Analog Devices Inc. AD7380BCPZ-RL7

Overview

AD7380BCPZ-RL7 from Analog Devices is a dual, simultaneous-sampling, 16-bit, 4 MSPS SAR ADC with fully differential analog inputs, 2.5 V internal reference, and on-chip oversampling for enhanced dynamic range-designed for high-precision motor current sensing and position feedback in industrial servo drives.

For engineers reviewing the AD7380BCPZ-RL7 datasheet, AD7380BCPZ-RL7 pinout, AD7380BCPZ-RL7 application, or AD7380BCPZ-RL7 equivalent, this page delivers verified specs including SNR (92.5 dB @ 3.3 V ref), INL (±2.0 LSB), aperture delay match (100 ps), 16-lead 3 mm × 3 mm LFCSP package, and dual-channel isolation (−110 dB).

Technical Context

The AD7380BCPZ-RL7 implements two independent SAR ADC cores sharing a common clock and control interface, enabling true simultaneous sampling of two differential input channels (AINA± and AINB±) with matched acquisition timing. Its integrated oversampling block supports OSR up to 16×, delivering 101 dB dynamic range when resolution boost is enabled.

It features a buffered 2.5 V internal reference (±10 ppm/°C TC) and accepts external references up to 3.3 V; digital I/O operates from a separate 1.65 V–3.6 V logic supply (VLOGIC), ensuring compatibility with 1.8 V/2.5 V/3.3 V host interfaces. Conversion is initiated by CS falling edge and synchronized to SCLK, with low-latency readback via dual serial outputs (SDOA and SDOB/ALERT).

Key Specifications

Pinout & Package

AD7380BCPZ-RL7 is housed in a 16-lead LFCSP package (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad requiring PCB ground connection per Analog Devices layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7381BCPZ-RL7, the AD7380BCPZ-RL7 provides 2 additional bits of resolution and +7 dB SNR-critical for closed-loop servo systems demanding <0.003% linearity. Versus ADS8900BRGER, it offers true dual-channel synchronization and 4× higher throughput, making it irreplaceable in real-time motor control and I/Q demodulation.

Availability

AD7380BCPZ-RL7 is available at Aetrix Electronics and suitable for industrial motor control, power quality analyzers, and sonar signal acquisition systems requiring stable component supply, long-term production continuity, and automotive-grade temperature operation (−40°C to +125°C).

Supply support for AD7380BCPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.

The AD7380BCPZ-RL7 belongs to Analog Devices' high-speed precision SAR ADC family designed specifically for real-time industrial automation, where simultaneous dual-channel sampling, low latency, and guaranteed linearity over extended temperature ranges are mandatory.

FAQ

What is the maximum supported external reference voltage for the AD7380BCPZ-RL7?

The AD7380BCPZ-RL7 accepts an external reference voltage from 2.49 V to 3.4 V on the REFIO pin. Operation with a 3.3 V external reference yields optimal SNR (92.5 dB typical) and improved dynamic range versus the internal 2.5 V reference. The device includes dedicated REFIO decoupling requirements (1 μF to GND) and load regulation spec (−106 ppm/mA) to maintain stability under varying reference current draw.

Does the AD7380BCPZ-RL7 support true simultaneous sampling of both ADC channels?

Yes, the AD7380BCPZ-RL7 performs true simultaneous sampling: both ADC A and ADC B acquire their respective differential inputs (AINA± and AINB±) at the exact same instant upon CS falling edge, with aperture delay match guaranteed ≤100 ps. This eliminates phase skew between channels-essential for accurate vector calculations in motor control and I/Q demodulation where timing alignment directly impacts system accuracy.

How does the oversampling function improve performance in the AD7380BCPZ-RL7?

The AD7380BCPZ-RL7's on-chip oversampling block increases effective resolution and dynamic range by averaging multiple conversions. At OSR = 16× with resolution boost enabled, SNR improves from 92.5 dB to 101 dB-equivalent to ~17-bit effective resolution-while reducing output data rate and relaxing anti-alias filter requirements. This allows designers to trade off speed for precision without external FPGA/DSP resources.

What is the purpose of the SDOB/ALERT pin on the AD7380BCPZ-RL7?

The SDOB/ALERT pin on the AD7380BCPZ-RL7 serves a dual role: as SDOB, it outputs conversion results from ADC B; as ALERT, it asserts low when either channel's result exceeds user-programmed high/low thresholds stored in ALERT_HIGH_THRESHOLD and ALERT_LOW_THRESHOLD registers. This hardware-level fault signaling enables immediate interrupt-driven response-critical for overcurrent protection in motor drives without software polling latency.

Can the AD7380BCPZ-RL7 operate with a 1.8 V logic interface?

Yes, the AD7380BCPZ-RL7 supports 1.8 V digital interface operation via its dedicated VLOGIC pin (1.65 V–3.6 V range). When VLOGIC = 1.8 V, input thresholds scale accordingly (VIH = 1.44 V, VIL = 0.36 V), and output drive strength remains compliant with 1.8 V CMOS levels (VOH ≥ 1.5 V, VOL ≤ 0.4 V). This eliminates level-shifting circuitry when interfacing with modern low-voltage microcontrollers and FPGAs.