Описание
The ADS424x/422x are low-speed variants of the ADS42xx ultralow-power family of dual-channel, 14-bit/12-bit analog-to-digital converters (ADCs). Innovative design techniques are used to achieve high-dynamic performance, while consuming extremely low power with 1.8V supply. This topology makes the ADS424x/422x well-suited for multi-carrier, wide-bandwidth communications applications. The ADS424x/422x have gain options that can be used to improve SFDR performance at lower full-scale input ranges. These devices include a dc offset correction loop that can be used to cancel the ADC offset. Both DDR (double data rate) LVDS and parallel CMOS digital output interfaces are available in a compact QFN-64 PowerPAD package. The devices include internal references while the traditional reference pins and associated decoupling capacitors have been eliminated. All devices are specified over the industrial temperature range (–40°C to +85°C).
CMOS Output:
- 183mW total power at65MSPS
- 277mW total power at 125MSPS
- 332mW total power at 160MSPS
- 88dBc SFDR at 170MHz
- 71.4dBFS SNR at 170MHz
SNR/SFDR Trade-off
- 1.8V parallel CMOS interface
- Double data rate (DDR) LVDS with programmable swing:
- Standard swing: 350mV
- Low swing: 200mV
Down to 200mVPP
