Analog Devices Inc. AD7386BCPZ-RL7

Overview

AD7386BCPZ-RL7 from Analog Devices is a 16-bit, dual simultaneous sampling SAR ADC with 4-channel single-ended inputs, 4 MSPS throughput, ±1.5 LSB INL (typ), and 87.5 dB SNR (VREF = 3.3 V external), designed for high-precision motor control current sense and position feedback systems requiring synchronized dual-channel acquisition.

For engineers reviewing the AD7386BCPZ-RL7 datasheet, AD7386BCPZ-RL7 pinout, AD7386BCPZ-RL7 application, or AD7386BCPZ-RL7 equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and timing behavior across −40°C to +125°C, and real-world oversampling performance metrics including 93 dB SNR at OSR = 8 with internal 2.5 V reference.

Technical Context

The AD7386BCPZ-RL7 integrates two independent 16-bit SAR ADCs with on-chip channel sequencer, 2.5 V internal reference (10 ppm/°C max), and programmable oversampling (normal or rolling average) to boost effective resolution and suppress noise without external filtering. It supports 1.8 V/2.5 V/3.3 V logic interfaces via separate VLOGIC supply.

Conversion is initiated on CS falling edge; data is read via SPI-compatible 3-wire interface (SDOA/SDOB/ALERT, SDI, SCLK) with low-latency readback and register-based configuration. Aperture jitter is 20 ps, aperture delay match is 450 ps, and input bandwidth reaches 22 MHz (−3 dB), enabling accurate capture of fast transient signals in power quality monitoring.

Key Specifications

Pinout & Package

AD7386BCPZ-RL7 is housed in a 16-lead, 3 mm × 3 mm LFCSP package with exposed pad (EPAD) requiring connection to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7387BCPZ-RL7 and AD7388BCPZ-RL7, the AD7386BCPZ-RL7 provides the highest resolution and best SNR among the family, making it optimal for applications demanding >14.5 ENOB-such as precision motor position feedback and high-fidelity sonar signal conditioning-while retaining full software and hardware compatibility.

Availability

AD7386BCPZ-RL7 is available at Aetrix Electronics and suitable for motor control position feedback, motor control current sense, and power quality monitoring requiring stable component supply across automotive, industrial, and test equipment programs.

Supply support for AD7386BCPZ-RL7 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 precision instrumentation, industrial automation, and communications markets since 1965.

The AD7386BCPZ-RL7 belongs to the AD738x family of dual simultaneous sampling SAR ADCs, engineered specifically for real-time, phase-coherent acquisition in motor control, power electronics, and high-fidelity data acquisition systems.

FAQ

What is the maximum sampling rate of the AD7386BCPZ-RL7 in dual-channel simultaneous mode?

The AD7386BCPZ-RL7 achieves 4 MSPS in single channel pair mode-meaning both ADC A and ADC B sample simultaneously at up to 4 million conversions per second per channel. In alternating channel mode (SEQ = 1), the rate drops to 2 MSPS per channel. This is confirmed in Table 1 of the Rev. A datasheet under "THROUGHPUT" with fSAMPLE = 4 MSPS and test condition "Single Channel Pair."

Does the AD7386BCPZ-RL7 support external reference voltage, and what is the valid range?

Yes, the AD7386BCPZ-RL7 supports external reference voltage applied to the REFIO pin. The valid range is 2.49 V to 3.4 V, as specified in Table 4 ("ALL DEVICES") under "REFERENCE INPUT AND OUTPUT." Operation with 3.3 V external reference yields 87.5 dB typical SNR and is explicitly characterized in the AD7386 section (Table 1, AC ACCURACY).

How does the oversampling feature improve performance in the AD7386BCPZ-RL7?

The AD7386BCPZ-RL7 implements two oversampling modes: normal averaging and rolling average. At OSR = 8 with internal 2.5 V reference, rolling average boosts SNR from 85.5 dB to 93 dB-a 7.5 dB improvement-equivalent to ~1.25 extra bits of ENOB. This is measured and documented in Figure 10 and Table 1 (Oversampled Dynamic Range row).

What is the operating temperature range for the AD7386BCPZ-RL7, and is it automotive-qualified?

The AD7386BCPZ-RL7 is specified for operation from −40°C to +125°C, as stated in the General Description and Absolute Maximum Ratings (Table 6). While not AEC-Q100 certified, its extended temperature rating and tested performance across this range make it suitable for under-hood automotive motor control and industrial drive applications where full qualification is managed at the system level.

Can the AD7386BCPZ-RL7 interface directly with a 1.8 V microcontroller?

Yes, the AD7386BCPZ-RL7 supports 1.8 V logic interfaces via its dedicated VLOGIC supply pin (Pin 2), which accepts 1.65 V to 3.6 V. When VLOGIC = 1.8 V, digital inputs (CS, SDI, SCLK) recognize VIH ≥ 1.44 V and VIL ≤ 0.36 V, and outputs (SDOA, SDOB/ALERT) drive VOH ≥ 1.5 V and VOL ≤ 0.4 V-ensuring reliable communication with 1.8 V MCUs without level shifters.