Texas Instruments introduced a fully-differential amplifier for driving high-speed analog-to-digital converters up to 100 MHz. The 9GHz THS4509 is for use in demanding applications such as test and measurement, medical imaging, wireless infrastructure and industrial. Leveraging TI's BiCom-III complementary bipolar Silicon-Germanium (SiGe) process, the THS4509 delivers an input referred voltage noise of 2.0 nV/rtHz, second- and third-order harmonic distortion at 70 MHz of -80 dBc and -87 dBc (2 Vpp into 200 ohm load), respectively, and 1% settling time of 2 ns with 2-V output step. When driving the ADS5500 14-bit ADC at 125 MSPS (mega samples per second) and 70-MHz input frequency, the THS4509 and ADS5500 system achieves unprecedented levels of performance – says TI. The single-tone spurious-free dynamic range (SFDR) is 81 dBc, the two-tone SFDR with 5-MHz tone spacing is 89 dBc and the signal-to-noise ratio (SNR) is 70.1 dBFS. Additional features of the THS4509 include large signal bandwidth (2 Vpp) of 1.5 GHz, small signal bandwidth of 1.9 GHz (<1 Vpp), slew rate of 6600 V/us and 0.65 mA power-down mode. The THS4509 is well-suited for driving other high-performance ADCs, including the new ADS5424 14-bit, 105-MSPS ADC. The THS4509 joins TI´s portfolio of high-speed amplifiers, such as the OPA695 1.4-GHz current feedback and THS4304 3-GHz voltage feedback operational amplifiers, designed to drive the latest data converters to their optimal performance. The THS4509 is sampling now, with volume production scheduled for 1Q 2005. The device is available in a 16-pin quad flat no-lead (QFN) package, priced at $3.75 in 1,000-unit quantities. An evaluation module (EVM) is also available.