Analog Devices Inc. AD7477AWARMZ-RL

Overview

AD7477AWARMZ-RL from Analog Devices is a 10-bit, 1 MSPS successive-approximation ADC in a 6-lead SC70 package, operating from 2.35 V to 5.25 V supply. It delivers 61 dB SINAD at 100 kHz input, 7 ns aperture jitter, and 13.5 MHz full-power bandwidth - enabling high-fidelity signal capture in space-constrained battery-powered instrumentation.

For engineers reviewing the AD7477AWARMZ-RL datasheet, AD7477AWARMZ-RL pinout, AD7477AWARMZ-RL application, or AD7477AWARMZ-RL equivalent, this page provides verified technical context, SC70 package mapping, SPI-compatible serial interface timing, and validated automotive-grade alternatives for embedded data acquisition design.

Technical Context

The AD7477AWARMZ-RL implements a single-ended track-and-hold with 250 ns acquisition time and no pipeline delay, sampling on the falling edge of CS. Its conversion is fully controlled by SCLK (up to 20 MHz), requiring 14 clock cycles per result and supporting SPI/QSPI/MICROWIRE/DSP protocols.

Reference is internally derived from VDD, setting analog input range to 0 V to VDD. Power management includes full power-down mode (1 µA max) and dynamic current scaling - 1.7 mA at 1 MSPS with 2.35–3.6 V supply, dropping to 0.6 mA at 100 kSPS.

Key Specifications

Pinout & Package

AD7477AWARMZ-RL is housed in a 6-lead SC70 package (2.2 mm × 1.35 mm × 0.95 mm), optimized for ultra-compact PCB layouts and low thermal resistance (θJA = 340.2°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 10-bit SAR ADC applications.

Compared with ADS7822UID and MAX1116EUT+T, AD7477AWARMZ-RL uniquely combines 1 MSPS speed, 2.35 V minimum supply, automotive temperature rating, and SC70 thermal efficiency - making it the only option meeting all three requirements simultaneously in compact embedded systems.

Availability

AD7477AWARMZ-RL is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, optical sensor interfaces, and industrial motor control feedback requiring stable component supply across automotive and industrial temperature ranges.

Supply support for AD7477AWARMZ-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 technologies, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7476A/AD7477A/AD7478A family was designed specifically for space- and power-constrained data acquisition in portable and automotive systems - delivering high-speed SAR performance in the smallest possible footprint without sacrificing DC accuracy or dynamic range.

FAQ

What is the maximum sampling rate supported by the AD7477AWARMZ-RL?

The AD7477AWARMZ-RL supports a maximum throughput rate of 1 MSPS, achieved with a 20 MHz SCLK and 14 serial clock cycles per conversion. This rate is guaranteed across the full operating temperature range (−40°C to +85°C) and supply range (2.35 V to 5.25 V), with no pipeline delay affecting timing predictability in real-time control loops.

Does the AD7477AWARMZ-RL require an external voltage reference?

No, the AD7477AWARMZ-RL uses an internal reference derived from VDD, establishing a 0 V to VDD analog input range. This eliminates external reference components and simplifies layout, while maintaining 10-bit linearity (±0.5 LSB INL) and 61 dB SINAD performance without calibration.

How does the AD7477AWARMZ-RL manage power in low-duty-cycle applications?

The AD7477AWARMZ-RL features a full power-down mode drawing ≤1 µA, activated via CS deassertion. In active mode at 1 MSPS, it consumes 5.1 mW at 3 V. This dual-mode operation enables >10-year battery life in sensor nodes that sample once per minute, with conversion latency fixed at 700 ns regardless of duty cycle.

Is the AD7477AWARMZ-RL compatible with standard SPI microcontrollers?

Yes, the AD7477AWARMZ-RL is SPI/QSPI/MICROWIRE/DSP compatible. It outputs 10-bit data MSB-first with four leading zeros and two trailing zeros on SDATA, synchronized to SCLK falling edges. No special framing or protocol extensions are required - standard SPI master configuration (CPOL = 0, CPHA = 1) works out-of-the-box.

What package type and dimensions does the AD7477AWARMZ-RL use?

The AD7477AWARMZ-RL is supplied in a 6-lead SC70 package measuring 2.2 mm × 1.35 mm × 0.95 mm. Pinout is VDD–GND–VIN–CS–SDATA–SCLK (top view). This package offers superior thermal performance (θJA = 340.2°C/W) and board-area efficiency compared to MSOP-8 alternatives, with verified reflow compatibility per JEDEC J-STD-020.