Overview
The SSM2518CPZ-RL is a fully integrated, 2-channel digital input, Class-D audio power amplifier produced by Analog Devices Inc. This device is designed to receive digital audio input and produce PDM (Pulse Density Modulation) differential switching outputs using its internal power stage. It features built-in protection for overtemperature and overcurrent conditions, as well as soft turn-on and turn-off capabilities to suppress pop-and-click noises. The amplifier supports a 2-wire serial (I2C-compatible) microprocessor bus for programmable register control.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Power Supply | PVDD: 5.0 V, DVDD: 1.8 V | Typical operating conditions |
| Output Power | 2 W x 2 @ 4 Ω | fS = 48 kHz, RL = 8 Ω + 15 µH |
| Sample Rate | Up to 192 kHz | MCLK = 128 × fS |
| Operating Temperature | -40°C to +85°C | |
| Package Type | 20-Lead LFCSP (4x4) | |
| Master Clock Frequency | 2.048 MHz to 6.144 MHz | Dependent on sample rate |
| Thermal Resistance (θJA) | Specified for worst-case conditions | Device soldered in a circuit board |
Key Features
- Built-in protection for overtemperature and overcurrent conditions.
- Soft turn-on and turn-off for pop-and-click suppression.
- Programmable register control via I2C port.
- Smart power-down state to reduce power consumption when no audio signal is detected.
- Internal power-on reset and voltage supervisor circuit to ensure safe operation during power-on and power removal.
- Support for I2S and other digital audio interfaces.
Applications
The SSM2518CPZ-RL is suitable for a variety of audio applications, including:
- Portable audio devices such as smartphones, tablets, and MP3 players.
- Home audio systems and soundbars.
- Automotive audio systems.
- Consumer electronics requiring high-efficiency audio amplification.
Q & A
- What is the output power of the SSM2518CPZ-RL?
The SSM2518CPZ-RL can deliver up to 2 W x 2 @ 4 Ω per channel.
- What are the operating temperature ranges for the SSM2518CPZ-RL?
The device operates within a temperature range of -40°C to +85°C.
- What type of package does the SSM2518CPZ-RL come in?
The SSM2518CPZ-RL is packaged in a 20-Lead LFCSP (4x4).
- Does the SSM2518CPZ-RL have built-in protection features?
Yes, it includes protection for overtemperature and overcurrent conditions.
- How does the SSM2518CPZ-RL manage power consumption during idle periods?
The device enters a smart power-down state when no audio signal is detected for 1024 consecutive samples.
- What is the purpose of the internal power-on reset and voltage supervisor circuit?
This circuit ensures safe operation during power-on and power removal by resetting the device if supply voltages fall below nominal operating thresholds.
- Can the SSM2518CPZ-RL be controlled via an external microprocessor?
Yes, it supports programmable register control via an I2C port.
- What is the frequency range of the master clock required for the SSM2518CPZ-RL?
The master clock frequency must be between 2.048 MHz and 6.144 MHz, depending on the sample rate.
- How does the SSM2518CPZ-RL suppress pop-and-click noises?
The device features soft turn-on and turn-off capabilities to suppress pop-and-click noises.
- What digital audio interfaces does the SSM2518CPZ-RL support?
The device supports I2S and other digital audio interfaces.
