Features: 2-channel, 256-position
End-to-end resistance: 2.5 k, 10 k, 50 k, and 100 k
Compact MSOP-10 (3 mm * 4.9 mm) package
Fast settling time: tS = 5 s typ on power-up
Full read/write of wiper register
Power-on preset to midscale
Extra package address decode pins AD0 and AD1 (AD5248 only)
Computer software replaces C in factory programming applications
Single supply: 2.7 V to 5.5 V
Low temperature coefficient: 35 ppm/°C
Low power: IDD = 6 A max
Wide operating temperature: −40°C to +125°C
Evaluation board availableApplicationSystems calibrations
Electronics level settings
Mechanical Trimmers® replacement in new designs
Permanent factory PCB setting
Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustmentPinout
Specifications
| # Channels |
2 |
| # Positions |
256 |
| Memory Type |
Volatile |
| Interface |
I2C |
| Resistor Values (kOhms) |
2.5, 10, 50, 100 |
| Voltage Range (V) |
+5.5V |
| Supply Current |
3.5A |
| Temp. Range -40 °C to.. |
125Deg |
| Absolute Tempco (ppm/°C) |
35ppm/C |
| Package |
MSOP |
VDD to GND................................................0.3 V to +7 V
VA, VB, VW to GND.......................................................VDD
Terminal Current, Ax to Bx, Ax to Wx, Bx to Wx1
Pulsed...............................................................±20 mA
Continuous.........................................................±5 mA
Digital Inputs and Output Voltage to GND.........0 V to 7 V
Operating Temperature Range............40°C to +125°C
Maximum Junction Temperature (TJMAX)..................150°C
Storage Temperature...........................65°C to +150°C
Lead Temperature (Soldering, 10 sec).....................300°C
Thermal Resistance2 JA: MSOP-10....................230°C/W
1 Maximum terminal current is bounded by the maximum current handling of the switches, maximum power dissipation of the package, and maximum applied voltage across any two of the A, B, and W terminals at a given resistance.
2 Package power dissipation = (TJMAX − TA)/JA.
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe AD5243 and AD5248 provide a compact 3 mm * 4.9 mm packaged solution for dual 256-position adjustment applica-tions. These devices perform the same electronic adjustment function as a 3-terminal mechanical potentiometer (AD5243) or a 2-terminal variable resistor (AD5248). Available in four different end-to-end resistance values (2.5 k, 10 k, 50 k, and 100 k), these low temperature coefficient devices are ideal for high accuracy and stability variable resistance adjustments. The wiper settings are controllable through the I2C compatible digital interface. The AD5248 has extra package address decode pins AD0 and AD1, allowing multiple parts to share the same I2C 2-wire bus on a PCB. The resistance between the wiper and either endpoint of the fixed resistor varies linearly with respect to the digital code transferred into the RDAC latch.1
Operating from a 2.7 V to 5.5 V power supply and consuming less than 6 A allows for usage in portable battery-operated applications.
For applications that program the AD5243/AD5258 at the factory, Analog Devices offers device programming software running on Windows® NT/2000/XP operating systems. This software effectively replaces any external I2C controllers, which in turn enhances users' systems time-to-market. An AD5243/ AD5248 evaluation kit and software are available. The kit includes a cable and instruction manual.
AD5248 Data Sheet
