Overview
The REF2033QDDCRQ1 from Texas Instruments is a low-drift, low-power, dual-output voltage reference IC designed for high-precision applications. This device is part of the REF20xx-Q1 series and is AEC-Q100 qualified, ensuring reliability and performance in automotive and other demanding environments. It features two outputs, VREF and VREF/2, which are particularly useful in single-supply systems, especially for biasing input bipolar signals in analog-to-digital converters (ADCs). The device operates over a wide temperature range of –40°C to +125°C and offers excellent temperature drift and initial accuracy.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage Accuracy | -0.05% | 0.05% | % | |
| Temperature Drift | 8 ppm/°C | ppm/°C | ||
| VREF and VBIAS Tracking Over Temperature | 7 ppm/°C | ppm/°C | ||
| Input Voltage Range | VREF + 0.02 V | 5.5 V | V | |
| Output Current | ±20 mA | mA | ||
| Quiescent Current | 360 µA | 430 µA | µA | |
| Line Regulation | 3 ppm/V | ppm/V | ||
| Load Regulation | 8 ppm/mA | ppm/mA | ||
| Dropout Voltage | 10 mV | mV | ||
| Package | SOT23-5 | |||
| Operating Temperature Range | –40°C | +125°C | °C |
Key Features
- AEC-Q100 qualified with a temperature grade 1 rating for operation from –40°C to +125°C.
- Functional Safety-Capable with documentation to aid in functional safety system design.
- Two outputs: VREF and VREF/2, suitable for single-supply systems and biasing bipolar signals in ADCs.
- Excellent temperature drift performance of 8 ppm/°C (maximum) and high initial accuracy of ±0.05% (maximum).
- VREF and VBIAS outputs track each other with a precision of 7 ppm/°C (maximum) across the temperature range.
- Microsize SOT23-5 package.
- Low dropout voltage of 10 mV, enabling operation from very low input voltages.
- High output current capability of ±20 mA and low quiescent current of 360 µA.
- Good line and load regulation: 3 ppm/V and 8 ppm/mA, respectively.
- Very good long-term stability and low noise levels, making it ideal for high-precision applications.
Applications
- Telematics control systems.
- Battery management systems.
- Inverter and motor control systems.
- Automotive gateway systems.
- Power distribution boxes.
- Power steering systems.
- On-board chargers.
The REF2033QDDCRQ1 is particularly useful in applications requiring stable voltage references, especially in single-supply systems where biasing bipolar signals is necessary.
Q & A
- What is the operating temperature range of the REF2033QDDCRQ1?
The REF2033QDDCRQ1 operates from –40°C to +125°C.
- What are the key outputs provided by the REF2033QDDCRQ1?
The device provides two outputs: VREF and VREF/2.
- What is the maximum temperature drift of the REF2033QDDCRQ1?
The maximum temperature drift is 8 ppm/°C.
- What is the initial accuracy of the REF2033QDDCRQ1?
The initial accuracy is ±0.05% (maximum).
- What is the quiescent current of the REF2033QDDCRQ1?
The quiescent current is 360 µA (typical) and 430 µA (maximum).
- What is the dropout voltage of the REF2033QDDCRQ1?
The dropout voltage is 10 mV.
- What are the line and load regulation specifications of the REF2033QDDCRQ1?
The line regulation is 3 ppm/V, and the load regulation is 8 ppm/mA.
- Is the REF2033QDDCRQ1 suitable for high-precision applications?
Yes, it is suitable due to its excellent temperature drift, high initial accuracy, and low noise levels.
- What package type is the REF2033QDDCRQ1 available in?
The device is available in a microsize SOT23-5 package.
- Is the REF2033QDDCRQ1 AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified with a temperature grade 1 rating.
