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AD7291BCPZ

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

Manufacturer: Analog Devices, Inc
Mfr.Part #: AD7291BCPZ
Datasheet: AD7291BCPZ Datasheet (PDF)
Package/Case: LFCSP20
Product Type: Data Conversion ICs
RoHS:
Lifecycle: Active

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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

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

Application

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

Specifications

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