Dual Automotive, Audio Line Drivers with I²C Control and Diagnostic

Automotive Audio Line Drivers Reliably Transport High-Quality Analog Audio Within a Vehicle

Please check latest availability status for a specific part variant.


The MAX13325/MAX13326 dual audio line drivers provide a reliable differential interface between automotive audio components. The devices feature differential inputs and outputs, integrated output diagnostics, and are controlled using an I²C interface or operate in stand-alone mode. The outputs can deliver up to 4VRMS into 100Ω loads.

The MAX13325 buffers analog audio signals for transmission over long cable distances with a fixed gain of 12dB, whereas the MAX13326 provides a 0dB fixed gain. The diagnostics on the outputs report conditions on a per channel basis, including short to GND, short to battery, overcurrent, overtemperature, and excessive offset. The output amplifiers can drive capacitive loads up to 4nF to ground and 3nF differentially.

The outputs are protected according to IEC 61000-4-2 ±8kV Contact Discharge, and ±15kV Air Gap. The MAX13325/MAX13326 are specified from -40°C to +105°C and are available in a 28-pin TSSOP package with an exposed pad.
MAX13325, MAX13326: Typical Operating Circuit MAX13325, MAX13326: Typical Operating Circuit Enlarge+

Key Features

  • Comprehensive Programmability and Diagnostics Using I²C Interface
  • Autoretry Function in Stand-Alone Mode
  • Drive Capacitive Loads ≤ 3nF Differentially, ≤ 4nF to Ground
  • 112dB Signal-to-Noise Ratio
  • Low 0.002% THD at 4VRMS into 2.7kΩ loads
  • High PSRR (70dB at 1kHz)
  • High CMRR (80dB at 1kHz)
  • Low Output Noise (3µVRMS), MAX13326
  • Excellent Channel-to-Channel Matching
  • Load-Dump Transient Protection
  • Protected Output Against Various Short-Circuit Conditions
  • ESD Protection for ±8kV Contact Discharge, ±15kV Air Gap
  • Long-Distance Drive Capability Typically Up to 15m or Greater
  • Noise-Rejecting Differential Inputs and Outputs
  • Low-Power Shutdown Mode < 10µA
  • Hardware or Software MUTE Function
  • 28-Pin TSSOP Package with Exposed Pad


  • Automotive Radio and Rear Seat Entertainment
  • Professional Remote Audio Amplifiers

See parametric specs for Audio Amp/Line Driver/Receiver ICs (4)

Part NumberVSUPPLY
Input TypeChannelsFixed Gain
InterfaceCLOAD Drive CapabilityOper. Temp.
mintypSee Notes
MAX13325 4.5 to 18Differential212-96-80112I2C
3nF Differential
4nF to GND
-40 to +105$3.57 @1k
MAX13326 0

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX13325EVKIT: Evaluation Kit for the MAX13325 and MAX13326
Request Reliability Report for: MAX13326 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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