
Notebook and Desktop PCs
PDAs
Portable Audio Equipment
Smartphones

Key Specifications:

Headphone Amplifiers

Part Number

Hdph. Amp. V_CC
(V)

Hdph. Amp. I_CC
(mA)

Hdph. Amp. P_OUT into 32Ω
(mW)

Hdph. Amp. Half Pwr. THD+N
(%)

SNR
(dB)

PSRR
(dB)

Hdph. Amp. Ext. Gain

Hdph. Amp. Fxd. Gain
(|V/V|)

Features

Industry Qualified

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

min

max

typ

@ 1% THD+N

A- Weighted

min

max

max w/pins

See Notes

MAX9722

2.4

5.5

130

0.015

103

Yes

Common-Mode Sense

Automotive - AECQ100

Automotive - General

TQFN/16

TSSOP/16

33.4

$0.49 @1k

See All Headphone Amplifiers (18)

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 prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Application Circuit

Product Guides

Amplifiers and Comparators (PDF)

Audio (PDF)

Reliability Reports

Reliability Report:	MAX9722.pdf
Show FIT data for:
Request Reliability Report for:

Software/Models

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Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9722AETE			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX9722AETE+			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722AETE+T			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722AETE-T			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX9722AEUE+			Active	TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722AEUE+T			Active	TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722BETE			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX9722BETE+			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722BETE+T			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633+4*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722BETE-T			Active	TQFN;16 pin;9.6 mm² Outline Drawing:21-0136 (PDF) Land Pattern: 90-0031 (PDF) Use pkgcode/variation: T1633-4*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX9722BEUE+			Active	TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX9722BEUE+T			Active	TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

MAX9722AEVKIT

Evaluation Kit for the MAX9722A and MAX9722B

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