MCP4021

Features:

` Non-volatile Digital Potentiometer in SOT-23, SOIC, MSOP and DFN packages
` 64 Taps: 63 Resistors with Taps to terminal A and terminal B
` Simple Up/Down (U/D) Protocol
` Power-on Recall of Saved Wiper Setting
` Resistance Values: 2.1 k, 5 k, 10 k or 50 k
` Low Tempco:
- Absolute (Rheostat): 50 ppm (0°C to 70°C typ.)
- Ratiometric (Potentiometer): 10 ppm (typ.)
` Low Wiper Resistance: 75 (typ.)
` WiperLock^TM Technology to Secure the wiper setting in non-volatile memory (EEPROM)
` High-Voltage Tolerant Digital Inputs: Up to 12.5V
` Low-Power Operation: 1 A Max Static Current
` Wide Operating Voltage: 2.7V to 5.5V
` Extended Temperature Range: -40°C to +125°C




Application

· Power Supply Trim and Calibration
· Mechanical Potentiometer Replacement in New Designs
· Instrumentation, Offset and Gain Adjust

Pinout






Specifications

Parameter Name	Value
Temp. Range (°C)	-40 to +125
Volatile / Non Volatile	Nonvolatile
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

Absolute Maximum Ratings †
V_DD.................................................................................. 6.5V
CS and U/D inputs w.r.t V_SS............................. -0.3V to 12.5V
A, B and W terminals w.r.t V_SS................ -0.3V to V_DD + 0.3V
Current at Input Pins .................................................±10 mA
Current at Supply Pins ...............................................±10 mA
Current at Potentiometer Pins ...................................±2.5 mA
Storage temperature .................................-65°C to +150°C
Ambient temp. with power applied ............-55°C to +125°C
ESD protection on all pins ........... 4 kV (HBM), 400V (MM)
Maximum Junction Temperature (T_J) . .........................+150°C

† Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

Description

The MCP4021 devices are non-volatile, 6-bit (64 wiper steps) digital potentiometers that are programmed/reprogrammed through a simple up/down serial interface. The MCP4021 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 MCP4021 devices are available with resistor values of 2.5K?, 5K?, 10K? and 50K?. These devices operate from a single 2.7-5.5V supply and draw less than 1 A while operating in the static state.