Quad 10μA Supply Current, Low I, Zero-Drift Operational Amplifier

The LTC2066/LTC2067/LTC2068 are single, dual, and quad low power, zero-drift, 100kHz amplifiers. The LTC2066/LTC2067/LTC2068 enable high resolution measurement at extremely low power levels.

Typical supply current is 7.5μA per amplifier with a maximum of 10μA. The available shutdown mode has been optimized to minimize power consumption in duty-cycled applications and features low charge loss during powerup, reducing total system power.

The LTC2066/LTC2067/LTC2068’s self-calibrating circuitry results in very low input offset (5μV max) and offset drift (0.02μV/°C). The maximum input bias current is only 35pA and does not exceed 150pA over the full specified temperature range. The extremely low input bias current of the LTC2066/LTC2067/LTC2068 allows the use of high value power-saving resistors in the feedback network.

With its ultralow quiescent current and outstanding precision, the LTC2066/LTC2067/LTC2068 can serve as a signal chain building block in portable, energy harvesting and wireless sensor applications.

The LTC2066 is available in 6-lead SC70 and 5-lead TSOT-23 packages. The LTC2067 is available in 8-lead MSOP and 10-lead DFN packages. The LTC2068 is available in 14-lead TSSOP and 16-lead 3mm × 3mm QFN packages. These devices are fully specified over the –40°C to 85°C and –40°C to 125°C temperature ranges.

Applications

* Signal Conditioning in Wireless Mesh Networks

* Portable Instrumentation Systems

* Low-Power Sensor Conditioning

* Gas Detection

* Temperature Measurement

* Medical Instrumentation

* Energy Harvesting Applications

* Low Power Current Sensing

* Low Supply Current: 10μA Maximum (per Amplifier)

* Offset Voltage: 5μV Maximum

* Offset Voltage Drift: 0.02μV/°C Maximum

* Input Bias Current:

* 5pA Typical

* 50pA Maximum, –40°C to 85°C

* 150pA Maximum, –40°C to 125°C

* Integrated EMI Filter (90dB Rejection at 1.8GHz)

* Shutdown Current: 170nA Maximum (per Amplifier)