MAX13330

PRODUCTION

Automotive DirectDrive® Headphone Amplifiers with Output Protection and Diagnostics

Industry's First Automotive Headphone Amplifiers with Output Protection Up to 45V and Short-Circuit Diagnostics

Data Sheet (Rev. 5) Product Selection Table
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Overview

  • 4V to 5.5V Single-Supply Operation
  • 2MHz Charge Pump Prevents AM Radio Interference
  • Ground-Referenced Outputs Eliminate Bulky DC-Blocking Capacitors
  • Short-to-Ground and Battery (VBAT up to +45V) Output Protection, Load Dump Protection
  • Short-Circuit Diagnostic Output
  • Adjustable Gain (MAX13331) or Fixed -1.5V/V Gain (MAX13330)
  • 125mW per Channel into 32Ω at 0.01% THD+N
  • Integrated Click-and-Pop Suppression
  • High PSRR Eliminates LDO
  • No Degradation of Low-Frequency Response Due to Output Capacitors
  • ±15kV Human Body Model ESD Protection for Output Pins

The MAX13330/MAX13331 stereo headphone amplifiers are designed for automotive applications requiring output short-circuit and ESD protection to battery/ground with diagnostics. These devices use Maxim's unique DirectDrive® architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving board space and component height. The gain of the amplifier is set internally (-1.5V/V) on the MAX13330 or adjusted externally with resistors on the MAX13331.

The MAX13330/MAX13331 deliver 120mW per channel into a 16Ω load or 135mW into a 32Ω load and have a low 0.01% THD+N. Low output impedance and the efficient integrated charge pump allows the device to drive loads as low as 8Ω, enabling the use of small loudspeakers. An 80dB at 217Hz PSRR allows these devices to operate from noisy digital supplies without an additional linear regulator. These devices include ±15kV Human Body Model ESD protection and short-circuit protection up to +45V at the headphone outputs. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. A low-power shutdown mode reduces the supply current to 3µA (typ).

The MAX13330/MAX13331 are specified from -40°C to +105°C AEC-Q100 Level 2 automotive temperature range and are available in a 16-pin QSOP package.

Applications

  • Automotive Entertainment Systems
  • Automotive Rear Seat Entertainment Systems
MAX13330
Automotive DirectDrive® Headphone Amplifiers with Output Protection and Diagnostics
MAX13330, MAX13331: Simplified Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

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Evaluation Kits

MAX13331EVKIT

Evaluation Kit for the MAX13330 and MAX13331

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Features and Benefits

  • No DC-Blocking Capacitors Required
  • 4V to 5.5V Single-Supply Operation
  • Adjustable Gain (MAX13331 Only)
  • 125mW Per Channel into 32Ω at 0.01% THD+N
  • Shutdown Control
  • Ultra-Compact Solution
  • Low-Profile (1.2mm, max) Design
  • Lead(Pb)-Free and RoHS Compliant
  • Fully Assembled and Tested Surface-Mount Board

Product Details

The MAX13331 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX13331 DirectDrive® stereo headphone amplifier. DirectDrive eliminates the two large DC-blocking capacitors typically required between the output of the amplifier and the headphones. The MAX13331 EV kit includes two RCA phono jacks on the input and a 3.5mm headphone jack on the output to facilitate easy connections to the circuit board.

The MAX13331 EV kit can also evaluate the MAX13330 IC. This requires the IC replacement of U1.

Applications

  • Automotive Entertainment Systems
  • Automotive Rear Seat Entertainment Systems
MAX13331EVKIT
Evaluation Kit for the MAX13330 and MAX13331

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