Analog Devices Inc. AD7388BCPZ-RL

Overview

AD7388BCPZ-RL from Analog Devices is a 12-bit, dual simultaneous sampling SAR ADC with 4-channel input (two 2:1 multiplexed pairs), 4 MSPS throughput, ±0.2 LSB typical INL, and operation over −40°C to +125°C - used in motor control current sense and power quality monitoring systems requiring high channel-to-channel isolation (−111.6 dB) and low aperture jitter (20 ps).

For engineers reviewing the AD7388BCPZ-RL datasheet, AD7388BCPZ-RL pinout, AD7388BCPZ-RL application, or AD7388BCPZ-RL equivalent, this page delivers verified specs including oversampling SNR boost (up to 80.5 dB at OSR = 8), resolution-boost mode, internal 2.5 V reference (10 ppm/°C max), and alert function for threshold violation detection.

Technical Context

The AD7388BCPZ-RL implements two independent SAR ADC cores with synchronized sampling on AINA0/AINA1 and AINB0/AINB1, each paired with a 2:1 analog multiplexer. Its on-chip sequencer supports automatic channel cycling and oversampling modes (normal averaging or rolling average) with configurable OSR up to 32.

It features a buffered 2.5 V internal reference (10 ppm/°C max drift), supports external references up to 3.3 V, and uses a 3-wire SPI-compatible serial interface (CS, SCLK, SDI, SDOA, SDOB/ALERT) with programmable register access for configuration, alert thresholds, and resolution boost control.

Key Specifications

Pinout & Package

AD7388BCPZ-RL 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-simultaneous sampling ADC applications.

Compared with AD7387BCPZ-RL and AD7386BCPZ-RL, the AD7388BCPZ-RL offers optimal balance of speed, linearity (±0.2 LSB), and power efficiency (80–104 mW) for cost-sensitive industrial motor control and power monitoring - trading resolution for lower system cost and reduced FPGA/DSP processing load.

Availability

AD7388BCPZ-RL is available at Aetrix Electronics and suitable for motor control current sense, power quality monitoring, and sonar signal acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7388BCPZ-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 AD738x family targets high-speed, multi-channel data acquisition in space-constrained, thermally demanding environments - designed specifically for simultaneous sampling in motor control, power analytics, and real-time signal intelligence systems.

FAQ

What is the maximum sampling rate of the AD7388BCPZ-RL?

The AD7388BCPZ-RL achieves a maximum throughput rate of 4 MSPS when converting a single channel pair (e.g., AINA0/AINA1). In sequencer mode alternating between both ADCs, the effective rate per channel drops to 2 MSPS. This is confirmed in Table 3 of the Rev. A datasheet under "THROUGHPUT" with test condition fSAMPLE = 4 MSPS.

Does the AD7388BCPZ-RL include an internal voltage reference?

Yes, the AD7388BCPZ-RL integrates a buffered 2.5 V internal reference with a maximum temperature coefficient of 10 ppm/°C and 7 µV rms noise. It is accessible via the REFIO pin and stabilized using a 0.1 µF capacitor on REFCAP, as specified in Table 4 and Figure 7 of the datasheet.

How does the alert function work on the AD7388BCPZ-RL?

The AD7388BCPZ-RL uses the SDOB/ALERT pin to assert a low-level signal when a conversion result exceeds user-programmed high or low thresholds stored in the ALERT_HIGH_THRESHOLD and ALERT_LOW_THRESHOLD registers. The latency from violation to alert is 200 ns (tALERTS), per Table 5.

Can the AD7388BCPZ-RL perform oversampling, and what SNR improvement does it provide?

Yes, the AD7388BCPZ-RL supports both normal averaging and rolling average oversampling modes with OSR up to 32. At OSR = 8 in rolling average mode, SNR improves from 73.8 dB to 80.5 dB - a 6.7 dB gain corresponding to ~1.1-bit effective resolution increase, per Table 3 and Figure 22.

What is the operating temperature range for the AD7388BCPZ-RL?

The AD7388BCPZ-RL is fully specified for continuous operation from −40°C to +125°C, validated across all electrical parameters including INL, SNR, and timing. This range is explicitly stated in the General Description and confirmed in Absolute Maximum Ratings (Table 6) and performance plots (Figures 18–20).