Overview
The AD8403AN10 is a quad-channel, 256-position digitally controlled variable resistor (VR) device produced by Analog Devices. This device performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. It is part of the AD8400/AD8402/AD8403 family, which offers single, dual, or quad-channel configurations. The AD8403AN10 specifically contains four independent variable resistors, each with a fixed resistor and a wiper contact that taps the fixed resistor value based on a digital code loaded into the controlling serial input register.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Nominal Resistance | RAB | TA = 25°C | 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 | |
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V | 0.01 | 5 | μA | |
| Bandwidth (-3 dB) | BW | R = 10 kΩ | 600 kHz |
Key Features
- Quad-channel, 256-position digitally controlled variable resistor
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ fixed resistor options
- Power shutdown with less than 5 μA current draw
- 3-wire, SPI-compatible serial data input
- 10 MHz update data loading rate
- Single-supply operation from 2.7 V to 5.5 V
- Guaranteed operation over the 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
- Qualified for automotive applications
Q & A
- What is the AD8403AN10 used for? The AD8403AN10 is used as a digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- How many channels does the AD8403AN10 have? The AD8403AN10 has four independent channels.
- What are the available resistance values for the AD8403AN10? The available resistance values are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the power supply range for the AD8403AN10? The power supply range is from 2.7 V to 5.5 V.
- What is the bandwidth of the AD8403AN10? The bandwidth is 600 kHz for a 10 kΩ resistor at half scale.
- What are the package options for the AD8403AN10? The device is available in 24-lead PDIP, SOIC, and TSSOP packages.
- What is the temperature range for the AD8403AN10? The device operates over the extended industrial temperature range of −40°C to +125°C.
- How does the AD8403AN10 handle power shutdown? The device has a power shutdown feature with less than 5 μA current draw.
- What is the update data loading rate for the AD8403AN10? The update data loading rate is 10 MHz.
- Is the AD8403AN10 suitable for automotive applications? Yes, it is qualified for automotive applications.
