描述 Description

The MCP446X devices 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 5KΩ, 10KΩ, 50kΩ and 100KΩ. 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.

特性 Features

Quad Resistor Network
Potentiometer or Rheostat configuration options
8-bit: 256 Resistors (257 Taps)
5kΩ
10kΩ
50kΩ
100kΩ
Zero-scale to Full-scale Wiper Operation
Low Wiper Resistance – 75Ω typical
Absolute (Rheostat) – 50 ppm typical (0°-70°C)
Ratiometric (Potentiometer) – 15 ppm typical
Automatic Recall of Saved Wiper Setting
WiperLock? Technology
100 kHz
400 kHz
3.4 MHz
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
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
2.7V to 5.5V - Device Characteristics Specified
1.8V to 5.5V - Device Operation
Wide Bandwidth (-3 dB) Operation – 2 MHz typical for 5.0Ω Device
Extended Temperature Range (-40°C to +125°C)
Package Types: 4x4 QFN-20 and TSSOP-20
AEC-Q100 Grade 1 quarlified

簡(jiǎn)介

MCP4461屬于集成電路（IC）的數(shù)字電位計(jì)。由制造生產(chǎn)的MCP4461數(shù)字電位計(jì)數(shù)字電位器是一系列集成電路器件，可提供類似于傳統(tǒng)機(jī)械電位器或變阻器的可調(diào)節(jié)電阻，但通過(guò)電子信號(hào)而非機(jī)械輸入來(lái)進(jìn)行控制。雖然這些器件的電阻可耗散的電能相對(duì)有限，但其電子控制能力有助于小型化、自動(dòng)化和遠(yuǎn)程控制信號(hào)級(jí)模擬電路，而這些電路本來(lái)可能會(huì)使用機(jī)械電位器。