ISL23448WFVZ-T7A

Memory Type:	Volatile
Base Part Number:	ISL23448
Supplier Device Package:	20-TSSOP
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Operating Temperature:	-40°C ~ 125°C
Resistance - Wiper (Ohms) (Typ):	580
Temperature Coefficient (Typ):	125 ppm/°C
Tolerance:	±20%
Features:	Cascade Pin
Voltage - Supply:	1.2 V ~ 5.5 V, 1.7 V ~ 5.5 V
Series:	XDCP™
Interface:	SPI
Resistance (Ohms):	10k
Number of Taps:	128
Number of Circuits:	4
Configuration:	Potentiometer
Taper:	Linear
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction of ISL23448WFVZ-T7A

ISL23448WFVZ-T7A, developed by Intersil, is a versatile Digital Potentiometer designed for applications like data acquisition, voltage and current measurement, instrumentation, and control systems. Its general application field allows its use as an analog to digital converter, voltage-to-frequency converter, programmable light dimmer, DAC/ADC interface, motor speed control, and of course as a Digital Potentiometer. The ISL23448WFVZ-T7A model is a fully monolithic IC device that contains 4 channels of 8-bit digital potentiometers, with a wide range of useful features like I2C/SPI control and compensation, short circuit protection, power monitoring, and various voltage-supply options. It also offers programmable High Voltage Reference, increase integration with higher resolution, increased temperature stability and offers very low drift characteristics over a wide temperature range.

Working Principle of ISL23448WFVZ-T7A

The ISL23448WFVZ-T7A is an advanced Digital Potentiometer, offering both I2C/SPI interface for control, and voltage/current compensated control for operation. Its internal topology essentially consists of a voltage-to-digital control (VDC) signal and a current-to-digital control (CDC) signal, supplemented with a variable resistor (VR). The target variable value is then set to the desired values by applying a commanded voltage to the two control signals.The ISL23448WFVZ-T7A support up to 8 channels of 8-bit resolution, each of which can be connected separately for digital potentiometer applications. Internally, each of these channels contains a single potentiometer, whose wiper resistance is varied by a PWM signal generated from the I2C/SPI interface. Apart from its low drift characteristics and high stability, the ISL23448WFVZ-T7A comes with an internal digital-to-analog (D/A) converter, allowing accurate measurements even in environments with strong electrical noise or interference.The ISL23448WFVZ-T7A also offers integrated digital control of the voltage-to-frequency converter, offering enhanced functionality for control applications. Its temperature range is extended due to its improved temperature stability, allowing use in industrial and environmental conditions that require a wide operating temperature range.

Features of ISL23448WFVZ-T7A

The ISL23448WFVZ-T7A provides a wide range of features to enable an effective and reliable working performance in various application environments, making it an attractive choice for data acquisition and digital potentiometer systems. Some of its primary features include: • 8-bit resolution with ±0.1% accuracy while delivering rated settings• Supports four independent channels each with 10kΩ or 25kΩ equivalent ladder resistance• Wide temperature range of -40°C to +125°C for operation• Integrated voltage-to-frequency converter and digital control of the same• Compensated, I2C/SPI control for DC and low-frequency applications• System and power monitoring with thermal shutdown• Dual 5V, 3V, 2.5V, and 1.8V supply options• High Voltage Reference (VRH) program• Low drift characteristics over full temperature range

Applications of ISL23448WFVZ-T7A

The features and working principles of the ISL23448WFVZ-T7A makes it highly suitable for many data acquisition and digital potentiometer applications. These range from instrumentation and control systems to light dimmers, analog-to-digital converters, frequency-to-voltage converters, motor speed controllers, and more. The 8-bit resolution and wide temperature range of the ISL23448WFVZ-T7A allows it to be used in both climate-controlled and changing outside environments. The integrated digital control and voltage-to-frequency converter make it suitable for a wide range of industrial applications, providing reliable performance over a range of conditions. In addition, the temperature stability and low-drift characteristics of the device enable accurate measurements even in electrical noisy or interference environment. Overall, ISL23448WFVZ-T7A provides a powerful feature set, making it suitable for applications where accuracy and performance matter. Its versatile nature and broad operational environment makes it an attractive choice for many industrial systems and data acquisition processes.

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