MAX13325

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 4VRMinto 100I loads. The outputs are protected according to IEC 61000-4-2 Q8kV Contact Discharge, and Q15kV 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. 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 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 output amplifiers can drive capacitive loads up to 4nF to ground and 3nF differentially.

The features of MAX13325 can be summarized as (1)comprehensive programmability and diagnostics using I2C interface; (2)autoretry function in stand-alone mode; (3)drive capacitive loads 3nF differentially, 4nF to ground; (4)112dB signal-to-noise ratio; (5)low 0.002% THD at 4VRMB into 2.7k loads; (6)high PSRR (70dB at 1kHz); (7)high CMRR (80dB at 1kHz); (8)low output noise (3VRMS), MAX13326; (9)excellent channel-to-channel matching; (10)load-dump transient protection; (11)protected output against various short-circuit conditions; (12)ESD protection for ±8kV contact discharge, ±15kV air gap; (13)long-distance drive capability typically up to 15m or greater; (14)noise-rejecting differential inputs and outputs; (15)low-power shutdown mode < 10A; (16)hardware or software MUTE function; (17)28-pin TSSOP package with exposed pad.

The absolute maximum ratings of MAX13325 are (1)VDD to PGND: -0.3V to +28V; (2)CHOLD: -0.3V to +28V; (3)VL to GND: -0.3V to +6V; (4)GND, PGND: -0.3V to +0.3V; (5)OUT_ to PGND: -0.3V to 28V; (6)IN_, BIAto AGND: -0.3V to (VDD + 0.3V); (7)SCL, SDA, ADD0, ADD1, MUTE, SHDN, FLAG to GND: -0.3V to +6V; (8)OUT_ short circuit to PGND or VDD: continuous; (9)short circuits between any OUT_: continuous; (10)continuous power dissipation (TA = +70°C)(multilayer board)28-pin TSSOP (derate 27mW/°C above +70°C): 2162.2mW; (11)junction-to-ambient thermal resistance (JA): 37°C/W; (12)operating temperature range: -40°C to +105°C; (13)storage temperature range: -65°C to +150°C; (14)junction temperature: +150°C; (15)lead temperature (soldering, 10s): +300°C; (16)soldering temperature (reflow): +260°C.