Features and Benefits
- 2 x 16W Output Power (RL = 4Ω, THD+N = 10%)
- High Efficiency: Up to 92% with RL = 8Ω
- Mute and Shutdown Modes
- Differential Inputs Suppress Common-Mode Noise
- Adjustable Gain
- Integrated Click-and-Pop Suppression
- Low 0.06% THD+N at 3.5W, RL = 8Ω
- Output Short-Circuit and Thermal Protection
- Available in Space-Saving, 6mm x 6mm, 36-Pin TQFN Package
The MAX9742 stereo Class D audio power amplifier delivers up to 2 x 16W into 4Ω loads. The MAX9742 features high-power efficiency (92% with 8Ω loads), eliminating the need for a bulky heatsink and conserving power. The MAX9742 operates from a 20V to 40V single supply or a ±10V to ±20V dual supply. Features include fully differential inputs, comprehensive click-and-pop suppression, low-power shutdown mode, and an externally adjustable gain. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition.
The MAX9742 is available in a thermally efficient 36-pin TQFN (6mm x 6mm x 0.8mm) package and is specified over the -40°C to +85°C extended temperature range.
- Audio Docking Stations
- CRT TVs
- Flat-Panel Display TVs
- Multimedia Monitors
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
The MAX9742 evaluation kit (EV kit) is a fully assembled and tested PCB that configures the MAX9742 Class D amplifier to drive 2 x 20W into a pair of 8Ω speakers for audio applications. The EV kit operates from a 20V to 40VDC power supply. The EV kit is configured for a +26dB gain. The MAX9742 EV kit accepts single-ended or differential input signals, and provides a pair of single-ended outputs.
The MAX9742 EV kit provides a shutdown input pad to control the shutdown mode of the MAX9742. The shutdown mode reduces power consumption and extends battery life. The EV kit also provides a mute input pad to control the mute mode of the MAX9742. The EV kit includes convenient audio input and output connectors, and the required output filters to ease evaluation.
Features & Benefits
- 20V to 40V Single DC Power-Supply Operation
- Single-Ended or Fully Differential Inputs
- Single-Ended Outputs
- Drives 2 x 20W into 8Ω Speakers at 36V
- Drives 2 x 10W into 4Ω Speakers at 24V
- Shutdown and Mute Control
- Evaluates the MAX9742 in 36-Pin TQFN-EP Package
- Fully Assembled and Tested
Documentation & Resources
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 Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|MAX9742ETX+||Material Declaration||Reliability Data||36-LFCSP-6X6X0.75|
|MAX9742ETX+T||Material Declaration||Reliability Data||36-LFCSP-6X6X0.75|
|Wafer Fabrication Data|
Sample & Buy
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.