Overview
The ADR225HRZN is a precision 2.5 V band gap voltage reference produced by Analog Devices Inc. It is designed for high temperature operation, making it suitable for extreme environmental conditions. The device uses a micropower core topology and laser trimming of highly stable, thin film resistors to achieve high accuracy and stability. It is available in two package types: an 8-lead SOIC package with an operating temperature range of −40°C to +175°C, and an 8-lead ceramic flat pack (FLATPACK) with an operating temperature range of −40°C to +210°C. Both packages are qualified for 1000 hours of operation at the maximum temperature rating, ensuring robustness and reliability in high-temperature environments.
Key Specifications
| Parameter | Symbol | Test Conditions/Comments | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Supply Current | ISY | No load | 30 | 50 | 60 | µA |
| Initial Accuracy | VO | IOUT = 0 mA | ±2 | ±10 | ±5 | mV |
| Temperature Coefficient | TCVOUT | IOUT = 0 mA | 10 | 30 | 40 | ppm/°C |
| Line Regulation | ΔVOUT/ΔVIN | 3.0 V ≤ VS ≤ 15 V, IOUT = 0 mA | 0.025 | 0.1 | 0.25 | mV/V |
| Load Regulation | ΔVOUT/ΔILOAD | VS = 5.0 V, 0 mA ≤ IOUT ≤ 10 mA | 0.025 | 0.1 | 0.25 | mV/mA |
| Dropout Voltage | VS - VOUT | ILOAD = 10 mA | 1.00 | 1.00 | V | |
| Noise Voltage | eN | 0.1 Hz to 10 Hz | 25 | 25 | µV p-p |
Key Features
- Precision 2.5 V band gap voltage reference
- High temperature operation: up to 175°C (SOIC) and up to 210°C (FLATPACK)
- Micropower core topology with a maximum operating current of 50 µA
- Low dropout voltage, suitable for battery-powered equipment
- High initial accuracy: ±0.4% (±10 mV maximum)
- Low temperature coefficient: 30 ppm/°C (maximum) up to 175°C
- Wide supply range: 3.3 V to 16 V
- Qualified for 1000 hours of operation at the maximum temperature rating
Applications
- Down-hole drilling and instrumentation
- Avionics
- Heavy industrial environments
- High temperature environments
Q & A
- What is the operating temperature range of the ADR225HRZN in SOIC and FLATPACK packages?
The operating temperature range for the SOIC package is −40°C to +175°C, and for the FLATPACK package, it is −40°C to +210°C.
- What is the initial accuracy of the ADR225HRZN?
The initial accuracy is ±0.4% (±10 mV maximum).
- What is the maximum operating current of the ADR225HRZN?
The maximum operating current is 50 µA.
- What is the temperature coefficient of the ADR225HRZN?
The temperature coefficient is 30 ppm/°C (maximum) up to 175°C.
- What are the typical applications of the ADR225HRZN?
Typical applications include down-hole drilling and instrumentation, avionics, heavy industrial environments, and high temperature environments.
- What is the dropout voltage of the ADR225HRZN?
The dropout voltage is 1.00 V at ILOAD = 10 mA.
- What is the noise voltage of the ADR225HRZN?
The noise voltage is 25 µV p-p from 0.1 Hz to 10 Hz.
- Is the ADR225HRZN qualified for long-term operation at high temperatures?
Yes, it is qualified for 1000 hours of operation at the maximum temperature rating.
- What is the supply voltage range for the ADR225HRZN?
The supply voltage range is 3.3 V to 16 V.
- What package types are available for the ADR225HRZN?
The ADR225HRZN is available in an 8-lead SOIC package and an 8-lead ceramic flat pack (FLATPACK).
