Datasheet

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MAX13335E/MAX13336E

Dual Automotive Differential Audio Receivers

with I

C Control and Diagnostics

Typical Application Circuits

19-6168; Rev 1; 7/12

General Description

The MAX13335E/MAX13336E are high-fidelity stereo

audio input amplifiers designed for automotive applica-

tions requiring audio-level detection and/or jack sensing

capability.

The devices feature a dual-channel, low-noise, program-

mable gain amplifier that accepts fully differential and

quasi-differential input signals with diagnostics capability

controlled through an I

C 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 pro-

grammable 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 flex-

ible 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 Q15kV

Air Gap and Q8kV Contact Discharge ESD pulses. Both

devices have a -40NC to +105NC operating temperature

range, and are available in a 16-pin QSOP package.

Features

S +3.3V or +5V Operation

S +28V to -16V Tolerant Inputs

S Wide Common-Mode Input Range (-5V to +11.5V)

S Fully Differential Inputs Up to 7V

RMS

S Quasi-Differential Inputs Up to 3.5V

RMS

S Audio Presence Detection

S Jack Sense Detection

S Diagnostic Capability

S Programmable Gain with Zero-Crossing Detection

S I

C Control Interface

S Automotive Grade ESD Protection

 ISO 10605 ±15kV Air Gap

 ±8kV Contact Discharge

Applications

Radio Head Units

RSA/RSE

Connectivity Modules

Automotive Telematics

Ordering Information appears at end of data sheet.

Typical Application Circuits continued at end of data sheet.

For related parts and recommended products to use with this part,

refer to www.maxim-ic.com/MAX13335E.related.

EVALUATION KIT AVAILABLE

MAX13325

MAX13326

MAX13335E/MAX13336E

PGA

DIAGNOSTICS

AND

CONTROL

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Summary of content (28 pages)

