Active quad-channel digital pot for multi-point trimming
The MCP4451-104E/ST is a 4-channel, 257-tap digital potentiometer in a 20-TSSOP surface-mount package, configured as a potentiometer with a linear taper and a total end-to-end resistance of 100 kΩ. Each of the four channels is independently adjustable via the I²C interface; the selectable address feature (three address pins) allows up to eight devices on the same bus, giving 32 total potentiometer channels in a compact footprint.
Industrial temperature range and sourcing posture
Sourced to order against an RFQ; pricing and lead time confirmed at quote time.
Wiper resistance and tolerance — design margin note
The wiper resistance is 75 Ω typical, which sets a floor on the minimum output impedance when the wiper is near the low end of the resistor string.