Overview
The REF34-Q1 family, which includes the REF3450QDBVRQ1, is a series of low-drift, low-power, high-precision CMOS voltage references from Texas Instruments. These devices are designed to offer excellent initial voltage accuracy and minimal temperature drift, making them suitable for a wide range of applications, particularly in automotive and industrial systems. The REF34-Q1 devices feature a small footprint and are available in various packages, including 6-pin and 5-pin SOT-23 and 8-pin MSOP packages. They are AEC-Q100 qualified, ensuring reliability and performance over a broad temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage Options | 2.5V, 3.0V, 3.3V, 4.096V, 5.0V | V |
| Initial Accuracy | ±0.05% | % |
| Temperature Coefficient | 6 ppm/°C | ppm/°C |
| Operating Temperature Range | –40°C to +125°C | °C |
| Output Current | ±10 mA | mA |
| Quiescent Current | 95 µA (maximum) | µA |
| Shutdown Mode Current | 3 µA (maximum) | µA |
| Input Voltage | Up to 12 V | V |
| Output Noise (0.1 Hz to 10 Hz) | 3.8 µV PP/V | µV PP/V |
| Long-term Stability | 25 ppm/1000 hrs | ppm/1000 hrs |
| Package Options | 6-pin and 5-pin SOT-23, 8-pin MSOP |
Key Features
- High precision with ±0.05% initial accuracy and 6 ppm/°C temperature coefficient.
- Low power consumption with a quiescent current of less than 95 µA and a shutdown mode current of 3 µA.
- Very low output noise of 3.8 µV PP/V, ensuring high signal integrity in noise-critical systems.
- Excellent long-term stability with a drift of 25 ppm over 1000 hours.
- Wide input voltage range up to 12 V and output current capacity of ±10 mA.
- Enable pin for shutdown mode to reduce power consumption during standby.
- AEC-Q100 qualified for automotive applications with a temperature range of –40°C to +125°C.
Applications
- Battery management systems: The low power and high precision make these devices ideal for battery-powered applications.
- Advanced driver assistance systems (ADAS): Suitable for the stringent requirements of automotive systems.
- Noise-critical systems: The low output noise ensures high signal integrity in systems requiring minimal noise.
- High-resolution data converters: The precision and stability of the REF34-Q1 make it suitable for use with high-resolution data converters.
Q & A
- What is the initial accuracy of the REF34-Q1 voltage reference?
The initial accuracy of the REF34-Q1 is ±0.05%.
- What is the temperature coefficient of the REF34-Q1?
The temperature coefficient is 6 ppm/°C.
- What is the operating temperature range of the REF34-Q1?
The operating temperature range is –40°C to +125°C.
- What are the available output voltage options for the REF34-Q1?
The output voltage options are 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V.
- What is the quiescent current of the REF34-Q1 in active mode?
The quiescent current is less than 95 µA in active mode.
- How much current does the REF34-Q1 consume in shutdown mode?
The current consumption in shutdown mode is 3 µA.
- What is the maximum input voltage for the REF34-Q1?
The maximum input voltage is up to 12 V.
- What is the output noise of the REF34-Q1 in the 0.1 Hz to 10 Hz range?
The output noise is 3.8 µV PP/V in the 0.1 Hz to 10 Hz range.
- What is the long-term stability of the REF34-Q1?
The long-term stability is 25 ppm over 1000 hours.
- In what packages is the REF34-Q1 available?
The REF34-Q1 is available in 6-pin and 5-pin SOT-23 packages and an 8-pin MSOP package.
