Although these parts were designed to provide the very best speed/power efficiency available in a rail-to-rail amplifier, DC performance is not sacrificed to achieve it. Input offset voltage is specified at 500uV max and open loop gain is 45V/uV. Bias current cancellation is employed to achieve a maximum of 350nA input bias current over most of the input common mode voltage range, allowing these products to be used in many applications with high source resistance such as portable instrumentation and other battery-powered or heat-constrained precision systems.
This LTC6246 family is available in versions fully specified over the commercial (0°C -70°C), industrial (-40°C to 85°C) and high temperature (-40°C to 125°C) ranges. A shutdown feature reduces current consumption to 42uA in the SOT-23 6-lead single and MSOP-10 dual versions. The dual LTC6247 is also available in a tiny 2mm x 2mm x 0.55mm package, as well as the industry-standard MSOP-8 and SOT-23 8-lead packages. The LTC6248 is available in a 16-lead MSOP package. Prices start at $1.39 each for the single, $1.95 each the dual, and $3.07 each for the quad in 1k quantities.
Summary of Features: LTC6246-47-48: Gain Bandwidth Product: 180MHz; –3dB Frequency (AV = 1): 120MHz; Low Quiescent Current: 1mA Max; High Slew Rate: 90V/µs; Rail-to-Rail Inputs & Outputs; Low Broadband Voltage Noise: 4.2nV/vHz; Supply Voltage Range: 2.5V to 5.25V; Input Offset Voltage: 0.5mV Max; Input Bias Current: 100nA; Operating Temperature Range: –40°C to 125°C.
