ADS4149 - 14-/12-Bit, 160/250MSPS, Ultralow-Power ADC

ADS4149 - Lowest Power 14-Bit, 250 MSPS ADC

The ADS414x/2x are a family of 14-bit/12-bit analog-to-digital converters (ADCs) with sampling rates up to 250MSPS. These devices use innovative design techniques to achieve high dynamic performance, while consuming extremely low power at 1.8 V supply.

The devices are well-suited for multi-carrier, wide bandwidth communications applications. The ADS414x/2x have fine gain options that can be used to improve SFDR performance at lower full-scale input ranges, especially at high input frequencies. They include a dc offset correction loop that can be used to cancel the ADC offset.

At lower sampling rates, the ADC automatically operates at scaled down power with no loss in performance. The ADS414x/2x are available in a compact QFN-48 pacakge and are specified over the industrial temperature range (–40 °C to +85 °C).

Features

Maximum sample rate: 250 MSPS
Ultralow power with 1.8 V single supply:
- 200 mW total power at 160 MSPS
- 265 mW total power at 250 MSPS
High dynamic performance:
- SNR: 71.3 dBFS at 170 MHz
- SFDR: 84 dBc at 170 MHz
Dynamic power scaling with sample rate
Output interface
- Double data rate (DDR) LVDS with programmable swing and strength
- Standard swing: 350 mV
- Low swing: 200 mV
- Default strength: 100 Ω termination
- 2x strength: 50 Ω termination
- 1.8 V parallel CMOS interface also supported
Programmable gain up to 6dB for SNR/SFDR Trade-Off
DC offset correction
Supports low input clock amplitude down to 400 mV_PP
Package: QFN-48 (7 mm × 7 mm)