EVALUATION KIT AVAILABLE MAX13325/MAX13326 Dual Automotive, Audio Line Drivers 2 with I C Control and Diagnostic General Description Features S Comprehensive Programmability and Diagnostics The MAX13325/MAX13326 dual audio line drivers provide 2 Using I C Interface a reliable differential interface between automotive audio components. The devices feature differential inputs and S Autoretry Function in Stand-Alone Mode outputs, integrated output diagnostics, and are controlled S Drive Capacitive Loads 3nF Differentially, 4nF 2 using an I C interface or operate in stand-alone mode. to Ground The outputs can deliver up to 4V into 100I loads. RMS S 112dB Signal-to-Noise Ratio The MAX13325 buffers analog audio signals for trans- S Low 0.002% THD at 4V into 2.7kI Loads RMS mission over long cable distances with a fixed gain of S High PSRR (70dB at 1kHz) 12dB, whereas the MAX13326 provides a 0dB fixed gain. The diagnostics on the outputs report conditions S High CMRR (80dB at 1kHz) on a per channel basis, including short to GND, short S Low Output Noise (3V ), MAX13326 RMS to battery, overcurrent, overtemperature, and excessive S Excellent Channel-to-Channel Matching offset. The output amplifiers can drive capacitive loads up to 4nF to ground and 3nF differentially. S Load-Dump Transient Protection S Protected Output Against Various Short-Circuit The outputs are protected according to IEC 61000-4-2 Conditions Q8kV Contact Discharge, and Q15kV Air Gap. The MAX13325/MAX13326 are specified from -40NC to S ESD Protection for 8kV Contact Discharge, +105NC and are available in a 28-pin TSSOP package 15kV Air Gap with an exposed pad. S Long-Distance Drive Capability Typically Up to 15m or Greater Applications S Noise-Rejecting Differential Inputs and Outputs Automotive Radio and Rear Seat Entertainment S Low-Power Shutdown Mode < 10A Professional Remote Audio Amplifiers S Hardware or Software MUTE Function S 28-Pin TSSOP Package with Exposed Pad Typical Operating Circuit Ordering Information V SUP +12V C1 PIN- GAIN D2** * OPTIONAL 470nF PART TEMP RANGE +5V C2 R1 Q1 PACKAGE (dB) 1F 1kI C6 VL CP CM CHOLD -40NC to 100nF D1 MAX13325GUI/V+ 28 TSSOP-EP* 12 ADD1 +105NC VDD ADD0 CHARGE C3 PUMP 1F -40NC to PGND SDA MAX13326GUI/V+ 28 TSSOP-EP* 0 2 I C INTERFACE +105NC SCL AND C4 DIGITAL CONTROL FLAG BIAS 10F TO /V denotes an automotive qualified part. MICROPROCESSOR C5 SHDN BIAS CSS 220nF +Denotes a lead(Pb)-free/RoHS-compliant package. MUTE GND *EP = Exposed pad. C7 2.2F 1nF INLP OUTLP FROM AUDIO LEFT 1nF SOURCE INLM OUTLM C8 2.2F OUTPUT ESD 1nF DIAGNOSTIC PROTECTION C9 2.2F 1nF OUTRP INRP FROM AUDIO RIGHT 1nF SOURCE OUTRM INRM C10 2.2F MAX13325 1nF MAX13326 *OPTIONAL : NEEDED FOR AUTOMOTIVE LOAD DUMP PROTECTION ONLY **USE D2 WHEN CHARGE PUMP IS OFF AND EXTERNAL SUPPLY IS PROVIDED TO C HOLD For pricing, delivery, and ordering information, please contact Maxim Direct 19-5136 Rev 5 4/13 at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com.MAX13325/MAX13326 Dual Automotive, Audio Line Drivers 2 with I C Control and Diagnostic ABSOLUTE MAXIMUM RATINGS V to PGND ........................................................-0.3V to +28V Short Circuits Between Any OUT ............................Continuous DD CHOLD .................................................................-0.3V to +28V Continuous Power Dissipation (T = +70NC) (multilayer board) A V to GND ...............................................................-0.3V to +6V 28-Pin TSSOP (derate 27mW/NC above +70NC) .....2162.2mW L Operating Temperature Range ........................ -40NC to +105NC GND, PGND ........................................................-0.3V to +0.3V OUT to PGND ........................................................ -0.3V to 28V Storage Temperature Range ............................ -65NC to +150NC Junction Temperature .....................................................+150NC IN , BIAS to AGND ..................................-0.3V to (V + 0.3V) DD SCL, SDA, ADD0, ADD1, MUTE, SHDN, Lead Temperature (soldering, 10s) ................................+300NC Soldering Temperature (reflow) ......................................+260NC FLAG to GND ..........................................................-0.3V to +6V OUT Short Circuit to PGND or V .........................Continuous DD Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. PACKAGE THERMAL CHARACTERISTICS (Note 1) Junction-to-Ambient Thermal Resistance (q ) ..........37C/W JA Junction-to-Case Thermal Resistance (q ) .................2C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. ELECTRICAL CHARACTERISTICS (V = 14.4V, V = 5V, R = J, load impedance from OUT + to OUT -, T = T = -40NC to +105NC, typical values are T = +25NC, DD L L A J A unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AMPLIFIER DC CHARACTERISTICS Transient Supply Voltage Using external nMOS-RTR020N05, 300ms V 50 V DDMAX (Load Dump) duration V 4.5 18 DD Operating Supply Voltage Range V V 2.7 5.5 L V OVLO Threshold V Rising edge 18.5 19.2 V DD DDOV V UVLO Threshold V Falling edge 3.3 3.5 V DD DDUV V UVLO Threshold V Falling edge 2.2 2.4 V L LUV T = +25NC, no load 39 mA A Supply Current I DD T = -40NC to +105NC, no load 50 mA A Logic Supply Current I V = 5V 1.7 mA L L T = +25NC 0.5 10 A I FA DD Shutdown Supply Current I T = -40NC to +105NC 0.5 SHDN A I < 0.1 2 FA L Turn-On Time (from Shutdown) MUTE = V 220 ms L Turn-On Time (from Mute) SHDN = V , C = 220nF 6 ms L CSS Differential Input Resistance R Measure across input 18 24 30 kI INDIF Each input to ground (MAX13325) 15 20 25 Single-Ended Input Impedance R kI IN Each input to ground (MAX13326) 12 16 20 MAX13325 11.8 12 12.2 Signal-Path Gain (Note 3) A dB V MAX13326 -0.2 0 +0.2 2 Maxim Integrated