Features: `Nonvolatile memory maintains wiper settings
`64-position
`Compact MSOP-10 (3 mm * 4.9 mm) package
`I2C®-compatible interface
`VLOGIC pin provides increased interface flexibility
`End-to-end resistance 1 k, 10 k, 50 k, 100 k
`Resistance tolerance stored in EEPROM (0.1% accuracy)
`Power-on EEPROM refresh time <1 ms
`Software write protect command
`Three-state Address Decode Pins AD0 and AD1 allow 9 packages per bus
`100-year typical data retention at 55°C
`Wide operating temperature −40°C to +85°C
`3 V to 5 V single supplyApplication·LCD panel VCOM adjustment
·LCD panel brightness and contrast control
·Mechanical potentiometer replacement in new designs
·Programmable power supplies
·RF amplifier biasing
·Automotive electronics adjustment
·Gain control and offset adjustment
·Fiber to the home systems
·Electronics level settingsPinout
SpecificationsVDD to GND...................................−0.3 V to +7 V
VA, VB, VW to GND........GND − 0.3 V, VDD + 0.3 V
IMAX
Pulsed1................................................±20 mA
Continuous...............................................±5 mA
Digital Inputs and Output Voltage to GND...0 V to +7 V
Operating Temperature Range.........−40°C to +85°C
Maximum Junction Temperature (TJMAX)............150°C
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.
Storage Temperature.....................−65°C to +150°C
Lead Temperature (Soldering, 10 sec)..............300°C
Thermal Resistance2 JA: MSOP − 10...........200°C/W
| # Channels |
1 |
| # Positions |
64 |
| Memory Type |
Non-Volatile |
| Interface |
I2C |
| Resistor Values (kOhms) |
1, 10, 50, 100 |
| Voltage Range (V) |
+5.5V |
| Supply Current |
4A |
| Temp. Range -40 °C to.. |
85Deg |
| Absolute Tempco (ppm/°C) |
300ppm/C |
| Package |
MSOP |
DescriptionThe AD5258 provides a compact, nonvolatile 3 mm × 4.9 mm packaged solution for 64-position adjustment applications. These devices perform the same electronic adjustment function as mechanical potentiometers1 or variable resistors, but with enhanced resolution and solid-state reliability.
The wiper settings are controllable through an I2C-compatible digital interface that is also used to read back the wiper register and EEPROM content. Resistor tolerance is also stored within EEPROM providing an end-to-end tolerance accuracy of 0.1%. There is also a software write protection function that ensures data cannot be written to the EEPROM register.
A separate VLOGIC pin delivers increased interface flexibility. For users who need multiple parts on one bus, Address Bit AD0 and Address Bit AD1 allow up to nine devices on the same bus.
AD5258 Data Sheet
