Analog Devices Inc. AD7357WYRUZ-RL

Overview

AD7357WYRUZ-RL 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 for automotive radar and I/Q demodulation systems.

For engineers reviewing the AD7357WYRUZ-RL datasheet, AD7357WYRUZ-RL pinout, AD7357WYRUZ-RL application, or AD7357WYRUZ-RL equivalent, key selection criteria include simultaneous sampling accuracy, ADC-to-ADC isolation (−100 dB), SNR (74.5 dB min), full-power bandwidth (110 MHz), and TSSOP/LFCSP package compatibility in high-reliability automotive environments.

Technical Context

The AD7357WYRUZ-RL integrates two independent successive approximation ADCs, each with a dedicated track-and-hold amplifier supporting >110 MHz input frequencies and aperture jitter of 16 ps. Conversion is initiated on the falling edge of CS, with timing fully synchronized to SCLK.

It supports SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface with dual data outputs (SDATAA/SDATAB), enabling simultaneous readout of both channels. The device uses a single 2.5 V analog supply (VDD) and separate logic supply (VDRIVE, 2.25–3.6 V), with internal reference decoupling via REFA/REFB and REFGND pins.

Key Specifications

Pinout & Package

The AD7357WYRUZ-RL is available in a 16-lead TSSOP package (RUZ suffix) with exposed pad for thermal enhancement. Pin functions are validated per Analog Devices Rev. E datasheet Figures 2 and 3 and Table 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7356BRUZ and AD7352BRUZ, the AD7357WYRUZ-RL delivers 2 extra bits of resolution and guaranteed −40°C to +125°C operation-critical for automotive radar and high-fidelity motion control where thermal stability and dynamic range directly impact system-level accuracy.

Availability

AD7357WYRUZ-RL is available at Aetrix Electronics and suitable for automotive radar, motion control, and I/Q demodulation applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for AD7357WYRUZ-RL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The AD7357WYRUZ-RL belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for time-critical, multi-channel data acquisition in automotive radar, motor control, and communications infrastructure.

FAQ

What is the operating temperature range of the AD7357WYRUZ-RL?

The AD7357WYRUZ-RL is rated for −40°C to +125°C operation, meeting automotive-grade requirements. This Y-grade specification is explicitly confirmed in the Rev. E datasheet Table 2 and Absolute Maximum Ratings section, distinguishing it from the B-grade (−40°C to +85°C) variants. The extended range ensures reliability in under-hood radar modules and industrial motor drives.

Does the AD7357WYRUZ-RL include an internal voltage reference?

Yes, the AD7357WYRUZ-RL integrates a 2.048 V ±0.25% internal reference with 6 ppm/°C temperature coefficient, as specified in the Rev. E datasheet Table 2 and General Description. The reference is accessible via REFA and REFB pins and can be overdriven by an external source within 2.048 V + 0.1 V to VDD.

How does the AD7357WYRUZ-RL achieve simultaneous sampling across both channels?

The AD7357WYRUZ-RL achieves true simultaneous sampling using two independent track-and-hold amplifiers, each preceding its own SAR ADC core. As stated in the Product Highlights and Functional Block Diagram, a single CS falling edge triggers acquisition and conversion on both channels at the exact same instant, with aperture delay match of 40 ps ensuring temporal alignment.

What package types are offered for the AD7357WYRUZ-RL?

The AD7357WYRUZ-RL is supplied in a 16-lead TSSOP package (RUZ suffix), as confirmed by the ordering guide in the Rev. E datasheet Page 24 and Pin Configuration Figure 2. While the AD7357 family also offers an 18-lead LFCSP variant, the RUZ suffix specifically denotes the TSSOP version with exposed thermal pad.

What is the ADC-to-ADC isolation performance of the AD7357WYRUZ-RL?

The AD7357WYRUZ-RL provides −100 dB ADC-to-ADC isolation, measured at fIN = 1 MHz with noise bandwidth 100 kHz to 2.5 MHz, as documented in Table 2 of the Rev. E datasheet. This isolation level prevents signal leakage between channels during simultaneous sampling of high-frequency I/Q or differential sensor pairs.

Can the AD7357WYRUZ-RL operate with different supply voltages for analog and digital interfaces?

Yes, the AD7357WYRUZ-RL supports independent supplies: VDD (2.25–2.75 V) powers the analog core, while VDRIVE (2.25–3.6 V) sets the logic interface voltage. This separation is detailed in Table 2 and Pin Function Descriptions, allowing optimization of noise immunity and timing margins in mixed-signal systems.