AD7891ASZ-2

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AD7891ASZ-2

IC DAS 12BIT 500K 44MQFP

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規格

Package Tray
ProductStatus Active
Type Data Acquisition System (DAS)
NumberofChannels 8
Resolution(Bits) 12 b
SamplingRate(PerSecond) 500k
DataInterface Serial, Parallel
VoltageSupplySource Single Supply
Voltage-Supply 5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 44-QFP

概述

Description

The AD7891ASZ-2 is a 12-bit analog-to-digital converter (ADC) from Analog Devices, designed for high-speed data acquisition applications. It operates with a 2.5 V reference voltage and offers a sampling rate of up to 1 MSPS. The device features a serial interface compatible with SPI, allowing for easy integration with microcontrollers and digital signal processors.
Key specifications include low power consumption, typically around 12 mW during operation, and a wide input voltage range. It supports both single-ended and differential input configurations, enhancing its versatility in various applications, such as industrial automation, medical instrumentation, and consumer electronics.
The AD7891ASZ-2 also incorporates features like programmable gain amplification and an internal clock, simplifying system design. Its small package size (LFCSP) makes it suitable for compact designs.
Overall, the AD7891ASZ-2 is an efficient choice for applications requiring precise and rapid analog signal conversion.

Features

The AD7891ASZ-2 is a 12-bit analog-to-digital converter (ADC) designed for precision applications. Key features include:
1. Resolution: 12-bit resolution providing accurate digital representation of analog signals.
2. Sampling Rate: Up to 1.0 MSPS (mega samples per second) for high-speed data acquisition.
3. Input Range: Commonly operates with a voltage range of 0-5V, suitable for various applications.
4. Low Power Consumption: Designed for low power operation, making it ideal for battery-powered devices.
5. Serial Interface: Supports a 3-wire SPI-compatible interface for easy communication with microcontrollers.
6. Internal Reference Voltage: Includes an internal reference voltage for simplified circuit design.
7. Single Supply Operation: Operates from a single power supply, enhancing versatility in system design.
8. On-Chip Sample and Hold Circuit: Facilitates accurate signal sampling.
Overall, the AD7891ASZ-2 is well-suited for applications in industrial instrumentation, medical devices, and portable data acquisition systems.

Package

The AD7891ASZ-2 is housed in a 16-lead TSSOP (Thin Shrink Small Outline Package) package type, which is designed for surface mounting and offers a compact footprint for space-constrained applications.

Pinout

The AD7891ASZ-2 is a 12-bit analog-to-digital converter (ADC) with a total of 16 pins. The main functions of its pins include:
1. VDD: Power supply.
2. AGND: Analog ground.
3. DGND: Digital ground.
4. REF: Reference voltage input.
5. VIN+: Positive input for the analog signal.
6. VIN-: Negative input for the analog signal.
7. DB0 to DB11: Data output pins (12-bit data).
8. CS: Chip select, used to enable the device.
9. RD: Read control, used to initiate data read.
10. WR: Write control, used to configure the ADC.
11. SCLK: Serial clock input for synchronous operation.
12. BUSY: Indicates conversion status.
13. EXTREF: External reference selection (optional).
14. NC: No connect pins (not internally connected).
The AD7891ASZ-2 operates in a single-supply mode and is suitable for high-speed data acquisition applications.

Manufacturer

The AD7891ASZ-2 is manufactured by Analog Devices, Inc. (ADI). Analog Devices is a multinational company that specializes in the design and manufacturing of semiconductor products, particularly analog, mixed-signal, and digital signal processing (DSP) integrated circuits. Founded in 1965 and headquartered in Norwood, Massachusetts, ADI serves various industries including automotive, communications, industrial automation, healthcare, and consumer electronics. The company is renowned for its innovation in high-performance analog technology, providing solutions for data conversion, signal processing, and power management applications.

Application

The AD7891ASZ-2 is a high-speed, low-power 12-bit analog-to-digital converter (ADC) primarily used in applications such as portable instrumentation, industrial process control, sensor data acquisition, medical devices, and automotive systems. Its features make it suitable for applications requiring accurate and efficient signal conversion in environments like battery-operated devices and precision measurement systems.

Equivalent

The AD7891ASZ-2 is a 12-bit, dual-channel analog-to-digital converter (ADC) from Analog Devices. Equivalent products include the LTC1867 from Linear Technology, the MCP3202 from Microchip, and the ADS8318 from Texas Instruments. These alternatives also feature dual-channel input and similar performance specifications, but it's important to verify specific requirements and characteristics for compatibility.

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