Datasheet AD7946 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | 14-Bit, 500 kSPS PulSAR ADC in MSOP |
| Seiten / Seite | 25 / 7 — AD7946. Data Sheet. ABSOLUTE MAXIMUM RATINGS Table 5. Parameter. Rating. … |
| Revision | B |
| Dateiformat / Größe | PDF / 605 Kb |
| Dokumentensprache | Englisch |
AD7946. Data Sheet. ABSOLUTE MAXIMUM RATINGS Table 5. Parameter. Rating. ESD CAUTION. 500µA. IOL. 1.4V. SDO. 50pF. IOH. 70% OVDD. 30% VIO. tDELAY
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AD7946 Data Sheet ABSOLUTE MAXIMUM RATINGS Table 5.
Stresses above those listed under Absolute Maximum Ratings
Parameter Rating
may cause permanent damage to the device. This is a stress Analog Inputs rating only; functional operation of the device at these or any IN+1, IN−1 GND − 0.3 V to VDD + 0.3 V or other conditions above those indicated in the operational ±130 mA section of this specification is not implied. Exposure to absolute REF GND − 0.3 V to VDD + 0.3 V maximum rating conditions for extended periods may affect Supply Voltages device reliability. VDD, VIO to GND −0.3 V to +7 V VDD to VIO ±7 V Digital Inputs to GND −0.3 V to VIO + 0.3 V
ESD CAUTION
Digital Outputs to GND −0.3 V to VIO + 0.3 V Storage Temperature Range −65°C to +150°C Junction Temperature 150°C θJA Thermal Impedance 10-Lead MSOP 200°C/W 10-Lead LFCSP 48.7°C/W θJC Thermal Impedance 10-Lead MSOP 44°C/W 10-Lead LFCSP 2.96°C/W Lead Temperature Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C 1 See the Analog Input section.
500µA IOL TO 1.4V SDO CL 50pF
002
500µA IOH
04656- Figure 2. Load Circuit for Digital Interface Timing
70% OVDD 30% VIO tDELAY tDELAY 2V or OVDD – 0.5V1 2V or VIO – 0.5V1 0.8V or 0.5V2 0.8V or 0.5V2 NOTES 12V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V. 20.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
04656-003 Figure 3. Voltage Levels for Timing Rev. B | Page 6 of 24 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Input Driver Amplifier Choice Voltage Reference Input Power Supply Supplying the ADC from the Reference Single-Supply Application Digital Interface CS/ MODE 3-Wire, No BUSY Indicator CS/ Mode 3-Wire with BUSY Indicator CS/ Mode 4-Wire, No BUSY Indicator CS/ Mode 4-Wire with BUSY Indicator Chain Mode, No BUSY Indicator Chain Mode with BUSY Indicator Application Guidelines Layout Evaluating the Performance of the AD7946 Outline Dimensions Ordering Guide
AD7946 Data Sheet ABSOLUTE MAXIMUM RATINGS Table 5.
Stresses above those listed under Absolute Maximum Ratings
Parameter Rating
may cause permanent damage to the device. This is a stress Analog Inputs rating only; functional operation of the device at these or any IN+1, IN−1 GND − 0.3 V to VDD + 0.3 V or other conditions above those indicated in the operational ±130 mA section of this specification is not implied. Exposure to absolute REF GND − 0.3 V to VDD + 0.3 V maximum rating conditions for extended periods may affect Supply Voltages device reliability. VDD, VIO to GND −0.3 V to +7 V VDD to VIO ±7 V Digital Inputs to GND −0.3 V to VIO + 0.3 V
ESD CAUTION
Digital Outputs to GND −0.3 V to VIO + 0.3 V Storage Temperature Range −65°C to +150°C Junction Temperature 150°C θJA Thermal Impedance 10-Lead MSOP 200°C/W 10-Lead LFCSP 48.7°C/W θJC Thermal Impedance 10-Lead MSOP 44°C/W 10-Lead LFCSP 2.96°C/W Lead Temperature Vapor Phase (60 sec) 215°C Infrared (15 sec) 220°C 1 See the Analog Input section.
500µA IOL TO 1.4V SDO CL 50pF
002
500µA IOH
04656- Figure 2. Load Circuit for Digital Interface Timing
70% OVDD 30% VIO tDELAY tDELAY 2V or OVDD – 0.5V1 2V or VIO – 0.5V1 0.8V or 0.5V2 0.8V or 0.5V2 NOTES 12V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V. 20.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
04656-003 Figure 3. Voltage Levels for Timing Rev. B | Page 6 of 24 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configurations and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Input Driver Amplifier Choice Voltage Reference Input Power Supply Supplying the ADC from the Reference Single-Supply Application Digital Interface CS/ MODE 3-Wire, No BUSY Indicator CS/ Mode 3-Wire with BUSY Indicator CS/ Mode 4-Wire, No BUSY Indicator CS/ Mode 4-Wire with BUSY Indicator Chain Mode, No BUSY Indicator Chain Mode with BUSY Indicator Application Guidelines Layout Evaluating the Performance of the AD7946 Outline Dimensions Ordering Guide