Product Description
7-Bit Quad I2C Digital POT with Nonvolatile MemoryMCP444XDescriptionThe MCP444X devices are non-volatile, 7-bit (129 wiper steps) digital potentiometers with EEPROM and an I2C compatible interface.
The MCP444X family is available with end-to-end resistor values of 5KO, 10KO, 50kO and 100KO.
These devices offer WiperLock™ Technology which allows the user unlimited reprogramming and locking of the wiper setting.
It is useful for equipment that requires factory trimming or recalibration.
The MCP444X devices offer a variety of configurations simplifying design while minimizing cost, package size and pin count.
Features• Quad Resistor Network• Potentiometer or Rheostat configuration options• Resistor Network Resolution - 7-bit: 128 Resistors (129 Taps)• RAB Resistances options of: - 5kO, - 10kO, - 50kO, - 100kO• Zero Scale to Full Scale Wiper operation• Low Wiper Resistance: 75 O (typical)• Low Tempco:- Absolute (Rheostat): 50 ppm typical (0°C to 70°C)- Ratiometric (Potentiometer): 15 ppm typical• Nonvolatile Memory- Automatic Recall of Saved Wiper Setting- WiperLock™ Technology- 5 General Purpose Memory Locations• I2C Serial Interface : - 100 kHz, 400 kHz, and 3.4 MHz support• Serial protocol allows:- High-Speed Read/Write to wiper- Read/Write to EEPROM- Write Protect to be enabled/disable- WiperLock to be enabled/disabled• Resistor Network Terminal Disconnect Feature via Terminal Control (TCON) Register• Reset input pin• 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 typical)• High-Voltage Tolerant Digital Inputs: Up to 12.
5V• Supports Split Rail Applications• Internal weak pull-up on all digital inputs (except SCL and SDA)• Wide Operating Voltage:- 2.
7V to 5.
5V - Device Characteristics Specified- 1.
8V to 5.
5V - Device Operation• Wide Bandwidth (-3 dB) Operation: - 2 MHz (typical) for 5.0 kO device• Extended temperature range (-40°C to +125°C)• Package Types: 4x4 QFN-20, TSSOP-20 and TSSOP-14
