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ADS4249 bảng dữ liệu(PDF) 6 Page - Texas Instruments |
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ADS4249 bảng dữ liệu(HTML) 6 Page - Texas Instruments |
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6 / 67 page  ADS4249 SBAS534B – JULY 2011 – REVISED SEPTEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS: GENERAL Typical values are at +25 °C, AVDD = 1.8 V, DRVDD = 1.8 V, 50% clock duty cycle, and –1 dBFS differential analog input, unless otherwise noted. Minimum and maximum values are across the full temperature range: TMIN = –40°C to TMAX = +85°C, AVDD = 1.8 V, and DRVDD = 1.8 V. ADS4249 PARAMETER MIN TYP MAX UNIT ANALOG INPUTS Differential input voltage range 2 VPP Differential input resistance (at 200 MHz) 0.75 k Ω Differential input capacitance (at 200 MHz) 3.7 pF Analog input bandwidth 550 MHz (with 50- Ω source impedance, and 50-Ω termination) Analog input common-mode current 1.5 µA/MSPS (per input pin of each channel) Common-mode output voltage VCM 0.95(1) V VCM output current capability 4 mA DC ACCURACY Offset error –15 2.5 15 mV Temperature coefficient of offset error 0.003 mV/ °C Gain error as a result of internal reference inaccuracy alone EGREF –2 2 %FS Gain error of channel alone EGCHAN ±0.1 1 %FS Temperature coefficient of EGCHAN 0.002 Δ%/°C POWER SUPPLY IAVDD 167 190 mA Analog supply current IDRVDD Output buffer supply current 144 160 mA LVDS interface, 350-mV swing with 100- Ω external termination, fIN = 2.5 MHz IDRVDD Output buffer supply current 94 mA CMOS interface, no load capacitance, fIN = 2.5 MHz (2) Analog power 301 342 mW Digital power 259 288 mW LVDS interface, 350-mV swing with 100- Ω external termination, fIN = 2.5 MHz Digital power CMOS interface, 8-pF external load capacitance(2) 169 mW fIN = 2.5 MHz Global power-down 25 mW (1) VCM changes to 0.87 V when serial register bits HIGH PERF MODE[7:2] are set. (2) In CMOS mode, the DRVDD current scales with the sampling frequency, the load capacitance on output pins, input frequency, and the supply voltage (see the CMOS Interface Power Dissipation section in the Application Information). 6 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): ADS4249 |
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