Overview
The AD8402ARU10-REEL, produced by Analog Devices Inc., is a dual-channel, 256-position digital potentiometer. This device is part of the AD8400/AD8402/AD8403 family, which provides digitally controlled variable resistor functionality, similar to that of mechanical potentiometers or variable resistors. The AD8402 specifically contains two independent variable resistors in a space-saving 14-lead TSSOP package. It operates over an extended industrial temperature range of −40°C to +125°C, making it suitable for a wide range of applications.
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 | |
| Nominal Resistance Match | ΔR/RAB | CH 1 to CH 2, VAB = VDD, TA = 25°C | 0.2 | 1 | % | |
| Resolution | N | 8 Bits | ||||
| Integral Nonlinearity | INL | VDD = 5 V | -2 | ±1/2 | +2 | LSB |
| Differential Nonlinearity | DNL | VDD = 5 V | -1 | ±1/4 | +1 | LSB |
| Supply Voltage | VDD | 2.7 | 5.5 | V | ||
| Operating Temperature | TA | -40 | +125 | °C |
Key Features
- Dual-channel, 256-position digital potentiometer
- Available in 14-lead TSSOP package
- Operates over an extended industrial temperature range of −40°C to +125°C
- 3-wire, SPI-compatible serial data input
- 10 MHz update data loading rate
- Single-supply operation: 2.7 V to 5.5 V
- Low power shutdown: less than 5 μA
- High resolution: 8-bit resolution for precise control
- Programmable resistance: completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, and time constants
- Volume control and panning
- Line impedance matching
- Power supply adjustment
- Automotive applications due to its extended temperature range and reliability
Q & A
- What is the AD8402ARU10-REEL used for?
The AD8402ARU10-REEL is used as a dual-channel digital potentiometer, replacing mechanical potentiometers and providing precise digital control over resistance values.
- 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 resolution of the AD8402?
The AD8402 has an 8-bit resolution, providing 256 positions for each channel.
- What is the operating temperature range of the AD8402?
The AD8402 operates over an extended industrial temperature range of −40°C to +125°C.
- What is the supply voltage range for the AD8402?
The AD8402 operates with a single-supply voltage range of 2.7 V to 5.5 V.
- How does the AD8402 communicate?
The AD8402 uses a 3-wire, SPI-compatible serial data input for communication.
- What is the power consumption in shutdown mode?
In shutdown mode, the AD8402 consumes less than 5 μA.
- What are some common applications of the AD8402?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
- Is the AD8402 suitable for automotive applications?
- What package types are available for the AD8402?
The AD8402 is available in 14-lead PDIP, SOIC, and TSSOP packages.
