Analog Devices Inc./Maxim Integrated

The MAX98363 is a tiny, low-cost, SoundWire®input Class D mono amplifier that provides industry-leading, Class AB audio performance with Class D efficiency. The device features an internal tone generator, interrupt control, and selectable slew-time settings for SoundWire data output PHY. A novel pinout allows customers to use the cost-effective wafer-level package (WLP) with no need for expensive in-pad vias.The MAX98363 is a SoundWire peripheral device that supports MIPI SoundWire v1.2-compatible digital interface for audio and control data. The digital interface is highly flexible and supports a variety of input clock frequencies. Also, selectable slew-time controls on the SoundWire data output PHY help minimize EMI on a range of capacitive bus loads. The digital interface operates on 1.8V nominal voltage supply which can be either supplied externally, or generated by an internal LDO.An internal tone generator, with a variety of frequency options, supports in-factory testing or system boot-up sounds during system power-up. An externally configurable address pin allows up to five unique SoundWire addresses for each device part number. The MAX98363A/B operate with DVDDIO supplied with internal LDO and can support up to 10 MAX98363 SoundWire peripheral devices on one data lane. The MAX98363C/D operate with externally supplied DVDDIO and support up to 10 MAX98363 SoundWire peripheral devices on one data lane.Active emissions-limiting, edge-rate limiting, and overshoot control circuitry greatly reduce EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices and reduces the component count of the solution.The device is specified over the -40°C to +85°C temperature range.APPLICATIONSNotebook ComputersTabletsIoT DevicesGaming Devices (Audio and Haptics)Smart SpeakersSmartphonesSingle Li-ion Cell/5V Devices

The MAX98365 is an easy-to-use, low-cost, digital input Class-D amplifier that provides industry-leading, Class-AB audio performance with Class-D efficiency. The digital audio interface automatically recognizes different PCM and TDM clocking schemes which eliminates the need for I2C programming: Simply supply power, LRCLK, BCLK, and digital audio to generate sound. Furthermore, a novel pinout allows customers to use the cost-effective wafer-level package (WLP) with no need for expensive in-pad vias. A wide 3V to 14V supply range allows the device to deliver 13.8W into an 8Ω load.The digital audio interface is highly flexible. The devices support I2S, left-justified, and 8-channel time division multiplexed (TDM) data formats. The digital audio interface accepts 8kHz, 16kHz, 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz sample rates. Data words can be 16-bit, 24-bit, or 32-bit in I2S and left-justified modes and 16-bit or 32-bit in TDM mode.Digital audio interface input thresholds are ideal for interfacing to 1.2V and 1.8V logic. The devices can tolerate logic input voltages up to 5.5V.The MAX98365A and MAX98365B have fast 1ms turn-on times while the MAX98365C and MAX98365D ramp the volume over 13ms during turn-on and turn-off.The devices eliminate the need for the external MCLK signal that is typically used for PCM communication. This reduces EMI and possible board coupling issues in addition to reducing the size and pin count. The devices also feature a very high wideband jitter tolerance (12ns, typ) on BCLK and LRCLK to provide robust operation.Active emissions-limiting, edge-rate limiting, and overshoot control circuitry greatly reduce EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class-D devices and reduces the component count of the solution.The devices are specified over the -40°C to +85°C temperature range.ApplicationsSmart SpeakersNotebook ComputersIoT DevicesGaming Devices (Audio and Haptics)SmartphonesTabletsCameras

