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Product Detailed Parameters
- Description：IC AMP CLASS AB STER 25MW 12UCSP
- Series：DirectDrive®
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR),Bulk
- Type：Class AB
- Output Type：Headphones, 2-Channel (Stereo)
- Max Output Power x Channels @ Load：25mW x 2 @ 16Ohm
- Voltage - Supply：900mV ~ 1.8V
- Features：Depop, Short-Circuit Protection, Shutdown
- Mounting Type：Surface Mount
- Supplier Device Package：12-UCSP
- Package / Case：12-WFBGA, CSPBGA
- Operating Temperature：-40°C ~ 85°C (TA)
- Grade：-
- Qualification：-
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Overview
The MAX9725EEBC+T is a fixed-gain, stereo headphone amplifier utilizing DirectDrive architecture to eliminate DC-blocking capacitors. It operates from a single 0.9V to 1.8V supply and delivers up to 20mW per channel into a 32Ω load with 0.006% THD+N. The device features an inverting charge pump for ground-referenced outputs, ±8kV ESD protection on outputs, integrated click-and-pop suppression, and a low-power shutdown mode reducing current to 0.6µA. It is housed in a 12-bump UCSP package.
Feature Summary
- DirectDrive architecture eliminates the need for large output-coupling capacitors by generating a negative supply via an internal charge pump.
- Integrated comprehensive click-and-pop suppression circuitry minimizes audible transients during power-up and shutdown.
- Low quiescent current consumption of 2.3mA supports extended battery life in portable applications.
- Includes short-circuit protection and ±8kV human body model ESD protection on amplifier outputs.
Applications
- MP3 Players
- Cellular Phones
- PDAs
- Smart Phones
- Portable Audio Equipment
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead-free packaging specifications against the latest datasheet revisions. Ensure ordering suffixes match required package types and temperature ranges. Request batch traceability documentation for quality assurance purposes prior to final procurement commitment.
Selection Notes
Select this component for designs requiring minimal board space and elimination of bulky output capacitors. Suitable for single-cell battery operation where low voltage headroom is critical. Consider the adjustable gain variant if external feedback networks are preferred over fixed internal resistors. Verify thermal dissipation requirements relative to the specific PCB layout and ambient operating conditions.
Part Context
This part belongs to the MAX9725 family of 1V, low-power, DirectDrive stereo headphone amplifiers. The EEBC suffix indicates a specific 12-bump UCSP package configuration. Other variants in the series include fixed-gain models (A-D) and an adjustable gain version (E), all sharing the same core DirectDrive technology and low-power characteristics.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation.
FAQ
How does the DirectDrive architecture benefit the design?
It generates a ground-referenced output using an internal charge pump, eliminating the need for large DC-blocking capacitors, which saves board space and improves low-frequency response.
What is the purpose of the SHDN pin?
The SHDN pin controls the low-power shutdown mode. Driving it low disables the amplifiers and charge pump, reducing supply current to approximately 0.6µA.
Can other circuits be powered from the PVSS pin?
Yes, other devices can be powered from the internally generated negative supply (PVSS), provided the current drawn does not exceed 1mA to avoid affecting headphone driver performance.
