MCP4461 8-Bit Quad digital potentiometers with NVM and I2C

Microchip’s MCP4461 non-volatile 8-bit digital potentiometers with EEPROM and an I2C compatible interface

The MCP4461 devices from Microchip Technology; are non-volatile, 8-bit (257 wiper steps) digital potentiometers with EEPROM and an I²C compatible interface. The MCP446X family is available with end-to-end resistor values of 5 KΩ, 10 KΩ, 50 kΩ, and 100 KΩ. 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 MCP446X devices offer a variety of configurations simplifying design while minimizing cost, package size, and pin count. The MCP4461 digital potentiometers have a multitude of practical uses in modern electronic circuits. The most popular uses include precision calibration of set point thresholds, sensor trimming, LCD bias trimming, audio attenuation, adjustable power supplies, motor control overcurrent trip setting, adjustable gain amplifiers, and offset trimming. The MCP44XX devices can be used to replace the common mechanical trim pot in applications where the operating and terminal voltages are within CMOS process limitations.

Specifications

• Quad resistor network
  • Potentiometer or rheostat configuration options
  • Resistor network resolution: 8-bit: 256 resistors (257 taps)
• Four RAB resistances options
  • 5 kΩ
  • 10 kΩ
  • 50 kΩ
  • 100 kΩ
• Zero-scale to full-scale wiper operation
• Low wiper resistance: 75 Ω typical
• 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
• I²C compatible serial interface support
  • 100 kHz
  • 400 kHz
  • 3.4 MHz
• Package types: 4 x 4 QFN-20 and TSSOP-20
• AEC-Q100 Grade 1 qualified
• 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 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: 1.5 V typical
• Serial interface inactive current: 2.5 µA typical
• High-voltage tolerant digital inputs up to 12.5 V
• Supports split rail applications
• Wide operating voltage
  • 2.7 V to 5.5 V device characteristics specified
  • 1.8 V to 5.5 V device operation
• Wide bandwidth (-3 dB) operation: 2 MHz typical for 5.0 Ω device
• Extended temperature range (-40°C to +125°C)

more information: https://www.microchip.com/wwwproducts/en/MCP4461

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