Analog Devices Inc. AD7383BCPZ-RL

Overview

AD7383BCPZ-RL from Analog Devices is a dual, simultaneous-sampling, 16-bit SAR analog-to-digital converter with pseudo-differential inputs, 4 MSPS throughput, 87.5 dB SNR (VREF = 3.3 V), ±2.5 LSB INL, and integrated oversampling for enhanced dynamic range in motor control position feedback and power quality monitoring systems.

For engineers reviewing the AD7383BCPZ-RL datasheet, AD7383BCPZ-RL pinout, AD7383BCPZ-RL application, or AD7383BCPZ-RL equivalent, this page delivers verified specifications, validated pin functions, confirmed thermal and timing behavior across −40°C to +125°C, and real-world alternative part comparisons for high-speed industrial data acquisition designs.

Technical Context

The AD7383BCPZ-RL implements two independent successive approximation register (SAR) ADC cores sharing a common reference and clock domain, enabling true simultaneous sampling of two pseudo-differential analog channels (AINA±, AINB±) on the falling edge of CS. Its internal 2.5 V reference or external 2.49 V–3.4 V reference supports flexible system-level voltage scaling.

It integrates configurable oversampling (OSR up to 8) and resolution boost (RES = 1) modes that deliver up to 93.4 dB SNR at reduced bandwidth, while maintaining low-latency serial readback via dual SDO outputs (SDOA, SDOB/ALERT) compatible with 1.65 V–3.6 V logic interfaces.

Key Specifications

Pinout & Package

AD7383BCPZ-RL is housed in a 16-lead LFCSP package (3 mm × 3 mm, CP-16-451) with exposed pad 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, high-speed SAR ADC applications.

Compared with AD7383BCPZ-RL, AD7384BCPZ-RL offers lower power (105.6 mW) and relaxed linearity at reduced resolution, while AD7380BCPZ-RL trades built-in flexibility for higher analog input common-mode rejection-neither provides the same combination of pseudo-differential simplicity, on-chip oversampling, and hardware alert capability.

Availability

AD7383BCPZ-RL is available at Aetrix Electronics and suitable for motor control position feedback, power quality monitoring, sonar signal processing, and EDFA bias control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7383BCPZ-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 semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7383 forms part of Analog Devices' high-speed SAR ADC portfolio designed specifically for real-time, multi-channel data acquisition in space-constrained, thermally demanding applications such as motor drives and optical networking equipment.

FAQ

What is the maximum supported external reference voltage for AD7383BCPZ-RL?

The AD7383BCPZ-RL 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 (87.5 dB) and dynamic range (87.9 dB), as specified in Table 2 of the datasheet. Reference current draw is 0.47 mA to 0.51 mA, requiring proper decoupling with a 1 µF capacitor to GND.

Does AD7383BCPZ-RL support true differential input signals?

No, AD7383BCPZ-RL uses pseudo-differential analog inputs: each channel (AINA±, AINB±) consists of a dedicated positive input (AINx+) and a shared common-mode reference point (AINx−), typically tied to VREF/2. It does not support fully differential signals spanning ±VREF; the absolute input voltage range is −0.1 V to VREF + 0.1 V relative to GND.

How does the oversampling feature improve performance in AD7383BCPZ-RL?

Oversampling in AD7383BCPZ-RL (OSR up to 8) averages multiple samples to reduce quantization noise, increasing effective SNR by up to 5.9 dB (e.g., 93.4 dB at OSR = 8, RES = 1). This allows lower bandwidth applications to achieve higher resolution without external filtering or post-processing, directly reducing SCLK speed requirements and system-level noise sensitivity.

What is the purpose of the SDOB/ALERT pin on AD7383BCPZ-RL?

The SDOB/ALERT pin on AD7383BCPZ-RL serves dual functionality: as SDOB, it outputs conversion results from ADC B; as ALERT, it asserts a low-active signal when a conversion result exceeds user-defined thresholds stored in ALERT_LOW_THRESHOLD and ALERT_HIGH_THRESHOLD registers. Enabling ALERT requires setting ALERT_EN = 1 in CONFIGURATION1 and SDO = 1 in CONFIGURATION2.

Is AD7383BCPZ-RL pin-compatible with other devices in the AD738x family?

Yes, AD7383BCPZ-RL is fully pin-compatible with AD7384BCPZ-RL (14-bit) and AD7380BCPZ-RL (16-bit differential), sharing identical 16-lead LFCSP packaging, pin assignments, and timing specifications. However, functional differences exist: AD7384 omits resolution boost, and AD7380 uses differential rather than pseudo-differential inputs and lacks oversampling.