Overview
The AD8402ARUZ1, produced by Analog Devices Inc., is a 2-channel digital potentiometer that offers a digitally controlled variable resistor (VR) function. This device is part of the AD8400/AD8402/AD8403 family, which provides single-, dual-, or quad-channel configurations. The AD8402 specifically contains two independent variable resistors, making it suitable for applications requiring precise electronic adjustments similar to those of mechanical potentiometers or variable resistors.
The device operates over an extended industrial temperature range of −40°C to +125°C and is available in a 14-lead TSSOP package, making it compact and suitable for various surface-mount applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C | 0.8 | 1.2 | 1.6 | kΩ (for 1 kΩ model) |
| Nominal Resistance | RAB | TA = 25°C | 35 | 50 | 65 | kΩ (for 50 kΩ model) |
| Nominal Resistance | RAB | TA = 25°C | 70 | 100 | 130 | kΩ (for 100 kΩ model) |
| Resistance Tempco | ΔRAB/ΔT | VAB = VDD, Wiper = No Connect | - | - | 500 ppm/°C | - |
| Wiper Resistance | RW | VDD = 5V, IW = VDD/RAB | - | - | 100 Ω | - |
| Supply Voltage | VDD | - | 2.7 | - | 5.5 | V |
| Update Data Loading Rate | - | - | - | - | 10 MHz | - |
| Number of Taps | - | - | - | - | 256 | - |
Key Features
- 2-channel digital potentiometer with 256-position resolution.
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistance values.
- 3-wire, SPI-compatible serial data input interface.
- Single-supply operation from 2.7 V to 5.5 V.
- Extended industrial temperature range: −40°C to +125°C.
- Compact 14-lead TSSOP package.
- Low power shutdown mode: less than 5 μA.
- High bandwidth and low total harmonic distortion.
- Programmable 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 in audio systems.
- Line impedance matching.
- Power supply adjustment.
- Automotive applications due to its extended temperature range and reliability.
Q & A
- What is the AD8402ARUZ1 used for?
The AD8402ARUZ1 is used as a digital potentiometer, providing a digitally controlled variable resistor function similar to a mechanical potentiometer or variable resistor.
- What are the available nominal resistance values for the AD8402ARUZ1?
The available nominal resistance values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8402ARUZ1?
The device operates over an extended industrial temperature range of −40°C to +125°C.
- What is the supply voltage range for the AD8402ARUZ1?
The supply voltage range is from 2.7 V to 5.5 V.
- How many taps does the AD8402ARUZ1 have?
The device has 256 taps.
- What interface does the AD8402ARUZ1 use for data input?
The device uses a 3-wire, SPI-compatible serial data input interface.
- What is the package type of the AD8402ARUZ1?
The device is available in a 14-lead TSSOP package.
- What is the power consumption in shutdown mode?
The power consumption in shutdown mode is less than 5 μA.
- What are some common applications of the AD8402ARUZ1?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
- Is the AD8402ARUZ1 suitable for automotive applications?