PAGE 1
9-6168; Rev 1; 7/12 EVALUATION KIT AVAILABLE MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics General Description The MAX13335E/MAX13336E are high-fidelity stereo audio input amplifiers designed for automotive applications requiring audio-level detection and/or jack sensing capability. Features S +3.3V or +5V Operation S +28V to -16V Tolerant Inputs S Wide Common-Mode Input Range (-5V to +11.
PAGE 2
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics ABSOLUTE MAXIMUM RATINGS VDD to GND..............................................................-0.3V to +6V D_ to GND...............................................................-16V to +28V INL_, INR_ to GND..................................................-10V to +15V OUTR, OUTL to GND................................ -0.3V to (VDD + 0.3V) SDA, SCL, INT to GND.............................................
PAGE 3
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics ELECTRICAL CHARACTERISTICS (continued) (VDD = 5V, AV = -6dB, RL = 10kI, f = 20Hz to 20kHz, TA = TJ = -40NC to +105NC, unless otherwise noted. Typical values are at TA = 25NC under normal conditions, unless otherwise noted.
PAGE 4
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics ELECTRICAL CHARACTERISTICS (continued) (VDD = 5V, AV = -6dB, RL = 10kI, f = 20Hz to 20kHz, TA = TJ = -40NC to +105NC, unless otherwise noted. Typical values are at TA = 25NC under normal conditions, unless otherwise noted.
PAGE 5
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics ELECTRICAL CHARACTERISTICS (continued) (VDD = 5V, AV = -6dB, RL = 10kI, f = 20Hz to 20kHz, TA = TJ = -40NC to +105NC, unless otherwise noted. Typical values are at TA = 25NC under normal conditions, unless otherwise noted.) (Note 2) PARAMETER Output Voltage Range Total Harmonic Distortion Plus Noise Signal-to-Noise Ratio SYMBOL VOUT THD+N SNR CONDITIONS TYP 0.1 RL = 10kW f = 1kHz, VOUT_ = 1.
PAGE 6
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics ELECTRICAL CHARACTERISTICS (continued) (VDD = 5V, AV = -6dB, RL = 10kI, f = 20Hz to 20kHz, TA = TJ = -40NC to +105NC, unless otherwise noted. Typical values are at TA = 25NC under normal conditions, unless otherwise noted.
PAGE 7
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Typical Operating Characteristics (VDD = 5V, AV = -6dB, RL = 10kI, BW = 20Hz to 20kHz, TA = +25NC, unless otherwise noted.) THD+N vs. FREQUENCY VIN_ = 2VRMS 1 THD+N (%) THD+N (%) MAX13336E 0.001 MAX13335E 0.1 1 0.1 f = 6kHz 0.01 0.001 0.0001 0.01 MAX13336E VDD = 5V AV = -22dB 10 100 f = 100Hz, 1kHz 0.0001 0 0.1 FREQUENCY (kHz) 0.1 f = 6kHz 0.01 0.5 0.1 f = 6kHz 0.01 0.001 0.
PAGE 8
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Typical Operating Characteristics (continued) (VDD = 5V, AV = -6dB, RL = 10kI, BW = 20Hz to 20kHz, TA = +25NC, unless otherwise noted.) MAX13335E VDD = 5V AV = +12dB VRIPPLE = 200mVP-P -70 -80 0.1 PSRR (dB) THD+N (%) 1 -60 MAX13335E toc07 10 MAX13335E toc08 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY THD+N vs. OUTPUT VOLTAGE f = 6kHz 0.01 OUTR -90 -100 0.0001 0.5 0 1.0 1.
PAGE 9
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Typical Operating Characteristics (continued) (VDD = 5V, AV = -6dB, RL = 10kI, BW = 20Hz to 20kHz, TA = +25NC, unless otherwise noted.) COMMON-MODE REJECTION RATIO vs. FREQUENCY MAX13335E toc14 MAX13336E VIN_ = 2VRMS -20 -30 VDD = 5V VD_ = 1.5V 900 800 700 -40 -50 -60 -70 ID_ (µA) CMRR (dB) DIAGNOSTIC CURRENT SOURCE vs.
PAGE 10
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Pin Configuration TOP VIEW + D0 1 D1 2 INL+ 3 INL- 4 INR- 5 12 OUTR INR+ 6 11 INT D2 7 10 SDA D3 8 9 SCL 16 REF 15 VDD MAX13335E MAX13336E 14 OUTL 13 GND QSOP Pin Description PIN NAME 1 D0 Diagnostic I/O 0. I/O pin used for jack sense and diagnostics. FUNCTION 2 D1 Diagnostic I/O 1. I/O pin used for jack sense and diagnostics.
PAGE 11
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Detailed Description The MAX13335E/MAX13336E are designed to operate with the MAX13325/MAX13326 dual automotive audio line drivers to form a complete differential audio link in automotive systems. In addition, the MAX13335E/ MAX13336E can operate as an auxiliary input audio amplifier with jack sense function. Signal Path The devices can be configured to operate with quasi-differential (up to 3.
PAGE 12
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics See the Applications Information section for various examples on how the diagnostic can be set up to detect different events. is high are read as control signals (see the START and STOP Conditions section). When the serial interface is inactive, SDA and SCL idle high.
PAGE 13
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics A not-acknowledge is sent when the master reads the final byte of data from the device, followed by a STOP condition. Acknowledge Bit The acknowledge bit (ACK) is a clocked 9th bit that the device uses to handshake the receipt of each byte of data when in write mode. The device pulls down SDA during the entire master-generated 9th clock pulse if the previous byte is successfully received (Figure 5).
PAGE 14
