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LT1673 Datasheet(PDF) 1 Page - Linear Technology |
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LT1673 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page 1 LT1672/LT1673/LT1674 APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATION 2 µA Max, AV ≥ 5 Single, Dual and Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps s Gain of 5 Stable s Low Supply Current: 2 µA Max per Amplifier s Rail-to-Rail Input and Output s Low Offset Voltage: 375 µV Max s Over-The-Top TM Inputs Operate Above V+ s Gain Bandwidth Product: 12kHz s Wide Supply Range: 2.2V to 36V s Single Supply Input Range: – 0.3V to 36V s Low Input Bias Current: 250pA s Low Input Offset Current: 20pA s High AVOL: 100V/mV Minimum Driving 100kΩ Load s Output Sources and Sinks 500 µA Load Current s Reverse Battery Protected to 18V The LT ®1672/LT1673/LT1674 are ultralow power (IS ≤ 2µA) decompensated (AV ≥ 5) op amps with preci- sion specifications. The extremely low supply current is combined with excellent amplifier specifications: input offset voltage is 375 µV maximum with a typical drift of only 0.4 µV/°C, input offset current is 100pA maximum. A minimum open-loop gain (AVOL) of 100V/mV ensures that gain errors are small. The devices’ characteristics change little over the supply range of 2.2V to ±15V. Supply rejection is 90dB and the common mode rejection ratio is 90dB. Operation is specified for 3V, 5V and ±15V supplies. Reverse battery protection (–18V min) and inputs that operate above the positive supply make the LT1672/ LT1673/LT1674 easy to use in harsh environments. The low bias currents and offset current of the amplifier permit the use of megohm level source resistors without introducing significant errors. Voltage noise at 4 µVP-P is remarkably low considering the low supply current. For unity gain stable versions of these amplifiers, see the LT1494/LT1495/LT1496. The LT1672 is available in the 8-pin MSOP, PDIP and SO packages. The LT1673 is available in plastic 8-pin PDIP and SO-8 packages with the standard dual op amp pinout. The LT1674 is available in 14-pin PDIP and SO packages. s Battery- or Solar-Powered Systems s Portable Instrumentation s Remote Sensor Amplifier s Micropower Filter s Photodiode Amplifier s High Impedance Circuits Single Supply, 60 µW Precision Instrumentation Amplifier TC VOS Distribution , LTC and LT are registered trademarks of Linear Technology Corporation. 100k* 100k* 5V 5V 1M 0.0047 µF AV = 100 BANDWIDTH = 1kHz CMRR = 65dB AT 120Hz *500V TRANSIENT PROTECTION TOTAL SUPPLY CURRENT = 12 µA + – 1M 1M 100k 100k 1M 1M VOUT 5V LT1389-2.5 1672/3/4 TA01 LT1672 1000pF 110k 110k VIN1 VIN2 – + – + 1/2 LT1673 1/2 LT1673 TC VOS (µV/°C) –1.5 80 70 60 50 40 30 20 10 0 0.9 1672/3/4 TA02 – 0.9 – 0.3 0.3 1.5 120 AMPLIFIERS VS = ±2.5V –40 °C to 85°C Over-The-Top is a trademark of Linear Technology Corporation. |
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