Overview
The REF2033AIDDCR is a low-drift, low-power, dual-output voltage reference produced by Texas Instruments. This component is designed to provide stable reference voltages, making it ideal for applications requiring high precision and reliability. The REF2033AIDDCR offers two outputs: a 3.3V reference voltage (VREF) and a 1.65V bias voltage (VBIAS or VREF/2), which are particularly useful in single-supply systems. The device operates within a wide temperature range of –40°C to 125°C and is packaged in a compact SOT-23-THN (DDC) package with 5 pins.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (VREF) | 3.3 | V |
| Bias Voltage (VBIAS or VREF/2) | 1.65 | V |
| Temperature Drift | ±8 ppm/°C (maximum) | –40°C to 125°C |
| Initial Accuracy | ±0.05% (maximum) | |
| VREF and VBIAS Tracking Over Temperature | ±6 ppm/°C (maximum) from –40°C to 85°C, ±7 ppm/°C (maximum) from –40°C to 125°C | |
| Package Type | SOT-23-THN (DDC) | |
| Pins | 5 | |
| Operating Temperature Range | –40°C to 125°C | °C |
| Dropout Voltage | 10 mV | mV |
| Output Current | ±20 mA | mA |
| Quiescent Current | 360 µA | µA |
| Line Regulation | 3 ppm/V | ppm/V |
| Load Regulation | 8 ppm/mA | ppm/mA |
Key Features
- Two outputs: VREF (3.3V) and VBIAS (1.65V) for convenient use in single-supply systems.
- Excellent temperature drift performance: ±8 ppm/°C (maximum) from –40°C to 125°C.
- High initial accuracy: ±0.05% (maximum).
- VREF and VBIAS tracking over temperature: ±6 ppm/°C (maximum) from –40°C to 85°C, ±7 ppm/°C (maximum) from –40°C to 125°C.
- Microsize package: SOT23-5.
- Low dropout voltage: 10 mV.
- High output current: ±20 mA.
- Low quiescent current: 360 µA.
- Good line and load regulation: 3 ppm/V and 8 ppm/mA respectively.
- Long-term stability and low noise levels, making it suitable for high-precision industrial applications.
Applications
- Electricity meters.
- Analog input and output modules.
- Servo drive control modules.
- Circuit breakers (ACB, MCCB, VCB).
- Clinical digital thermometers.
- Lab and field instrumentation.
- Battery test systems.
- Battery-operated systems due to its low dropout voltage.
The REF2033AIDDCR is particularly useful in applications requiring stable reference voltages in the middle of the analog-to-digital converter (ADC) input range to bias input bipolar signals.
Q & A
- What is the reference voltage provided by the REF2033AIDDCR?
The REF2033AIDDCR provides a 3.3V reference voltage (VREF) and a 1.65V bias voltage (VBIAS or VREF/2).
- What is the temperature drift performance of the REF2033AIDDCR?
The temperature drift performance is ±8 ppm/°C (maximum) from –40°C to 125°C.
- What is the initial accuracy of the REF2033AIDDCR?
The initial accuracy is ±0.05% (maximum).
- What is the package type of the REF2033AIDDCR?
The package type is SOT-23-THN (DDC) with 5 pins.
- What is the operating temperature range of the REF2033AIDDCR?
The operating temperature range is –40°C to 125°C.
- What is the dropout voltage of the REF2033AIDDCR?
The dropout voltage is 10 mV.
- What is the maximum output current of the REF2033AIDDCR?
The maximum output current is ±20 mA.
- What is the quiescent current of the REF2033AIDDCR?
The quiescent current is 360 µA.
- What are some typical applications of the REF2033AIDDCR?
Typical applications include electricity meters, analog input and output modules, servo drive control modules, circuit breakers, clinical digital thermometers, lab and field instrumentation, and battery test systems.
- Why is the REF2033AIDDCR suitable for battery-operated systems?
The REF2033AIDDCR is suitable for battery-operated systems due to its extremely low dropout voltage of only 10 mV, allowing operation from very low input voltages.
