Overview
The REF6225IDGKR from Texas Instruments is a high-precision voltage reference integrated with an ADC drive buffer. This component is part of the REF62xx family, known for its excellent temperature drift performance and extremely low noise characteristics. It is designed to provide a stable voltage reference with high accuracy and low noise, making it suitable for a variety of precision analog applications.
Key Specifications
| Parameter | Min | |||
|---|---|---|---|---|
| Output Voltage | - | - | 2.5 | V |
| Output Voltage Accuracy | -0.05% | - | 0.05% | % |
| Temperature Drift | - | - | 3 ppm/°C | ppm/°C |
| Supply Input Voltage | 3 | - | 5.5 | V |
| Supply Current (Active Mode) | 0.82 | 0.90 | 1.1 | mA |
| Shutdown Current | 1 | - | 3 | µA |
| Output Current Drive | -4 | - | 4 | mA |
| Total Integrated Noise (CL = 47 µF) | - | - | 5 µVRMS | µVRMS |
| Low Frequency Noise (0.1 Hz to 10 Hz) | - | - | 3 µVPP/V | µVPP/V |
| Output Impedance (DC to 200 kHz, CL = 47 µF) | - | - | 50 mΩ | mΩ |
Key Features
- Excellent Temperature Drift Performance: 3 ppm/°C (max) from 0°C to +70°C.
- Extremely Low Noise: Total noise of 5 µVRMS with a 47-µF capacitor and low frequency noise of 3 µVPP/V from 0.1 Hz to 10 Hz.
- Integrated ADC Drive Buffer: Low output impedance of less than 50 mΩ from DC to 200 kHz, enabling precise drive for ADCs like the ADS8881.
- Low Supply Current: Active mode current of 820 µA and shutdown current of 1 µA.
- High Initial Accuracy: Output voltage accuracy of ±0.05%.
- Programmable Short-Circuit Current: Adjustable short-circuit current for added protection.
- Low Dropout Voltage: Dropout voltage as low as 500 mV at 4 mA load current.
Applications
The REF6225IDGKR is suitable for various precision analog applications, including:
- High-Precision Data Acquisition Systems: Ideal for driving the reference pin of high-resolution ADCs like the ADS88xx family.
- Industrial Automation: Used in control systems and measurement instruments requiring stable and accurate voltage references.
- Medical Devices: Applies to medical equipment that demands high precision and low noise voltage references.
- Aerospace and Defense: Suitable for applications requiring high reliability and precision voltage references.
Q & A
- What is the output voltage of the REF6225IDGKR?
The output voltage of the REF6225IDGKR is 2.5 V.
- What is the temperature drift of the REF6225IDGKR?
The temperature drift is 3 ppm/°C from 0°C to +70°C.
- What is the total integrated noise of the REF6225IDGKR with a 47-µF capacitor?
The total integrated noise is 5 µVRMS.
- What is the output impedance of the REF6225IDGKR?
The output impedance is less than 50 mΩ from DC to 200 kHz with a 47-µF capacitor.
- What is the supply current in active mode for the REF6225IDGKR?
The supply current in active mode is 820 µA.
- What is the shutdown current of the REF6225IDGKR?
The shutdown current is 1 µA.
- Can the REF6225IDGKR drive high-resolution ADCs?
Yes, it is designed to drive the reference pin of high-resolution ADCs like the ADS88xx family.
- What is the dropout voltage of the REF6225IDGKR at 4 mA load current?
The dropout voltage is as low as 500 mV at 4 mA load current.
- Is the REF6225IDGKR suitable for medical devices?
Yes, it is suitable for medical devices due to its high precision and low noise characteristics.
- What is the package type of the REF6225IDGKR?
The package type is an 8-pin VSSOP.
