Analog Devices Inc. AD4695BCPZ

Overview

AD4695BCPZ from Analog Devices is a 16-bit, 16-channel, 500 kSPS multiplexed SAR ADC with Easy Drive architecture, integrated oversampling (up to OSR = 64), ±1.0 LSB INL max, and on-chip reference buffer support - designed for photodiode monitoring and battery-powered precision data acquisition systems.

For engineers reviewing the AD4695BCPZ datasheet, AD4695BCPZ pinout, AD4695BCPZ application, or AD4695BCPZ equivalent, this page delivers verified specifications, package mapping to 32-lead 5 mm × 5 mm LFCSP, real-world channel sequencing behavior, and validated alternative options for multichannel industrial sensing and medical instrumentation.

Technical Context

The AD4695BCPZ implements a true 16-bit SAR core with no missing codes and features a low-crosstalk 16-channel analog multiplexer with overvoltage protection clamps (±5 mA per input) and long acquisition phase (715 ns at 1 MSPS). Its Easy Drive architecture enables analog input high-Z mode and reference input high-Z mode, reducing external driver requirements.

Digital functionality includes autonomous autocycle mode, customizable channel sequencer, on-chip oversampling/decimation, threshold detection with alert indicators, and dual-/quad-SDO SPI interface supporting 1.14 V–1.98 V logic. Internal LDO allows single 2.7 V–5.5 V analog supply operation across −40°C to +125°C.

Key Specifications

Pinout & Package

AD4695BCPZ is housed in a 32-lead, 5 mm × 5 mm lead frame chip scale package (LFCSP) with exposed thermal pad. Pin functions are defined per Analog Devices' Rev. B datasheet, Figure 14 (Pin Configuration).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD4695BCPZ, AD4696BCPZ delivers double the sample rate in identical hardware footprint but increases power by ~2× at full speed; ADS8688IPWR reduces channel count and removes integrated digital features, shifting complexity to host firmware and external analog circuitry.

Availability

AD4695BCPZ is available at Aetrix Electronics and suitable for photodiode monitoring, medical instrumentation, and battery-powered data loggers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD4695BCPZ 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 AD4695/AD4696 product line targets space-constrained, multichannel precision data acquisition systems - emphasizing low power, integrated digital intelligence, and robust analog front-end protection for harsh environments.

FAQ

What is the maximum sample rate supported by the AD4695BCPZ?

The AD4695BCPZ supports a maximum sample rate of 500 kSPS in standard conversion mode. This rate applies to the full 16-channel sequence, with each channel acquiring at up to 31.25 kSPS in round-robin mode. The device maintains guaranteed 16-bit no-missing-codes performance and ±1.0 LSB INL across its entire operating temperature range of −40°C to +125°C. The AD4695BCPZ achieves this without pipeline delay, delivering first-conversion accuracy on every acquisition cycle.

Does the AD4695BCPZ include an internal reference buffer?

The AD4695BCPZ does not include an internal reference buffer - that feature is exclusive to the WLCSP variant (e.g., AD4695BCPZ-RL7 in 36-ball WLCSP). The AD4695BCPZ uses the LFCSP package and relies on external reference buffering or high-Z reference input mode to reduce drive requirements. Its REF/REFIN pin accepts 2.4 V–5.1 V references directly, and reference input high-Z mode limits average current to just 12 µA at 1 MSPS, easing design of low-power reference circuits.

How does the Easy Drive feature reduce system component count in the AD4695BCPZ?

The Easy Drive feature in the AD4695BCPZ reduces system component count by enabling analog input high-Z mode and reference input high-Z mode - both of which drastically lower required drive strength. This eliminates the need for high-speed op-amp drivers before each analog input and removes external reference buffers in most configurations. As a result, a 16-channel system using AD4695BCPZ can achieve full performance with zero external op-amps on the analog path, cutting BOM cost and PCB area while improving channel density and thermal stability.

Can the AD4695BCPZ operate from a single 3.3 V supply?

Yes, the AD4695BCPZ can operate from a single 3.3 V supply applied to AVDD, with VIO set to 1.8 V for digital interface compatibility. Its internal LDO is configurable to accept 2.7 V–5.5 V on AVDD and generate clean internal rails, so no additional voltage regulation is needed for analog circuitry. The device draws only 0.73 mA AVDD current at 500 kSPS with Easy Drive enabled, resulting in ~2.4 mW total analog power - making it ideal for 3.3 V battery-powered systems where efficiency and simplicity are critical.

What packaging and thermal characteristics define the AD4695BCPZ?

The AD4695BCPZ is supplied in a 32-lead, 5 mm × 5 mm lead frame chip scale package (LFCSP) with exposed thermal pad. It has a thermal resistance θ_JA of 36°C/W (JEDEC standard, 2s2p layout) and is rated for operation from −40°C to +125°C ambient. The package supports reflow soldering per J-STD-020, and the exposed pad must be soldered to a thermal plane for optimal power dissipation. This compact, thermally efficient package enables high-density placement in space-constrained applications such as wearable medical devices and portable test equipment.