Overview
The ADR425BRZ-REEL7 is a high-precision voltage reference IC from Analog Devices Inc., part of the ADR42x series. This device is known for its ultraprecision, low noise, and excellent long-term stability, making it ideal for various precision applications. The ADR425BRZ-REEL7 features Analog Devices' patented XFET (eXtra implanted junction FET) technology, which minimizes nonlinearity of the voltage change with temperature and offers superior accuracy and thermal hysteresis compared to traditional band gap references. It operates over an extended industrial temperature range of −40°C to +125°C and is available in an 8-lead SOIC package.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Output Voltage | VOUT | A Grade | 4.994 | 5.000 | 5.006 | V |
| B Grade | 4.998 | 5.000 | 5.002 | V | ||
| Initial Accuracy | VOUTERR | A Grade | −6 | +6 | mV | |
| B Grade | −1.5 | +1.5 | mV | |||
| Temperature Coefficient | TCVOUT | A Grade | 2 | 10 | ppm/°C | |
| B Grade | 1 | 3 | ppm/°C | |||
| Supply Voltage Headroom | VIN − VOUT | 2 | V | |||
| Line Regulation | ∆VOUT/∆VIN | VIN = 5 V to 18 V | 10 | 35 | ppm/V | |
| Load Regulation | ∆VOUT/∆IL | IL = 0 mA to 10 mA | 70 | ppm/mA | ||
| Quiescent Current | IIN | No load | 390 | 500 | 600 | µA |
| Voltage Noise (p-p) | eN | 0.1 Hz to 10 Hz | 2 | µV p-p | ||
| Voltage Noise Density | eN | 1 kHz | 90 | nV/√Hz | ||
| Turn-On Settling Time | tR | 10 | µs | |||
| Long-Term Stability | ∆VOUT | 1000 hours | 50 | ppm | ||
| Output Voltage Hysteresis | VOUT_HYS | 40 | ppm | |||
| Ripple Rejection Ratio | RRR | fIN = 1 kHz | −75 | dB | ||
| Short Circuit to GND | ISC | 27 | mA |
Key Features
- Ultraprecision Voltage Reference: The ADR425BRZ-REEL7 offers high accuracy with initial accuracy as low as ±1.5 mV for the B grade and ±6 mV for the A grade.
- Low Noise: Features low voltage noise of 2 µV p-p from 0.1 Hz to 10 Hz and a voltage noise density of 90 nV/√Hz at 1 kHz.
- XFET Technology: Utilizes Analog Devices' patented XFET technology, which provides superior accuracy and thermal hysteresis compared to traditional band gap references.
- Temperature Stability: Offers a temperature coefficient as low as 1 ppm/°C for the B grade and 2 ppm/°C for the A grade over the extended industrial temperature range of −40°C to +125°C.
- Adjustable Output Voltage: The trim terminal can be used to adjust the output voltage over a ±0.5% range without compromising other performance parameters.
- Compact Packaging: Available in 8-lead SOIC and MSOP packages, with the MSOP being 30% smaller than the SOIC.
Applications
The ADR425BRZ-REEL7 is suitable for a variety of precision applications, including:
- Precision Conversion: Ideal for applications such as analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) where high accuracy and low noise are critical.
- Optical Networks: Used in optical network equipment where stable and accurate voltage references are essential.
- Medical Equipment: Suitable for medical devices that require high precision and reliability.
- Industrial Automation: Can be used in industrial automation systems that demand accurate and stable voltage references.
Q & A
- What is the output voltage of the ADR425BRZ-REEL7?
The output voltage of the ADR425BRZ-REEL7 is 5.000 V, with initial accuracy ranging from ±1.5 mV for the B grade to ±6 mV for the A grade. - What is the temperature range for the ADR425BRZ-REEL7?
The device operates over an extended industrial temperature range of −40°C to +125°C. - What is the noise performance of the ADR425BRZ-REEL7?
The device features low voltage noise of 2 µV p-p from 0.1 Hz to 10 Hz and a voltage noise density of 90 nV/√Hz at 1 kHz. - What technology does the ADR425BRZ-REEL7 use?
The ADR425BRZ-REEL7 uses Analog Devices' patented XFET (eXtra implanted junction FET) technology. - Can the output voltage of the ADR425BRZ-REEL7 be adjusted?
Yes, the trim terminal can be used to adjust the output voltage over a ±0.5% range without compromising other performance parameters. - What are the typical applications of the ADR425BRZ-REEL7?
The device is suitable for precision conversion applications, optical networks, medical equipment, and industrial automation systems. - What is the quiescent current of the ADR425BRZ-REEL7?
The quiescent current is typically 500 µA with no load, and up to 600 µA over the operating temperature range. - What is the ripple rejection ratio of the ADR425BRZ-REEL7?
The ripple rejection ratio is −75 dB at 1 kHz. - What is the short-circuit current to ground for the ADR425BRZ-REEL7?
The short-circuit current to ground is 27 mA. - What are the available package options for the ADR425BRZ-REEL7?
The device is available in 8-lead SOIC and MSOP packages, with the MSOP being 30% smaller than the SOIC.
