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. The supply range spans 2.7 V to 5.5 V on both analog and digital rails. 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.
Temperature grade and operating environment
Rated for -40°C to 85°C, the LTC2637IMS-LMX8#PBF covers industrial control, telecom infrastructure, and outdoor equipment. The 16-MSOP package is surface-mount, suitable for reflow assembly on standard FR4.
Lifecycle and compliance
The part carries an active lifecycle status — no last-time-buy or NRND flags — and is ROHS3 compliant. That means it remains a current-production choice for new designs and ongoing production, with no imminent obsolescence risk.