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Part Number: AD5235
Description: The AD5235 provides a dual channel, digitally controlled variable resistor (VR) with resolutions of 1024 position...
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AD5235
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DataSheet
General Description
AD5235 General Description
The AD5235 provides a dual channel, digitally controlled variable resistor (VR) with resolutions of 1024 positions. These devices perform the same electronic adjustment function as a potentiometer or variable resistor. The AD5235's versatile programming via a Micro Controller allows multiple modes of operation and adjustment.
In the direct program mode a predetermined setting of the RDAC register can be loaded directly from the micro controller. Another key mode of operation allows the RDAC register to be refreshed with the setting previously stored in the EEMEM register. When changes are made to the RDAC register to establish a new wiper position, the value of the setting can be saved into the EEMEM by executing an EEMEM save operation. Once the settings are saved in the EEMEM register, these values will be transferred automatically to the RDAC register to set the wiper position at system power ON. Such operation is enabled by the internal preset strobe and the preset can also be accessed externally.
An internal scratch pad RDAC register can be programmed by the micro controller to set the resistance between terminals W-and-B. Once the target value is achieved, the RDAC content register can be placed in the non-volatile memory for automatic recall during Power Up. The AD5235 is available in the thin TSSOP-16 package. All parts are guaranteed to operate over the extended industrial temperature range of -40°C to +85°C.
AD5235 Maximum Ratings
Absolute Maximum Rating (TA = +25°C, unless otherwise noted)
VDD to GND.............................................................. -0.3, +7V
VSS to GND................................................................. 0V, -7V
VDD to VSS .........................................................................+7V
VA, VB, VW to GND ................................................. VSS, VDD
AX BX, AX WX, BX WX ...................................... ±20mA
Ox to GND................................................................... 0V, VDD
Digital Inputs & Output Voltage to GND .................. 0V, +7V
Operating Temperature Range........................ -40°C to +85°C
Maximum Junction Temperature (TJ MAX)................... +150°C
Storage Temperature ....................................-65°C to +150°C
Lead Temperature (Soldering, 10 sec)..........................+300°C
Thermal Resistance JA,TSSOP-16..............................180°C/W
Package Power Dissipation = (TJMAX - TA) / JA
VDD to GND.............................................................. -0.3, +7V
VSS to GND................................................................. 0V, -7V
VDD to VSS .........................................................................+7V
VA, VB, VW to GND ................................................. VSS, VDD
AX BX, AX WX, BX WX ...................................... ±20mA
Ox to GND................................................................... 0V, VDD
Digital Inputs & Output Voltage to GND .................. 0V, +7V
Operating Temperature Range........................ -40°C to +85°C
Maximum Junction Temperature (TJ MAX)................... +150°C
Storage Temperature ....................................-65°C to +150°C
Lead Temperature (Soldering, 10 sec)..........................+300°C
Thermal Resistance JA,TSSOP-16..............................180°C/W
Package Power Dissipation = (TJMAX - TA) / JA
AD5235 Features
Dual, 1024 Position Resolution
25K, 250K Ohm Terminal Resistance with 50ppm/°C Tempco
Nonvolatile Memory Preset
SPI Compatible Serial Data Input with Readback Function
Increment/Decrement Commands, Push Button Command
+3 to +5V Single Supply Operation
±2.5V Dual Supply Operation
30 bytes of general purpose nonvolatile memory
25K, 250K Ohm Terminal Resistance with 50ppm/°C Tempco
Nonvolatile Memory Preset
SPI Compatible Serial Data Input with Readback Function
Increment/Decrement Commands, Push Button Command
+3 to +5V Single Supply Operation
±2.5V Dual Supply Operation
30 bytes of general purpose nonvolatile memory
AD5235 Typical Application
Mechanical Potentiometer Replacement
Instrumentation: Gain, Offset Adjustment
Programmable Voltage to Current Conversion
Programmable Filters, Delays, Time Constants
Line Impedance Matching
Power Supply Adjustment
DIP Switch Setting
Instrumentation: Gain, Offset Adjustment
Programmable Voltage to Current Conversion
Programmable Filters, Delays, Time Constants
Line Impedance Matching
Power Supply Adjustment
DIP Switch Setting
AD5235 Connection Diagram
AD5235
PDF/DataSheet Download
- Datasheet: AD5235
- File Size: 275275 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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