dc1333a-c DC1333A-C Demonstration circuit 1333A features the LTC2640, a 12-bit SPI DAC. This device establishes a new benchmark for size and integration of 12-bit DACs and onboard reference. DC1333A-C LTC2640-HM12 Demo Board | 12-Bit SPI DAC (4.096V ref, Reset to Mid-Scale) (requires DC2026)