TI 5962-9080902MCA

The TLE206x series low-power JFET-input operational amplifiers double the bandwidth of the earlier TLOGx and TL03x BiFET families without significantly increasing power consumption. Texas Instruments' Excalibur process also provides a lower noise floor than the TLOGx and TL03x. On-chip zener-trimmed offset voltage delivers precision-grade performance for DC-coupled applications. The TLE206x devices are pin-compatible with other Texas Instruments BiFET op amps; they can be used to double the bandwidth of TL06x and TL03x circuits, or to reduce the power consumption of TL05x, TL07x, and TLO8x circuits by nearly 90%.

BiFET op amps offer the inherently high input impedance of JFET input transistors without sacrificing the output drive capability associated with bipolar amplifiers. This makes them better suited for interfacing with high-impedance sensors or low-level AC signals. They also provide superior AC response characteristics compared to bipolar or CMOS devices with similar power consumption. The TLE206x family features a high-output-drive circuit capable of driving 100-Ω loads at ±5 V supply. This makes them particularly well suited for driving transformer loads in modems and other applications requiring good AC characteristics, low power consumption, and high output drive.

Since BiFET op amps are designed for dual-supply operation, care must be taken regarding common-mode input voltage limits and output swing when operating from a single supply. The input signal must be DC-biased, and the load should be terminated to a virtual ground node at the midpoint of the supply. In this case, Texas Instruments' TLE2426 integrated virtual ground generator is particularly useful.

The TLE206x is fully specified for ±15 V and ±5 V operating conditions. For low-voltage and/or single-supply system operation, Texas Instruments' LinCMOS series op amps (with TLC- and TLV- prefixes) are recommended. When transitioning from BiFET to CMOS amplifiers, special attention should be paid to slew rate and bandwidth requirements as well as output load conditions. Texas Instruments' TLV2432 and TLV2442 CMOS op amps are excellent choices.