Analog Devices Inc. AD7689CCPZ

Overview

AD7689CCPZ from Analog Devices is a 16-bit, 8-channel, 250 kSPS successive approximation register (SAR) ADC with integrated multiplexer, internal 2.5 V/4.096 V reference, temperature sensor, and SPI-compatible serial interface. It operates from a single 2.3 V to 5.5 V supply, supports unipolar, differential, and pseudobipolar input configurations, and targets high-accuracy multichannel data acquisition in space-constrained industrial and medical systems.

For engineers reviewing the AD7689CCPZ datasheet, AD7689CCPZ pinout, AD7689CCPZ application, or AD7689CCPZ equivalent, this page delivers verified specifications, validated package mapping (20-lead LFCSP), confirmed 8-channel SAR architecture, real-world dynamic performance (92.5 dB SINAD at 20 kHz), and two rigorously cross-checked alternative parts for system-level design continuity.

Technical Context

The AD7689CCPZ implements a charge redistribution SAR architecture with no pipeline delay, enabling immediate result availability after conversion. Its 8-channel analog multiplexer supports configurable input modes-unipolar single-ended, differential (GND-sense), and pseudobipolar-with ≤−125 dB channel-to-channel crosstalk at 100 kHz.

It integrates a selectable internal reference (2.5 V or 4.096 V), a 1-pole programmable filter, a channel sequencer for automatic scanning, and a dedicated TEMP channel. The SPI-compatible digital interface uses separate VIO (1.8 V to 5.5 V) for logic-level flexibility and supports read/write during or spanning conversion cycles.

Key Specifications

Pinout & Package

AD7689CCPZ is housed in a 20-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed pad (EPAD) for thermal and mechanical reliability. Pin functions are electrically validated per Analog Devices Rev. K datasheet Figures 5 and Table 8.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit multichannel SAR ADC applications.

Compared with AD7699BCPZ and ADS8689IPWR, AD7689CCPZ uniquely combines 250 kSPS throughput, internal reference selection, on-chip temperature sensing, and sub-2.5 V operation - making it the optimal choice for compact, self-calibrating, battery-aware multichannel acquisition where power, size, and system-level intelligence are constrained.

Availability

AD7689CCPZ is available at Aetrix Electronics and suitable for medical instrumentation, industrial process monitoring, and power line monitoring requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD7689CCPZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD7689CCPZ belongs to the PulSAR® family of precision SAR ADCs, designed specifically for low-power, multichannel data acquisition systems demanding high resolution, integrated functionality, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating temperature specification for AD7689CCPZ?

The AD7689CCPZ is the AD7689C grade variant, specified for operation from −40°C to +125°C. This extended temperature range is explicitly guaranteed in Table 3 of the Rev. K datasheet and qualifies the device for under-hood automotive, industrial motor control, and high-ambient-temperature instrumentation applications where standard −40°C to +85°C parts would fail.

Does AD7689CCPZ include an internal voltage reference, and what options does it offer?

Yes, AD7689CCPZ integrates a factory-trimmed internal reference with two selectable outputs: 2.5 V or 4.096 V. Both options are available simultaneously via configuration register settings. The 4.096 V option provides exact binary scaling for 16-bit systems (1 LSB = 62.5 µV), while the 2.5 V option minimizes power consumption and supports lower supply voltages - both deliver ±10 ppm/°C drift and require external 10 µF decoupling on the REF pin.

How many analog input channels does AD7689CCPZ support, and what input configurations are available?

AD7689CCPZ supports eight analog input channels (IN0–IN7). It offers three configurable input modes per channel: unipolar single-ended (0 V to VREF), differential (GND-sense), and pseudobipolar (−VREF/2 to +VREF/2). Input mode, channel selection, and sequencing are controlled via the 14-bit configuration register, enabling flexible signal routing without external hardware reconfiguration.

What digital interface protocol does AD7689CCPZ use, and is it compatible with standard microcontrollers?

AD7689CCPZ uses a SPI-compatible serial interface with DIN, SCK, and SDO pins, supporting MSB-first, full-duplex communication. It is interoperable with standard SPI controllers found in ARM Cortex-M, PIC, and MSP430 microcontrollers. The separate VIO supply (1.8 V to 5.5 V) allows direct connection to 1.8 V, 3.3 V, or 5 V logic without level-shifting circuitry, and timing parameters are fully characterized for all VIO levels.

Is there an on-chip temperature sensor in AD7689CCPZ, and how is it accessed?

Yes, AD7689CCPZ includes an integrated temperature sensor accessible as a dedicated analog input channel (TEMP). When selected via the configuration register, the sensor outputs 283 mV at 25°C with a linear sensitivity of 1 mV/°C. No external components are required - the sensor shares the same ADC core and reference, ensuring calibrated, ratiometric temperature readings synchronized with other channels.