LTC6943CGN#PBF

Specialized ICS Overview

The LTC6943CGN#PBF is a monolithic, charge-balanced, dual switched capacitor instrumentation building block manufactured by Analog Devices Inc. It operates from a single supply voltage ranging from 5V to 18V and draws a maximum power supply current of 60µA. The device features two independent sections sharing one clock source, with an internal oscillator adjustable via an external capacitor or driven by an external CMOS clock up to 5MHz. Key electrical characteristics include a common-mode rejection ratio (CMRR) of 120dB at DC to 400Hz and on-resistance values between 240Ω and 700Ω depending on supply voltage. It is housed in a 16-lead narrow plastic SSOP package.

Specialized ICS Feature Summary

• Dual precision instrumentation building blocks with 120dB CMRR
• Ultra-low power consumption with IS max 60µA
• Charge-balanced switching for precise DC functions
• Internal oscillator or external CMOS clock input up to 5MHz

Specialized ICS Applications

• Differential voltage to single-ended conversion
• Voltage inversion, multiplication, and division
• Precision instrumentation amplifiers
• Voltage-to-frequency and frequency-to-voltage converters

Specialized ICS Procurement Notes

Verify the specific suffix GN indicates the commercial temperature range (0°C to 70°C) as defined in the datasheet ordering information. Ensure the package matches the 16-SSOP physical dimensions provided in the package description section. Confirm RoHS compliance status through official manufacturer documentation prior to integration.

Specialized ICS Selection Notes

Select this component when high common-mode rejection is required for low-frequency signals. The internal oscillator frequency must be set using an external capacitor on Pin 14 if precise timing control is needed. For applications requiring operation outside the 0°C to 70°C range, consider the IGN or HGN variants which cover extended industrial and military temperatures respectively.

Specialized ICS Part Context

The LTC6943 is functionally compatible with the LTC1043 but offers improved performance characteristics. It utilizes Linear Technology’s enhanced LTCMOS silicon gate process. The CGN variant specifically denotes the commercial grade version guaranteed for operation within the 0°C to 70°C temperature range, distinct from the wider ranges offered by other suffixes.

Specialized ICS Replacement Considerations

The LTC1043 is listed as a functionally compatible alternative in the datasheet. Verify pin compatibility and ensure the replacement meets the specific CMRR and leakage current requirements of the original design.