Overview
The AD8402ARUZ10-REEL, produced by Analog Devices Inc., is a 2-channel digital potentiometer. This device is part of the AD8400/AD8402/AD8403 series, which provides single-, dual-, or quad-channel digitally controlled variable resistors. The AD8402 specifically contains two independent variable resistors, offering a compact solution in a 14-lead TSSOP package. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors, making them ideal for various applications requiring precise and programmable resistance control.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Nominal Resistance (RAB) | TA = 25°C | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ | - | - | kΩ |
| Resistance Tempco (ΔRAB/ΔT) | VAB = VDD, Wiper = No Connect | - | 500 ppm/°C | - | ppm/°C |
| Wiper Resistance (RW) | VDD = 5V, IW = VDD/RAB | 50 | 100 | - | Ω |
| Supply Voltage Range (VDD) | - | 2.7 | - | 5.5 | V |
| Supply Current (IDD) - CMOS | VIH = VDD or VIL = 0 V | 0.01 | - | 5 μA | μA |
| Power Dissipation (PDISS) - CMOS | VIH = VDD or VIL = 0 V, VDD = 5.5 V | - | 27.5 | - | μW |
| Operating Temperature Range | - | -40 | - | 125 | °C |
Key Features
- 256-position digitally controlled variable resistor.
- Two independent variable resistors in a 14-lead TSSOP package.
- Programmable resistance between the A terminal and the wiper or the B terminal and the wiper.
- Linear resistance variation with respect to the digital code.
- Power shutdown with less than 5 μA current draw.
- 3-wire, SPI-compatible serial data input with a 10 MHz update data loading rate.
- Single-supply operation from 2.7 V to 5.5 V.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning.
- Line impedance matching.
- Power supply adjustment.
Q & A
- What is the AD8402ARUZ10-REEL used for? The AD8402ARUZ10-REEL is used as a 2-channel digital potentiometer, replacing mechanical potentiometers and providing programmable resistance control.
- What are the available resistance values for the AD8402? The AD8402 is available with nominal resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8402ARUZ10-REEL? The operating temperature range is from -40°C to 125°C.
- What is the supply voltage range for the AD8402? The supply voltage range is from 2.7 V to 5.5 V.
- How many positions does the digital potentiometer have? The digital potentiometer has 256 positions.
- What is the power dissipation of the AD8402 in CMOS mode? The power dissipation in CMOS mode is 27.5 μW.
- Is the AD8402 qualified for automotive applications? Yes, the AD8402 is qualified for automotive applications.
- What is the wiper resistance of the AD8402? The wiper resistance is typically 100 Ω at VDD = 5V and IW = VDD/RAB.
- What is the resistance temperature coefficient of the AD8402? The resistance temperature coefficient is 500 ppm/°C.
- What communication protocol does the AD8402 use? The AD8402 uses a 3-wire, SPI-compatible serial data input.
