Analog Devices Inc. AD7357WYRUZ

Overview

AD7357WYRUZ from Analog Devices is a dual, 14-bit, simultaneous-sampling SAR ADC with differential inputs, 4.2 MSPS per channel throughput, on-chip 2.048 V ±0.25% reference, and operation over −40°C to +125°C. It delivers 76.5 dB SNR and −80 dB THD at 500 kHz input, supporting high-fidelity I/Q demodulation in automotive radar front-ends.

For engineers reviewing the AD7357WYRUZ datasheet, AD7357WYRUZ pinout, AD7357WYRUZ application, or AD7357WYRUZ equivalent, key selection considerations include guaranteed simultaneous sampling accuracy, ADC-to-ADC isolation of −100 dB, dual independent serial data outputs (SDATAA/SDATAB), and automotive-grade thermal stability (6 ppm/°C reference drift).

Technical Context

The AD7357WYRUZ integrates two fully independent successive approximation ADCs, each with a dedicated track-and-hold amplifier supporting >110 MHz full-power bandwidth. Sampling is synchronized by a single CS signal, ensuring precise inter-channel timing alignment critical for phase-coherent signal acquisition.

It employs a standard SPI-compatible serial interface with dual output lines enabling true parallel readout of both 14-bit conversion results-eliminating interleaving latency. Power management includes three modes: normal (36 mW), partial power-down (9.5 mW), and full power-down (16 µW), all operable across its full automotive temperature range.

Key Specifications

Pinout & Package

AD7357WYRUZ is packaged in a 16-lead TSSOP (RU-16) with exposed pad. Pin functions are validated per Analog Devices Rev. E datasheet Figure 2 and Table 5. All pins support automotive-grade reliability and thermal performance (θ_JA = 143°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel SAR ADC applications.

Compared with AD7357WYRUZ, AD7356BRUZ trades resolution and reference integration for higher throughput, while AD7352BRUZ offers lower cost and power at the expense of speed and extended temperature capability-neither matches AD7357WYRUZ's combination of 14-bit simultaneous sampling, on-chip reference, and automotive qualification.

Availability

AD7357WYRUZ is available at Aetrix Electronics and suitable for automotive radar, industrial motion control, and high-fidelity data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7357WYRUZ 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.

The AD7357WYRUZ belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for demanding applications requiring simultaneous multi-channel sampling, low power, and automotive-grade reliability-including radar, communications, and industrial automation.

FAQ

What is the maximum sampling frequency supported by the AD7357WYRUZ?

The AD7357WYRUZ supports a maximum throughput rate of 4.2 MSPS per channel. This is achieved with an SCLK frequency up to 80 MHz and corresponds to a conversion time of t₂ + 15.5 × t_SCLK. At this rate, the device consumes 36 mW and maintains full 14-bit performance including 76.5 dB SNR and −80 dB THD specifications across −40°C to +125°C.

Does the AD7357WYRUZ include an internal voltage reference?

Yes, the AD7357WYRUZ integrates a precision 2.048 V reference with ±0.25% initial accuracy and 6 ppm/°C temperature coefficient. This reference appears at the REFA and REFB pins and can be used directly or overdriven by an external reference within 2.048 V + 100 mV to VDD. The on-chip reference eliminates the need for external components in most applications and ensures consistent performance across temperature.

How does the AD7357WYRUZ achieve simultaneous sampling across both channels?

The AD7357WYRUZ achieves true simultaneous sampling using a shared CS input that triggers both track-and-hold amplifiers at the exact same instant. Its aperture delay match is specified at ≤40 ps, and ADC-to-ADC isolation is −100 dB, ensuring minimal timing skew and crosstalk. This architecture is validated in the AD7357WYRUZ datasheet under dynamic performance and timing specifications for automotive-grade operation.

What package options are available for the AD7357WYRUZ?

The AD7357WYRUZ is offered exclusively in a 16-lead TSSOP package (RU-16) with exposed pad, as confirmed in the Analog Devices ordering guide and Rev. E datasheet. While the AD7357 family includes an 18-lead LFCSP variant (e.g., AD7357YCPZ), the WYRUZ suffix denotes the TSSOP package and −40°C to +125°C Y-grade qualification. No LFCSP variant exists for the WYRUZ part number.

Can the AD7357WYRUZ operate with different logic voltage levels for digital interfacing?

Yes, the AD7357WYRUZ uses a dedicated VDRIVE pin (2.25 V to 3.6 V) to set digital I/O voltage levels independently from the 2.5 V analog supply (VDD). This allows seamless interfacing with 1.8 V, 2.5 V, or 3.3 V controllers without level-shifting circuitry. Timing parameters such as access and hold times are specified across the full VDRIVE range and temperature extremes.