Overview
The AD22105ARZ, manufactured by Analog Devices Inc., is a low-voltage, resistor-programmable thermostatic switch. This solid-state device allows for accurate temperature switching within a wide operating range of -40°C to +150°C using only one external programming resistor. The AD22105ARZ features a novel circuit architecture that asserts an open-collector output when the ambient temperature exceeds the user-programmed setpoint temperature. It is designed for operation in both battery-powered applications and industrial control systems, with a single power supply voltage range of 2.7 V to 7.0 V.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Ambient Setpoint Accuracy | ACC | - | - | ±2.0 | °C |
| Temperature Setpoint Accuracy | ACCT | - | - | ±3.0 | °C |
| Power Supply Rejection | PSR | - | - | ±0.15 | °C/V |
| Hysteresis | HYS | - | - | 4.1 | °C |
| Output Low Voltage | VOL | 250 | - | 400 | mV |
| Supply Voltage Range | VS | 2.7 | - | 7.0 | V |
| Supply Current (Output Low) | ISON | - | - | 120 | µA |
| Supply Current (Output High) | ISOFF | - | - | 90 | µA |
| Internal Pull-Up Resistor | RPULL-UP | 140 | 200 | 260 | kΩ |
| Turn-On Settling Time | tON | - | - | 5 | µs |
Key Features
- Resistor-programmable thermostatic switch with a wide operating temperature range of -40°C to +150°C.
- Single power supply voltage range from 2.7 V to 7.0 V, suitable for battery-powered and industrial applications.
- Low power dissipation (230 µW at 3.3 V) to minimize self-heating errors and maximize battery life.
- Approximately 4°C of hysteresis to prevent rapid thermal on/off cycling.
- Optional internal 200 kΩ pull-up resistor for driving light loads such as CMOS inputs or low power LED indicators.
- Open-collector output for flexibility in application.
Applications
The AD22105ARZ is versatile and can be used in various applications, including:
- Battery-powered devices where low power consumption is critical.
- Industrial control systems requiring precise temperature monitoring and control.
- Handheld and portable electronic equipment.
- Any system needing a reliable and accurate thermostatic switch.
Q & A
- What is the operating temperature range of the AD22105ARZ?
The AD22105ARZ operates within a temperature range of -40°C to +150°C. - How is the setpoint temperature programmed for the AD22105ARZ?
The setpoint temperature is programmed using a single external resistor. - What is the power supply voltage range for the AD22105ARZ?
The power supply voltage range is from 2.7 V to 7.0 V. - What is the typical power dissipation of the AD22105ARZ?
The typical power dissipation is 230 µW at 3.3 V. - Does the AD22105ARZ have an internal pull-up resistor?
Yes, it includes an optional internal 200 kΩ pull-up resistor. - What is the hysteresis of the AD22105ARZ?
The hysteresis is approximately 4°C. - What type of output does the AD22105ARZ have?
The AD22105ARZ has an open-collector output. - Can the AD22105ARZ drive a low power LED indicator directly?
Yes, it can drive a low power LED indicator directly. - What is the turn-on settling time of the AD22105ARZ?
The turn-on settling time is 5 µs. - Is the AD22105ARZ RoHS compliant?
Yes, the AD22105ARZ is RoHS compliant.
