AD7745/AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor Data Sheet (Rev. 0)
DESCRIPTION The AD7745/AD7746 are a high resolution, - capacitance-to-digital converter (CDC). The capacitance to be measured is connected directly to the device inputs. The architecture fea-tures inherent high resolution (24-bit no missing codes, up to 21-bit effective resolution), high linearity ( 0.01%), and high accuracy ( 4 fF factory calibrated). The AD7745/AD7746 capacitance nput range is 4 pF (changing), while 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 AD7745 has one capacitance input channel, while the AD7746 has two channels. Each channel can be configured as single-ended or differential. The AD7745/AD7746 are designed for floating capacitive sensors. For capacitive sensors with one plate connted to ground, the AD7747 is recommended. The parts have an on-chip temperature sensor with a resolution of 0.1 C and accuracy of 2 C. The on-chip voltage reference and FEATURES Capacitance-to-digital converter New standard in single chip solutions Interfaces to single or differential floating sensors Resolution down to 4 aF (that is, up to 21 ENOB) Accuracy: 4 fF Linearity: 0.01% Common-mode (not changing) capacitance up to 17 pF Full-scale (changing) capacitance range: 4 pF Tolerant of parasitic capacitance to ground up to 60 pF Update rate: 10 Hz to 90 Hz Simultaneous 50 Hz and 60 Hz rejection at 16 Hz Temperature sensor on-chip Resolution: 0.1 C, accuracy: 2 C Voltage input channel Internal clock oscillator 2-wire serial interface (I2C-compatible) Power 2.7 V to 5.25 V single-supply operation 0.7 mA current consumption Operating temperature: 40 C to +125 C 16-lead TSSOP package APPLICATIONS Automotive, industria, and medical systems for Pressure measurement Position sensing Level sensing Flowmeters Humidity sensing Impurity detection GENERAL DESCRIPTION The AD7745/AD7746 are a high resolution, - capacitance-to-digital converter (CDC). The capacita Specifications subject to change without notic
Datasheet URL:
Relevant Keywords:
AD7746, VDD/2, GND2, AD7745_7746, SENSOR7, CONNECT05468-005, VREF/2, AD7745/AD7746, OPEN-DRAIN, CONNECT05468-004, VDD/8, AD7745, INTERFACE1, AD7747, VDD/4, 2N3906, INPUT7
Bookmark/Search this post with:
Related Datasheets:
Other Descriptions
| SENSOR7 Fichetechnique | SENSOR7 Схематический | SENSOR7 Ficha técnica | SENSOR7 Distributor |
| SENSOR7 Operating Parameter | SENSOR7 Circuit | SENSOR7 EOL | SENSOR7 equivalente |
| SENSOR7 数据 | SENSOR7 Availability | SENSOR7 Revision | SENSOR7 Product Brief |
| SENSOR7 Fiche technique | SENSOR7 Schematische | SENSOR7 Inventory | OPEN-DRAIN PDF |
| OPEN-DRAIN Feature | OPEN-DRAIN Errata | OPEN-DRAIN Distributor | OPEN-DRAIN Release Notes |
| OPEN-DRAIN Capacity | OPEN-DRAIN Design | OPEN-DRAIN Application Note | OPEN-DRAIN Fiche technique |
| OPEN-DRAIN データシート | OPEN-DRAIN Datenblatt | OPEN-DRAIN Schematische | OPEN-DRAIN Stock |
| OPEN-DRAIN Fichatécnicade | OPEN-DRAIN Options | GND2 相等于 | GND2 Ficha técnica de |
| GND2 Lead Time | GND2 Schéma | GND2 Application Note | GND2 Archive |
| GND2 Schematico | GND2 Operating Parameter | GND2 Options | GND2 Схематический |
| GND2 Leadtime | GND2 Distribution | GND2 Broker | GND2 Capacity |
| GND2 Samples | VDD/8 Schematic | VDD/8 Design Idea | VDD/8 Operating Parameter |
| VDD/8 Specs | VDD/8 数据 | VDD/8 Process Change Notification | VDD/8 Explanation |
| VDD/8 Reference Design | VDD/8 Catalog | VDD/8 Stock | VDD/8 回路図 |
| VDD/8 Inventory | VDD/8 회로도 | VDD/8 Schematico | VDD/8 Samples |
| INTERFACE1 Feature | INTERFACE1 Prototype | INTERFACE1 Esquema | INTERFACE1 Xref |
| INTERFACE1 equivalente | INTERFACE1 δελτίο | INTERFACE1 Design | INTERFACE1 Revision |
| INTERFACE1 Archive | INTERFACE1 Technical Specs | INTERFACE1 Datenblatt | INTERFACE1 Schematische |
| INTERFACE1 Catalog | INTERFACE1 Schematico | INTERFACE1 Leadtime | AD7746 End-of-Life |
| AD7746 Data Sheet | AD7746 Component | AD7746 Ficha técnica | AD7746 Specs |
| AD7746 equivalente | AD7746 Pin-out | AD7746 данные | AD7746 Example |
| AD7746 Product Brief | AD7746 データシート | AD7746 Suffix | AD7746 Catalog |
| AD7746 相等于 | AD7746 Mechanical Outline | INPUT7 Scheda | INPUT7 User Guide |
| INPUT7 Errata | INPUT7 Circuit | INPUT7 Schéma | INPUT7 δελτίο |
| INPUT7 Design | INPUT7 Availability | INPUT7 Example | INPUT7 Revision |
| INPUT7 Archive | INPUT7 Datenblatt | INPUT7 Ersatz | INPUT7 Stock |
| INPUT7 Equivalent | AD7747 回路図 | AD7747 Pin-out | AD7747 δελτίο |
| AD7747 Application Note | AD7747 équivalent | AD7747 Design | AD7747 Circuit |
| AD7747 данные | AD7747 Mechanical Outline | AD7747 Fichatécnicade | AD7747 Ficha técnica de |
| AD7747 Cross Reference | AD7747 Revision | AD7747 Schéma | AD7747 Distributor |
| VDD/2 MOQ | VDD/2 End-of-Life | VDD/2 PCN | VDD/2 gleichwertige |
| VDD/2 Esquema | VDD/2 Features | VDD/2 Distributor | VDD/2 Operating Parameter |
| VDD/2 Specs | VDD/2 equivalente | VDD/2 数据 | VDD/2 Design |
| VDD/2 Revision | VDD/2 Inventory | VDD/2 Leadtime | AD7745_7746 Схематический |
| AD7745_7746 相等於 | AD7745_7746 Component | AD7745_7746 Ficha técnica | AD7745_7746 Esquema |
| AD7745_7746 Capacity | AD7745_7746 данные | AD7745_7746 Application Note | AD7745_7746 Explanation |
| AD7745_7746 Technical Specs | AD7745_7746 Schematische | AD7745_7746 Stock | AD7745_7746 相等于 |
| AD7745_7746 回路図 | AD7745_7746 Inventory |