Analog Devices Inc. AD4680BCPZ-RL7

Overview

AD4680BCPZ-RL7 from Analog Devices is a 16-bit, dual simultaneous sampling, differential-input SAR ADC with 1 MSPS throughput, 92.5 dB SNR (VREF = 3.3 V), ±1.5 LSB INL max, and integrated 2.5 V reference (10 ppm/°C). It operates from −40°C to +125°C in motor control current sense and I/Q demodulation systems.

For engineers reviewing the AD4680BCPZ-RL7 datasheet, AD4680BCPZ-RL7 pinout, AD4680BCPZ-RL7 application, or AD4680BCPZ-RL7 equivalent, key selection factors include dual-channel simultaneity, oversampling support (up to 8×), alert function for threshold violation, 3 mm × 3 mm LFCSP package, and compatibility with 1.8 V/2.5 V/3.3 V logic interfaces.

Technical Context

The AD4680BCPZ-RL7 implements two independent SAR cores with fully differential analog inputs (AINA±, AINB±), sampled on the falling edge of CS. Its on-chip oversampling block supports rolling average mode and resolution boost (up to 18-bit effective), improving dynamic range without external processing.

It features a buffered internal 2.5 V reference (10 ppm/°C) accessible via REFIO, or accepts external references from 2.5 V to 3.3 V. The serial interface uses SCLK, CS, SDI, SDOA, and SDOB/ALERT pins with configurable timing and CRC support, enabling low-latency readback and register-based configuration.

Key Specifications

Pinout & Package

AD4680BCPZ-RL7 is housed in a 3 mm × 3 mm, 16-lead LFCSP (CP-16-451) with exposed pad (EPAD) requiring connection to ground 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 AD4680BCPZ-RL7, AD7380BCPZ-RL7 offers higher speed but sacrifices simultaneity and integrated reference, while AD4003BRMZ-RL7 reduces cost and power at the expense of channel count, alert capability, and advanced processing features - making AD4680BCPZ-RL7 optimal for time-critical dual-signal acquisition with built-in signal conditioning.

Availability

AD4680BCPZ-RL7 is available at Aetrix Electronics and suitable for motor control position feedback, power quality monitoring, and I/Q demodulation requiring stable component supply across automotive, industrial, and test equipment programs.

Supply support for AD4680BCPZ-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.

The AD4680BCPZ-RL7 belongs to Analog Devices' high-speed precision SAR ADC product line, designed specifically for demanding real-time control and measurement applications requiring dual-channel simultaneity, low latency, and robust noise immunity.

FAQ

What is the maximum sampling rate supported by the AD4680BCPZ-RL7?

The AD4680BCPZ-RL7 supports a maximum throughput rate of 1 MSPS, as confirmed in the Rev. A datasheet Table 2. This rate applies under standard operating conditions (VCC = 3.0–3.6 V, TA = −40°C to +125°C, no oversampling enabled). The device achieves this speed with dual simultaneous sampling, meaning both channels complete conversion every 1 µs. The AD4680BCPZ-RL7 is distinct from the pin-compatible AD4681, which operates at 500 kSPS.

Does the AD4680BCPZ-RL7 include an internal voltage reference?

Yes, the AD4680BCPZ-RL7 integrates a buffered 2.5 V internal reference with 10 ppm/°C temperature coefficient, specified over −40°C to +125°C. This reference is available on the REFIO pin and can be used directly or disabled to accept an external reference from 2.5 V to 3.3 V. The internal reference eliminates the need for an external reference IC in many applications, reducing BOM count and board area.

How does the alert function work on the AD4680BCPZ-RL7?

The AD4680BCPZ-RL7 provides an alert function on the SDOB/ALERT pin, which asserts low when a conversion result exceeds user-programmed high or low thresholds stored in the ALERT_HIGH_THRESHOLD and ALERT_LOW_THRESHOLD registers. Alert status is latched until cleared via register write or CS pulse. This hardware interrupt reduces host processor polling overhead and enables rapid fault response in safety-critical systems like motor drives.

What package type and dimensions does the AD4680BCPZ-RL7 use?

The AD4680BCPZ-RL7 is packaged in a 3 mm × 3 mm, 16-lead LFCSP (CP-16-451) with exposed pad (EPAD). Per the datasheet Pin Configuration section, the EPAD must be soldered to the PCB ground plane for thermal dissipation and electrical stability. The package has a θJA of 55.4°C/W and θJC of 12.7°C/W under JEDEC 2S2P test conditions.

Can the AD4680BCPZ-RL7 perform oversampling, and what benefit does it provide?

Yes, the AD4680BCPZ-RL7 includes an on-chip oversampling block supporting ratios up to 8×. At 8× OSR with RES = 1, SNR improves to 100 dB (typical, VREF = 3.3 V), a 7.5 dB gain over the base 92.5 dB. Oversampling reduces in-band noise and relaxes anti-aliasing filter requirements, enabling higher effective resolution without external DSP resources - particularly valuable in power quality and audio test applications.