The MAX98372 is a high-efficiency, mono Class D audio amplifier featuring dynamic headroom tracking (DHT) and brownout protection. DHT automatically optimizes the headroom available to the Class D amplifier as the power supply voltage varies, due to sudden transients and declining battery life to maintain a consistent listening experience. A wide 5.5V to 18V supply range allows the device to reach 19W into an 8Ω load.The MAX98372’s flexible digital audio interface (DAI) supports I2S, left-justified, and TDM formats. The digital audio interface accepts 32kHz, 44.1kHz, 48kHz, 88.2kHz, and 96kHz sample rates with 16-/24-/32-bit data supported for all data formats. In TDM mode, the device can support up to 16 channels of audio data. A unique clocking structure eliminates the need for an external MCLK signal that is typically needed for PCM communication. This reduces pin count and simplifies board layout.Active emissions limiting with edge rate control minimizes EMI and eliminates the need for output filtering found in traditional Class D devices.An 8-bit PVDD supply voltage ADC enables the dynamic headroom tracking circuit. DHT optimizes audio program peak behavior as the supply voltage varies and provides flexible user-defined parameters.Thermal foldback protection ensures robust behavior when the thermal limits of the device are exercised. The circuit can be enabled to automatically reduce the output power above a user specified temperature. This allows for uninterrupted music playback even at high ambient temperatures. Traditional thermal protection is also available in addition to robust overcurrent protection.All MAX98372 control is performed using a standard 2-wire, I2C interface. One of sixteen slave addresses can be selected through two, four-level address pins. The IC is available in a 0.4mm pitch, 30-bump WLP and 32-pin TQFN packages. It is specified over the extended, -40°C to +85°C temperature range.For similar function without brownout protection seeMAX98371ApplicationsNotebook ComputersSoundbarsTablets

The MAX98388/MAX98389 is a small, cost-effective mono digital input amplifier with integrated IV feedback. The device operates over a wide supply voltage range from 2.3V to 10V. With this supply range, both versions support single-cell, two-cell, and externally regulated/boosted portable applications. MAX98388 is optimized for up to 5.5V applications (single-cell), while MAX98389 is optimized for 5V to 10V cases (two-cell).The Class-D playback amplifier pairs Class-AB level audio performance with the efficiency needed to extend battery life in portable applications. Active emissions-limiting (AEL) and edge-rate limiting circuitry combined with a spread-spectrum modulation (SSM) scheme reduces EMI and eliminates the need for the output filtering required for traditional Class-D amplifiers.The device provides a precision output current sense channel and an output voltage feedback channel. The data collected by these channels can be transmitted on the audio data output and enables algorithms such as audio enhancement, bass boosting, speaker protection, and haptic functions to be run on the host audio DSP. The device includes a programmable threshold playback channel ALC that provides brownout protection for batteries in portable systems, and robust thermal and overcurrent protection to prevent device damage.The device provides a PCM interface for audio playback and IV feedback data and pairs this with a standard I2C interface for device control and status readback. The PCM interface supports common audio data formats such as I2S, left justified, and TDM timing. A unique clocking structure eliminates the need for an external high-frequency reference clock. In addition to reducing device size and pin count, eliminating this clock saves interface power while reducing the risk of EMI from high-speed switching and potential board coupling issues.The package connections are designed to only require edge routing, allowing the use of the cost-effective wafer-level package (WLP) with no requirement for expensive bump vias. The device is available in a 0.4mm pitch 16-bump WLP package and is specified over the extended -40°C to +85°C temperature range.ApplicationsAR/VR WearablesLRA Haptic DriveSmart Watches and IoT DevicesGaming DevicesNotebooks and Tablets

The MAX98390 is a high-efficiency mono Class-D DSM smart amplifier that features an integrated boost converter, integrated Dynamic Speaker Management™, and FET scaling for higher-efficiency at low output power.The maximum boost converter output voltage is programmable from 6.5V to 10V in 0.125V increments from a battery voltage as low as 2.65V. The boost converter supports bypass mode for lower quiescent current and improved mid-power efficiency as well as envelope tracking which automatically adjusts the output voltage for maximum efficiency. The boosted supply efficiently delivers up to 6.2W at 10% THD+N into a 4Ω load.Integrated IV sense and Dynamic Speaker Management allows louder, fuller audio while protecting the speaker against damage and improving sound quality.The PCM interface supports I2S, left-justified, and 16-channel TDM formats as a slave or master device with I2C control. Either BCLK or MCLK can be used as the internal clock source providing system level flexibility.Thermal and other status data can also be read from the I2C interface.Patented active emissions limiting edge rate and overshoot control circuitry minimizes EMI and eliminates the need for output filtering found in traditional Class-D devices.A flexible brownout-detection engine (BDE) can be programmed to initiate various current limiting, signal limiting, and clip functions to prevent dips in battery voltage. Threshold, hysteresis, and attack-and-release rates are programmable.The MAX98390C is available in a 0.4mm pitch, 36-bump wafer-level package. The MAX98390D is available in a 0.5mm pitch, 30-bump wafer-level package. They are specified over the extended -40°C to +85°C temperature range.Design Solution: Unleash the Full Potential of Your Micro Speakers ›ApplicationsSmartphonesTabletsNotebook ComputersSingle Li-ion Cell DevicesIoT DevicesToys

