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8-Channel Single ADC SAR 22.22ksps 12-bit Serial 20-Pin LFCSP EP Tray

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AD7291BCPZ General Description

The AD7291BCPZ is a 12-bit, low-power, multichannel, successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices, Inc. This ADC is designed for precision data conversion in various electronic systems.

The part operates from a single 3.3 V power supply and features an I2C-compatible interface. The part contains a 9-channel multiplexer and a track-and-hold amplifier than can handle frequencies up to 30 MHz. The device has an on-chip 2.5 V reference that can be disabled to allow the use of an external reference.

The AD7291 provides a 2-wire serial interface compatible with I2C interfaces. The I2C interface supports standard and fast I2C interface modes. The AD7291 normally remains in a partial power-down state while not converting and powers up for conversions. The conversion process can be controlled by a command mode where conversions occur across I2C write operations or an autocycle mode selected through software control.

The AD7291 includes a high accuracy band gap temperature sensor, which is monitored and digitized by the 12-bit ADC to give a resolution of 0.25°C.

The AD7291 offers a programmable sequencer, which enables the selection of a preprogrammable sequence of channels for conversion.

On-chip limit registers can be programmed with high and low limits for the conversion results; an out-of-range indicator output (ALERT) becomes active when the programmed high or low limits are violated by the conversion result. This output can be used as an interrupt.

Product Highlights

  • Ideally suited to monitoring system variables in a variety of systems including telecommunications, process control, and industrial control.
  • I2C-compatible serial interface. Standard and fast modes.
  • Automatic partial power-down while not converting to maximize power efficiency.
  • Channel sequencer operation.
  • Integrated temperature sensor with 0.25°C resolution.
  • Out of range indicator that can be software disabled or enabled.

AD7291BCPZ Pin Configuration

AD7291BCPZ Pin Configuration


Key Features

  • Temperature sensor accuracy of ±1°C typical
  • Channel sequencer operation
  • I²C-compatible serial interface supports standard and fast speed modes
  • Out of range indicator/alert function
  • Power-down current - 12µA maximum


  • Industrial Measurement and Control: In industrial control systems and instrumentation for precise measurement of analog signals.
  • Data Acquisition Systems: In data acquisition systems, test and measurement equipment, and data loggers for converting real-world data into digital form.
  • Automotive Electronics: For automotive control and monitoring applications, such as engine control units (ECUs) and sensor interfacing.
  • Medical Devices: In medical instruments and devices that require high-precision data conversion, such as patient monitors and diagnostic equipment.
  • Communication Equipment: In telecom infrastructure, network equipment, and communication devices for analog signal processing.
  • Consumer Electronics: Utilized in high-end audio equipment, portable media players, and other consumer gadgets for high-quality audio signal conversion.
  • Energy Management: In energy management systems and smart meters for monitoring and controlling energy consumption.
  • Avionics: In avionics and aerospace applications, including navigation and control systems.
  • Scientific Research: Employed in scientific experiments and research equipment for accurate data collection.

AD7291BCPZ Functional Block Diagram

AD7291BCPZ Functional Block Diagram


Category Integrated Circuits (ICs)Data AcquisitionAnalog to Digital Converters (ADC) Mfr Analog Devices Inc.
Series - Package Tray
Product Status Active Number of Bits 12
Sampling Rate (Per Second) 22.22k Number of Inputs 8
Input Type Single Ended Data Interface I²C
Configuration MUX-S/H-ADC Ratio - S/H:ADC 1:1
Number of A/D Converters 1 Architecture SAR
Reference Type External, Internal Voltage - Supply, Analog 2.8V ~ 3.6V
Voltage - Supply, Digital 2.8V ~ 3.6V Features Selectable Address, Temperature Sensor
Operating Temperature -40°C ~ 125°C Package / Case 20-WFQFN Exposed Pad, CSP
Supplier Device Package 20-LFCSP (4x4) Mounting Type Surface Mount
Base Product Number AD7291

AD7291BCPZ Equivalent Parts

You may consider these replacement and alternative parts:

Part Number




Part Number:  AD7298-1BCPZ

In-Stock:  4834

Package:  LFCSP20

Description:   8-Channel Single ADC SAR 1Msps 10-bit Serial 20-Pin LFCSP EP Tray

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Ratings and Reviews

S**l 03/03/2023

The parcel is received. I haven't checked yet. Thanks to the seller.

E**y 04/05/2022

Very good product seller recommend.

J**r 07/22/2021

Trustworthy, A+ Company!

E**a 12/09/2020

If you catch a bunny from this keychain-night lamp, then as the bear in the eye came.Somewhere between dho and a full-fledged neighbor.



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