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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

Product Details

Key Features

Parametric specs for Headphone Amplifiers
Headphone Amplifier VCC (V) (min) 4
Headphone Amplifier VCC (V) (max) 5.5
Headphone Amplifier ICC (mA) (typ) 10
Hdph. Amp. POUT into 32Ω (mW) (@ 1% THD+N) 135
Headphone Amplifier Half-Power THD+N (%) 0.014
SNR (dB) (A- Weighted) 100
PSRR (dB) (min) 86
Headphone Amplifier External Gain No
Headphone Amplifier Fixed Gain (|V/V|) (min) 1.5
Headphone Amplifier Fixed Gain (|V/V|) (max) 1.5
Package/Pins QSOP/16
Budgetary
Price (See Notes)
2.04
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Simplified Block Diagram

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Parameters

Parametric specs for Headphone Amplifiers
Headphone Amplifier VCC (V) (min) 4
Headphone Amplifier VCC (V) (max) 5.5
Headphone Amplifier ICC (mA) (typ) 10
Hdph. Amp. POUT into 32Ω (mW) (@ 1% THD+N) 135
Headphone Amplifier Half-Power THD+N (%) 0.014
SNR (dB) (A- Weighted) 100
PSRR (dB) (min) 86
Headphone Amplifier External Gain No
Headphone Amplifier Fixed Gain (|V/V|) (min) 1.5
Headphone Amplifier Fixed Gain (|V/V|) (max) 1.5
Package/Pins QSOP/16
Budgetary
Price (See Notes)
2.04

Key Features

  • 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

Applications/Uses

  • Automotive Entertainment Systems
  • Automotive Rear Seat Entertainment Systems

Description

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.

Simplified Block Diagram

MAX13330, MAX13331: Simplified Block Diagram MAX13330, MAX13331: Simplified Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.