Overview
The AD8402ARUZ100-REEL is a 2-channel digital potentiometer produced by Analog Devices Inc. This device is part of the AD8400/AD8402/AD8403 series, which provides digitally controlled variable resistor functionality. The AD8402 specifically contains two independent variable resistors in a compact 14-lead TSSOP package. Each variable resistor offers 256 programmable positions, allowing for precise control over resistance values. This component is designed to replace mechanical potentiometers and variable resistors in various applications, offering advantages such as programmability, low power consumption, and high reliability.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Nominal Resistance (RAB) | TA = 25°C | 70 | 100 | 130 | kΩ |
| Resistance Temperature Coefficient (ΔRAB/ΔT) | VAB = VDD, Wiper = No Connect | 500 | ppm/°C | ||
| Wiper Resistance (RW) | VDD = 5V, IW = VDD/RAB | 53 | 100 | Ω | |
| Wiper Resistance (RW) | VDD = 3V, IW = VDD/RAB | 200 | Ω | ||
| Supply Voltage (VDD) | 2.7 | 5.5 | V | ||
| Operating Temperature Range (TA) | -40 | 125 | °C | ||
| Number of Taps | 256 | ||||
| Package Type | 14-Lead TSSOP |
Key Features
- 2-channel digital potentiometer with 256 programmable positions per channel.
- Nominal resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- 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.
- Power shutdown mode with less than 5 μA current consumption.
- Midscale preset via the reset (RS) pin.
- Compact 14-lead TSSOP package.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment.
- Automotive applications requiring precise and reliable variable resistance control.
Q & A
- What is the AD8402ARUZ100-REEL used for?
The AD8402ARUZ100-REEL is a 2-channel digital potentiometer used to replace mechanical potentiometers and variable resistors in various applications, offering programmable resistance control.
- What are the nominal resistance values available 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 AD8402ARUZ100-REEL?
The operating temperature range is from -40°C to 125°C.
- How many programmable positions does each channel of the AD8402 have?
Each channel has 256 programmable positions.
- What is the power consumption in shutdown mode?
The power consumption in shutdown mode is less than 5 μA.
- What type of serial interface does the AD8402 use?
The AD8402 uses a 3-wire SPI-compatible serial data input.
- What is the maximum data loading rate for the AD8402?
The maximum data loading rate is 10 MHz.
- Can the AD8402 be used in automotive applications?
Yes, the AD8402 is qualified for automotive applications.
- How does the reset (RS) pin function on the AD8402?
The reset (RS) pin forces the wiper to midscale by loading 80H into the VR latch.
- What is the package type of the AD8402ARUZ100-REEL?
The package type is a 14-lead TSSOP.
