Overview
The AD8400ARZ100, produced by Analog Devices Inc., is a single-channel, 256-position digitally controlled variable resistor (VR) device. This device performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. It is housed in a compact 8-lead SOIC package, making it suitable for a variety of applications where space is limited. The AD8400ARZ100 operates with a single supply voltage ranging from 2.7 V to 5.5 V, which is beneficial for battery-powered and other low-voltage applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V, VDD = 5.5 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 | |
| Power Dissipation (CMOS) | PDISS | VIH = VDD or VIL = 0 V, VDD = 5.5 V | 27.5 | μW | ||
| Shutdown Current | IA_SD | VA = VDD, VB = 0 V, SHDN = 0 | 0.01 | 5 | μA | |
| Bandwidth -3 dB | BW_100K | R = 100 kΩ | 71 | kHz | ||
| Total Harmonic Distortion | THDW | VA = 1 V rms + 2 V dc, VB = 2 V dc, f = 1 kHz | 0.003 | % | ||
| Resistance Range | 1 kΩ, 10 kΩ, 50 kΩ, 100 kΩ |
Key Features
- 256-position digitally controlled variable resistor
- Replaces 1, 2, or 4 potentiometers with resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ
- Power shutdown with less than 5 μA current consumption
- 3-wire SPI-compatible serial data input with up to 10 MHz update data loading rate
- Single-supply operation from 2.7 V to 5.5 V
- Midscale preset and reset functionality
- Compact 8-lead SOIC package
- Operating temperature range from -40°C to +125°C
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 AD8400ARZ100 used for?
The AD8400ARZ100 is a digitally controlled variable resistor used to replace mechanical potentiometers in various applications.
- What are the available resistance values for the AD8400ARZ100?
The device is available with resistance values of 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the power supply range for the AD8400ARZ100?
The device operates with a single supply voltage ranging from 2.7 V to 5.5 V.
- How many positions does the AD8400ARZ100 have?
The device has 256 programmable positions.
- What is the shutdown current of the AD8400ARZ100?
The shutdown current is less than 5 μA.
- What is the operating temperature range of the AD8400ARZ100?
The device operates over an extended industrial temperature range of -40°C to +125°C.
- What type of interface does the AD8400ARZ100 use?
The device uses a 3-wire SPI-compatible serial data input interface.
- What is the maximum update data loading rate for the AD8400ARZ100?
The maximum update data loading rate is 10 MHz.
- Does the AD8400ARZ100 have a midscale preset?
Yes, the device has a midscale preset and reset functionality.
- What package type is the AD8400ARZ100 available in?
The device is available in an 8-lead SOIC package.
