MAX98357AETE+T

Part: MAX98357A/MAX98357B — Analog Devices (Maxim Integrated)

Type: Digital PCM/I²S Input Class D Audio Amplifier

Description: 2.5–5.5 V single-supply, 3.2 W (4 Ω, 5 V) mono Class D amplifier with I²S/left-justified/TDM digital input, no MCLK required, and 92% efficiency.

Operating Conditions:

• Supply voltage: 2.5–5.5 V (guaranteed by PSRR test)
• Operating temperature: -40 to +85 °C
• LRCLK sample rates: 8 kHz to 96 kHz; BCLK must be 32, 48, or 64× LRCLK (0.2432–25.804 MHz)

Absolute Maximum Ratings:

• Max supply voltage: VDD, LRCLK, BCLK, DIN to GND: -0.3 V to +6 V
• Max continuous current: ±1.6 A (VDD/GND/OUT_)
• Max junction temperature: +150 °C
• Storage temperature: -65 to +150 °C

Key Specs:

• Quiescent current: 2.75 mA typ, 3.35 mA max (VDD = 5 V, TA = +25 °C); 2.4 mA typ at VDD = 3.7 V
• Shutdown current: 0.6 μA typ, 2 μA max (SD_MODE = 0 V, TA = +25 °C)
• Standby current: 340 μA typ, 400 μA max (SD_MODE = 1.8 V, no BCLK)
• Output power (THD+N 10%, 12 dB gain): 3.2 W into 4 Ω + 33 μH; 1.8 W into 8 Ω + 68 μH (VDD = 5 V)
• THD+N: 0.02% typ at 1 kHz, 1 W, 4 Ω (0.06% max for WLP); 0.013% typ at 0.5 W, 8 Ω
• Efficiency: 92% typ (8 Ω + 68 μH, THD+N = 10%, 1 kHz, 12 dB gain)
• Output noise: 22.8 μV RMS (A-weighted); dynamic range 103.5 dB
• PSRR: 75 dB typ (60 dB min) over VDD 2.5–5.5 V; 77 dB at 217 Hz
• Speaker current limit: 2.8 A typ; Class D switching frequency 300 kHz (spread spectrum ±20 kHz)
• Pin-selectable gain: 3, 6, 9, 12, 15 dB
• Turn-on time: 7 ms typ, 7.5 ms max
• Digital input levels: VIH 1.3 V min, VIL 0.6 V max

Features:

• No MCLK required; auto-detects up to 35 PCM/TDM clocking schemes with no I²C programming
• MAX98357A supports I²S; MAX98357B supports left-justified; both support 8-channel TDM
• Output selectable as left, right, or (left/2 + right/2)
• Filterless Class D with spread-spectrum modulation and edge-rate control for low EMI
• High jitter tolerance (12 ns typ on BCLK/LRCLK)
• Click-and-pop reduction
• Short-circuit and thermal protection
• Low RF susceptibility (rejects TDMA noise from GSM radios)

Applications:

• Single Li-ion cell/5 V devices
• Smart speakers
• Notebook computers
• IoT devices
• Gaming devices (audio and haptics)
• Smartphones
• Tablets
• Cameras

Package:

• 9-pin WLP (1.345 mm × 1.435 mm × 0.64 mm, 0.4 mm pitch)
• 16-pin TQFN (3 mm × 3 mm × 0.75 mm)

• Single-Supply Operation (2.5V to 5.5V)
• 3.2W Output Power into 4Ω at 5V
• 2.4mA Quiescent Current
• 92% Efficiency (R L = 8Ω, P OUT = 1W)
• 22.8μV RMS Output Noise (A V = 15dB)
• Low 0.013% THD+N at 1kHz
• No MCLK Required
• Sample Rates of 8kHz to 96kHz
• Supports Left, Right, or (Left/2 + Right/2) Output
• Sophisticated Edge Rate Control Enables Filterless Class D Outputs
• 77dB PSRR at 1kHz
• Low RF Susceptibility Rejects TDMA Noise from GSM Radios
• Extensive Click-and-Pop Reduction Circuitry
• Robust Short-Circuit and Thermal Protection
• Available in Space-Saving Packages: 1.345mm x 1.435mm WLP (0.4mm Pitch) and 3mm x 3mm TQFN
• Solution Size with Single Bypass Capacitor is 4.32mm 2

• Single Li-ion Cell/5V Devices
• Smart Speakers
• Notebook Computers
• IoT Devices
• Gaming Devices (Audio and Haptics)
• Smartphones
• Tablets
• Cameras

(V DD = 5V, V GND = 0V, GAIN_SLOT = V DD . BCLK = 3.072MHz, LRCLK = 48kHz, speaker loads (Z SPK ) connected between OUTP and OUTN, Z SPK = ∞, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 2)

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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.

For the latest package outline information and land patterns (footprints), go to www.analog.com/packages . Note that a '+', '#', or '-' in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

TIE WANG 06/27/14

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