admin 发表于 2010-4-17 17:45:37

MCP433X/435X Data Sheet

http://www.microchip.com/stellent/images/mchpsiteimages/dwnfolder.gifMCP433X/435X 7/8-Bit Quad SPI Digital POT with Volatile Memory Data Sheet


The MCP433X devices are non-volatile, 7-bit (129 wiper steps) digital potentiometers that are programmed/reprogrammed through an SPI compatible interface. The MCP433X devices offer a variety of configurations simplifying design while minimizing cost, package size and pin count. The MCP433X family of devices are available with resistor values of 5KΩ, 10KΩ, 50k and 100KΩ.

Parameter NameValue
Temp. Range (°C)-40 to +125
Volatile / Non VolatileVolatile
Number of Taps128
Resistance (ohms) K5, 10, 50, 100
# per Package4
INL (Max)1
DNL (Max)0.5
Interface2 SPI

   Features
Quad Resistor Network
Potentiometer or Rheostat Configuration Options
Resistor Network Resolution:
- 7-bit: 128 Resistors (129 Taps)
- 8-bit: 256 Resistors (257 Taps)
RAB Resistances Options of:
- 5k
- 10k
- 50k
- 100k
Zero Scale to Full Scale Wiper Operation
Low Wiper Resistance: 75  (typical)
Low Tempco:
- Absolute (Rheostat): 50 ppm typical (0°C to 70°C)
- Ratiometric (Potentiometer): 15 ppm typical
SPI Serial Interface (10 MHz, Modes 0,0 and 1,1):
- High-Speed Read/Writes to wiper registers
Resistor Network Terminal Disconnect Feature via Terminal Control (TCON) Register
Reset Input Pin
Brown-out Reset Protection (1.5V typical)
Serial Interface Inactive Current (2.5 μA typical)
High-Voltage Tolerant Digital Inputs: Up to 12.5V
Supports Split Rail Applications
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 (-3 dB) Operation:
- 2 MHz (typical) for 5.0 k device
Extended Temperature Range (-40°C to +125°C)


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