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Figure 2. AD5242 Functional Block Diagram The AD5241/AD52421 provide a single-/dual-channel, 256-position, digitally controlled variable resistor (VR) device. These devices perform the same electronic adjustment function as a potentiometer, trimmer, or variable resistor. Each VR offers a completely programmable value of resistance between the A terminal an.
► 256 positions
► 10 kΩ, 100 kΩ, 1 MΩ
► Low temperature coefficient: 30 ppm/°C
► Internal power on midscale preset
► Single-supply 2.7 V to 5.5 V or dual-supply ±2.7 V for ac or
bipolar operation
► I2C-compatible interface with readback capability
► Extra programmable logic outputs
► Self contained shutdown feature
► Extended temperature range: −40°C to +105°C
APPLICATIONS
► Multimedia, video, and audio
► Communications
► Mechanical potentiometer replacement
► Instrumentation: gain, offset adjustment
► Programmable voltage-to-current conversion
► Line impedance matching
FUNCTIONAL BLOCK DIAGR.
| No. | Partie # | Fabricant | Description | Fiche Technique |
|---|---|---|---|---|
| 1 | AD524 |
Analog Devices |
Precision Instrumentation Amplifier |
|
| 2 | AD5240 |
Analog Devices |
FAST/ COMPLETE 12-BIT A/D CONVERTERS |
|
| 3 | AD5242 |
Analog Devices |
256-Position Digital Potentiometers |
|
| 4 | AD5243 |
Analog Devices |
Dual 256-Position I2C Compatible Digital Potentiometer |
|
| 5 | AD5245 |
Analog Devices |
256-Position I2C-Compatible Digital Potentiometer |
|
| 6 | AD5246 |
Analog Devices |
128-Position I2C-Compatible Digital Resistor |
|
| 7 | AD5247 |
Analog Devices |
128-Position I2C-Compatible Digital Potentiometer |
|
| 8 | AD5248 |
Analog Devices |
Dual 256-Position I2C Compatible Digital Potentiometer |
|
| 9 | AD5200 |
Analog Devices |
256-Position and 33-Position Digital Potentiometers |
|
| 10 | AD5201 |
Analog Devices |
256-Position and 33-Position Digital Potentiometers |
|
| 11 | AD5203 |
Analog Devices |
4-Channel/ 64-Position Digital Potentiometer |
|
| 12 | AD5204 |
Analog Devices |
4-Channel Digital Potentiometers |
|