MAX9725 Maxim Integrated Products, MAX9725 Datasheet
MAX9725
Manufacturer Part Number
MAX9725
Description
Stereo Headphone Amplifier
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX9725.pdf
(14 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX9725CETC+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
MAX9725EEBC+TGD6
Manufacturer:
MAXIM/美信
Quantity:
20 000
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The MAX9725 fixed-gain, stereo headphone amplifier
is ideal for portable equipment where board space is at a
premium. The MAX9725 uses a unique, patented
DirectDrive
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 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 protec-
tion 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 tem-
perature 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).
19-3465; Rev 0; 11/04
*Future product—contact factory for availability.
**EP = Exposed paddle.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX9725AEBC -T*
M AX9725AE TC
MAX9725BEBC -T*
M AX9725BE TC
MAX9725CEBC-T*
M AX9725C E TC
MAX9725D EBC -T* - 40°C to + 85°C 12 U C S P- 12
M AX9725D E TC
MP3 Players
Cellular Phones
PDAs
1V, Low-Power, DirectDrive, Stereo Headphone
PA RT
TM
architecture to produce a ground-referenced
T EM P R AN G E
- 40°C to + 85°C 12 U C S P- 12
- 40°C to + 85°C 12 TQFN- EP** AAEW
- 40°C to + 85°C 12 U C S P- 12
- 40°C to + 85°C 12 TQFN- EP**
- 40°C to + 85°C 12 U C S P- 12
- 40°C to + 85°C 12 TQFN- EP**
- 40°C to + 85°C 12 TQFN- EP**
________________________________________________________________ Maxim Integrated Products
Ordering Information
General Description
Smart Phones
Portable Audio Equipment
PIN-
PA CK A G E
Applications
M A RK
AAEX
AAEY
AAEZ
AC M
T O P
AC N
AC K
AC L
G A IN
( V/V)
- 1.5
- 1.5
- 2
- 2
- 1
- 1
- 4
- 4
Amplifier with Shutdown
♦ Low Quiescent Current (2.1mA)
♦ Single-Cell, 0.9V to 1.8V Single-Supply Operation
♦ Fixed Gain Eliminates External Feedback Network
♦ Ground-Referenced Outputs Eliminate DC Bias
♦ No Degradation of Low-Frequency Response Due
♦ 20mW per Channel into 32Ω
♦ Low 0.006% THD+N
♦ High PSRR (80dB at 1kHz)
♦ Integrated Click-and-Pop Suppression
♦ Low-Power Shutdown Control
♦ Short-Circuit Protection
♦ ±8kV ESD-Protected Amplifier Outputs
♦ Available in Space-Saving Packages
Pin Configurations appear at end of data sheet.
to Output Capacitors
12-Bump UCSP (1.54mm x 2.02mm x 0.6mm)
12-Pin Thin QFN (4mm x 4mm x 0.8mm)
MAX9725A: -2V/V
MAX9725B: -1.5V/V
MAX9725C: -1V/V
MAX9725D: -4V/V
C1N
C1P
INL
INR
MAX9725
SGND
V
CHARGE PUMP
DD
INVERTING
PGND
Block Diagram
OUTL
OUTR
PV
V
SS
SS
SINGLE
1.5V CELL
AA OR AAA
BATTERY
ELIMINATE DC-BLOCKING
DirectDrive OUTPUTS
CAPACITORS.
Features
1