DALLAS--Texas Instruments Inc. today introduced a new series of fully differential operational amplifiers that TI says reduces component count and simplifies how engineers optimize performance of analog-to-digital converters. One of the fully differential op amps can replace three other operational amplifiers, according to the Dallas company.
"Without a fully differential op amp, the designer has to have a lot of analog design experience to interface single-ended amplifiers with a high-speed, high-resolution ADC," said Gary Reichmuth, strategic marketing manager for precision analog products at TI. "This new family of amplifiers provides a truly differential signal path from input to output. As a result, the quality of the signal is superior, and that's very important in high-speed communications applications where low bit error rates are a must," he added.
TI said the THS41xx series has fully differential outputs that effectively block most of the common-mode noise and give the op amps low total harmonic distortion (THD). The best THD in the series is -83 dB at 1 megahertz, according to TI. These devices have a power supply range from 5 to + 15 volts.
The series is fabricated with TI's BiCom-I complementary bipolar process technology. The chips are housed in an 8-pin small outline IC (SOIC) package or in TI's PowerPad MSOP for enhanced thermal management. In quantities of 1,000, the op amps are priced in a range of $3.25 to $3.35 each.
