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ADS5282 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS5282 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 44 page www.ti.com RECOMMENDED OPERATING CONDITIONS (1) INITIALIZATION REGISTERS ADS5281 ADS5282 SBAS397H – DECEMBER 2006 – REVISED MARCH 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 must be written to (in the exact order listed below) through the serial interface as part of an initialization sequence. (1) ADDRESS (hex) DATA (hex) Initialization Register 1(1) 03 0002 Initialization Register 2(1) 01 0010 Initialization Register 3(1) C7 8001 Initialization Register 4(1) DE 01C0 (1) It is no longer necessary to write these initialization registers. However, customers who have already included them in their software can continue to use them. Programming these registers does not affect device performance. If the analog input is ac-coupled, the following registers must be written to in the order listed below. ADDRESS (hex) DATA (hex) Initialization Register 1 01 0010 Initialization Register 5 E2 00C0 Copyright © 2006–2008, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS5281 ADS5282 |
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