Overview
The AD5243BRM100-RL7, produced by Analog Devices Inc., is a dual, 256-position, I2C-compatible digital potentiometer. This device is designed for precision and versatility in various electronic systems. It operates from a single supply voltage ranging from 2.7 V to 5.5 V and consumes less than 6 µA, making it suitable for battery-operated and low-power applications. The AD5243 features an internal power-on preset that sets the wiper to midscale during power-up, simplifying fault condition recovery.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2.7 | 5.5 | V | |
| Supply Current (IDD) | 6 | µA | ||
| Operating Temperature | -40 | 125 | °C | |
| Number of Positions | 256 | |||
| Nominal Resistance (RAB) | 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | Ω | ||
| Wiper Resistance (RW) | 160 | Ω | ||
| Input Logic High (VIH) | 2.4 (VDD=5V), 2.1 (VDD=3V) | V | ||
| Input Logic Low (VIL) | 0.8 (VDD=5V), 0.6 (VDD=3V) | V | ||
| Power Dissipation (PDISS) | 30 | µW |
Key Features
- I2C-compatible interface for easy communication and control.
- Low power consumption: less than 6 µA.
- Wide operating temperature range: -40°C to +125°C.
- Internal power-on preset to midscale for simplified fault recovery.
- Available in various nominal resistance values: 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- Low temperature coefficient: 35 ppm/°C.
- Extra package address decode pins (AD0 and AD1) for the AD5248 model.
Applications
- Systems calibrations and electronics level settings.
- Replacement of mechanical trimmers in new designs.
- Permanent factory settings on printed circuit boards (PCBs).
- Adjustment of transducers for pressure, temperature, position, chemical, and optical sensors.
- RF amplifier biasing and gain control.
- Offset adjustment in various electronic systems.
Q & A
- What is the operating voltage range of the AD5243?
The AD5243 operates from a single supply voltage ranging from 2.7 V to 5.5 V. - How much power does the AD5243 consume?
The AD5243 consumes less than 6 µA. - What is the operating temperature range of the AD5243?
The operating temperature range is from -40°C to +125°C. - How many positions does the AD5243 have?
The AD5243 has 256 positions. - What are the available nominal resistance values for the AD5243?
The available nominal resistance values are 2.5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. - What is the wiper resistance of the AD5243?
The wiper resistance (RW) is approximately 160 Ω. - Does the AD5243 have an internal power-on preset?
Yes, the AD5243 has an internal power-on preset that sets the wiper to midscale during power-up. - What interface does the AD5243 use for communication?
The AD5243 uses an I2C-compatible interface. - What are some common applications of the AD5243?
Common applications include systems calibrations, electronics level settings, replacement of mechanical trimmers, and adjustments for various sensors. - Does the AD5243 have any special features for addressing?
Yes, the AD5248 model has extra package address decode pins (AD0 and AD1).
