MAX9708ETN+D by Analog Devices

20W/40W, Filterless, Spread-Spectrum, Mono/Stereo, Class D Amplifier


The MAX9708 mono/stereo, Class D audio power amplifier delivers up to 2 x 21W into an 8Ω stereo mode and 1 x 42W into a 4Ω load in mono mode while offering up to 87% efficiency. The MAX9708 provides Class AB amplifier performance with the benefits of Class D efficiency, eliminating the need for a bulky heatsink and conserving power. The MAX9708 operates from a single +10V to +18V supply, driving the load in a BTL configuration. The MAX9708 offers two modulation schemes: a fixed-frequency modulation (FFM) mode, and a spread-spectrum modulation (SSM) mode that reduces EMI-radiated emissions. The MAX9708 can be synchronized to an external clock from 600kHz to 1.2MHz. A synchronized output allows multiple units to be cascaded in the system. Features include fully differential inputs, comprehensive click-and-pop suppression, and four selectable-gain settings (22dB, 25dB, 29.5dB, and 36dB). A pin-programmable thermal flag provides seven different thermal warning thresholds. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9708 is available in a 56-pin TQFN (8mm x 8mm x 0.8mm) package and is specified over the extended -40°C to +85°C temperature range.

Where to Buy

Prices starting from US$2.91

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Farnell
from US$2.91
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Analog Devices
from US$7.94
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Newark Electronics
from US$12.19
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element14
from US$10.38
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Features

2 x 21W Output Power in Stereo Mode (8Ω, THD = 10%)
1 x 42W Output Power in Mono Mode (4Ω, THD = 10%)
High Efficiency: Up to 87%
Filterless Class D Amplifier
Unique Spread-Spectrum Mode
Programmable Gain (+22dB, +25dB, +29.5dB, +36dB)
High PSRR (90dB at 1kHz)
Differential Inputs Suppress Common-Mode Noise
Shutdown and Mute Control
Integrated Click-and-Pop Suppression
Low 0.1% THD+N
Current Limit and Thermal Protection
Programmable Thermal Flag
SYNC Input/Output
Available in Thermally Efficient, Space-Saving 56-Pin TQFN Package

Specifications

# Channels 2
Class D
Spkr. Amp. VCC (V) (min) 10
Spkr. Amp. VCC (V) (max) 18
Spkr. Amp. ICC (mA) (typ) 20
POUT into 4Ω @ 1% THD+N (W) (min) 32
POUT into 4Ω @ 10% THD+N (W) (min) 42
POUT into 8Ω @ 1% THD+N (W) (min) 16
POUT into 8Ω @ 10% THD+N (W) (min) 21
Spkr. Amp. Half Pwr. THD+N (%) 0.15
SNR (dB) (A- Weighted) 95
PSRR (dB) (min) 90
Package/Pins TQFN/56
BudgetaryPrice (See Notes) 5.49


MAX9708ETN+D Amplifiers & Comparators by Analog Devices

AUDIO AMP CLASS D 21W TQFN-56

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Amplifier Class D
No. of Channels 2 Channel, 2Channels
Output Power 21W
Supply Voltage Range 10V to 18V
Amplifier Case Style TQFN
No. of Pins 56Pins
Load Impedance 8ohm
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 3 - 168 hours
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

20W/40W, Filterless, Spread-Sp | Analog Devices
Audio Amp, Class D, 21W, Tqfn-56 | Newark Electronics
AUDIO AMP, CLASS D, 21W, TQFN-56 | element14
CLASS D AMP, 20W/40W, MONO, 56TQFN | Farnell

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX9708ETN+D ?

Additional datasheets, footprints and schematics for MAX9708ETN+D are listed on our Part Details page. You can also find images and similar parts to MAX9708ETN+D on this page.

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Is the MAX9708ETN+D RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX9708ETN+D have stock available?

Authorised distributors including Analog Devices, Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX9708ETN+D .

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