SSM2315-EVALZ 评估板

The SSM2315 features a high efficiency, low noise modulation scheme that requires no external LC output filters. The modulation continues to provide high efficiency even at low output power. It operates with 93% efficiency at 1.4 W into 8 Ω or 85% efficiency at 3 W into 3 Ω from a 5.0 V supply and has an SNR of >103 dB. Spread-spectrum pulse density modulation is used to provide lower EMI-radiated emissions compared with other Class-D architectures.

The SSM2315 has a micropower shutdown mode with a typical shutdown current of 20 nA. Shutdown is enabled by applying a logic low to the SD pin.

The device also includes pop-and-click suppression circuitry. This suppression circuitry minimizes voltage glitches at the output during turn-on and turn-off, reducing audible noise on activation and deactivation.

The fully differential input of the SSM2315 provides excellent rejection of common-mode noise on the input. Input coupling capacitors can be omitted if the dc input common-mode voltage is approximately VDD/2.

The default gain of the SSM2315 is 6 dB, but users can reduce the gain by using a pair of external resistors (see the Gain section).

The SSM2315 is specified over the industrial temperature range of -40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm wafer level chip scale package (WLCSP).

应用

Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys

特点

Filterless Class-D amplifier with Σ-Δ modulation
No sync necessary when using multiple Class-D amplifiers from Analog
Devices, Inc.
3 W into 3 u load and 1.4 W into 8 u load at 5.0 V supply with <1% total
harmonic distortion (THD + N)
93% efficiency at 5.0 V, 1.4 W into 8 u speaker
>103 dB signal-to-noise ratio (SNR)
Single-supply operation from 2.5 V to 5.5 V
20 nA ultralow shutdown current
See Data Sheet for Additional Information

功能框图

Functional Block Diagram for SSM2315

芯片引脚定义图

技术指标

Output Power (W)

Supply Current

3.3mA

SSM2315 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
SSM2315-EVALZ	量产	评估板		工业
SSM2315CBZ-REEL	量产		9	工业
SSM2315CBZ-REEL7	量产		9	工业