MAX98360A
Tiny, Cost-Effective, Plug-and-Play Digital Class-D Amplifier
One-of-a-Kind Filterless, High-Performance Class-D Amplifier in a Tiny WLP Package with no Vias or Programming Required
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Overview
Features and Benefits
- Simple Plug-and-Play Design
- Single-Supply Operation (2.5V to 5.5V)
- 3.2W Output Power into 4Ω at 5V
- 2.2mA Quiescent Current
- 1ms Turn-On Time (for MAX98360A and MAX98360B)
- 92% Efficiency (RL = 8Ω, THD+N = 10%)
- 10μVRMS Output Noise
- 110dB Dynamic Range
- Low 0.009% THD+N at 1kHz
- No MCLK Required
- Sample Rates of 8kHz to 96kHz
- Supports Left, Right, or (Left/2 + Right/2) Output in I2S and Left-Justified Modes
- Sophisticated Edge Rate Control Enables Filterless Class-D Outputs
- 81dB PSRR at 217Hz
- 1.5μA Standby Current Allows Elimination of GPIO for EN Pin
- Low RF Susceptibility Rejects TDMA Noise from GSM Radios
- Class-D Switching Frequency Trimmed to 5% for Better EMI Planning
- Extensive Click-and-Pop Reduction Circuitry
- Robust Short-Circuit and Thermal Protection
- Available in Space-Saving Package: 9-Pin WLP (0.4mm Pitch) or 10-Pin FC2QFN (0.5mm Pitch)
- 3.69mm2 Solution Size for WLP With A Single Bypass Capacitor
Product Details
The MAX98360A/B/C/D is an easy-to-use, low-cost, digital pulse-code modulation (PCM) 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 audio. Furthermore, a novel pinout allows customers to use the cost-effective WLP package with no need for expensive vias.
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, and 96kHz 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 MAX98360A and MAX98360B have fast 1ms turn-on times while the MAX98360C and MAX98360D 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.
MAX98360 Version Management
| Ramping | Frame Sync Pulse on LRCLK | 50% Duty Cycle on LRCLK | ||||
|---|---|---|---|---|---|---|
| Turn-On/Off Ramp | Start-Up Time | Format | BCLK Active Edge | Format | BCLK Active Edge | |
| MAX98360A | Ramp Disabled | 1ms | TDM | rising | I2S | rising |
| MAX98360B | Ramp Disabled | 1ms | TDM | falling | LJ | rising |
| MAX98360C | Ramp Enabled | 13ms | TDM | rising | I2S | rising |
| MAX98360D | Ramp Enabled | 13ms | TDM | falling | LJ | rising |
Applications
- Single Li-ion Cell/5V Devices
- Smart Speakers
- Notebook Computers
- IoT Devices
- Gaming Devices (Audio and Haptics)
- Smartphones
- Tablets
- Cameras
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (8)
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IBS
MAX98360A IBIS Model
109.06K
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