Specification	MAX9725DETC+

Features	Short-Circuit Protection, Depop, Shutdown
Max Output Power x Channels @ Load	25 mW, 2
Mounting Type	Surface Mount
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-40 ¯C
Output Type	Headphones, 2-Channel (Stereo)
Package / Case	12-WQFN Exposed Pad
Supplier Device Package	12-TQFN (4x4)
Type	Class AB
Voltage - Supply [Max]	1.8 V
Voltage - Supply [Min]	0.9 V

MAX9725 Series

1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown

Part	Output Type	Type	Operating Temperature [Max]	Operating Temperature [Min]	Features	Package / Case	Max Output Power x Channels @ Load	Mounting Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package
Analog Devices Inc./Maxim Integrated MAX9725CEBC+T	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WFBGA CSPBGA	2 25 mW	Surface Mount	0.9 V	1.8 V	12-UCSP
Analog Devices Inc./Maxim Integrated MAX9725DETC+	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WQFN Exposed Pad	2 25 mW	Surface Mount	0.9 V	1.8 V	12-TQFN (4x4)
Analog Devices Inc./Maxim Integrated MAX9725DETC+T	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WQFN Exposed Pad	2 25 mW	Surface Mount	0.9 V	1.8 V	12-TQFN (4x4)
Analog Devices Inc./Maxim Integrated MAX9725BEBC+TG45	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WFBGA CSPBGA	2 25 mW	Surface Mount	0.9 V	1.8 V	12-UCSP
Analog Devices Inc./Maxim Integrated MAX9725AETC+	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WQFN Exposed Pad	2 25 mW	Surface Mount	0.9 V	1.8 V	12-TQFN (4x4)
Analog Devices Inc./Maxim Integrated MAX9725DEBC+T	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WFBGA CSPBGA	2 25 mW	Surface Mount	0.9 V	1.8 V	12-UCSP
Analog Devices Inc./Maxim Integrated MAX9725AEBC+TG45	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WFBGA CSPBGA	2 25 mW	Surface Mount	0.9 V	1.8 V	12-UCSP
Analog Devices Inc./Maxim Integrated MAX9725AEBC+T	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WFBGA CSPBGA	2 25 mW	Surface Mount	0.9 V	1.8 V	12-UCSP
Analog Devices Inc./Maxim Integrated MAX9725BETC+T	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C	Depop Short-Circuit Protection Shutdown	12-WQFN Exposed Pad	2 25 mW	Surface Mount	0.9 V	1.8 V	12-TQFN (4x4)
Analog Devices Inc./Maxim Integrated MAX9725BEBC+G45	Headphones 2-Channel (Stereo)	Class AB	85 C	-40 ¯C		12-WFBGA CSPBGA	2 25 mW	Surface Mount	0.9 V	1.8 V	12-UCSP

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	300	$ 1.55

Description

General part information

MAX9725 Series

The MAX9725A–MAX9725D fixed-gain, stereo headphone amplifiers are ideal for portable equipment where board space is at a premium. The MAX9725E offers the flexibility to adjust the gain with external input and feedback resistors. The MAX9725A–MAX9725E use a unique DirectDrive® architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. Fixed gains of -2V/V (MAX9725A), -1.5V/V (MAX9725B), -1V/V (MAX9725C), and -4V/V (MAX9725D) further reduce external component count. The adjustable gain of the MAX9725E DirectDrive headphone amplifier allows for any gain down to -1V/V using external resistors.The MAX9725 delivers up to 20mW per channel into a 32Ω load and achieves 0.006% THD+N. An 80dB at 1kHz power-supply rejection ratio (PSRR) allows the MAX9725 to operate from noisy digital supplies without an additional linear regulator. The MAX9725 includes ±8kV ESD protection on the headphone output. Comprehensive click-and-pop circuitry suppresses audible clicks and pops at startup and shutdown. A low-power shutdown mode reduces supply current to 0.6µA (typ).The MAX9725 operates from a single 0.9V to 1.8V supply, allowing the device to be powered directly from a single AA or AAA battery. The MAX9725 consumes only 2.1mA of supply current, provides short-circuit protection, and is specified over the extended -40°C to +85°C temperature range. The MAX9725 is available in a tiny (1.54mm x 2.02mm x 0.6mm) 12-bump chip-scale package (UCSP™) and a 12-pin thin QFN package (4mm x 4mm x 0.8mm).ApplicationsCell PhonesMP3 PlayersPDAsPortable Audio EquipmentSmartphones

Documents

Technical documentation and resources

MAX9725 Reliability Data

Reliability Data

Package Drawing - Thin Quad Flatpack, No Leads

Package Drawing

MAX9725: 1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown Data Sheet (Rev.4)

Data Sheet