REF3030AIDBZR

REF3030AIDBZR

Part Number: REF3030AIDBZR

Manufacturer: Texas Instruments

Description: IC VREF SERIES 0.2% SOT23-3

Shipped from: Shenzhen/HK Warehouse

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REF3030AIDBZR Description

The tiny REF30xx reference family comes in a tiny SOT-23 packaging with three pins, and it features precision, low power consumption, and minimal voltage dropout. The REF30xx provides outstanding temperature drift and initial accuracy despite only requiring 42 A of operational current when it is in its quiescent state (typical). Because of its low power consumption and reasonably high precision, the REF30xx is an excellent choice for loop-powered industrial applications like pressure and temperature transmitter applications. These kinds of applications are expected.

Because it does not need a load capacitor to be stable, the REF30xx is incredibly convenient for applications classified as inherently safe and explosion-proof. The increased temperature range of –40 degrees Celsius to +125 degrees Celsius is specified for use with the REF30xx. The REF30xx can function with supplies within 1 mV of the output voltage when no load is present. Applications that are portable and run on batteries can benefit from REF30xx’s low dropout, small size, and low power consumption. Engineers can leverage these features.

REF3030AIDBZR Features

  • microSize Package: SOT-23-3
  • Low Dropout: 1 mV
  • High Output Current: 25 mA
  • High Accuracy: 0.2%
  • Low IQ: 42 µA (Typical)

Applications

  • Temperature and Pressure Transmitters
  • Portable, Battery-Powered Equipment
  • Data Acquisition Systems
  • Medical Equipment
  • Handheld Test Equipment

Feature Description

Supply Voltage

The dropout voltage is relatively low in the REF30xx family of references. The REF30xx can be used with a supply of only 1 mV over the output voltage in an unloaded state, but the REF3012 has a minimum supply need of 1.8 V. The front page displays a typical dropout voltage vs. load during loaded situations. The quiescent current of the REF30xx is low and highly stable despite temperature and power variations.

The usual quiescent current is 42 A at room temperature, with a maximum of 59 A regardless of temperature. There is often less than a 2.5 A variation in quiescent current across the entire supply range. If the supply voltage falls below the specified levels, the REF30xx may experience transient current draws larger than the average quiescent current. To easily avoid this problem, use a power supply with a fast-rising edge and low output impedance.

Device Functional Modes

● Negative Reference Voltage

To accommodate applications that need both a negative and positive reference voltage, the OPA703 and REF30xx can be utilized to generate a dual-supply reference from a source of negative 5 volts.

● Thermal Hysteresis

The change in output voltage after running the device at 25°C, cycling the device over the prescribed temperature range, then returning the device to 25°C is what is meant by the term “thermal hysteresis” when referring to the REF30xx.

● Temperature Drift

The REF30xx has a relatively low amount of drift error, which is the change in output voltage due to temperature changes. The significant temperature range of use for many applications is between 0 and 70 degrees Celsius. The REF30xx includes a typical drift coefficient of 20 parts per million (ppm) when measured using the box technique of drift measurement. The REF30xx family drift grows to a specific value of 50 ppm for temperature ranges typical in industrial settings, which are –40 degrees Celsius to +125 degrees Celsius.

● Noise Performance

The output voltage of the REF30xx and the operating temperature contribute to an increase in the noise voltage. Additional filtering may be used to reduce the amount of noise produced by the output; however, care must be taken to ensure that this does not negatively impact AC performance.

● Long-Term Stability

Long-term stability describes how little a reference’s output voltage varies over a time measured in weeks, months, or even years. As seen from the long-term stability curves, the magnitude of this effect decreases as more time passes. From zero hours to one thousand hours, the REF30xx has a drift value of 24 ppm; however, from one thousand hours to two thousand hours, that value drops to 15 ppm. The value of this characteristic can be determined by taking readings from 30 different units at predetermined intervals for 2000 hours.

● Load Regulation

The shift in output voltage that occurs as a direct consequence of alterations in load current is what we mean when we talk about load control. Using force and sense contacts accomplishes the measurement of load regulation for the REF30xx. Because the force and sense lines are coupled to the contact area of the output pin, they mitigate the impact of contact and trace resistance, leading to an accurate measurement of the load regulation entirely contributed by the REF30xx. Make advantage of force and sense lines in situations and applications that require greater load regulation.

Application Information

The REF30xx does not need a capacitor attached to the output to function normally. You need to exercise extra caution when employing capacitors with a low equivalent series resistance (ESR) and a high capacitance because a capacitive load may be connected. This safety measure is essential for devices with a low output voltage; hence, for the REF3012, you should select a capacitor with an ESR of 10 F or less.

Design Requirements

  • Supply Voltage: 3.3 V
  • Maximum Input Voltage: ±6 V
  • Specified Input Voltage: ±5 V
  • ADC Reference Voltage: 1.25 V

The purpose of this design is to properly condition a 5-V bipolar input voltage so that a low-voltage ADC may convert it with a VREF of 1.25 V and an input voltage range of VREF 2. A broader input range of at least 6 V is required for the circuit to function, albeit at reduced performance, and this will allow for more accessible protection of overvoltage scenarios.

Conclusion

This Texas Instruments REF3030AIDBZR voltage reference power management device can generate and maintain an accurate DC voltage regardless of fluctuations in the power source. It has a maximum operating voltage of 7 V, allowing for simple power regulation in your circuit. The output voltage of 3 V exemplifies expert power management.

At first, it’s just about 0.2% precise. This voltage reference circuit supports a series topology. With a line regulation of 375 uV/V and a load regulation of 100 uV/mA, you can get a constant current out of your circuit. Assembling the product is simplified by sending it on tape and reel. This voltage reference circuit can function in the temperature range from -40 degrees Celsius to 125 degrees Celsius. The highest temperature coefficient it can handle is 75ppm/°C.

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