Overview
The AD8402ARUZ10 from Analog Devices Inc. is a dual-channel, 256-position digitally controlled variable resistor (VR) device. This component is part of the AD8400/AD8402/AD8403 family, which replaces traditional mechanical potentiometers with digital control. The AD8402 specifically contains two independent variable resistors, making it ideal for applications requiring precise and programmable resistance adjustments.
The device operates within a single-supply voltage range of 2.7 V to 5.5 V and features a 3-wire SPI-compatible serial data input interface. It is available in a 14-lead TSSOP package, which is compact and suitable for surface-mount applications. The AD8402 is qualified for automotive and industrial use, ensuring reliability over an extended temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C, Model: AD840XYY10 | 8 | 10 | 12 | kΩ |
| Resistance Tempco | ΔRAB/ΔT | VAB = VDD, Wiper = No Connect | 500 | ppm/°C | ||
| Wiper Resistance | RW | VDD = 5V, IW = VDD/RAB | 50 | 100 | Ω | |
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V | 0.01 | 5 | μA | |
| Update Data Loading Rate | 10 | MHz |
Key Features
- 256-position digitally controlled variable resistor, allowing for precise resistance adjustments.
- Dual-channel configuration, providing two independent variable resistors.
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistance values.
- 3-wire SPI-compatible serial data input interface for easy control.
- Single-supply operation from 2.7 V to 5.5 V.
- Low power shutdown current of less than 5 μA.
- Compact 14-lead TSSOP package suitable for surface-mount applications.
- Qualified for automotive and industrial use with an extended temperature range of −40°C to +125°C.
Applications
- Mechanical potentiometer replacement in various electronic systems.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment and voltage regulation.
- Automotive and industrial control systems requiring precise and programmable resistance adjustments.
Q & A
- What is the AD8402ARUZ10 used for?
The AD8402ARUZ10 is a dual-channel, 256-position digitally controlled variable resistor used to replace mechanical potentiometers and provide precise resistance adjustments in various electronic systems.
- What are the available nominal resistance values for the AD8402?
The AD8402 is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistance values.
- What is the operating voltage range of the AD8402ARUZ10?
The AD8402ARUZ10 operates within a single-supply voltage range of 2.7 V to 5.5 V.
- What is the package type of the AD8402ARUZ10?
The AD8402ARUZ10 is available in a 14-lead TSSOP package.
- What is the temperature range for the AD8402ARUZ10?
The AD8402ARUZ10 is qualified to operate over an extended industrial temperature range of −40°C to +125°C.
- How many positions does the AD8402ARUZ10 have?
The AD8402ARUZ10 has 256 positions for each variable resistor.
- What is the update data loading rate of the AD8402ARUZ10?
The update data loading rate of the AD8402ARUZ10 is 10 MHz.
- Is the AD8402ARUZ10 suitable for automotive applications?
Yes, the AD8402ARUZ10 is qualified for automotive applications.
- What is the power shutdown current of the AD8402ARUZ10?
The power shutdown current of the AD8402ARUZ10 is less than 5 μA.
- What interface does the AD8402ARUZ10 use for control?
The AD8402ARUZ10 uses a 3-wire SPI-compatible serial data input interface for control.
