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ADS5287IRGCT Datasheet(PDF) 3 Page - Texas Instruments |
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ADS5287IRGCT Datasheet(HTML) 3 Page - Texas Instruments |
3 / 31 page www.ti.com RECOMMENDED OPERATING CONDITIONS INITIALIZATION REGISTERS ADS5287 SBAS428 – JANUARY 2008 ADS5287 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 After the device has been powered up, the following registers must be written to (in the exact order listed) 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, register 5 must be be written to. ADDRESS (hex) DATA (hex) Initialization register 5 E2 00C0 Initializing these registers configures the device for the most optimum mode of operation. Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS5287 |
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