Overview
The AD8403ARUZ10, produced by Analog Devices Inc., is a quad-channel, 256-position digitally controlled variable resistor (VR) device. This component performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. It is available in 24-lead PDIP, SOIC, and TSSOP packages, making it versatile for various applications. Each variable resistor in the AD8403 offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper, controlled by a digital code loaded into the serial input register.
Key Specifications
| Parameter | Conditions | Min | 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 |
| Supply Voltage Range (VDD) | - | 2.7 | - | 5.5 | V |
| Supply Current (IDD) - CMOS | VIH = VDD or VIL = 0 V, VDD = 5.5 V | 0.01 | - | 5 | 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
- Quad-channel, 256-position digitally controlled variable resistor.
- Available in 24-lead PDIP, SOIC, and TSSOP packages.
- Single-supply operation from 2.7 V to 5.5 V.
- 3-wire, SPI-compatible serial data input with a 10 MHz update data loading rate.
- Power shutdown current less than 5 μA.
- Unique switching circuit minimizes high glitch, avoiding make-before-break or break-before-make operation.
- Qualified for automotive applications and operates over the extended industrial temperature range of −40°C to +125°C.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning in audio systems.
- Line impedance matching.
- Power supply adjustment.
Q & A
- What is the AD8403ARUZ10 used for?
The AD8403ARUZ10 is used as a digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the available packages for the AD8403ARUZ10?
The AD8403ARUZ10 is available in 24-lead PDIP, SOIC, and TSSOP packages.
- What is the operating voltage range of the AD8403ARUZ10?
The AD8403ARUZ10 operates from a single supply of 2.7 V to 5.5 V.
- How many positions does the AD8403ARUZ10 have?
The AD8403ARUZ10 has 256 positions for each of its four variable resistors.
- What is the temperature range for the AD8403ARUZ10?
The AD8403ARUZ10 operates over the extended industrial temperature range of −40°C to +125°C.
- What is the power shutdown current of the AD8403ARUZ10?
The power shutdown current of the AD8403ARUZ10 is less than 5 μA.
- Is the AD8403ARUZ10 suitable for automotive applications?
Yes, the AD8403ARUZ10 is qualified for automotive applications.
- What is the update data loading rate for the AD8403ARUZ10?
The update data loading rate for the AD8403ARUZ10 is 10 MHz.
- How does the AD8403ARUZ10 minimize glitches?
The AD8403ARUZ10 minimizes high glitches through a unique switching circuit that avoids make-before-break or break-before-make operation.
- What are some common applications of the AD8403ARUZ10?
Common applications include mechanical potentiometer replacement, programmable filters, volume control, line impedance matching, and power supply adjustment.
