Analog Devices Inc. AD7357YRUZ-500RL7

Overview

AD7357YRUZ-500RL7 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%), and differential input architecture optimized for I/Q demodulation and automotive radar signal acquisition.

For engineers reviewing the AD7357YRUZ-500RL7 datasheet, AD7357YRUZ-500RL7 pinout, AD7357YRUZ-500RL7 application, or AD7357YRUZ-500RL7 equivalent, key selection considerations include simultaneous dual-channel sampling accuracy, 110 MHz full-power bandwidth, −100 dB ADC-to-ADC isolation, and operation across −40°C to +125°C in TSSOP packaging.

Technical Context

The AD7357YRUZ-500RL7 integrates two independent successive approximation ADCs, each with a dedicated track-and-hold amplifier supporting >110 MHz analog input bandwidth and aperture jitter of 16 ps. Conversion is initiated on the falling edge of CS, with timing fully synchronized to SCLK up to 80 MHz.

It employs a single 2.5 V analog supply (VDD) and separate logic supply (VDRIVE, 2.25–3.6 V), enabling interface voltage flexibility. The on-chip 2.048 V reference features 6 ppm/°C drift and supports external overdrive between 2.148 V and VDD, with decoupling via REFA/REFB–REFGND capacitors.

Key Specifications

Pinout & Package

AD7357YRUZ-500RL7 is packaged in a 16-lead TSSOP (YRUZ suffix), with exposed pad for thermal enhancement. Pin functions are validated per Analog Devices Rev. E datasheet Figure 2 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 AD7357YRUZ-500RL7, AD7356BRUZ trades 2 bits of resolution for 0.8 MSPS higher throughput and no internal reference, while AD7266BRUZ offers simpler interface and lower power but sacrifices simultaneous sampling fidelity, temperature range, and channel isolation-making AD7357YRUZ-500RL7 the sole choice for demanding automotive radar and coherent I/Q systems.

Availability

AD7357YRUZ-500RL7 is available at Aetrix Electronics and suitable for automotive radar front-ends, industrial motion control systems, and high-fidelity I/Q demodulation receivers requiring stable component supply across extended temperature ranges.

Supply support for AD7357YRUZ-500RL7 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 AD7357YRUZ-500RL7 belongs to Analog Devices' high-speed precision SAR ADC product line, engineered specifically for simultaneous dual-channel acquisition in radar, communications, and industrial sensing applications demanding phase coherence and wide analog bandwidth.

FAQ

What is the operating temperature range of the AD7357YRUZ-500RL7?

The AD7357YRUZ-500RL7 is rated for −40°C to +125°C operation and is qualified to automotive standards. This Y-grade specification ensures reliable performance in under-hood radar modules and industrial environments where ambient temperatures exceed +85°C. The device maintains full 4.2 MSPS throughput and specified SNR/SINAD across this entire range.

Does the AD7357YRUZ-500RL7 require an external reference voltage?

No, the AD7357YRUZ-500RL7 includes an integrated 2.048 V reference with ±0.25% initial accuracy and 6 ppm/°C temperature coefficient. REFA and REFB pins provide access to this reference for system-level decoupling or external buffering. An external reference may be applied within 2.148 V to VDD, but it is not required for standard operation of the AD7357YRUZ-500RL7.

How does the AD7357YRUZ-500RL7 achieve simultaneous sampling across both channels?

The AD7357YRUZ-500RL7 uses a shared CS input to trigger conversion on both ADCs at the exact same instant. Each channel has its own dedicated track-and-hold amplifier, ensuring that the sampling aperture is aligned to within 40 ps (aperture delay match). This hardware-synchronized architecture eliminates time skew between I and Q paths, which is essential for preserving phase relationships in radar and communications systems using the AD7357YRUZ-500RL7.

What serial interface protocols does the AD7357YRUZ-500RL7 support?

The AD7357YRUZ-500RL7 supports SPI-, QSPI-, MICROWIRE-, and DSP-compatible serial interfaces. It uses a standard 4-wire interface (CS, SCLK, SDATAA, SDATAB) with data clocked on the falling edge of SCLK. The device accepts SCLK frequencies up to 80 MHz and outputs 14-bit MSB-first data preceded by two leading zeros, making it interoperable with most FPGA and microcontroller SPI peripherals without protocol translation.

Can the AD7357YRUZ-500RL7 operate with different analog and digital supply voltages?

Yes, the AD7357YRUZ-500RL7 separates analog and digital power domains: VDD (2.25–2.75 V) powers the analog core and reference, while VDRIVE (2.25–3.6 V) sets the logic I/O voltage level. This allows interfacing with 1.8 V, 2.5 V, or 3.3 V controllers without level shifters. The AD7357YRUZ-500RL7 datasheet specifies timing parameters across the full VDRIVE range, ensuring robust operation regardless of host controller voltage.