Analog Devices Inc. AD7689CCPZRL7

Overview

AD7689CCPZRL7 from Analog Devices is an 8-channel, 16-bit, 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, delivers ±0.4 LSB typical INL and 92.5 dB SINAD at 20 kHz, and targets multichannel data acquisition in battery-powered medical instruments and industrial monitoring systems.

For engineers reviewing the AD7689CCPZRL7 datasheet, AD7689CCPZRL7 pinout, AD7689CCPZRL7 application, or AD7689CCPZRL7 equivalent, key selection considerations include its 8-channel differential/unipolar/pseudobipolar input flexibility, −40°C to +125°C extended temperature rating (AD7689C grade), no pipeline delay architecture, 50 nA standby current, and LFCSP-20 package compatibility with high-density PCB layouts.

Technical Context

The AD7689CCPZRL7 implements a charge redistribution SAR architecture with no pipeline delay, enabling deterministic conversion timing and immediate result availability after CNV rising edge. Its on-chip 8-channel analog multiplexer supports configurable input modes-unipolar single-ended, differential (GND sense), and pseudobipolar-with channel sequencer and selectable 1-pole filter for scan-based acquisition.

It integrates a buffered internal reference (2.5 V or 4.096 V), a dedicated temperature sensor output routed to a multiplexer channel, and independent VIO supply (1.8 V to 5.5 V) for logic-level compatibility. Power dissipation scales linearly with throughput: 3.5 mW at 2.5 V/200 kSPS and 12.5 mW at 5 V/250 kSPS.

Key Specifications

Pinout & Package

AD7689CCPZRL7 is housed in a 20-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed pad. The package supports fine-pitch PCB assembly and provides low thermal resistance (θJA = 48°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7689CCPZRL7, AD7699BCPZRL7 trades power efficiency and integration for speed, while ADS8689IPWR sacrifices throughput for analog front-end flexibility - AD7689CCPZRL7 uniquely balances 250 kSPS, internal reference, temperature sensing, and ultra-low standby current in a compact 4 mm × 4 mm package.

Availability

AD7689CCPZRL7 is available at Aetrix Electronics and suitable for medical instrumentation, industrial process control, and battery-powered test equipment requiring stable component supply, extended temperature operation, and high-accuracy multichannel data acquisition.

Supply support for AD7689CCPZRL7 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 AD7689CCPZRL7 belongs to Analog Devices' PulSAR® family of precision SAR ADCs, designed specifically for low-power, multichannel data acquisition systems where accuracy, integration, and small footprint are critical.

FAQ

What is the operating temperature range specified for AD7689CCPZRL7?

The AD7689CCPZRL7 is the AD7689C-grade variant, guaranteed for full performance from −40°C to +125°C. This extended temperature range is explicitly defined in Table 3 of the Rev. K datasheet and qualifies the device for use in automotive under-hood, industrial motor drives, and outdoor infrastructure applications where ambient temperatures exceed +85°C.

Does AD7689CCPZRL7 support differential input configurations?

Yes, AD7689CCPZRL7 supports true differential input mode using any two adjacent channels (e.g., IN0–IN1) referenced to COM, with GND-sense capability. The multiplexer allows per-channel configuration via the CFG register, and differential mode achieves −125 dB crosstalk at 100 kHz - confirmed in Table 2 and General Description section of the datasheet.

Can AD7689CCPZRL7 operate with a 1.8 V digital interface supply?

Yes, AD7689CCPZRL7 supports VIO from 1.8 V to VDD, enabling direct connection to 1.8 V FPGA or microcontroller I/O banks. Logic thresholds scale accordingly (VIH = 0.7 × VIO), and timing parameters such as tDSDO are characterized down to 1.8 V - see Tables 5 and 6 for validated 1.8 V operation limits.

How is the internal temperature sensor accessed in AD7689CCPZRL7?

The internal temperature sensor in AD7689CCPZRL7 is routed to a dedicated multiplexer input channel (TEMP). To read it, configure the channel sequencer or CFG register to select the TEMP channel, then perform a standard conversion. Output is 283 mV at 25°C with 1 mV/°C sensitivity - documented in Table 4 and Functional Block Diagram.

What package type does AD7689CCPZRL7 use, and is it RoHS compliant?

AD7689CCPZRL7 uses a 20-lead, 4 mm × 4 mm lead frame chip scale package (LFCSP) with exposed pad (CCPZ suffix). It is RoHS compliant and halogen-free, as confirmed in the Ordering Guide (page 37) and Analog Devices' official product page for AD7689CCPZRL7.