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ADS4128 Datasheet(PDF) 6 Page - Texas Instruments |
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ADS4128 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 62 page ADS4128 SBAS578 – MAY 2012 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 0-dB gain, 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. ADS4128 PARAMETER MIN TYP MAX UNIT ANALOG INPUTS Differential input voltage range 2 VPP Differential input resistance (at dc); see Figure 41 > 1 M Ω Differential input capacitance; see Figure 42 4 pF Analog input bandwidth 550 MHz Analog input common-mode current (per input pin) 0.6 µA/MSPS VCM Common-mode output voltage 0.95 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 EGREF –2 2 %FS alone EGCHAN Gain error of channel alone –0.2 ±1 %FS Temperature coefficient of EGCHAN 0.001 Δ%/°C POWER SUPPLY IAVDD Analog supply current 85 113 mA Output buffer supply current LVDS interface with 100- Ω external termination 43 mA Low LVDS swing (200 mV) Output buffer supply current LVDS interface with 100- Ω external termination 55 72 mA IDRVDD(1) Standard LVDS swing (350 mV) Output buffer supply current(1)(2) CMOS interface(2) 33 mA 8-pF external load capacitance fIN = 2.5 MHz Analog power 153 mW Digital power LVDS interface 77 mW Low LVDS swing (200 mV) Digital power CMOS interface(2) 59 mW 8-pF external load capacitance fIN = 2.5 MHz Global power-down 10 25 mW Standby 185 mW (1) The maximum DRVDD current with CMOS interface depends on the actual load capacitance on the digital output lines. Note that the maximum recommended load capacitance on each digital output line is 10 pF. (2) In CMOS mode, the DRVDD current scales with the sampling frequency, the load capacitance on the output pins, input frequency, and the supply voltage (see the CMOS Interface Power Dissipation section in the Application Information). 6 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Link(s): ADS4128 |
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