Analog Devices Inc. AD1896YRS

Overview

AD1896YRS from Analog Devices is a 24-bit, second-generation asynchronous sample rate converter (ASRC) designed for high-fidelity digital audio systems. It performs bidirectional sample rate conversion between input and output serial ports up to 192 kHz, supports 1:8 upsampling and 7.75:1 downsampling, delivers –133 dB THD+N and 142 dB A-weighted dynamic range, and operates with 3.3 V core and 3.3/5.0 V I/O supplies in automotive-grade temperature range (–40°C to +105°C).

For engineers reviewing the AD1896YRS datasheet, AD1896YRS pinout, AD1896YRS application, or AD1896YRS equivalent, key selection considerations include its hardware-configurable serial interface modes (I²S, left/right-justified, TDM), group delay selection (short/long), matched-phase daisy-chain capability, and jitter rejection performance critical for studio mixers, automotive infotainment, and broadcast equipment.

Technical Context

The AD1896YRS implements a 64-tap FIR filter with 220 polyphases, a FIFO-based interpolation architecture, and a digital servo loop that measures input/output sample timing difference within ±5 ps. Its sample rate ratio circuit dynamically scales filter length for decimation while incorporating hysteresis to prevent oscillation-induced distortion.

It supports master clock (MCLK) independence from both serial ports, enabling crystal-based MCLK generation to reduce board-level EMI. The device offers three master clock modes (256×f_S, 512×f_S, 768×f_S) and hardware-selectable output word lengths (16/18/20/24 bits) via dedicated pins.

Key Specifications

Pinout & Package

AD1896YRS is housed in a 28-lead SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, RoHS-compliant, surface-mountable, and thermally rated at θ_JA = 109°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar asynchronous sample rate conversion applications.

Compared with CS8422-CQZ and SRC4392IPAG, AD1896YRS provides superior jitter immunity (sub-5 ps servo resolution), hardware-configurable operation without host intervention, and automotive-grade reliability - making it optimal for mission-critical, low-latency, multi-unit audio infrastructure where deterministic timing is non-negotiable.

Availability

AD1896YRS is available at Aetrix Electronics and suitable for home theater receivers, automotive infotainment head units, digital broadcast STL systems, and professional studio mixer I/O expansion requiring stable component supply across extended product lifecycles.

Supply support for AD1896YRS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide.

The AD1896YRS belongs to Analog Devices' precision audio signal chain portfolio, engineered specifically for professional and automotive-grade asynchronous sample rate conversion where jitter suppression, phase coherence, and hardware configurability are mandatory.

FAQ

What is the maximum supported input and output sample rate for the AD1896YRS?

The AD1896YRS supports simultaneous 192 kHz input and output sample rates, verified per datasheet Section "AD1896–SPECIFICATIONS" and confirmed in the Product Overview. This capability enables direct handling of high-resolution audio formats such as DVD-Audio and SACD without down-sampling. The device maintains –133 dB THD+N and 142 dB dynamic range even at 192 kHz:32 kHz conversion, making AD1896YRS suitable for mastering-grade applications where fidelity must be preserved across extreme rate ratios.

Does the AD1896YRS require software configuration to operate?

No, the AD1896YRS operates without software or register programming. Its automatic sample frequency sensing and self-configuring digital servo loop detect input/output rates and adapt FIR filter coefficients in real time. All critical functions - serial format (I²S/left/right-justified/TDM), output word length (16/18/20/24-bit), and group delay (short/long) - are controlled via hardware pins (SMODE_IN, WLNGTH_OUT, GRPDLYS). This makes AD1896YRS ideal for resource-constrained embedded systems where microcontroller overhead must be minimized.

How does the AD1896YRS handle jitter on the input and output sample clocks?

The AD1896YRS incorporates a digital servo loop that measures timing differences between input and output samples with ±5 ps resolution and rejects jitter starting below 1 Hz. This architecture isolates downstream audio components from clock instability, enabling clean conversion even when sourced from low-cost crystals or noisy switch-mode power supplies. Verified test data (TPC 24–28) shows THD+N remains below –120 dB across all supported sample rate combinations, confirming AD1896YRS's effectiveness as a jitter-cleansing stage in sensitive audio signal chains.

Can multiple AD1896YRS devices be synchronized for multi-channel phase-coherent operation?

Yes, the AD1896YRS supports matched-phase daisy-chain mode. One device acts as master, broadcasting its measured sample rate ratio to slave devices via the TDM_IN pin. This eliminates group delay variation between units - critical for multi-channel studio interfaces and automotive active noise cancellation systems. Unlike software-synchronized alternatives, this hardware-based method ensures deterministic, cycle-accurate phase alignment without host processor involvement, a capability uniquely implemented in AD1896YRS among second-generation ASRCs.

What package and temperature rating does the AD1896YRS have?

The AD1896YRS is supplied in a 28-lead SSOP (RS-28) package with 0.65 mm lead pitch and is rated for operation from –40°C to +105°C. This automotive-grade qualification is explicitly stated in the Ordering Guide and Absolute Maximum Ratings sections of the datasheet. The package supports standard reflow soldering profiles and features θ_JA = 109°C/W, enabling reliable thermal performance in compact, high-density PCB layouts typical of modern head units and broadcast encoders using AD1896YRS.