LTC2991 Development Board

A simple printed circuit board that makes it easy to plug the surface-mount (MSOP-16) LTC2991 into a common breadboard.

A fully-assembled LTC2991 breakout board, ready for service.

Features

• A pair of pin headers for each of the LTC2991's address lines. Jumpering the pins on any given address line connects that line to ground.
• Pads suitable for a current-sensing shunt resistor (1206 SMD), connected across the V1 and V2 terminals of the LTC2991, and pads for a 1x2 pin header to connect said shunt to the outside world.
• Pads suitable for a temperature-sensing, diode-connected NPN BJT (SOT-23 SMD), connected across the V3 and V4 terminals of the LTC2991, and a filter capactitor for said transistor.

Carrier board schematic. A PDF copy is in the build/ subdirectory.

Caveats

There seems to be no such thing as a breadboard standard. This PCB was designed to work with an R.S.R.-branded breadboard. It features a 0.100" pin pitch, and an approx. 0.300" gap down the middle of the board.

Changelog

Rev. A

Initial design.

Rev. B

• Added two-pin header for measurement of external current source via on-board shunt resistor (both optional).
• Added filter capacitor for IC power.
• Added filter capacitor for temperature-sensing transistor (both optional).
• Placed noise-shielding traces around temperature-sensing transistor.