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics the slave sends the data byte, send a not-acknowledge followed by a STOP condition (Figure 9). Burst-Write Operation For a burst-write operation, send the slave address as the first byte followed by the register address and then the data bytes (Figure 8). Burst-Read Operation For a burst-read operation, send the slave address with a write as the first byte followed by the register address.
PAGE 15
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Register Map NAME REG BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 R/W POR SETTINGS STAT0 00 DH3 DL3 DH2 DL2 DH1 DL1 DH0 DL0 R 0x00 STAT1 01 APD CLD JSD TSD — ID2 ID1 ID0 R 0x00 CTRL0 02 API CLI JSI — — ZEN MUTE SHDN R/W 0x00 CTRL1 03 — — — — — — I2C1 I2C0 R/W 0x00 DIAG0 04 D1[3] D1[2] D1[1] D1[0] D0[3] D0[2] D0[1] D0[0] R/W 0x00 DIAG1
PAGE 16
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Status Register 1 (STAT1) ADDRESS: 0x01 MODE: R BIT 7 6 5 4 3 2 1 0 NAME APD CLD JSD TSD — ID2 ID1 ID0 POR 0 0 0 0 0 — — — Bit 7: APD (Audio Presence Status Bit) 0 = Audio not present. 1 = Audio presence detected. INT asserts low. Bit 6: CLD (Clip Detection Status Bit) 0 = No clipping detected. 1 = Clip warning. INT asserts low. Bit 5: JSD (Jack Sense Status Bit) 0 = Jack removed.
PAGE 17
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Control Register 0 (CTRL0) ADDRESS: 0x02 MODE: R/W BIT 7 6 5 4 3 2 1 0 NAME API CLI JSI — — ZEN MUTE SHDN POR 0 0 0 0 0 0 0 0 Bit 7: API (Audio Presence Interrupt Enable Bit) 0 = Disable 1 = Enable* *Bit automatically resets to 0 when an audio presence interrupt occurs.
PAGE 18
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Control Register 1 (CTRL1) ADDRESS: 0x03 MODE: R/W BIT 7 6 5 4 3 2 1 0 NAME — — — — — — I2C1 I2C0 POR 0 0 0 0 0 0 0 0 Bits 7 to 2: No Function (0 should be written during write access.) Bits 1 and 0: I2C_ The I2C1 and I2C0 bits determine the I2C slave address of the device. The I2C slave address is changed by writing to CTRL1 while INT is pulled low (e.g.
PAGE 19
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Diagnostic Register 1 (DIAG1) ADDRESS: 0x05 MODE: R/W BIT 7 6 5 4 3 2 1 0 NAME D3[3] D3[2] D3[1] D3[0] D2[3] D2[2] D2[1] D2[0] POR 0 0 0 0 0 0 0 0 The Diagnostic registers, DIAG0 and DIAG1, program the state of the four diagnostic I/O ports D_.
PAGE 20
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Gain Register (GAIN) ADDRESS: 0x06 MODE: R/W BIT 7 6 5 4 3 2 1 0 NAME GL3 GL2 GL1 GL0 GR3 GR2 GR1 GR0 POR 0 0 0 0 0 0 0 0 Bits 7 to 0: G_ The Gain register sets the gain of the internal programmable gain amplifier (AV) for the left (GL[3:0]) and right (GR[3:0]) channels.
PAGE 21
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics MAX13335E/MAX13336E D1[3:0] ≥ 0010 97µA D1 VIDH L VIDL R C D0[3:0] = 1110 40µA TO 705µA D0 VIDH DH0 DL0 VIDL Figure 11.
PAGE 22
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics MAX13335E/MAX13336E D1[3:0] = 0000 40µA TO 705µA D1 VIDH 1kΩ-10kΩ 1kΩ-10kΩ CONNECTOR L VIDL R C D3 D2[3:0] = 1111 D3[3:0] = 1101 40µA TO 705µA 0-10kΩ D2 VIDH 705µA VIDH DH3 DL2 VIDL VIDL Figure 12.
PAGE 23
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics ESD Guide For maximum protection against IEC 61000-4-2 and ISO 10605 ESD pulses, a 1kI or larger resistor is recommended on every diagnostic D_ pin before the input AC-coupling capacitor. Additionally, a suitable ESD diode must be connected from the DC-blocking ceramic capacitor to ground.
PAGE 24
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Typical Application Circuits (continued) LOCAL JACK SENSE CONNECTION 3.3V OR 5V 1µF VDD MAX13335E/MAX13336E 40µA TO 705µA D_[3:0] D3 D2 D1 ESD PROTECTION 2kΩ 2kΩ SDA VIDH DH_ I2C AND CONTROL SCL INT DL_ D0 2kΩ VIDL X4 R 2.2µF 2.2µF INLINL+ C 2.2µF 2.2µF AUDIO PRESENCE DETECT INR+ OUTL PGA ESD PROTECTION L INR- OUTR PGA GND REF 10µF EXTERNAL ESD PROTECTION COMPONENTS ARE NOT SHOWN.
PAGE 25
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Typical Application Circuits (continued) REMOTE JACK SENSE CONNECTION 3.3V OR 5V 1µF VDD MAX13335E/MAX13336E 40µA TO 705µA D3 D_[3:0] D2 D1 ESD PROTECTION 2kΩ VIDH DH_ I2C AND CONTROL 2kΩ SCL INT DL_ D0 2kΩ SDA VIDL L 2.2µF 2.2µF R C 2.2µF 2.
PAGE 26
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Typical Application Circuits (continued) DIFFERENTIAL CONNECTION 3.3V OR 5V 1µF VDD MAX13335E/MAX13336E 40µA TO 705µA D3 D_[3:0] D2 D1 ESD PROTECTION 2kΩ VIDH DH_ I2C AND CONTROL 2kΩ SCL INT DL_ D0 2kΩ SDA VIDL X4 L2.2µF L+ 2.2µF R+ 2.2µF R- AUDIO PRESENCE DETECT INLINL+ INR+ OUTL PGA ESD PROTECTION 2.2µF INR- OUTR PGA GND REF 10µF EXTERNAL ESD PROTECTION COMPONENTS ARE NOT SHOWN.
PAGE 27
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Ordering Information PART MAX13335EGEE/V+ MAX13336EGEE/V+ TEMP RANGE -40NC to +105NC -40NC to +105NC GAIN RANGE (dB) OPTIONS PIN-PACKAGE -14 to +16 Differential VIN up to 4VRMS; quasi-differential VIN up to 2VRMS 16 QSOP -22 to +8 Differential VIN up to 7VRMS; quasi-differential VIN up to 3.5VRMS 16 QSOP /V denotes an automotive qualified part. +Denotes a lead(Pb)-free/RoHS-compliant package.
PAGE 28
MAX13335E/MAX13336E Dual Automotive Differential Audio Receivers with I2C Control and Diagnostics Revision History REVISION NUMBER REVISION DATE 0 1/12 Initial release — 7/12 Corrected the read operation procedure in the Single Byte-Read Operation and Burst-Read Operation sections 14 1 DESCRIPTION PAGES CHANGED Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.