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ADS5240IPAP bảng dữ liệu(PDF) 4 Page - Burr-Brown (TI) |
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ADS5240IPAP bảng dữ liệu(HTML) 4 Page - Burr-Brown (TI) |
4 / 24 page www.ti.com ELECTRICAL CHARACTERISTICS ADS5240 SBAS326C – JUNE 2004 – REVISED DECEMBER 2004 T MIN = -40°C and TMAX = +85°C. Typical values are at TA = 25°C, clock frequency = 40MSPS, 50% clock duty cycle, AVDD = 3.3V, LVDD = 3.3V differential, transformer coupled inputs, -1dBFS, I SET = 56.2kΩ, internal voltage reference, and LDVS buffer current at 3.5mA per channel, unless otherwise noted. ADS5240 PARAMETER TEST CONDITIONS MIN TYP MAX UNITS DC ACCURACY No Missing Codes Assured DNL Differential Nonlinearity fIN = 5MHz -0.9 ±0.4 +0.9 LSB INL Integral Nonlinearity fIN = 5MHz -2.0 ±0.75 +2.0 LSB Offset Error(1) -0.75 ±0.2 +0.75 %FS Offset Temperature Coefficient 14 ppm/ °C Fixed Attenuation in Channel(2) 1 %FS Variable Attenuation in Channel(3) ±0.2 %FS Gain Error(4) REFT - REFB -5 ±1.0 +5 %FS Attenuation Temperature 44 ppm/ °C Coefficient(5) POWER SUPPLY ICC Total Supply Current VIN = FS, FIN = 5MHz 184 mA I(AVDD) Analog Supply Current VIN = FS, FIN = 5MHz 142 mA VIN = FS, FIN = 5MHz, I(LVDD) Digital Output Driver Supply Current 42 mA LVDS into 100 Ω Load Power Dissipation 607 650 mW Power-Down Clock Running 95 mW REFERENCE VOLTAGES VREFT Reference Top (internal) 1.95 2.0 2.05 V VREFB Reference Bottom (internal) 0.95 1.0 1.05 V VCM Common-Mode Voltage 1.45 1.5 1.55 V VCM Output Current(6) ±50mV Change in Voltage ±2 mA VREFT Reference Top (external) 1.875 V VREFB Reference Bottom (external) 1.125 V External Reference Input Current(7) 1.0 mA ANALOG INPUT Differential Input Capacitance 4.0 pF Analog Input Common-Mode Range VCM ± 0.05 V Differential Input Voltage Range 1.5 2.02 VPP Differential Input Signal at 4VPP Voltage Overhead Recovery Time 4.0 CLK Cycles Recovery to Within 1% of Code Input Bandwidth -3dBFS 300 MHz DIGITAL DATA OUTPUTS Data Bit Rate 240 480 MBPS (1) Offset error is the deviation of the average code from mid-code for a zero input. Offset error is expressed in terms of % of full-scale. (2) Fixed attenuation in the channel arises due to a fixed attenuation of about 1% in the sample-and-hold amplifier. When the differential voltage at the analog input pins are changed from -VREF to +VREF, the swing of the output code is expected to deviate from the full-scale code (4096LSB) by the extent of this fixed attenuation. NOTE: VREF is defined as (REFT - REFB). (3) Variable attenuation in the channel refers to the attenuation of the signal in the channel over and above the fixed attenuation. (4) The reference voltages are trimmed at production so that (VREFT - VREFB) is within ± 50mV of the ideal value of 1V. It does not include fixed attenuation. (5) The attenuation temperature coefficient refers to the temperature coefficient of the attenuation in the channel. It does not account for the variation of the reference voltages with temperature. (6) VCM provides the common-mode current for the inputs of all four channels when the inputs are AC-coupled. The VCM output current specified is the additional drive of the VCM buffer if loaded externally. (7) Average current drawn from the reference pins in the external reference mode. 4 |
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