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ADA4350ARUZ-R7 bảng dữ liệu(PDF) 1 Page - Analog Devices |
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ADA4350ARUZ-R7 bảng dữ liệu(HTML) 1 Page - Analog Devices |
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1 / 38 page  FET Input Analog Front End with ADC Driver Data Sheet ADA4350 Rev. B 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 ©2015–2016 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Low noise, low input bias current FET input amplifier Very low input bias current: ±0.25 pA typical at 25°C Low input voltage noise 92 nV/√Hz typical at 10 Hz at 5 V 5 nV/√Hz typical at 100 kHz at ±5 V Gain bandwidth product: 175 MHz Input capacitance 3 pF typical, differential mode 2 pF typical, common mode Integrated gain switching Sampling and feedback switch off leakage: ±0.5 pA typical Worst case tON/tOFF times: 105 ns typical/65 ns typical Integrated analog-to-digital converter (ADC) driver Differential mode and single-ended mode Adjustable output common-mode voltage −5 V to +3.8 V typical for ±5 V supply Wide output voltage swing: ±4.8V minimum for ±5 V supply Linear output current: 18 mA rms typical for ±5V supply SPI or parallel switch control of all functions Wide operating range: 3.3 V to 12 V Quiescent current: 8.5 mA typical (±5 V full system) APPLICATIONS Current to voltage (I to V) conversions Photodiode preamplifiers Chemical analyzers Mass spectrometry Molecular spectroscopy Laser/LED receivers Data acquisition systems GENERAL DESCRIPTION The ADA4350 is an analog front end for photodetectors or other sensors whose output produces a current proportional to the sensed parameter or voltage input applications where the system requires the user to select between very precise gain levels to maximize the dynamic range. The ADA4350 integrates a FET input amplifier, a switching network, and an ADC driver with all functions controllable via a serial peripheral interface (SPI) or parallel control logic into a single IC. The FET input amplifier has very low voltage noise and current noise making it an excellent choice to work with a wide range of photodetectors, sensors, or precision data acquisition systems. Its switching network allows the user individual selection of up to six different, externally configurable feedback networks; by using external components for the feedback network, the user can more easily match the system to their desired photodetector or sensor capacitance. This feature also allows the use of low thermal drift resistors, if required. The design of the switches minimizes error sources so that they add virtually no error in the signal path. The output driver can be used in either single-ended or a differential mode and is ideal for driving the input of an ADC. The ADA4350 can operate from a single +3.3 V supply or a dual ±5 V supply, offering user flexibility when choosing the polarity of the detector. It is available in a Pb-free, 28-lead TSSOP package and is specified to operate over the −40°C to +85°C temperature range. Multifunction pin names may be referenced by their relevant function only. FUNCTIONAL BLOCK DIAGRAM VOUT2 ADC DRIVER SWITCHING NETWORK FET AMP IN-P VOUT1 SPI INTERFACE IN-N ADA4350 3 26 25 23 2 28 1 27 4 5 6 7 8 9 22 21 20 19 17 16 13 12 11 10 S0 S1 S2 S6 S7 S8 S3 S4 S5 S9 S10 S11 M1 P1 Figure 1. |
Số phần tương tự - ADA4350ARUZ-R7 |
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Mô tả tương tự - ADA4350ARUZ-R7 |
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