MCP4021/2/3/4 DataSheet

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  Low-Cost NV Digital POT w/WiperLock Technology


The MCP402X devices are non-volatile, 6-bit (64 wiper steps) digital potentiometers that are programmed/reprogrammed through a simple up/down serial interface. The MCP402X devices offer a variety of configurations simplifying design while minimizing cost, package size and pin count. The MCP4021 device offers a voltage divider (potentiometer), with all terminals available on pins. The MCP4022 is a true rheostat, with both nodes of the resistor available on pins. The MCP4023 device offers a voltage divider (potentiometer), with one terminal connected to ground. The MCP4024 device is a rheostat mode device, with one terminal of the resistor connected to ground. The devices offer WiperLock™ Technology which allows the user unlimited reprogramming and locking of the wiper setting. This is useful for equipment that requires factory trimming or recalibration. The MCP402x family of devices are available with resistor values of 2.5KΩ, 5KΩ, 10KΩ and 50KΩ. These devices operate from a single 2.7-5.5V supply and draw less than 1 µA while operating in the static state.
Parameter Name  Value
Temp. Range (°C)  -40 to +125
Volatile / Non Volatile  Non Volatile(EEPROM)
Number of Taps  64
Resistance (ohms) K  10,2.1,5,50
# per Package  1
INL (Max)  0.5
DNL (Max)  0.5
Interface  Up / Down Protocol

     Features
Nonvolatile Digital Potentiometer in SOT-23 packages
64 Taps: 63 Resistors with Taps to VSS and VDD
Simple Up/Down (U/D) Protocol
Automatic Recall of Potentiometer Wiper Settings
Resistance Values: 2kΩ, 5kΩ, 10kΩ, 50kΩ
Low Tempco:
- Absolute (Rheostat): <100 ppm (typ.)
- Ratiometric (Potentiometer): <10 ppm (typ.)
Low Wiper Resistance: 100Ω (typ.)
WiperLock™ Technology to Secure the EEPROM
Low-Power Operation: 1μA Max Static Current
Wide Operating Voltage: 2.7V to 5.5V
Extended Temperature Range: -40°C to +125°C
Also consider: MCP4022, MCP4023, MCP4024

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