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ADS5281IRGCT bảng dữ liệu(PDF) 3 Page - Texas Instruments |
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ADS5281IRGCT bảng dữ liệu(HTML) 3 Page - Texas Instruments |
3 / 41 page www.ti.com RECOMMENDED OPERATING CONDITIONS (1) INITIALIZATION REGISTERS ADS5281 ADS5282 SBAS397E – DECEMBER 2006 – REVISED JANUARY 2008 ADS528x PARAMETER MIN TYP MAX UNIT SUPPLIES, ANALOG INPUTS, AND REFERENCE VOLTAGES AVDD Analog supply voltage 3.0 3.3 3.6 V LVDD Digital supply voltage 1.7 1.8 1.9 V Differential input voltage range 2 VPP Input common-mode voltage VCM ± 0.05 V REFT External reference mode 2.5 V REFB External reference mode 0.5 V CLOCK INPUTS ADCLK input sample rate 1/ tC 10 50, 65 MSPS Input clock amplitude differential (VCLKP–VCLKN) peak-to-peak Sine wave, ac-coupled 3.0 VPP LVPECL, ac-coupled 1.6 VPP LVDS, ac-coupled 0.7 VPP Input clock CMOS, single-ended (VCLKP) VIL 0.6 V VIH 2.2 V Input clock duty cycle 50 % DIGITAL OUTPUTS ADCLKP and ADCLKN outputs (LVDS) 10 1x (sample rate) 50, 65 MHz LCLKP and LCLKN outputs (LVDS) 60 6x (sample rate) 300, 390 MHz CLOAD Maximum external capacitance from each pin to LVSS 5 pF RLOAD Differential load resistance between the LVDS output pairs 100 Ω TA Operating free-air temperature –40 +85 °C (1) All conditions are common to the ADS528x family. After the device has been powered up, the following registers need to be written (in the exact order listed below) through the serial interface as part of an initialization sequence. ADDRESS (hex) DATA (hex) Initialization register 1 03 0002 Initialization register 2 01 0010 Initialization register 3 C7 8001 Initialization register 4 DE 01C0 If the analog input is ac-coupled, the following needs to be written in addition to the above registers. ADDRESS (hex) DATA (hex) Initialization register 5 E2 00C0 The purpose of the above registers is to configure the device in the most optimum mode of operation. Copyright © 2006–2008, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS5281 ADS5282 |
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