MAX9725
PRODUCTION1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown
- Part Models
- 9
- 1ku List Price
- Starting From $0.75
Part Details
- Low Quiescent Current:
- 2.1mA (MAX9725A–MAX9725D)
- 2.3mA (MAX9725E)
- Single-Cell, 0.9V to 1.8V Single-Supply Operation
- Fixed Gain Eliminates External Feedback Network
- MAX9725A: -2V/V
- MAX9725B: -1.5V/V
- MAX9725C: -1V/V
- MAX9725D: -4V/V
- Adjustable Gain with External Input and Feedback
Resistors
- MAX9725E: Minimum Stable Gain of -1V/V
- Ground-Referenced Outputs Eliminate DC Bias
- No Degradation of Low-Frequency Response Due to Output Capacitors
- 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
- 12-Bump UCSP (1.54mm x 2.02mm x 0.6mm)
- 12-Pin Thin QFN (4mm x 4mm x 0.8mm)
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).
Applications
- Cell Phones
- MP3 Players
- PDAs
- Portable Audio Equipment
- Smartphones
Documentation
Data Sheet 1
Reliability Data 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX9725AETC+ | Thin Quad Flatpack, No Leads | ||
| MAX9725AETC+T | Thin Quad Flatpack, No Leads | ||
| MAX9725BEBC+G45 | 12-WLCSP-N/A | ||
| MAX9725BEBC+TG45 | 12-WLCSP-N/A | ||
| MAX9725CEBC+TG45 | 12-WLCSP-N/A | ||
| MAX9725CETC+ | Thin Quad Flatpack, No Leads | ||
| MAX9725CETC+T | Thin Quad Flatpack, No Leads | ||
| MAX9725DETC+ | Thin Quad Flatpack, No Leads | ||
| MAX9725DETC+T | Thin Quad Flatpack, No Leads |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 20, 2016 - 1612 ASSEMBLY |
||
| MAX9725AETC+ | PRODUCTION | |
| MAX9725AETC+T | PRODUCTION | |
| MAX9725CETC+ | PRODUCTION | |
| MAX9725CETC+T | PRODUCTION | |
| MAX9725DETC+ | PRODUCTION | |
| MAX9725DETC+T | PRODUCTION | |
|
Jul 19, 2016 - 1594_AMENDED ASSEMBLY |
||
| MAX9725BEBC+TG45 | ||
|
Dec 8, 2015 - 1594_PRE-PCN WAFER FAB |
||
| MAX9725BEBC+TG45 | ||
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits
Evaluation Kit for the MAX9725A, MAX9725B, MAX9725C, MAX9725D, and MAX9725E
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