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Dual Automotive Differential Audio Receivers with I²C Control and Diagnostics

Programmable Gain Audio Input Amplifiers with I²C Control and Full Automotive Grade Diagnostics Capability

Product Details

Key Features

Parametric specs for Audio Amp/Line Driver/Receiver ICs
VSUPPLY (V) 5
Input Type Differential
# Channels 2
Adjustable Gain (dB) -22 to +8
PSRR (dB) (min) -80
CMRR (dB) (typ) 85
SNR (dB) 99.4
Interface I2C
CLOAD Drive Capability 300pF
Oper. Temp. (°C) -40 to +105
Budgetary
Price (See Notes)
2.32
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Simplified Block Diagram

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Parameters

Parametric specs for Audio Amp/Line Driver/Receiver ICs
VSUPPLY (V) 5
Input Type Differential
# Channels 2
Adjustable Gain (dB) -22 to +8
PSRR (dB) (min) -80
CMRR (dB) (typ) 85
SNR (dB) 99.4
Interface I2C
CLOAD Drive Capability 300pF
Oper. Temp. (°C) -40 to +105
Budgetary
Price (See Notes)
2.32

Key Features

  • +3.3V or +5V Operation
  • +28V to -16V Tolerant Inputs
  • Wide Common-Mode Input Range (-5V to +11.5V)
  • Fully Differential Inputs Up to 7VRMS
  • Quasi-Differential Inputs Up to 3.5VRMS
  • Audio Presence Detection
  • Jack Sense Detection
  • Diagnostic Capability
  • Programmable Gain with Zero-Crossing Detection
  • I2C Control Interface
  • Automotive Grade ESD Protection
    • ISO 10605 ±15kV Air Gap
    • ±8kV Contact Discharge

Applications/Uses

  • Automotive Telematics
  • Connectivity Modules
  • Radio Head Units
  • RSA/RSE

Description

The MAX13335E/MAX13336E are high-fidelity stereo audio input amplifiers designed for automotive applications requiring audio-level detection and/or jack sensing capability.

The devices feature a dual-channel, low-noise, programmable gain amplifier that accepts fully differential and quasi-differential input signals with diagnostics capability controlled through an I²C interface. The devices' audio receiver can also pair with the MAX13325/MAX13326 audio transmitter to form a complete differential audio link in automotive systems.

Each channel of the device features high common-mode rejection ratio (CMRR) (80dB), enabling the recovery of audio signals in the presence of large common-mode noise in automotive environments. An integrated programmable gain amplifier is adjustable from -14dB to +16dB (MAX13335E) and -22dB to +8dB (MAX13336E) with zero-crossing detection to provide an optimum output-signal level and limit zip noise. The external flexible diagnostic inputs can be configured to perform jack sense functions or to detect short-to-battery, short-to-ground, open load, and shorts between channels.

The audio inputs are protected against ISO 10605 ±15kV Air Gap and ±8kV Contact Discharge ESD pulses. Both devices have a -40°C to +105°C operating temperature range, and are available in a 16-pin QSOP package.

Simplified Block Diagram

MAX13335E, MAX13336E: Typical Application Circuit MAX13335E, MAX13336E: Typical Application Circuit 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 .