MAX13325_12 Datasheet, PDF (9/21 Pages) Maxim Integrated Products – Dual Automotive, Audio Line Drivers with I2C Control and Diagnostic

MAX13325/MAX13326
Dual Automotive, Audio Line Drivers
with I²C Control and Diagnostic
Pin Description (continued)
PIN
NAME
FUNCTION
14
ADD0
I²C Address Inputs. Connect ADD0 and ADD1 to VL, GND, SCL, or SDA to select 7 I²C addresses.
Connect ADD0 and ADD1 to GND for stand-alone mode.
15
SCL
Serial Clock
16
SDA
Serial-Data IO
17
ADD1
I²C Address Inputs. Connect ADD0 and ADD1 to VL, GND, SCL, or SDA to select 7 I²C addresses.
Connect ADD0 and ADD1 to GND for stand-alone mode.
18
GND
Analog Ground. Ground connection for the input bias and gain circuits.
19
OUTRM Right Audio Negative Output. Each output is current limited.
20
OUTRP Right Audio Positive Output . Each output is current limited.
21
PGND
Power Ground. Ground connection for the output stage drivers.
22
CHOLD
Charge-Pump Output (When Charge Pump is On; CPOFF = 0). When the charge pump is off,
provide an external supply through a diode to the CHOLD input. Bypass CHOLD with 1µF to PGND.
23
OUTLM Left Audio Negative Output. Each output is current limited.
24
OUTLP Left Audio Positive Outputs. Each output is current limited.
25
CP
Charge-Pump Flying Capacitor, Positive Connection
26
CM
Charge-Pump Flying Capacitor, Negative Connection
27
FLAG
Open-Drain Fault Flag Output. FLAG indicates a fault on any one channel. In stand-alone mode,
FLAG is stretched to a typical pulse width of 100ms.
28
CSS
Soft-Start Capacitor Connection. CSS is charged/discharged by < 100FA current to get soft mute/
play transition. Bypass to GND through a 220nF capacitor.
—
EP
Exposed Pad. Connect to PGND.
Detailed Description
The MAX13325/MAX13326 audio line drivers are designed
to transmit audio data across noisy environments. The dif-
ferential interface is highly resistant to noise injection from
external sources common to automotive applications.
The MAX13325/MAX13326 operate in stand-alone or
I²C-compatible mode with diagnostic outputs capable
of detecting short to GND or battery, overcurrent, over-
temperature, or excessive offset. A short across another
audio output signal line is also protected.
Table 1. Register Address Map
ADDRESS
0x00
0x01
0x02
0x03
0x04
REGISTER TYPE
Configuration
Command Byte
General Fault
Left-Channel Fault
Right-Channel Fault
0x05
Flag
0x06
0x07
0x08
General Mask
Left-Channel Mask
Right-Channel Mask
NAME
CONFIG
CMD
GFAULT
LFAULT
RFAULT
FLAG
GMASK
LMASK
RMASK
READ/WRITE
Read/Write
Read/Write
Read
Cleared on Read
Cleared on Read
Read
Read/Write
Read/Write
Read/Write
DEFAULT
0x00
0x00
0x00
0x00
0x00
0x04 (12dB)
0x05 (0dB)
0x00
0x00
0x00
Maxim Integrated
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