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AD7949 Scheda tecnica(PDF) 4 Page - Analog Devices |
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AD7949 Scheda tecnica(HTML) 4 Page - Analog Devices |
4 / 20 page AD7689 Preliminary Technical Data Rev. PrC | Page 4 of 20 VDD = 2.5 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, all specifications TMIN to TMAX, unless otherwise noted. Table 3. Parameter Conditions/Comments Min Typ Max Unit INTERNAL REFERENCE Output Voltage For 4.096 V output, @ 25°C 4.086 4.096 4.106 V For 2.5 V output, @ 25°C 2.490 2.500 2.510 V Temperature Drift –40°C to +85°C ±TBD ppm/°C Line Regulation VDD = 5 V ± 5% ±TBD ppm/V Long-Term Drift 1000 hours 50 ppm Turn-On Settling Time CREF = 22 μF TBD ms EXTERNAL REFERENCE Voltage Range REF Input 0.5 VDD + 0.3 V REFIN Input (Buffered) 0.5 4.096 V Current Drain 250 kSPS, REF = 5V 50 μA TEMPERATURE SENSOR Output Voltage1 @ 25°C 283 mV Temperature Sensitivity 1 mV/°C DIGITAL INPUTS Logic Levels VIL −0.3 +0.3 × VIO V VIH 0.7 × VIO VIO + 0.3 V IIL −1 +1 μA IIH −1 +1 μA DIGITAL OUTPUTS Data Format2 Pipeline Delay3 VOL ISINK = +500 μA 0.4 V VOH ISOURCE = −500 μA VIO − 0.3 V POWER SUPPLIES VDD Specified performance 2.3 5.5 V VIO Specified performance 2.3 VDD + 0.3 V VIO Range 1.8 VDD + 0.3 V Standby Current4, 5 VDD and VIO = 5 V, 25°C 1 50 nA Power Dissipation VDD = 5V , 100 kSPS throughput 6 mW VDD = 5V , 250 kSPS throughput 15 mW VDD = 5V , 250 kSPS throughput internal reference and buffer enabled 18.5 mW Energy per Conversion 50 nJ TEMPERATURE RANGE6 Specified Performance TMIN to TMAX −40 +85 °C 1 The output voltage is internal and present on a dedicated multiplexer input. 2 Unipolar mode: serial 16-bit straight binary Bipolar mode: serial 16-bit 2’s complement. 3 Conversion results available immediately after completed conversion. 4 With all digital inputs forced to VIO or GND as required. 5 During acquisition phase. 6 Contact an Analog Devices sales representative for the extended temperature range. |
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