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AD4004BRMZ bảng dữ liệu(PDF) 1 Page - Analog Devices |
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1 / 36 page  16-Bit, 2 MSPS/1 MSPS/500 kSPS, Precision, Pseudo Differential, SAR ADCs Data Sheet AD4000/AD4004/AD4008 Rev. C Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2016–2017 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Throughput: 2 MSPS/1 MSPS/500 kSPS options INL: ±1.0 LSB maximum Guaranteed 16-bit, no missing codes Low power 9.75 mW at 2 MSPS, 4.9 mW at 1 MSPS, 2.5 mW at 500 kSPS (VDD only) 70 µW at 10 kSPS, 14 mW at 2 MSPS (total) SNR: 93 dB typical at 1 kHz, VREF = 5 V; 90 dB typical at 100 kHz THD: −115 dB typical at 1 kHz,VREF = 5V; −95 dB typical at 100 kHz Ease of use features reduce system power and complexity Input overvoltage clamp circuit Reduced nonlinear input charge kickback High-Z mode Long acquisition phase Input span compression Fast conversion time allows low SPI clock rates SPI-programmable modes, read/write capability, status word Pseudo differential (single-ended) analog input range 0 V to VREF with VREF from 2.4 V to 5.1 V Single 1.8 V supply operation with 1.71 V to 5.5 V logic interface SAR architecture: no latency/pipeline delay, valid first conversion First conversion accurate Guaranteed operation: −40°C to +125°C SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface Ability to daisy-chain multiple ADCs and busy indicator 10-lead packages: 3 mm × 3 mm LFCSP, 3 mm × 4.90 mm MSOP APPLICATIONS Automatic test equipment Machine automation Medical equipment Battery-powered equipment Precision data acquisition systems GENERAL DESCRIPTION The AD4000/AD4004/AD4008 are low noise, low power, high speed, 16-bit, precision successive approximation register (SAR) analog-to-digital converters (ADCs). The AD4000, AD4004, and AD4008 offer 2 MSPS, 1 MSPS, and 500 kSPS throughputs, respectively. They incorporate ease of use features that reduce signal chain power consumption, reduce signal chain complexity, and enable higher channel density. The high-Z mode, coupled with a long acquisition phase, eliminates the need for a dedicated high power, high speed ADC driver, thus broadening the range of low power precision amplifiers that can drive these ADCs directly while still achieving optimum performance. The input span compression feature enables the ADC driver amplifier and the ADC to operate off of common supply rails without the need for a negative supply while preserving the full ADC code range. The low serial peripheral interface (SPI) clock rate requirement reduces the digital input/output power consumption, broadens processor options, and simplifies the task of sending data across digital isolation. Operating from a 1.8 V supply, the AD4000/AD4004/AD4008 sample an analog input (IN+) from 0 V to VREF with respect to a ground sense (IN−) with VREF ranging from 2.4 V to 5.1 V. The AD4000 consumes only 14 mW at 2 MSPS with a minimum SCK rate of 70 MHz in turbo mode, the AD4004 consumes only 7 mW at 1 MSPS, and the AD4008 consumes only 3.5 mW at 500 kSPS. The AD4000/AD4004/AD4008 all achieve ±1.0 LSB integral nonlinearity error (INL) maximum, guaranteed no missing codes at 16 bits, and 93 dB signal-to-noise ratio (SNR) for 1 kHz inputs. The reference voltage is applied externally and can be set independently of the supply voltage. The SPI-compatible versatile serial interface features seven different modes including the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus, and provides an optional busy indicator. The AD4000/AD4004/AD4008 are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic, using the separate VIO supply. The AD4000/AD4004 are available in a 10-lead MSOP and a 10-lead LFCSP, and the AD4008 is available in a 10-lead LFCSP, with operation specified from −40°C to +125°C. The devices are pin compatible with the 18-bit, 2 MSPS AD4003 (see Table 8). FUNCTIONAL BLOCK DIAGRAM GND IN+ IN– SDI SCK SDO CNV AD4000/ AD4004/ AD4008 16-BIT SAR ADC SERIAL INTERFACE VIO REF VDD VREF 0 VREF/2 HIGH-Z MODE CLAMP SPAN COMPRESSION TURBO MODE STATUS BITS 2.4V TO 5.1V 1.8V 10µF 1.8V TO 5V 3-WIRE OR 4-WIRE SPI INTERFACE (DAISY CHAIN, CS) Figure 1. |
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