MAX6138CEXR25+T

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	MAX6138
Supplier Device Package:	SC-70-3
Package / Case:	SC-70, SOT-323
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Current - Cathode:	65µA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	35µVrms
Series:	--
Temperature Coefficient:	25ppm/°C
Tolerance:	±0.5%
Current - Output:	15mA
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Fixed
Reference Type:	Shunt
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
MAX6138CEXR25+T is a fixed frequency, resistor-programmable and high accuracy voltage reference. MAX6138CEXR25+T is a member of the MAX6138 family of precision CMOS voltage references and it is the smallest member of the family. It provides a wide range of operating temperature range and low power consumption. It is designed to operate from 2.25 V to 6.0 V and is suitable for variety of applications. Application Field
MAX6138CEXR25+T is suitable for a variety of applications including, but not limited to, A/D converters, battery management, microcontrollers, power management, motor control and medical instrumentation. The device provides an accurate and low-power voltage reference. In A/D converters, it is used to generate a reference voltage while in microcontrollers, it is used to maintain accurate voltage supply to the system. In battery management, it is used to accurately track the cell voltages in order to maximize battery life and in motor control, it is used to monitor the motor\'s operational current. In medical instruments, it is used to drive accurate measurement and control of the instruments. This prevents instability and provides accurate measurement of the device\'s parameters.Working Principle
The MAX6138CEXR25+T works on the principle of resistor value programming. This means that the value of the resistor is programmed to output a certain voltage level. This voltage level is maintained regardless of the load given to the device. In order to program the desired output voltage, an external resistor must be connected between the "Reference Setup" and the "INF Input" pins. The resistance value of the resistor must be chosen such that the output voltage is close to the desired voltage. A simplified version of the block diagram of the MAX6138CEXR25+T is shown in figure 1.The voltage at the "Reference Setup" pin is proportional to the voltage at the "INF Input" pin. The resistors R1, R2 and R3 are connected in series and the "INF Input" pin is connected to the common point between R2 and R3. Thus, due to the relationship of the voltage at each of the resistors and the voltage drop across each resistor, the voltage at the "Reference Setup" pin is proportional to the voltage at the "INF Input" pin. By adjusting the resistance value of R2, the voltage at the "Reference Setup" pin can be adjusted and thus, the output voltage will be proportional to the voltage at the "INF Input" pin.The MAX6138CEXR25+T uses advanced on-chip biasing and pulses width modulated (PWM) current sources for low noise and power. The PWM current sources are used for the OUT pin for low power and low noise. The unique architecture of the MAX6138CEXR25+T allows it to offer high accuracy, low power and low noise operation.Conclusion
The MAX6138CEXR25+T voltage reference is designed to provide accurate and low-power voltage reference in a wide range of applications. It uses advanced on-chip biasing and PWM current sources for low noise and power, allowing it to offer high accuracy, low power and low noise operation. With its wide operating temperature range and low power consumption, the MAX6138CEXR25+T is an ideal device for high precision and low-power operations.

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