Datasheet AD7688 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | 500 kSPS 16- BIT Differential PulSAR A/D Converter in µSOIC/QFN |
| Seiten / Seite | 29 / 5 — AD7688. Data Sheet. Table 3. Parameter. Conditions. Min. Typ. Max. Unit |
| Revision | B |
| Dateiformat / Größe | PDF / 570 Kb |
| Dokumentensprache | Englisch |
AD7688. Data Sheet. Table 3. Parameter. Conditions. Min. Typ. Max. Unit
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AD7688 Data Sheet
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 3. Parameter Conditions Min Typ Max Unit
REFERENCE Voltage Range 0.5 VDD + 0.3 V Load Current 500 kSPS, REF = 5 V 100 µA SAMPLING DYNAMICS −3 dB Input Bandwidth 9 MHz Aperture Delay VDD = 5 V 2.5 ns DIGITAL INPUTS Logic Levels VIL –0.3 +0.3 × VIO V VIH 0.7 × VIO VIO + 0.3 V IIL −1 +1 µA IIH −1 +1 µA DIGITAL OUTPUTS Data Format Serial 16 bits twos complement Pipeline Delay Conversion results available immediately after completed conversion VOL ISINK = +500 µA 0.4 V VOH ISOURCE = −500 µA VIO − 0.3 V POWER SUPPLIES VDD Specified performance 4.5 5.5 V VIO Specified performance 2.3 VDD + 0.3 V VIO Range 1.8 VDD + 0.3 V Standby Current1, 2 VDD and VIO = 5 V, 25°C 1 50 nA Power Dissipation VDD = 5 V, 100 SPS throughput 3.75 µW VDD = 5 V, 100 kSPS throughput 3.75 4.3 mW VDD = 5 V, 500 kSPS throughput 21.5 mW TEMPERATURE RANGE3 Specified Performance TMIN to TMAX −40 +85 °C 1 With all digital inputs forced to VIO or GND as required. 2 During acquisition phase. 3 Contact sales for extended temperature range. Rev. B | Page 4 of 28 Document Outline Features Applications Application Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Terminology Typical Performance Characteristics Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Input Driver Amplifier Choice Single-to-Differential Driver Voltage Reference Input Power Supply Supplying the ADC from the Reference Digital Interface /CS Mode 3-Wire, No BUSY Indicator /CS Mode 3-Wire with BUSY Indicator /CS Mode 4-Write, No BUSY Indicator /CS Mode 4-Wire with BUSY Indicator Chain Mode, No BUSY Indicator Chain Mode with BUSY Indicator Application Hints Layout Evaluating the AD7688 Performance Outline Dimensions Ordering Guide
AD7688 Data Sheet
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 3. Parameter Conditions Min Typ Max Unit
REFERENCE Voltage Range 0.5 VDD + 0.3 V Load Current 500 kSPS, REF = 5 V 100 µA SAMPLING DYNAMICS −3 dB Input Bandwidth 9 MHz Aperture Delay VDD = 5 V 2.5 ns DIGITAL INPUTS Logic Levels VIL –0.3 +0.3 × VIO V VIH 0.7 × VIO VIO + 0.3 V IIL −1 +1 µA IIH −1 +1 µA DIGITAL OUTPUTS Data Format Serial 16 bits twos complement Pipeline Delay Conversion results available immediately after completed conversion VOL ISINK = +500 µA 0.4 V VOH ISOURCE = −500 µA VIO − 0.3 V POWER SUPPLIES VDD Specified performance 4.5 5.5 V VIO Specified performance 2.3 VDD + 0.3 V VIO Range 1.8 VDD + 0.3 V Standby Current1, 2 VDD and VIO = 5 V, 25°C 1 50 nA Power Dissipation VDD = 5 V, 100 SPS throughput 3.75 µW VDD = 5 V, 100 kSPS throughput 3.75 4.3 mW VDD = 5 V, 500 kSPS throughput 21.5 mW TEMPERATURE RANGE3 Specified Performance TMIN to TMAX −40 +85 °C 1 With all digital inputs forced to VIO or GND as required. 2 During acquisition phase. 3 Contact sales for extended temperature range. Rev. B | Page 4 of 28 Document Outline Features Applications Application Diagram General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Terminology Typical Performance Characteristics Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Input Driver Amplifier Choice Single-to-Differential Driver Voltage Reference Input Power Supply Supplying the ADC from the Reference Digital Interface /CS Mode 3-Wire, No BUSY Indicator /CS Mode 3-Wire with BUSY Indicator /CS Mode 4-Write, No BUSY Indicator /CS Mode 4-Wire with BUSY Indicator Chain Mode, No BUSY Indicator Chain Mode with BUSY Indicator Application Hints Layout Evaluating the AD7688 Performance Outline Dimensions Ordering Guide