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AD7747,pdf datasheet (with Tem
消耗积分:3 |
格式:rar |
大小:572 |
2009-09-10
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The AD7747 is a high-resolution, Σ-Δ 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.
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.
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