SSM2160SZ-REEL

Audio Special Purpose Overview

The SSM2160 is a six-channel, serial-input master/balance volume control featuring clickless digitally controlled level adjustment. It integrates low distortion voltage-controlled amplifiers (VCAs) with a 7-bit master DAC providing 128 attenuation levels and individual 5-bit channel DACs offering 32 gain levels. The device supports single supplies of +10 V to +20 V or dual supplies from ±5 V to ±10 V. Key electrical specifications include a 90 dB dynamic range, 0.01% THD+N, and a -90 dBu noise floor. It operates within an ambient temperature range of 0°C to 70°C and is housed in a 24-lead SOIC package.

Audio Special Purpose Feature Summary

• Six independent audio channels with dedicated 5-bit DACs for channel gain control (0 dB to +31 dB).
• Centralized 7-bit master DAC provides 128 levels of attenuation (-127 dB to 0 dB) with automatic power-on mute.
• High-fidelity audio performance characterized by 0.01% THD+N, 90 dB SNR, and -80 dB channel separation.
• Flexible serial interface compatible with 3-wire or 4-wire microcontroller buses for digital volume and balance adjustment.

Audio Special Purpose Applications

• Home theater receivers and surround sound decoders.
• DSP soundfield processors and HDTV audio systems.
• Automotive surround sound systems.
• Multiple input mixer consoles and amplifiers.

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and reel configuration. Ensure that the supply voltage requirements (+10 V to +20 V single or ±5 V to ±10 V dual) align with the target system design. Confirm thermal management capabilities for the 24-SOIC package under maximum operating conditions.

Audio Special Purpose Selection Notes

Select this component for applications requiring precise digital control over multiple audio channels with high dynamic range. Ensure the host microcontroller can drive the serial interface at frequencies up to 1 MHz. Consider external resistor values if non-standard step sizes for master or channel controls are required beyond the default 1 dB resolution.

Audio Special Purpose Part Context

This part belongs to the Analog Devices SSM2160 series of specialized audio integrated circuits. It is designed specifically for multichannel volume and balance control in professional and consumer audio equipment. The device replaces mechanical potentiometers with a solid-state solution offering superior channel matching and electronic durability.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and control logic interfaces when considering alternative components from other manufacturers.

Audio Special Purpose FAQ

How does the SSM2160 prevent clicking during volume adjustments?

Clicking is eliminated by using controlled rate-of-change drive to the VCAs in the master control path. Additionally, a capacitor connected between MSTR OUT and MSTR SET limits the output rate of change to further prevent zipper noise.

What is the maximum allowable output signal level relative to the supply voltage?

The peak-to-peak output signal level must not exceed one-quarter of the total power supply span (from V+ to V–) to avoid saturation, regardless of the input signal level or gain/attenuation settings.

Can the step size of the volume control be modified?

Yes, the default 1 dB step size can be modified using external resistors. A resistor between MSTR SET and MSTR OUT reduces the master step size, while a resistor between CH SET and V+ increases the channel step size.