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MAX9725AEBC Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX9725AEBC Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 14 page General Description 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 DirectDriveTM 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 MAX9725 delivers up to 20mW per channel into a 32 Ω 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). Applications Features ♦ Low Quiescent Current (2.1mA) ♦ 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 ♦ 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) 1V, Low-Power, DirectDrive, Stereo Headphone Amplifier with Shutdown ________________________________________________________________ Maxim Integrated Products 1 19-3465; Rev 0; 11/04 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. Ordering Information PART TEMP RANGE PIN- PACKAGE TOP MARK GAIN (V/V) MAX9725AEBC-T* -40 °C to +85°C 12 UCSP-12 ACK-2 MAX9725AETC -40 °C to +85°C 12 TQFN-EP** AAEW -2 MAX9725BEBC-T* -40 °C to +85°C 12 UCSP-12 ACL-1.5 MAX9725BETC -40 °C to +85°C 12 TQFN-EP** AAEX -1.5 MAX9725CEBC-T* -40 °C to +85°C 12 UCSP-12 ACM-1 MAX9725CETC -40 °C to +85°C 12 TQFN-EP** AAEY -1 MAX9725DEBC-T* -40 °C to +85°C 12 UCSP-12 ACN-4 MAX9725DETC -40 °C to +85°C 12 TQFN-EP** AAEZ -4 UCSP is a trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. *Future product—contact factory for availability. **EP = Exposed paddle. MP3 Players Cellular Phones PDAs Smart Phones Portable Audio Equipment DirectDrive OUTPUTS ELIMINATE DC-BLOCKING CAPACITORS. C1N C1P OUTL SINGLE 1.5V CELL AA OR AAA BATTERY OUTR SGND PGND MAX9725 INVERTING CHARGE PUMP INR INL VDD PVSS VSS Block Diagram |
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