16-Bit, 2 MSPS/1 MSPS, Precision, Differential SAR ADCs Data Sheet AD4001/AD4005 FEATURES GENERAL DESCRIPTION Easy Drive The AD4001/AD4005 are high accuracy, high speed, low power, Greatly reduced input kickback 16-bit, Easy Drive, precision successive approximation register Input current reduced to 0.5 A/MSPS (SAR) analog-to-digital converters (ADCs) that operate from a Enhanced acquisition phase, 79% of cycle time at 1 MSPS single power supply, VDD. The reference voltage, V , is applied REF First conversion accurate, no latency or pipeline delay externally and can be set independent of the supply voltage. The Input span compression for single-supply operation AD4001/AD4005 power scales linearly with throughput. Fast conversion allows low SPI clock rates Easy Drive features reduce both signal chain complexity and Input overvoltage clamp protection sinks up to 50 mA power consumption while enabling higher channel density. The SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface reduced input current, particularly in high-Z mode, coupled with a High performance long signal acquisition phase, eliminates the need for a dedicated Differential analog input range: VREF, VREF from 2.4 V to 5.1 V Throughput: 2 MSPS/1 MSPS options ADC driver. Easy Drive broadens the range of companion INL: 0.4 LSB maximum circuitry that is capable of driving these ADCs (see Figure 2). Guaranteed 16-bit, no missing codes Input span compression eliminates the need to provide a SNR: 96.2 dB at fIN = 1 kHz, VREF = 5 V negative supply to the ADC driver amplifier while preserving THD: 123 dB at fIN = 1 kHz, 99 dB at fIN = 100 kHz access to the full ADC code range. The input overvoltage clamp SINAD: 88.5 dB at fIN = 1 MHz (see Figure 17) protects the ADC inputs against overvoltage events, minimizing Oversampled dynamic range disturbances on the reference pin and eliminating the need for 99.3 dB for OSR = 2 external protection diodes. 126 dB for OSR = 1024 Low power Fast device throughput up to 2 MSPS allows users to accurately Single 1.8 V supply operation with 1.71 V to 5.5 V logic capture high frequency signals and to implement oversampling interface techniques to alleviate the challenges associated with antialias 4.9 mW at 1 MSPS (VDD only) filter designs. Decreased serial peripheral interface (SPI) clock 80 W at 10 kSPS, 16 mW at 2 MSPS (total power) rate requirements reduce digital input and output power 10-lead packages: 3 mm 3 mm LFCSP, 3 mm 4.90 mm MSOP consumption, broadens digital host options, and simplifies the Pin compatible with AD4003/AD4007/AD4011 family task of sending data across digital isolation. The SPI-compatible Guaranteed operation: 40C to +125C serial user interface is compatible with 1.8 V, 2.5 V, 3 V, and 5 V APPLICATIONS logic by using the separate VIO logic supply. Automated test equipment 15 HIGH-Z DISABLED, 2MSPS Machine automation HIGH-Z ENABLED, 2MSPS 12 Medical equipment 9 Battery-powered equipment Precision data acquisition systems 6 Instrumentation and control systems 3 0 FUNCTIONAL BLOCK DIAGRAM 2.4V TO 5.1V 3 1.8V 10F 6 REF VDD VIO 9 V AD4001/ 1.8V TO 5V REF HIGH-Z TURBO AD4005 SDI V /2 REF MODE MODE IN+ 0 12 SCK 3-WIRE OR 4-WIRE SERIAL 16-BIT SDO SPI INTERFACE INTERFACE SAR ADC (DAISY CHAIN, CS) V 15 REF IN STATUS CNV SPAN CLAMP 5 4 3 2 1 01234 5 V /2 BITS REF COMPRESSION 0 INPUT DIFFERENTIAL VOLTAGE (V) GND Figure 2. Input Current vs. Input Differential Voltage Figure 1. Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20172021 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners Technical Support www.analog.com 15368-001 INPUT CURRENT (A) 15368-328AD4001/AD4005 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Driver Amplifier Choice ........................................................... 22 Applications ....................................................................................... 1 Ease of Drive Features ............................................................... 24 Functional Block Diagram .............................................................. 1 Voltage Reference Input ............................................................ 25 General Description ......................................................................... 1 Power Supply ............................................................................... 25 Revision History ............................................................................... 2 Digital Interface .......................................................................... 25 Specif ications ..................................................................................... 4 Register Read/Write Functionality........................................... 27 Timing Specifications .................................................................. 7 Status Bits .................................................................................... 29 Absolute Maximum Ratings ............................................................ 9 CS Mode, 3-Wire Turbo Mode ................................................. 30 Thermal Resistance ...................................................................... 