AD1940YSTZ

$15.42

Description：IC AUDIO 28BIT 192K 48LQFP
Series：SigmaDSP®

SKU:13e0536623e2 Category: ADCs/DACs - Special Purpose Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC AUDIO 28BIT 192K 48LQFP
Series：SigmaDSP®
Mfr：Analog Devices Inc.
Package：Tray
Type：Audio
Number of Channels：4
Resolution (Bits)：28 b
Sampling Rate (Per Second)：192k
Data Interface：SPI
Voltage Supply Source：Single Supply
Voltage - Supply：2.25V ~ 2.75V
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：48-LQFP
Supplier Device Package：48-LQFP (7x7)
Grade：-
Qualification：-

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AD1940YSTZ

Overview

The AD1940YSTZ is a 48-lead LQFP multichannel audio SigmaDSP processor from Analog Devices. It features a 28-bit DSP core with full 56-bit double-precision arithmetic for high-fidelity signal processing. The device supports sample rates up to 192 kHz and includes 21 kB of data memory for audio delay. It operates on a single 2.5 V supply, utilizing an on-chip voltage regulator for compatibility with 3.3 V or 5 V systems. The AD1940 variant uses a 4-wire SPI control interface, while the AD1941 uses I2C.

Feature Summary

16-channel digital audio processing with 28-bit × 28-bit multiplier and 56-bit accumulator
Supports sample rates up to 192 kHz with flexible serial data ports (I2S, left/right justified, TDM)
Fully programmable RAM allowing custom algorithm download and 1,024 parameter controls
Integrated PLL generates master clock from 64×, 256×, 384×, or 512× fs inputs

Applications

Automotive sound systems
Digital televisions
Home theater systems (Dolby Digital/DTS postprocessor)
Multichannel audio systems
Digital speaker crossover

Procurement Notes

Verify the specific ordering suffix 'YSTZ' against the manufacturer's current datasheet revision B to confirm package type and temperature range specifications. Ensure the design utilizes the correct control interface, as the AD1940 requires SPI while the AD1941 requires I2C.

Selection Notes

Select this component for applications requiring multi-channel equalization, dynamics processing, and delay compensation. The AD1940 is chosen when SPI control is preferred; the AD1941 is selected for I2C bus integration. Both variants share identical signal processing capabilities and pinouts except for the control port.

Part Context

The AD1940/AD1941 are part of the SigmaDSP family, designed to replace discrete analog processing chains. They offer studio-quality signal processing algorithms, including biquad filters and surround sound processors, configurable via software tools.