Overview
The AD589TH is a 2-terminal, low-cost, temperature-compensated bandgap voltage reference produced by Analog Devices. It provides a fixed 1.23 V output voltage for input currents ranging from 50 µA to 5.0 mA. This component is known for its high stability, which is primarily dependent on the matching and thermal tracking of the on-chip components. The AD589TH is part of a series that includes various grades, each with different temperature specifications, making it versatile for a wide range of applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage at 25°C | 1.200 | 1.235 | 1.250 | V |
| Output Voltage Change vs. Current (50 µA to 5 mA) | - | 5 | 5 | mV |
| Dynamic Output Impedance | - | 0.6 | 2 | Ω |
| RMS Noise Voltage (10 Hz < f < 10 kHz) | - | 5 | 5 | µV |
| Temperature Coefficient | - | 10 | - | ppm/°C |
| Turn-On Settling Time to 0.1% | - | 25 | - | µs |
| Operating Current | 0.05 | - | 5 | mA |
| Operating Temperature | -55 | - | 125 | °C |
| Package Option | - | Metal Can (H-02) | - | - |
Key Features
- Constant Reference Voltage: Provides a fixed 1.23 V output voltage for a wide range of input currents (50 µA to 5.0 mA).
- Low Output Impedance: 0.6 Ω, ten times lower than typical low-TC Zener diodes, ensuring stable output voltage under changing load conditions.
- Temperature Stability: Temperature coefficients as low as 10 ppm/°C ensure stable output voltage over a wide range of operating conditions.
- Low Power Consumption: Operates with a total current as low as 50 µA (60 µW total power dissipation), ideal for battery-powered instrument applications.
- Flexible Operation: Can be operated as a positive or negative reference, and floating operation is also possible.
- No External Components Required: Maintains full accuracy without the need for external components.
- MIL-STD-883 Compliant Versions Available: Suitable for military and aerospace applications.
Applications
- Battery-Powered Instruments: Ideal due to its low power consumption and stable output voltage.
- Military and Aerospace: Versions compliant with MIL-STD-883 make it suitable for these applications.
- General Voltage Reference Needs: Can replace other 1.2 V references with superior temperature performance and reduced sensitivity to capacitive loading.
- Industrial and Commercial Systems: Suitable for a wide range of industrial and commercial applications requiring stable voltage references.
Q & A
- What is the output voltage of the AD589TH?
The AD589TH provides a fixed 1.23 V output voltage.
- What is the range of input currents for the AD589TH?
The input current range is from 50 µA to 5.0 mA.
- What is the typical output impedance of the AD589TH?
The typical output impedance is 0.6 Ω.
- How does the AD589TH perform in terms of temperature stability?
The AD589TH has temperature coefficients as low as 10 ppm/°C.
- Can the AD589TH be used in battery-powered applications?
Yes, it is ideal for battery-powered instrument applications due to its low power consumption.
- Does the AD589TH require external components to maintain accuracy?
No, it maintains full accuracy without the need for external components.
- Is the AD589TH available in versions compliant with MIL-STD-883?
Yes, versions compliant with MIL-STD-883 are available.
- What are the operating temperature ranges for the AD589TH?
The operating temperature range is from -55°C to +125°C.
- In what packages is the AD589TH available?
The AD589TH is available in a metal can (H-02) package and also in an 8-lead SOIC package for some grades.
- Can the AD589TH be used as a positive or negative reference?
Yes, it can be operated as a positive or negative reference, and floating operation is also possible.
