Overview
The AD8400AR100-REEL, produced by Analog Devices Inc., is a single-channel, 256-position, digitally controlled variable resistor (VR) device. This component is part of the AD8400 series, which includes the AD8402 and AD8403 models offering dual and quad channels, respectively. The AD8400 performs the same electronic adjustment function as a mechanical potentiometer or variable resistor, making it a versatile replacement in various applications.
The device is housed in an 8-lead SOIC package and operates on a single supply voltage ranging from 2.7 V to 5.5 V, making it suitable for battery-powered applications. It features a 3-wire SPI-compatible serial data input interface with an update data loading rate of up to 10 MHz.
Key Specifications
| Parameter | Conditions | Min | Typ | 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 | ||
| Power Supply Range (VDD) | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | VIH = VDD or VIL = 0 V | 0.01 | 5 | μA | |
| Power Dissipation (CMOS) | VIH = VDD or VIL = 0 V, VDD = 5.5 V | 27.5 | μW |
Key Features
- 256-position digitally controlled variable resistor
- Available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ nominal resistance values
- ±1% channel-to-channel matching tolerance
- Power shutdown mode with less than 5 μA current consumption
- 3-wire SPI-compatible serial data input interface
- Update data loading rate of up to 10 MHz
- Single-supply operation from 2.7 V to 5.5 V
- Midscale preset and reset functionality
- Compact 8-lead SOIC package
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, and time constants
- Volume control and panning
- Line impedance matching
- Power supply adjustment
- Battery-powered applications due to low power consumption
- Automotive applications due to qualified temperature range of −40°C to +125°C
Q & A
- What is the nominal resistance range of the AD8400AR100-REEL?
The nominal resistance range is 100 kΩ, with a tolerance of ±1%.
- What is the operating voltage range of the AD8400AR100-REEL?
The device operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the power consumption in shutdown mode?
The power consumption in shutdown mode is less than 5 μA.
- What type of interface does the AD8400AR100-REEL use?
The device uses a 3-wire SPI-compatible serial data input interface.
- What is the maximum update data loading rate?
The maximum update data loading rate is up to 10 MHz.
- What is the temperature range for the AD8400AR100-REEL?
The device is qualified for a temperature range of −40°C to +125°C.
- What package type is the AD8400AR100-REEL available in?
The device is available in an 8-lead SOIC package.
- Can the AD8400AR100-REEL be used in automotive applications?
Yes, it is qualified for automotive applications due to its temperature range and other specifications.
- What is the wiper resistance of the AD8400AR100-REEL?
The wiper resistance is typically 50-100 Ω at VDD = 5V).
- How does the power shutdown feature work?
The SHDN pin forces the resistor to an end-to-end open-circuit condition on the A terminal and shorts the wiper to the B terminal, achieving a microwatt power shutdown state).
