The AD7747 is a high-resolution, ?-? capacitance-to-digital converter (CDC). The capacitance to be measured is connected directly to the device inputs. The architecture features inherent high resolution (24-bit no missing codes, up to 19.5-bit effective resolution), high linearity (?0.01%), and high accuracy (?10 fF factory calibrated). The AD7747 capacitance input range is ?8 pF (changing), and it can accept up to 17 pF common-mode capacitance (not changing), which can be balanced by a programmable on-chip digital-to-capacitance converter (CAPDAC).The AD7747 is designed for single-ended or differential capacitive sensors with one plate connected to ground. For floating (not grounded) capacitive sensors, the AD7745 or AD7746 are recommended.The part has an on-chip temperature sensor with a resolution of 0.1?C and accuracy of ?2?C. The on-chip voltage reference and the on-chip clock generator eliminate the need for any external components in capacitive sensor applications. The part has a standard voltage input that, together with the differential reference input, allows easy interface to an external temperature sensor, such as an RTD, thermistor, or diode.The AD7747 has a 2-wire, I2C-compatible serial interface. The part can operate with a single power supply of 2.7 V to 5.25 V. It is specified over the automotive temperature range of ?40?C to +125?C and is housed in a 16-lead TSSOP package.ApplicationsAutomotive, industrial, and medical systems for:Pressure measurementPosition sensingProximity sensingLevel sensingFlowmetersImpurity detections
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Part number: EVAL-AD7747EBZ
More details from Analog Devices Inc.Distributor | SKU | Stock | Cost | |
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DigiKey | 505-EVAL-AD7747EBZ-ND | 6 | $76.97 | Buy |
Mouser Electronics | 584-EVAL-AD7747EBZ | 6 | $78.87 | Buy |
Arrow North American Components | EVAL-AD7747EBZ | 6 | $71.77 | Buy |
Analog Devices Inc | EVAL-AD7747EBZ | $76.21 | Buy | |
Verical Marketplace | EVAL-AD7747EBZ | 106 | $74.97 | Buy |
element14 APAC | EVAL-AD7747EBZ | 4 | * $81.52 | Buy |
Farnell | EVAL-AD7747EBZ | 4 | * $78.10 | Buy |
Newark | EVAL-AD7747EBZ | 3 | $79.60 | Buy |
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