ADS8325IBDRBT

Number of A/D Converters:	1
Base Part Number:	ADS8325
Supplier Device Package:	8-SON (3x3)
Package / Case:	8-VDFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C
Features:	--
Voltage - Supply, Digital:	2.7 V ~ 3.6 V, 5V
Voltage - Supply, Analog:	2.7 V ~ 3.6 V, 5V
Reference Type:	External
Architecture:	SAR
Series:	microPOWER™
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	SPI
Input Type:	Pseudo-Differential, Single Ended
Number of Inputs:	1
Sampling Rate (Per Second):	100k
Number of Bits:	16
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Analog-to-Digtal Converters (ADC) is an important component of a data acquisition system. A successful data acquisition system can accurately encode and measure physical parameters into digital signals. It can also see when those signals vary outside its specified tolerances. One example of a ADC component is the Analog Devices ADS8325IBDRBT. It is an 8-bit device that can convert data in two different operating modes.

Operating Modes

The ADS8325IBDRBT can operate in two modes: Voltage Mode (VM) and Time Mode (TM). In Voltage Mode, an analog signal between V SS (ground) and V DD (supply voltage) is applied to the A/D input port. This signal is then converted to an 8-bit code. When using time mode, both the analog signal and a reference signal are applied to the A/D. The reference signal is used as a time base and can be synchronous or asynchronous to the signal of interest. The signal of interest is then converted to an 8-bit code in a fixed time interval. In other words, the rate of conversion is determined by the reference signal and time base.

Working Principle

The working principle of the ADS8325IBDRBT is based on a method called dual-slope integration. In this method, a signal is passed through an integrator, which multiplies the signal by a responding factor. The resulting output is then processed by an ADC converter, which converts the analog signal into a digital value. The device then operates in one of two modes: in continuous mode, the device works on a continuous basis, and in single-shot mode, the device converts one input each time and then waits for another signal to be entered.

Features and Performance

The ADS8325IBDRBT has a wide operating voltage of 2.7V to 5.5V and provides an 8-bit resolution. The device can operate over a wide temperature range of -40°C to +85°C. The device also has an adjustable sample rate of up to 500K samples per second, depending on different operational modes used. The device has a low power consumption of 45mW, making it suitable for battery-operated applications. This device utilizes a proprietary noise-shaping architecture, which reduces the generation of digital artifacts for improved data integrity. The device also has an on-chip voltage reference and adjustable track-and-hold capability. Additionally, it features an I 2 C serial port that allows the device to be interfaced with other electronic systems.

Applications

The ADS8325IBDRBT is an ideal solution for low-cost data acquisition systems. It is used in a variety of applications. These include monitoring control systems, flow sensing, temperature control, video signal acquisition, radar and sonar systems, and medical equipment. The device is also suitable for battery-powered applications, due to its low power consumption.

Conclusion

The Analog Devices ADS8325IBDRBT is an 8-bit Analog-to-Digital converter. It operates in two modes, Voltage Mode and Time Mode, and utilizes a dual-slope integration method. It has a wide operating voltage range from 2.7V to 5.5V and an adjustable sample rate of up to 500K samples per second. The device also has a low power consumption and features an I 2 C serial port. The device is suitable for a variety of applications, including monitoring control systems, flow sensing, temperature control, video signal acquisition, and medical equipment.

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