14-bit A/D Converter from ADI Reduces Power and Size in Comms, Instrumentation & T&M Applications

The new converter meets the performance and size requirements of the latest 3G and 4G multi-standard cellular infrastructure equipment, such as CDMA2000, WB-CDMA, LTE, TD-SCDMA and multi-carrier GSM. Other key applications include battery-powered, hand-held instruments, scopes and portable medical devices.



The dual AD9645 A/D converter consumes only 122 mW/channel at 125 MSPS and features excellent SFDR performance of 91 dBc at 70 MHz. With an IF sampling range of up to of 200 MHz, the device is designed for use in multi-mode digital receiver architectures. A pin-compatible dual 12-bit version, the AD9635, is also available, enabling an easy migration path between 12-bit and 14-bit converters with sampling rates from 20 MSPS to 125 MSPS.



The AD9645 dual A/D converter features a multi-stage, differential pipelined architecture with integrated output-error-correction logic. The AD9645 is available in a 32-lead RoHS-compliant LFCSP and is specified over the industrial temperature range of –40°C to +85°C. The dual A/D converter features a space-saving serial 1.8-V LVDS digital output with two lanes per channel.



AD9645 14-bit High-speed A/D Converter Key Features:

• SNR = 74.3 dBFS at fIN up to Nyquist input frequency; 125 MSPS sampling rate

• ENOB of 12 at fIN up to Nyquist input frequency

• SFDR = 91 dBc at fIN = 70 MHz

• Excellent DC linearity:

o DNL = ±0.65 LSB typical

o INL = ±1.5 LSB typical



Both products are available now for sampling and full production with the AD9645 starting at 27.99 (USD) and the AD9635 from 18.69 (USD) in 1,000 quantities.