Datasheet AD7685 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 16-Bit, 250 kSPS PulSAR® ADC in MSOP/QFN |
| Pages / Page | 29 / 5 — AD7685. Data Sheet. Table 3. Parameter. Test Conditions/Comments. Min. … |
| Revision | D |
| File Format / Size | PDF / 549 Kb |
| Document Language | English |
AD7685. Data Sheet. Table 3. Parameter. Test Conditions/Comments. Min. Typ. Max. Unit
Model Line for this Datasheet
Text Version of Document
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AD7685 Data Sheet
VDD = 2.3 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 Test Conditions/Comments Min Typ Max Unit
REFERENCE Voltage Range 0.5 VDD + 0.3 V Load Current 250 kSPS, REF = 5 V 50 µA SAMPLING DYNAMICS −3 dB Input Bandwidth 2 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 straight binary 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 2.3 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 = 2.5 V, 100 SPS throughput 1.4 µW VDD = 2.5 V, 100 kSPS throughput 1.35 2.4 mW VDD = 2.5 V, 200 kSPS throughput 2.7 4.8 mW VDD = 5 V, 100 kSPS throughput 4 6 mW VDD = 5 V, 250 kSPS throughput 10 15 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. D | Page 4 of 28 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Terminology Typical Performance Characteristics Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Inputs Driver Amplifier Choice 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-Wire, 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 Performance of the AD7685 True 16-Bit Isolated Application Example Outline Dimensions Ordering Guide
AD7685 Data Sheet
VDD = 2.3 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 Test Conditions/Comments Min Typ Max Unit
REFERENCE Voltage Range 0.5 VDD + 0.3 V Load Current 250 kSPS, REF = 5 V 50 µA SAMPLING DYNAMICS −3 dB Input Bandwidth 2 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 straight binary 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 2.3 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 = 2.5 V, 100 SPS throughput 1.4 µW VDD = 2.5 V, 100 kSPS throughput 1.35 2.4 mW VDD = 2.5 V, 200 kSPS throughput 2.7 4.8 mW VDD = 5 V, 100 kSPS throughput 4 6 mW VDD = 5 V, 250 kSPS throughput 10 15 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. D | Page 4 of 28 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Terminology Typical Performance Characteristics Theory of Operation Circuit Information Converter Operation Transfer Functions Typical Connection Diagram Analog Inputs Driver Amplifier Choice 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-Wire, 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 Performance of the AD7685 True 16-Bit Isolated Application Example Outline Dimensions Ordering Guide
