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ADS4229 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS4229 Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 66 page  ADS42B49 SBAS558B – DECEMBER 2012 – REVISED JANUARY 2013 www.ti.com RECOMMENDED OPERATING CONDITIONS Over operating free-air temperature range, unless otherwise noted. PARAMETER MIN NOM MAX UNIT SUPPLIES AVDD Analog supply voltage 1.8 1.9 2 V AVDD_BUF Analog buffer supply voltage 3.15 3.3 3.45 V DRVDD Digital supply voltage 1.7 1.8 2 V ANALOG INPUTS VID Differential input voltage range 2 VPP VICR Input common-mode voltage VCM ± 0.05 V Maximum analog input frequency with 2-VPP input amplitude (1) 400 MHz Maximum analog input frequency with 1.6-VPP input amplitude (1) 500 MHz CLOCK INPUT Input clock sample rate Low-speed mode enabled(2) 1 80 MSPS Low-speed mode disabled(2) (by default after reset) 80 250 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 1.5 V Input clock duty cycle Low-speed mode disabled 45 50 55 % Low-speed mode enabled 40 50 60 % DIGITAL OUTPUTS CLOAD Maximum external load capacitance from each output pin to DRGND 3.3 pF RLOAD Differential load resistance between the LVDS output pairs (LVDS mode) 100 Ω TA Operating free-air temperature –40 +85 °C (1) See the Analog Input section in the Application Information. (2) See the Serial Interface Configuration section for details on programming the low-speed mode. HIGH-PERFORMANCE MODES(1)(2) PARAMETER DESCRIPTION Set the HIGH PERF MODE[0] to improve SNR in CMOS mode by approximately 0.5 dB at 170 MHz. Register Address = 03h, data = 02h Set the HIGH PERF MODE[1:11] bits to obtain best performance across input signal frequencies. Register Address = 06h, data = 06h High-performance modes Register Address = BAh, data = 08h Register Address = D5h, data = 20h Register Address = D9h, data = 22h Register Address = DBh, data = E0h Register Address = DCh, data = 22h (1) TI recommends using these modes to obtain best performance. (2) See the Serial Interface Configuration section for details on register programming. 4 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Product Folder Links: ADS42B49 |
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