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OEM Update
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National Semiconductor expands sensor AFE family [Sep 2011]

September 26, 2011 12:21 pm

Seven New 24-bit and 16-bit Pin-Compatible ICs Accelerate Sensor Interface Design
National Semiconductor Corp. introduces seven new 24-bit and 16-bit multi-channel, sensor analog front-ends (AFE) that offer system designers a greater range of choices from high-performance to low-cost options that span channel configurations, current sources, and resolution. National’s LMP900xx sensor AFE integrated circuits (ICs) provide an easy to configure signal path solution for interfacing sensors to microcontrollers. They are targeted at precision sensing systems used to monitor and control temperature, pressure, load, force, motion/position and voltage in industrial, medical, and test and measurement applications.
The pin-compatible LMP900xx sensor AFEs expand on the LMP90100 released earlier this year. They team with National’s WEBENCH Sensor AFE Designer software tool and bench-top development system, enabling design engineers to attach a sensor, configure the signal path, optimize the design, and download configuration data to the sensor AFE for immediate prototyping. Weeks or months of design are reduced to just minutes using National’s integrated hardware/software development system.
System designers can choose from a family of pin-compatible LMP900xx sensor AFEs that meet their specific resolution, channel and current source needs. The LMP900xx family features either a 24-bit or 16-bit sigma-delta ADC with a programmable input (mux) configuration that interfaces up to 4-differential inputs, or 7-single-ended inputs in any combination of input types. The microcontroller interface is supplied through a standard SPI 4-wire serial interface with CRC data link error correction and seven general purpose I/O ports. Each IC is guaranteed over the -40 degrees C to 125 degrees C temperature range.

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