Overview
The AD8403ARZ100, produced by Analog Devices Inc., is a 4-channel digital potentiometer that offers a digitally controlled variable resistor (VR) function. This device is part of the AD8400/AD8402/AD8403 series, which provides single-, dual-, or quad-channel configurations. The AD8403 specifically contains four independent variable resistors, making it suitable for applications requiring multiple programmable resistances.
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 various packages, including 24-lead PDIP, SOIC, and TSSOP, ensuring flexibility in design and implementation.
The AD8403ARZ100 is designed to replace mechanical potentiometers and variable resistors, offering precise digital control over resistance values. It is qualified for automotive applications and operates over an extended industrial temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Number of Channels | - | - | 4 | - | - | - |
| Number of Positions | - | - | 256 | - | - | - |
| Operating Temperature Range | - | - | -40 | - | 125 | °C |
| Nominal Resistance | RAB | TA = 25°C | 70 | 100 | 130 | kΩ |
| Resistance Tempco | ΔRAB/ΔT | VAB = VDD, Wiper = No Connect | - | 500 | - | ppm/°C |
| Power Supply Voltage | VDD | - | 2.7 | - | 5.5 | V |
| Power Shutdown Current | - | - | - | - | < 5 | μA |
| Update Data Loading Rate | - | - | - | - | 10 | MHz |
Key Features
- 4 independent variable resistors with 256-position resolution.
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistance options.
- 3-wire, SPI-compatible serial data input interface.
- 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 draw.
- Midscale preset via reset (RS) pin.
- Extended industrial temperature range of −40°C to +125°C.
- Available in 24-lead PDIP, SOIC, and TSSOP packages.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning.
- Line impedance matching.
- Power supply adjustment.
- Automotive applications.
Q & A
- What is the AD8403ARZ100 used for?
The AD8403ARZ100 is a 4-channel digital potentiometer used to replace mechanical potentiometers and variable resistors, offering precise digital control over resistance values.
- What are the available resistance options for the AD8403ARZ100?
The device is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistance options.
- What is the operating temperature range of the AD8403ARZ100?
The device operates over an extended industrial temperature range of −40°C to +125°C.
- What is the power shutdown current of the AD8403ARZ100?
The device has a power shutdown current of less than 5 μA.
- What is the update data loading rate of the AD8403ARZ100?
The device has an update data loading rate of 10 MHz.
- What are the package options for the AD8403ARZ100?
The device is available in 24-lead PDIP, SOIC, and TSSOP packages.
- Is the AD8403ARZ100 suitable for automotive applications?
Yes, the device is qualified for automotive applications.
- How does the AD8403ARZ100 handle midscale preset?
The device has a reset (RS) pin that forces the wiper to midscale by loading 80H into the VR latch.
- What is the resistance temperature coefficient of the AD8403ARZ100?
The resistance temperature coefficient is 500 ppm/°C.
- Can the AD8403ARZ100 be used in multiple VR applications?
Yes, the device allows simple daisy chaining in multiple VR applications without additional external decoding logic.
