TI: high-voltage amplifiers enable accuracy in error-sensitive industrial applications

Texas Instruments introduced three new amplifiers with a unique combination of high speed and high precision, allowing designers to create more accurate circuits for error-sensitive applications. The new devices support more precise measurement and faster processing of a wide variety of input signals in test and measurement, medical, and data-acquisition systems. To learn more about TI’s new amplifiers, with maximum supply voltages ranging from 27 to 36 V.

Designers can select the amplifier architecture that meets their system requirements, with input voltages, bandwidths and key features as follows:

  • OPA2810: 27-V junction gate field-effect transistor (JFET)-input dual operational amplifier (op amp), 120-MHz bandwidth, 500-µV max offset voltage.
  • OPA189: 36-V zero-drift op amp, 14-MHz bandwidth, multiplexer (MUX) friendly.
  • THS3491: 32-V current-feedback amplifier, 900-MHz small-signal bandwidth, ±420-mA output current.

The high bandwidths of the OPA2810 and OPA189 enable high-gain configurations and faster response times for more accurate measurements. Designers can use the THS3491 current-feedback amplifier’s wide small-signal bandwidth, high slew rate and output current of ±420 mA to achieve low distortion and high output power levels. The THS3491 is capable of 10-Vpeak-to-peak output levels at 200 MHz into 100-Ω loads for test and measurement systems, such as arbitrary waveform generators, laser diode drivers and high capacitive load drive applications.

The exceptional precision of these high-voltage amplifiers maximizes system accuracy, while reducing the need for external calibration and minimizing bill-of-materials cost. With an industry-leading maximum offset and lowest voltage noise of 5.7 nV/√Hz for 27-V amplifiers in the 100- to 200-MHz bandwidth range, the OPA2810 op amp allows engineers to achieve more precise measurements in data-acquisition and signal-processing applications.

The OPA189 is the widest bandwidth zero-drift op amp with the lowest noise of 5.2 nV/√Hz. With a low maximum drift of 0.02 μV/°C, the OPA189 also minimizes temperature error without calibration, increasing system accuracy over an extended temperature range.

Consuming up to 80 percent less power than competitive devices, TI’s new amplifiers enable low-power operation in high-speed designs. Engineers can jump-start the design of their high-voltage systems with the Reference Design Maximizing Signal Dynamic Range for True 10 Vpp Differential Input to 20-Bit ADC.

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