Eight channels, 8 bits, I²C — what this DAC brings to the board
The LTC2637IMS-LMX8#PBF from Analog Devices packs eight independent 8-bit voltage-output DACs into a 16-MSOP package, communicating over a single I²C bus. That is eight trim voltages or bias levels from a part that fits in the footprint of a small op-amp — useful for multi-channel calibration, VCO tuning, or setting thresholds across a mixed-signal board. Each channel settles in 3.5 µs typical. Integral nonlinearity is ±0.05 LSB maximum, and differential nonlinearity is ±0.5 LSB maximum — tight numbers that guarantee monotonicity and keep the transfer function within a fraction of an LSB across the full 8-bit range.
Reference flexibility: internal or external
The part accepts either the internal reference or an external reference applied to the REF pin. Using the internal reference saves a component and board area; switching to an external reference lets you tie the full-scale voltage to a system-level precision reference, which can improve drift and absolute accuracy across temperature.
The 16-MSOP package is surface-mount, suitable for reflow assembly on standard FR4.