The MAX98395 is a 11.7W high-efficiency, mono Class-DG speaker amplifier with industry leading quiescent power and a wide supply range that can even support single cell Li+ batteries or an external boost. MAX98395 also features current and voltage sense (I/V sense) and dynamic headroom tracking (DHT). Precision output current and voltage monitoring (I/V sense) enables speaker protection algorithms to be run by a host device. Spread spectrum modulation (SSM) and edge rate control minimize EMI and eliminate the need for the output filtering found in traditional Class-D devices.To achieve industry-leading quiescent power, the Class-DG amplifier employs two supply rails, VBAT and PVDD, to supply the speaker amplifier. Additionally, as the power-supply voltage varies due to sudden transients and declining battery life, DHT automatically optimizes the headroom available to the Class-DG amplifier to maintain consistent distortion and listening levels. The DHT block provides both a dynamic range compressor (DRC) and a limiter that can operate as either a signal distortion limiter (SDL) or standard signal level limiter (SLL).The device provides a PCM interface for audio data and a standard I2C interface for control data communication. The PCM interface supports audio playback using I2S, left-justified, and TDM audio data formats. In TDM mode, the device can support up to 16 channels of audio data. A unique clocking structure eliminates the need for an external master clock for PCM communication, which reduces pin count and simplifies board layout.Thermal-foldback protection ensures robust behavior when the thermal limits of the device are reached. When enabled, it automatically reduces the output power when the temperature exceeds a user-specified threshold. This allows for uninterrupted music playback even at high ambient temperatures. Traditional thermal protection is also available in addition to robust over-current protection.The device is available in a 0.4mm pitch, 28-bump wafer-level package (WLP). The device operates over the extended -40°C to +85°C temperature range.ApplicationsMobile SpeakersNotebook ComputersSmart IoTSmart SpeakersSoundbarsTablets

The MAX98396 is a high-efficiency, mono Class-DG speaker amplifier with industry-leading quiescent power featuring I/V sense, brownout-prevention engine (BPE), and dynamic-headroom tracking (DHT). The IC enables ultrasound applications by providing support for sample rates up to 192kHz, a higher passband (for fs> 50kHz), and a bypass path for the ultrasound signals through the amplifier so it is not attenuated by the audio processing. Precision output current and voltage monitoring (I/V sense) enables the host device to run speaker protection algorithms. Spread-spectrum modulation (SSM) and edge rate control minimize EMI and eliminate the need for the output filtering found in traditional Class-D devices.To achieve industry-leading quiescent power, the Class-DG amplifier employs two supply rails VBAT (3V to 5.5V) and PVDD (3V to 20V) to supply the speaker amplifier. The Class-DG amplifier switches between the two supply rails depending on the input signal level and/or the supply headroom. The brownout-prevention engine in the device allows it to reduce its contribution to the overall system power consumption by either attenuating or limiting the amplifier output when the device supply drops below a set of programmable thresholds. Additionally, as the power supply voltage varies due to sudden transients and declining battery life, DHT automatically optimizes the headroom available to the Class-DG amplifier to maintain consistent distortion and listening levels.The device provides a PCM interface for audio data and a standard I2C interface for control data communication. The PCM interface supports audio playback using I2S, left-justified, and TDM audio data formats. A unique clocking structure eliminates the need for an external master clock for PCM communication, which reduces pin count and simplifies board layout. Enabling thermal foldback automatically reduces the output power when the temperature exceeds a user specified threshold. This allows for uninterrupted music playback even at high ambient temperatures. Traditional thermal protection is also available in addition to robust overcurrent protection.The device is available in a 0.4mm pitch, 35-bump wafer-level package (WLP). The device operates over the extended -40°C to +85°C temperature range.ApplicationsMobile SpeakersSmart SpeakersSmart IoTTabletsNotebook ComputersSoundbars