LTC1043CSW#PBF

LTC®1043 is a monolithic, charge-balanced, dual switched capacitor instrumentation building block. A pair of switches alternately connects an external capacitor to an input voltage and then connects the charged capacitor across an output port. The internal switches have a break-before-make action. An internal clock is provided and its frequency can be adjusted with an external capacitor. This can also be driven with an external CMOS clock. The LTC1043, when used with low clock frequencies, provides ultra precision DC functions without requiring precise external components. This can also be used for precise V–F and F–V circuits without trimming, and it is also a building block for switched capacitor filters, oscillators and modulators. Typical applications are precision instrumentation amplifiers, ultra precision voltage inverters, multipliers and dividers, V–F and F–V converters, sample-and-hold, switched capacitor filters.

• Instrumentation front end with 120dB CMRR
• Precise, charge-balanced switching
• Internal or external clock, operates up to 5MHz clock rate
• Low power, two independent sections with one clock
• Operates from 3V to 18V
• Power supply current is 0.4mA maximum (pin 16 connected high or low, -40°C ≤ TA ≤ 85°C)
• Internal oscillator frequency is 185KHz typ (COSC (pin 16 to V–)=0pF, -40°C ≤ TA ≤ 85°C)
• 18-lead plastic SO package
• Operating temperature rating range from -40°C to 85°C

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