Overview
The AD8403ARU100-REEL, produced by Analog Devices Inc., is a quad-channel, 256-position, digitally controlled variable resistor (VR) device. This component is part of the AD8400/AD8402/AD8403 family, which provides electronic adjustment functions similar to mechanical potentiometers or variable resistors. The AD8403 specifically contains four independent variable resistors, available in 24-lead PDIP, SOIC, and TSSOP packages. Each variable resistor offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper, making it versatile for various applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C, Model: AD840XYY100 | 70 | 100 | 130 | kΩ |
| Resistance Tempco | ΔRAB/ΔT | VAB = VDD, Wiper = No Connect | 500 ppm/°C | |||
| Wiper Resistance | RW | VDD = 5V, IW = VDD/RAB | 50 | 100 | Ω | |
| Wiper Resistance | RW | VDD = 3V, IW = VDD/RAB | 200 | Ω | ||
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V | 0.01 | 5 μA | ||
| Supply Current (TTL) | IDD | VIH = 2.4 V or 0.8 V, VDD = 5.5 V | 0.9 | 4 mA | ||
| Operating Temperature Range | TA | -40°C | +125°C |
Key Features
- Quad-channel, 256-position, digitally controlled variable resistor.
- Available in 24-lead PDIP, SOIC, and TSSOP packages.
- Programmable resistance values: 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ.
- Power shutdown mode with less than 5 μA current consumption.
- 3-wire, SPI-compatible serial data input.
- 10 MHz update data loading rate.
- Single-supply operation from 2.7 V to 5.5 V.
- Midscale preset capability.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Programmable filters, delays, and time constants.
- Volume control and panning.
- Line impedance matching.
- Power supply adjustment.
Q & A
- What is the AD8403ARU100-REEL used for?
The AD8403ARU100-REEL is used as a quad-channel, digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the available resistance values for the AD8403?
The AD8403 offers programmable resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8403?
The AD8403 operates over an extended industrial temperature range of -40°C to +125°C.
- What is the power supply range for the AD8403?
The AD8403 operates with a single supply from 2.7 V to 5.5 V.
- What is the power consumption in shutdown mode?
In power shutdown mode, the current consumption is less than 5 μA.
- What is the update data loading rate for the AD8403?
The update data loading rate is 10 MHz.
- Is the AD8403 qualified for automotive applications?
Yes, the AD8403 is qualified for automotive applications.
- What are the package options for the AD8403?
The AD8403 is available in 24-lead PDIP, SOIC, and TSSOP packages.
- What is the wiper resistance of the AD8403?
The wiper resistance is typically 50 Ω at VDD = 5V and 200 Ω at VDD = 3V.
- What is the resistance temperature coefficient of the AD8403?
The resistance temperature coefficient is 500 ppm/°C.
