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ADS4142 bảng dữ liệu(PDF) 4 Page - Texas Instruments |
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ADS4142 bảng dữ liệu(HTML) 4 Page - Texas Instruments |
4 / 61 page ADS4128 SBAS578 – MAY 2012 www.ti.com RECOMMENDED OPERATING CONDITIONS Over operating free-air temperature range, unless otherwise noted. ADS4128 MIN TYP MAX UNIT SUPPLIES AVDD Analog supply voltage 1.7 1.8 1.9 V DRVDD Digital supply voltage 1.7 1.8 1.9 V ANALOG INPUTS Differential input voltage range(1) 2 VPP Input common-mode voltage VCM ± 0.05 V With 2-VPP input amplitude (2) 400 MHz Maximum analog input frequency With 1-VPP input amplitude (2) 800 MHz CLOCK INPUT Input clock sample rate Enabled(3) 20 80 MSPS Low-speed mode Disabled(3) > 80 200 MSPS Sine wave, ac-coupled 0.2 1.5 VPP LVPECL, ac-coupled 1.6 VPP Input clock amplitude differential (VCLKP – VCLKM) LVDS, ac-coupled 0.7 VPP LVCMOS, single-ended, ac-coupled 1.8 V Low-speed mode enabled 40 50 60 % Input clock duty cycle Low-speed mode disabled 35 50 65 % DIGITAL OUTPUTS Maximum external load capacitance from each CLOAD 5 pF output pin to DRGND Differential load resistance between the LVDS RLOAD 100 Ω output pairs (LVDS mode) TA Operating free-air temperature –40 +85 °C (1) With 0-dB gain. See the Fine Gain section in the Application Information for relation between input voltage range and gain. (2) See the Theory of Operation section in the Application Information. (3) See the Serial Interface section for details on low-speed mode. Table 2. HIGH PERFORMANCE MODES(1)(2)(3) MODE DESCRIPTION Set the MODE 1 register bits to get best performance across sample clock and input signal frequencies. Mode 1 Register address = 03h, register data = 03h Set the MODE 2 register bit to get best performance at high input signal frequencies. Mode 2 Register address = 4Ah, register data = 01h (1) It is recommended to use these modes to get best performance. These modes can be set using the serial interface only. (2) See the Serial Interface section for details on register programming. (3) Note that these modes cannot be set when the serial interface is not used (when the RESET pin is tied high); see the Device Configuration section. 4 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): ADS4128 |
Số phần tương tự - ADS4142 |
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Mô tả tương tự - ADS4142 |
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