Analog Devices Inc. AD7357YRUZ

Overview

AD7357YRUZ from Analog Devices is a dual, 14-bit, simultaneous-sampling SAR ADC with 4.2 MSPS per channel throughput, 2.048 V on-chip reference (±0.25%), −40°C to +125°C operation, and differential input architecture optimized for I/Q demodulation and automotive radar signal acquisition.

For engineers reviewing the AD7357YRUZ datasheet, AD7357YRUZ pinout, AD7357YRUZ application, or AD7357YRUZ equivalent, this page delivers verified specifications, validated pin functions, real-world use scenarios, and confirmed alternative options for high-speed dual-channel data acquisition systems requiring precise timing correlation and low inter-ADC crosstalk.

Technical Context

The AD7357YRUZ integrates two independent successive approximation ADCs sharing a common SCLK and CS control interface, enabling true simultaneous sampling via synchronized track-and-hold circuits with 40 ps aperture delay match and −100 dB ADC-to-ADC isolation. Its analog front-end supports fully differential inputs referenced to ±VREF/2 with 110 MHz full-power bandwidth.

Conversion is initiated on the falling edge of CS, with latency fixed at 15.5 SCLK cycles plus t2; data appears MSB-first on SDATAA and SDATAB concurrently, each delivering 14-bit straight-binary output preceded by two leading zeros. The device operates natively at 2.5 V VDD and supports flexible logic-level interfacing via separate VDRIVE (2.25–3.6 V).

Key Specifications

Pinout & Package

AD7357YRUZ is packaged in a 16-lead TSSOP (YRUZ suffix denotes TSSOP, Y grade). The exposed pad is not internally connected but must be soldered to PCB for thermal and mechanical reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7356BRUZ, AD7357YRUZ trades 0.8 MSPS throughput for 2 extra bits of resolution and integrated reference-critical for radar dynamic range. Against AD7266BRUZ, it adds simultaneous dual-output, aperture match, and reference integration at higher power, making it superior for phase-coherent acquisition.

Availability

AD7357YRUZ is available at Aetrix Electronics and suitable for automotive radar front-ends, industrial motion control systems, and RF test equipment requiring stable component supply, extended temperature operation, and guaranteed long-term availability.

Supply support for AD7357YRUZ 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 since 1965.

The AD7357YRUZ belongs to Analog Devices' high-speed precision SAR ADC product line, engineered specifically for applications demanding simultaneous dual-channel acquisition with sub-picosecond timing correlation and robust RF signal integrity.

FAQ

What is the operating temperature range for AD7357YRUZ?

The AD7357YRUZ is rated for −40°C to +125°C operation (Y grade), qualified for under-hood automotive environments and industrial systems with wide ambient thermal swings. This rating is explicitly defined in the Ordering Guide and Absolute Maximum Ratings table of the Rev. E datasheet, and applies to both TSSOP and LFCSP variants bearing the Y suffix.

Does AD7357YRUZ require an external reference?

No, AD7357YRUZ includes an internal 2.048 V reference with ±0.25% accuracy at 25°C and 6 ppm/°C drift, sufficient for most precision applications. However, REFA and REFB pins support external reference overdrive from 2.148 V to VDD, enabling system-level reference sharing or improved stability when needed.

How does the dual-output interface of AD7357YRUZ work?

AD7357YRUZ outputs conversion results simultaneously on SDATAA and SDATAB pins. Each carries a 16-bit stream (two leading zeros + 14-bit result, MSB-first). Holding CS low for 18 SCLK cycles reads one channel; extending CS for another 18 cycles delivers the second channel's data on the same pin, enabling single-port microcontroller interfacing without multiplexing overhead.

What is the significance of ADC-to-ADC isolation in AD7357YRUZ?

AD7357YRUZ specifies −100 dB ADC-to-ADC isolation, meaning crosstalk from a full-scale 1 MHz signal on one channel induces less than 0.001% of that signal's power onto the other channel's output. This enables truly independent dual-channel acquisition in tightly coupled systems like I/Q receivers, where leakage would otherwise distort phase and amplitude relationships.

Can AD7357YRUZ operate with VDRIVE different from VDD?

Yes, AD7357YRUZ supports independent VDRIVE (2.25–3.6 V) and VDD (2.25–2.75 V) supplies. This allows interfacing with 1.8 V, 2.5 V, or 3.3 V logic families while maintaining optimal analog performance at 2.5 V VDD-critical for mixed-voltage FPGA or ASIC host systems without level shifters.