Overview
The AD8402AN10, produced 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 is part of the AD8400/AD8402/AD8403 family, which includes single, dual, and quad-channel versions. The AD8402 specifically contains two independent variable resistors in a space-saving SOIC-14 surface-mount package or a 14-lead PDIP package. Each variable resistor offers a completely programmable value of resistance between the A terminal and the wiper or the B terminal and the wiper, with fixed A-to-B terminal resistances of 1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ.
Key Specifications
| Parameter | Symbol | Conditions | Min | 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 | |
| Power Supply Range | VDD Range | 2.7 | 5.5 | V | ||
| Supply Current (CMOS) | IDD | VIH = VDD or VIL = 0 V | 0.01 | 5 μA | ||
| Bandwidth -3 dB | BW_10K | R = 10 kΩ | 600 kHz | |||
| Total Harmonic Distortion | THDW | VA = 1 V rms + 2 V dc, VB = 2 V dc, f = 1 kHz | 0.003 % |
Key Features
- 256-position digitally controlled variable resistor
- Replaces 1, 2, or 4 potentiometers with resistances of 1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ
- Power shutdown with less than 5 μA current
- 3-wire SPI-compatible serial data input
- 10 MHz update data loading rate
- 2.7 V to 5.5 V single-supply operation
- Midscale preset
- Extended industrial temperature range of –40°C to +125°C
- Available in SOIC-14, PDIP-14, and TSSOP-14 packages
Applications
- Mechanical potentiometer replacement
- Programmable filters, delays, time constants
- Volume control, panning
- Line impedance matching
- Power supply adjustment
Q & A
- What is the AD8402AN10 used for?
The AD8402AN10 is used as a dual-channel, 256-position digitally controlled variable resistor, replacing mechanical potentiometers or variable resistors in various applications.
- What are the available resistance values for the AD8402AN10?
The AD8402AN10 is available with fixed A-to-B terminal resistances of 1 kΩ, 10 kΩ, 50 kΩ, or 100 kΩ.
- What is the power supply range for the AD8402AN10?
The power supply range for the AD8402AN10 is from 2.7 V to 5.5 V.
- What is the maximum bandwidth of the AD8402AN10?
The maximum bandwidth for the 10 kΩ version is 600 kHz.
- What is the total harmonic distortion of the AD8402AN10?
The total harmonic distortion is 0.003% at 1 kHz.
- What are the package options for the AD8402AN10?
The AD8402AN10 is available in SOIC-14, PDIP-14, and TSSOP-14 packages.
- What is the operating temperature range for the AD8402AN10?
The operating temperature range is from –40°C to +125°C.
- How does the AD8402AN10 handle power shutdown?
The AD8402AN10 has a power shutdown feature that reduces current to less than 5 μA.
- What is the update data loading rate for the AD8402AN10?
The update data loading rate is 10 MHz.
- Is the AD8402AN10 suitable for automotive applications?
Yes, the AD8402AN10 is qualified for automotive applications.
