REF198ES-REEL

Series:	REF19
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Reference Type:	Series
Output Type:	Fixed
Voltage - Output (Min/Fixed):	4.096V
Current - Output:	30mA
Tolerance:	±0.05%
Temperature Coefficient:	5ppm/°C
Noise - 0.1Hz to 10Hz:	40µVp-p
Noise - 10Hz to 10kHz:	--
Voltage - Input:	4.5 V ~ 15 V
Current - Supply:	45µA
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	8-SOIC
Base Part Number:	REF198

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Introduction

A REEL (Resistor-Indexed Electronic Element) is an integrated passive component (IPC) used to provide reference voltages for power management and voltage sensitivity applications. REELs are produced by several manufacturers and their reference voltage range from 3.0V to 5.4V. They feature a wide operating temperature range, low power dissipation, low noise levels, and high precision voltage accuracy in order to meet the demands of a variety of digital and analog circuits.

Application Fields

REELs can be broadly classified into two distinct categories; low voltage and high voltage. Low voltage devices are typically used in power management systems, providing a stabilized and controlled reference voltage that helps to maintain the desired system voltage levels and prevent overvoltage conditions. Low voltage REELs are often found in consumer electronic appliances such as cell phones, laptops, and tablet computers.High voltage REELs are typically used in electronic circuits that require a high level of precision voltage accuracy, such as automotive and aerospace systems. These types of REELs feature a wide operating temperature range, as well as a high degree of isolation between the reference voltage and the other circuits in the system. High voltage REELs are also commonly used in precision industrial applications and medical instruments.

Working Principles

At the core of the REEL design is a resistor string, which is usually comprised of dozens of discrete resistors, connected in series and typically featuring a high-precision, 10-bit value. This resistor string is connected to a voltage sensing circuit, which senses and measures the voltage across the resistor string. The voltage measuring circuit is then connected to an analog-to-digital converter, which converts the measured voltage into a represented digital value that is used by the system to set the reference voltage level.The reference voltage is then output to the system and used for a variety of purposes, such as providing a stable and adjustable DC bias voltage for powering low voltage logic circuits, voltage regulation, providing a low-cost reference voltage for precision feedback systems, and voltage level shifting.

Conclusion

REEL (Resistor-Indexed Electronic Element) is an integrated passive component used to provide reference voltages for power management and voltage sensitivity applications, and they are popularly used within a variety of systems, ranging from consumer electronics to automotive and aerospace systems. The core of the REEl design is a resistor string, which is connected to a voltage sensing circuit which measures the voltage across the resistor string, which is then sent to an analog-to-digital converter, which converts the measured voltage into a represented digital value. This represented digital value is output to the system, and is used to set the reference voltage level, which is then used for a variety of purposes.

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