9 CS Mode, 3-Wire Without Busy Indicator ............................. 31 ESD Caution .................................................................................. 9 CS Mode, 3-Wire with Busy Indicator .................................... 32 Pin Configurations and Function Descriptions ......................... 10 CS Mode, 4-Wire Turbo Mode ................................................. 33 Typical Performance Characteristics ........................................... 11 CS Mode, 4-Wire Without Busy Indicator ............................. 34 Terminology .................................................................................... 17 CS Mode, 4-Wire with Busy Indicator .................................... 35 Theory of Operation ...................................................................... 18 Daisy-Chain Mode ..................................................................... 36 Circuit Information .................................................................... 18 Layout Guidelines....................................................................... 37 Converter Operation .................................................................. 19 Evaluating the AD4001/AD4005 Performance .......................... 37 Transfer Functions...................................................................... 19 Outline Dimensions ....................................................................... 38 Applications Information .............................................................. 20 Ordering Guide .......................................................................... 39 Typical Application Diagrams .................................................. 20 Analog Inputs .............................................................................. 21 REVISION HISTORY 2/2021Rev. B to Rev. C Changes to Input Span Compression Section, High-Z Mode Changes to Features Section, Applications Section, General Section, Figure 46 Caption, and Figure 47 Caption ................... 24 Changes Long Acquisition Phase Section, Voltage Reference Description Section, and Figure 2 .................................................. 1 Changes to Specifications Section and Table 1 ............................. 4 Input Section, and Digital Interface Section ............................... 25 Changes to Timing Specifications Section .................................... 7 Deleted Table 12 Renumbered Sequentially .............................. 26 Added Note 1 to Table 2 Renumbered Sequentially ................... 7 Added Configuration Register Details Section, Serial Clock Changes to Note 3, Table 2 .............................................................. 7 Frequency Requirements Section, and Table 12 Renumbered Sequentially ..................................................................................... 26 Deleted Figure 3 Renumbered Sequentially ................................. 7 Added Table 13 and Register Read/Write Functionality Section ... 27 Added Note 1 to Table 3 .................................................................. 8 Added Note 2, Table 5 ...................................................................... 9 Changes to Figure 48 and Figure 49............................................. 28 Changes to Thermal Resistance Section ........................................ 9 Changed Status Word Section to Status Bits Section ................. 29 Changes to Table 7 .......................................................................... 10 Changes to Status Bits Section, Table 15, and Figure 51 ........... 29 Changes to Typical Performance Characteristics Section ......... 11 Changes to CS Mode, 3-Wire Turbo Mode Section and Changes to Terminology Section ................................................. 17 Figure 52 .......................................................................................... 30 Changes to Circuit Information Section and Table 8 ................ 18 Changes to CS Mode, 3-Wire Without Busy Indicator Section Changes to Typical Application Diagram Section ..................... 20 and Figure 54 ................................................................................... 31 Changes to Input Overvoltage Clamp Circuit Section .............. 21 Changes to CS Mode, 3-Wire With Busy Indicator Section and Changes to Driver Amplifier and Table 10 ................................. 22 Figure 56 and Figure 57 ................................................................. 32 Changes to Single to Differential Driver Section, High Changes to CS Mode, 4-Wire Turbo Mode Section and Frequency Input Signals Section, and Multiplexed Applications Figure 58 .......................................................................................... 33 Section .............................................................................................. 23 Changes to Figure 56 and Figure 57............................................. 32 Changes to Figure 58 ...................................................................... 33 Rev. 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