The LTC2249 is a 14-bit 80Msps, low power 3V A/D converter designed for digitizing high frequency, wide dynamic range signals. It is perfect for demanding imaging and communications applications with AC performance that includes 73dB SNR and 90dB SFDR for signals well beyond the Nyquist frequency.
The LTC2249 is a 14‑bit analog‑to‑digital converter that operates at up to 80 Msps from a single 3 V supply (2.7 V‑3.4 V). It delivers low power consumption (222 mW typical) while providing 73 dB SNR and 90 dB SFDR across a wide frequency range, making it suitable for imaging, communications, ultrasound, and portable instrumentation.
The device is supplied in a 32‑lead plastic QFN package (5 mm × 5 mm) with an exposed pad for grounding. The datasheet includes absolute maximum ratings, detailed pin functions, analog and digital input/output specifications, power requirements, timing characteristics, and a list of related parts for alternative or higher‑performance ADCs.
| Sample Rate | 80 Msps |
|---|---|
| Resolution | 14 Bits |
| Power Dissipation (typical) | 222 mW |
| Signal‑to‑Noise Ratio (5 MHz input) | 73 dB |
| Spurious‑Free Dynamic Range (5 MHz input) | 90 dB |
| Analog Supply Voltage | 2.7 V to 3.4 V |
The analog supply voltage operates from 2.7 V to 3.4 V.
Typical power dissipation is 222 mW, with a maximum of 258 mW.