USA - Analog Devices (www.analog.com) introduced a two-channel, high-performance 14-bit, 125-MSPS A/D converter that reduces total power consumption by 22 percent over competing solutions. In addition to delivering high speed and wide dynamic range at lower power, the cost-effective and functionally flexible AD9645 A/D converter is available in a 5-mm × 5-mm package, which represents a 30 percent space savings over the nearest competitor. 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 (mega samples per second) and features excellent SFDR (spurious-free dynamic range) 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:
-DNL = ±0.65 LSB typical
-INL = ±1.5 LSB typical

Pricing, Availability, and Complementary Products

Recommended Driver Amplifiers for the AD9645
For differential RF/IF inputs, the ultra low distortion ADL5562 diff amplifier
For DC-coupled inputs, the ADA4927-2 or the ADA4938-2 A/D converter drivers

Recommended Clock Drivers for the AD9645
For low jitter performance, the AD9510, AD9511, AD9512, AD9513, AD9514, AD9515, family of clock distribution solutions
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