LTC1274/LTC1277 12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown are low-power, high-performance 12-bit ADCs that operate from a single 5V or ±5V supply and draw only 2mA (typ). They feature a 2µs sample-and-hold, a precision reference, and an internally trimmed clock. The products offer unipolar and bipolar conversion modes, and two power-down modes: Nap mode and Sleep mode.
The LTC1274 and LTC1277 are 12‑bit analog‑to‑digital converters that operate from a single 5 V supply and provide up to 100 ksps sampling. They feature low power dissipation (10 mW) and include sleep and nap power‑down modes for battery‑powered applications. Both devices support unipolar (0‑4.096 V) and bipolar (±2.048 V) input ranges.
The datasheet details pin functions, timing characteristics, absolute maximum ratings, and typical performance graphs. It also describes application areas such as portable systems, high‑speed data acquisition, audio and telecom processing, and spectrum analysis.
| Resolution | 12 bits |
|---|---|
| Maximum Sample Rate | 100 ksps |
| Power Dissipation (typical) | 10 mW |
| Supply Voltage (unipolar) | 4.75‑5.25 V |
| Input Range (unipolar) | 0‑4.096 V |
| Nap Mode Current (LTC1277) | 180 µA |
| Reference Output Voltage | 2.42 V |
Both converters have a 12‑bit resolution.
The devices can sample up to 100 ksps.
When Nap mode is active, the LTC1277 draws approximately 180 µA.