Overview
The REF2033AIDDCT from Texas Instruments is a low-drift, low-power, dual-output voltage reference IC. This device is designed to provide a stable 3.3-V reference voltage (VREF) and a half-voltage reference (VREF/2), making it ideal for single-supply systems. It is particularly useful in applications requiring precise voltage references, such as analog-to-digital converters (ADCs) and other high-precision industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage (VREF) | 3.3 | V |
| Half-Reference Voltage (VREF/2) | 1.65 | V |
| Initial Accuracy | ±0.05% | |
| Temperature Drift | 8 ppm/°C (max) from –40°C to 125°C | |
| VREF and VBIAS Tracking | 6 ppm/°C (max) from –40°C to 85°C, 7 ppm/°C (max) from –40°C to 125°C | |
| Package Type | SOT23-5 | |
| Dropout Voltage | 10 mV | |
| Output Current | ±20 mA | |
| Quiescent Current | 360 µA | |
| Line Regulation | 3 ppm/V | |
| Load Regulation | 8 ppm/mA |
Key Features
- Dual-output voltage reference: VREF and VREF/2 for 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.
- Matte-Sn version available for improved corrosion resistance.
Applications
The REF2033AIDDCT is suitable for various high-precision applications, including:
- Analog-to-digital converters (ADCs) requiring stable reference voltages.
- Biasing input bipolar signals in single-supply systems.
- Battery-operated systems due to its low dropout voltage and low quiescent current.
- Industrial applications requiring precise voltage references.
- Motor control drives and other precision current source and sink applications.
Q & A
- What is the primary function of the REF2033AIDDCT?
The REF2033AIDDCT is a dual-output voltage reference IC providing stable 3.3-V and 1.65-V reference voltages.
- What is the temperature drift performance of the REF2033AIDDCT?
The temperature drift is 8 ppm/°C (maximum) from –40°C to 125°C.
- What is the initial accuracy of the REF2033AIDDCT?
The initial accuracy is ±0.05% (maximum).
- What is the package type of the REF2033AIDDCT?
The package type is SOT23-5.
- What is the dropout voltage of the REF2033AIDDCT?
The dropout voltage is 10 mV.
- What is the maximum output current of the REF2033AIDDCT?
The maximum output current is ±20 mA.
- What is the quiescent current of the REF2033AIDDCT?
The quiescent current is 360 µA.
- Is the REF2033AIDDCT suitable for battery-operated systems?
Yes, it is suitable due to its low dropout voltage and low quiescent current.
- What are some common applications of the REF2033AIDDCT?
Common applications include ADCs, biasing bipolar signals, battery-operated systems, and high-precision industrial applications.
- Is there a version of the REF2033AIDDCT with improved corrosion resistance?
Yes, a Matte-Sn version is available for improved corrosion resistance.
