MCP45/46XX DataSheet

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  7/8-Bit Single/Dual I2C Digital POT with Volatile Memory


The MCP45XX devices offer a wide range of product offerings using an I2C™Compatible interface. This family of devices support a 7-bit resistor network, Non-Volatile memory configurations, and Potentiometer and Rheostat pinouts. WiperLock Technology allows application-specific calibration settings to be secured in the EEPROM.

Parameter Name  Value
Temp. Range (°C)  -40 to +125
Volatile / Non Volatile  Volatile
Number of Taps  128
Resistance (ohms) K  5, 10, 50, 100
# per Package  1
INL (Max)  0.5
DNL (Max)  0.25
Interface  I²C™

     Features
Single or Dual Resistor Network options
Potentiometer or Rheostat configuration options
Resistor Network Resolution
       -  7-bit: 128 Resistors (129 Steps)
RAB Resistances options of:
       -  5kΩ
       -  10kΩ
       -  50kΩ
       -  100 kΩ
Zero-Scale to Full-Scale Wiper operation
Low Wiper Resistance: 75Ω (typ.)
Low Tempco:
       -  Absolute (Rheostat): 50 ppm typical(0°C to 70°C)
  - Ratiometric (Potentiometer): 15 ppm typical
Non-volatile Memory
       -  Automatic Recall of Saved Wiper Setting
       -  WiperLock™ Technology
       -  10 General Purpose Memory Locations
I2C™Compatible Serial interface
       -  (100 kHz, 400 kHz and 3.4 MHz support)
       -  Internal weak pull-up on SDA and SCL pins
Serial protocol allows:
       -  High-Speed Read/Write to wiper
       -  Read/Write to EEPROM
       -  Write Protect to be enabled/disabled
       -  WiperLock to be enabled/disabled
Resistor Network Terminal Disconnect Feature via the    Terminal Control (TCON) Register
Write Protect Feature:
       -  Hardware Write Protect (WP) Control pin
       -  Software Write Protect (WP) Configuration bit
Brown-out reset protection (1.5V typical)
Serial Interface Inactive current (2.5 uA typ.)
High-Voltage Tolerant Digital Inputs: Up to 12.5V
Internal weak pull-up on all digital inputs
Wide Operating Voltage:
       -  2.7V to 5.5V - Device Characteristics Specified
       -  1.8V to 5.5V - Device Operation
Wide Bandwidth (-3dB) Operation:
       -  2 MHz (typ.) for 5.0 kΩ device
Extended temperature range (-40°C to +125°C)


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