ZR285R01

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The ZR285R01 is a member of the Texas Instruments family of Very Low Dropout Voltage Reference products that include the single-channel LM285 family and the dual-channel LM385 family of references. The ZR285R01 is designed to provide precise, low-noise reference voltages for applications requiring low input dropout voltage and very high accuracy. The device features an improved architecture with increased stability and a temperature coefficient of ±15ppm/°C.

Features of ZR285R01

• Very low dropout voltage of only 10mV
• High output accuracy of ±15ppm/°C over the −40°C to +85°C temperature range
• Temperature grade of 0.25V, typical accuracy of 0.056%
• Wide operating supply range of 3V to 20V
• Wide input range from 2V to 20V
• High DC precision of 0.01% and temperature accuracy of 0.005%
• Low noise floor of 20μV

Applications

The ZR285R01 is well suited for a wide variety of applications, such as controlled-current and voltage sources, temperature measurement, and active feedback loops. Typical applications of the ZR285R01 include instrumentation, datacom, telecom, industrial, and medical systems. The device is well suited for use in systems where long battery life, precise voltage references, or low-dropout voltage is required.

Working Principle

The ZR285R01’s internal architecture is based on a precision voltage reference IC and a high-performance power MOSFET in a low-dropout configuration. The IC’s reference voltage is provided via an external resistor divider, and the power MOSFET amplifies the voltage reference signal to generate the output voltage. By controlling the drain voltage of the power MOSFET, the output voltage can be adjusted. The device also features a special error amplifier with a wide input range that can be used to adjust the output voltage even further. The error amplifier is designed to ensure a precise output voltage over temperature.

The ZR285R01 is optimized for applications with low input dropout voltage, high accuracy, wide operating supply voltage and low output noise, making it an ideal choice for precision voltage reference applications. With its wide range of features, the ZR285R01 is an excellent choice for a variety of applications requiring high accuracy and low dropout voltage.

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