Analog Devices Inc. AD7384-4BCPZ-RL

Overview

AD7384-4BCPZ-RL from Analog Devices is a 14-bit, quad-channel, simultaneous-sampling SAR ADC with pseudo-differential inputs, 4 MSPS throughput, 83.5 dB typical SNR (VREF = 3.3 V), and integrated oversampling for up to 2-bit resolution boost - deployed in motor control current sensing and high-speed data acquisition systems.

For engineers reviewing the AD7384-4BCPZ-RL datasheet, AD7384-4BCPZ-RL pinout, AD7384-4BCPZ-RL application, or AD7384-4BCPZ-RL equivalent, key selection criteria include simultaneous 4-channel sampling at 4 MSPS, −40°C to +125°C operation, LFCSP-24 package compatibility, and oversampling-enabled dynamic range extension to 91.3 dB.

Technical Context

The AD7384-4BCPZ-RL implements four independent successive approximation register (SAR) cores with shared control logic and a unified serial interface. Each channel uses a pseudo-differential input structure referenced to VREF/2, with 18 pF track-mode input capacitance and 5 pF hold-mode capacitance.

It supports dual reference modes: internal 2.5 V buffered reference (±10 ppm/°C drift) or external 2.5 V–3.3 V reference, selectable via CONFIGURATION1 register. Oversampling operates in normal averaging or rolling average mode, delivering up to 2-bit effective resolution enhancement and reducing SCLK speed requirements.

Key Specifications

Pinout & Package

AD7384-4BCPZ-RL is housed in a 24-lead, 4 mm × 4 mm LFCSP (CP-24-251) with exposed pad (EPAD) requiring GND connection for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad SAR ADC applications.

Compared with AD7384-4BCPZ-RL, AD7383-4BCPZ-RL trades oversampling headroom for superior DC accuracy, while AD7381-4BCPZ-RL reduces footprint and power at the expense of throughput and dynamic range flexibility.

Availability

AD7384-4BCPZ-RL is available at Aetrix Electronics and suitable for motor control position feedback, EDFA monitoring, and high-speed data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7384-4BCPZ-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.

The AD7384-4BCPZ-RL belongs to the AD738x-4 family of quad simultaneous-sampling SAR ADCs, engineered for high-fidelity, time-coherent multi-channel acquisition in demanding real-time control and instrumentation applications.

FAQ

What is the maximum sampling rate supported by the AD7384-4BCPZ-RL?

The AD7384-4BCPZ-RL supports a maximum throughput rate of 4 MSPS per channel with simultaneous sampling across all four channels. This is achieved using a single CS signal triggering concurrent conversions, with conversion time specified at 190 ns and tCYC at 250 ns. The device maintains this rate across its full operating temperature range of −40°C to +125°C.

Does the AD7384-4BCPZ-RL include an internal voltage reference?

Yes, the AD7384-4BCPZ-RL integrates a buffered 2.5 V internal reference with ±10 ppm/°C temperature coefficient and 7 µV RMS noise. It can be used directly or buffered externally. When enabled, it appears on the REFIO pin and requires a 1 µF decoupling capacitor. The internal reference supports full 14-bit performance and eliminates need for external reference components in many applications.

How does oversampling work on the AD7384-4BCPZ-RL and what benefit does it provide?

The AD7384-4BCPZ-RL implements on-chip oversampling in normal averaging or rolling average modes, supporting OSR up to 8×. With OSR = 8× and RES = 1, it delivers 91.3 dB SNR - a 7.8 dB improvement over base performance. This effectively boosts resolution by up to 2 bits and reduces required SCLK frequency, easing timing constraints on host processors interfacing with AD7384-4BCPZ-RL.

What package type and pin count does the AD7384-4BCPZ-RL use?

The AD7384-4BCPZ-RL uses a 24-lead, 4 mm × 4 mm LFCSP (CP-24-251) package with exposed pad (EPAD). The EPAD must be soldered to a GND plane for thermal dissipation and electrical stability. Pin functions include four pseudo-differential analog input pairs, four serial data outputs (SDOA–SDOD), CS, SCLK, SDI, VCC, VLOGIC, REFCAP, REGCAP, REFIO, and multiple GND connections.

Can the AD7384-4BCPZ-RL operate with different logic voltage levels?

Yes, the AD7384-4BCPZ-RL features a separate VLOGIC supply (1.65 V–3.6 V) that independently powers its digital interface, enabling seamless interoperability with 1.8 V, 2.5 V, and 3.3 V microcontrollers and FPGAs. Digital inputs (CS, SCLK, SDI) accept logic thresholds scaled to VLOGIC, and outputs (SDOA–SDOD/ALERT) drive to VLOGIC − 0.3 V high level, ensuring robust signal integrity across mixed-voltage systems using AD7384-4BCPZ-RL.