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Op-amps deliver 100µV input offset over 0°C to 85°C

Posted: 09 May 2007     Print Version  Bookmark and Share

Keywords:high precision op-amps  high-open loop gain  input offset voltage 

STMicroelectronics (ST) has released TS507, a high-precision op-amp that benefits customers with an ultra-low input offset voltage guaranteed over a wide common-mode voltage range. The competitive cost of the device makes it a suitable solution for automotive and industrial applications.

An ST patented trimming technique adjusts the input offset voltage of the TS507 at 100µV maximum. This digital method is done after packaging and has the advantage of reducing the device's overall cost by avoiding the use of external components.

In addition, the TS507 offers a good precision over the full temperature range through a low input offset voltage drift (250µV maximum over the range of 0°C to 85°C). In addition to these precision parameters, the TS507 features electrical characteristics such as a high open-loop gain (131dB typical at 5V) and a high CMRR (115dB typical at 5V).

Other major benefits of the TS507 include low noise and a high output current of up to 120mA in a short-circuit configuration. Internal electrostatic-discharge protection is also extended to 5kV, for the human body model, to minimise handling and fabrication risks.

Among the designs that would benefit by using the TS507 are applications requiring high precision such as signal conditioning in resistor bridges, sensors, medical and industrial instrumentation. The TS507 is also automotive-grade qualified over the full temperature range of -40°C to 125°C.

In production now, part numbers TS507ID-TS507IDT (industrial range of -40°C to 125°C) and TS507CD-TS507CDT (commercial range of 0°C to 85°C) are available in a SO8 ECOPACK package and cost Rs.2,536.19 (60 cents) and Rs.2,113.49 (50 cents), respectively in quantities of 1,000 pieces. Part numbers TS507ILT and TS507CLT come in the space-saving SOT23-5 ECOPACK package and cost Rs.2,536.19 and Rs.2,113.49, respectively.

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