Overview
The AD8402ARZ10-REEL, manufactured by Analog Devices Inc., is a dual-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 features two independent variable resistors in a space-saving 14-lead SOIC surface-mount package. Each variable resistor includes a fixed resistor with a wiper contact that taps the fixed resistor value based on a digital code loaded into the controlling serial input register. The device operates over an extended industrial temperature range of −40°C to +125°C, making it suitable for various applications requiring precise and programmable resistance control.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | 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 | - |
| Wiper Resistance | RW | VDD = 3V, IW = VDD/RAB | 200 | - | - Ω | - |
| Supply Voltage | VDD | - | 2.7 | - | 5.5 V | |
| Power Shutdown Current | - | - | - | - | < 5 μA | |
| Update Data Loading Rate | - | - | - | - | 10 MHz |
Key Features
- Dual-channel, 256-position digitally controlled variable resistor.
- Available in 14-lead SOIC surface-mount package.
- Operates over an extended industrial temperature range of −40°C to +125°C.
- Single-supply operation from 2.7 V to 5.5 V.
- 3-wire, SPI-compatible serial data input.
- 10 MHz update data loading rate.
- Power shutdown current less than 5 μA.
- Nominal resistance values of 1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ.
- ±1% channel-to-channel matching tolerance.
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 AD8402ARZ10-REEL used for?
The AD8402ARZ10-REEL is used as a dual-channel, digitally controlled variable resistor, replacing mechanical potentiometers and providing precise resistance control in various applications.
- What are the available nominal resistance values for the AD8402?
The nominal resistance values available are 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD8402ARZ10-REEL?
The device operates over an extended industrial temperature range of −40°C to +125°C.
- What is the supply voltage range for the AD8402ARZ10-REEL?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the update data loading rate of the AD8402ARZ10-REEL?
The update data loading rate is 10 MHz.
- What is the power shutdown current of the AD8402ARZ10-REEL?
The power shutdown current is less than 5 μA.
- What package types are available for the AD8402?
The AD8402 is available in 14-lead SOIC and PDIP packages, as well as in TSSOP packages for certain models.
- Is the AD8402 qualified for automotive applications?
Yes, the AD8402 is qualified for automotive applications.
- What are some common applications of the AD8402?
Common applications include mechanical potentiometer replacement, programmable filters, delays, time constants, volume control, panning, line impedance matching, and power supply adjustment.
- What is the channel-to-channel matching tolerance of the AD8402?
The channel-to-channel matching tolerance is ±1%.
