Overview
The AD5282BRUZ20-REEL7, produced by Analog Devices Inc., is a dual-channel, 256-position, digitally controlled variable resistor (VR). This device functions similarly to a potentiometer, trimmer, or variable resistor, offering a completely programmable resistance value between the A terminal and the wiper or the B terminal and the wiper. It is part of the AD5280/AD5282 series, which features single and dual-channel configurations. The AD5282 is particularly useful for applications requiring precise digital control over resistance values.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Fixed Terminal Resistance | RAB | 20 kΩ, 50 kΩ, 200 kΩ | Ω | |||
| Temperature Coefficient | 30 | ppm/°C | ||||
| Operating Temperature | -40 | 85 | °C | |||
| Single-Supply Range | VDD | VSS = 0 V | 4.5 | 16.5 | V | |
| Dual-Supply Range | VDD/SS | ±4.5 | ±5.5 | V | ||
| Logic Supply Current | ILOGIC | VLOGIC = 5 V | 60 | μA | ||
| Power Dissipation | PDISS | VDD = +5 V, VSS = -5 V | 0.2 | 0.3 | mW | |
| Bandwidth (-3 dB) | BW | RAB = 20 kΩ, Code = 0x80 | 310 | kHz |
Key Features
- I2C-Compatible Interface: The AD5282 features an I2C-compatible, 2-wire serial data interface for programming the VR settings.
- Power-on Midscale Preset: The device has an internal power-on preset that places the wiper at midscale during power-on, simplifying fault condition recovery.
- Programmable Reset: The device allows for programmable reset, enhancing flexibility in system design.
- Low Temperature Coefficient: A nominal temperature coefficient of 30 ppm/°C ensures stable performance across a wide temperature range.
- High Channel-to-Channel Matching: The fixed A-to-B terminal resistance has a 1% channel-to-channel matching tolerance.
- Multiple Package Options: Available in thin, surface-mounted 14-lead and 16-lead TSSOP packages.
- Extended Industrial Temperature Range: Guaranteed to operate over the extended industrial temperature range of -40°C to +85°C.
Applications
- Multimedia, Video, and Audio: Suitable for applications requiring precise control over audio and video signals.
- Communications: Used in communication systems for gain and offset adjustments.
- Mechanical Potentiometer Replacement: Can replace mechanical potentiometers in various applications.
- Instrumentation: Ideal for gain and offset adjustments in instrumentation systems.
- Programmable Voltage Source: Can be used as a programmable voltage source.
- Programmable Current Source: Functions as a programmable current source.
- Line Impedance Matching: Useful for line impedance matching in various circuits.
Q & A
- What is the AD5282BRUZ20-REEL7 used for?
The AD5282BRUZ20-REEL7 is a dual-channel, 256-position, digitally controlled variable resistor used in applications requiring precise digital control over resistance values, such as multimedia, communications, and instrumentation.
- What are the available fixed terminal resistances for the AD5282?
The fixed terminal resistances available are 20 kΩ, 50 kΩ, and 200 kΩ.
- What is the temperature coefficient of the AD5282?
The nominal temperature coefficient is 30 ppm/°C.
- What is the operating temperature range of the AD5282?
The device operates over the extended industrial temperature range of -40°C to +85°C.
- What interface does the AD5282 use for programming?
The AD5282 uses an I2C-compatible, 2-wire serial data interface for programming the VR settings.
- Does the AD5282 have a power-on preset feature?
Yes, the device has an internal power-on preset that places the wiper at midscale during power-on.
- What are the package options for the AD5282?
The AD5282 is available in 14-lead and 16-lead TSSOP packages.
- What is the bandwidth of the AD5282?
The bandwidth is 310 kHz for a 20 kΩ resistance setting.
- Can the AD5282 be used as a programmable voltage source?
Yes, the AD5282 can be used as a programmable voltage source.
- Is the AD5282 suitable for replacing mechanical potentiometers?
Yes, the AD5282 can replace mechanical potentiometers in various applications.
