Milpitas, Calif. − Linear Technology has introduced the LTC2057HV, a zero-drift operational amplifier with self-calibrating circuitry that provides high DC precision and stability over changes in temperature, time, input range and supply voltage. For purchasers who buy components for high precision products, the LTC2057HV op amp is suitable for applications such as high resolution data acquisition, reference buffering, test & measurement, electronic scales, thermocouple amplifiers, strain gauges, low-side current sense, and automotive monitors and control.
With 5-µV input offset voltage, 0.025-µV/°C offset drift and 220nVP-P low frequency noise with no 1/f noise, the LTC2057HV op amp offers more than 140-dB dynamic range while operating on a 60V (±30V) supply. This wide dynamic range enables tiny signals to be amplified in the presence of much larger signals without saturating the amplifier or losing precision, said Linear. A lower supply part is available for applications that require supply voltages up to 36V.
The LTC2057 op amp is specified for 30-V supply operation while the LTC2057HV can operate on supplies up to 60V. Both versions also work on 4.75-V supplies and are fully specified over -40°C to 85°C and -40°C to 125°C temperature ranges. These devices offer low voltage noise, low current noise and low input bias current, while the zero-drift architecture cancels 1/f noise.
Spurious artifacts normally associated with zero-drift amplifiers are suppressed, said Linear, which extends the dynamic range, stability and useful signal bandwidth. The input common-mode range includes the negative rail and the output swings rail-to-rail, which makes the LTC2057 suitable for single- and dual-supply industrial, instrumentation and automotive applications, according to the company.
The LTC2057 op amp is available in 3- x 3-mm DFN, MSOP-8 and SOIC-8 packages. It's also available in a MSOP-10 package with a pinout that enables a guard ring to be easily routed around the input to preserve the high precision and low noise performance at high source impedance.