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ADS7828 Arkusz danych(PDF) 3 Page - Texas Instruments |
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ADS7828 Arkusz danych(HTML) 3 Page - Texas Instruments |
3 / 22 page ADS7828 3 SBAS181C www.ti.com ANALOG INPUT Full-Scale Input Scan Positive Input - Negative Input 0 VREF 0VREF V Absolute Input Range Positive Input –0.2 +VDD + 0.2 –0.2 +VDD + 0.2 V Negative Input –0.2 +0.2 –0.2 +0.2 V Capacitance 25 25 pF Leakage Current ±1 ±1 µA SYSTEM PERFORMANCE No Missing Codes 12 12 Bits Integral Linearity Error ±1.0 ±2 ±0.5 ±1LSB(1) Differential Linearity Error ±1.0 ±0.5 –1, +2 LSB Offset Error ±1.0 ±3 ±0.75 ±2 LSB Offset Error Match ±0.2 ±1 ±0.2 ±1 LSB Gain Error ±1.0 ±4 ±0.75 ±3 LSB Gain Error Match ±0.2 ±1 ±0.2 ±1 LSB Noise 33 33 µVRMS Power-Supply Rejection 82 82 dB SAMPLING DYNAMICS Throughput Frequency High Speed Mode: SCL = 3.4MHz 50 50 kHz Fast Mode: SCL = 400kHz 8 8 Standard Mode, SCL = 100kHz 2 2 kHz Conversion Time 66 µs AC ACCURACY Total Harmonic Distortion VIN = 2.5VPP at 10kHz –82 –82 dB (2) Signal-to-Ratio VIN = 2.5VPP at 10kHz 72 72 dB Signal-to-(Noise+Distortion) Ratio VIN = 2.5VPP at 10kHz 71 71 dB Spurious-Free Dynamic Range VIN = 2.5VPP at 10kHz 86 86 dB Isolation Channel-to-Channel 120 120 dB VOLTAGE REFERENCE OUTPUT Range 2.475 2.5 2.525 2.475 2.5 2.525 V Internal Reference Drift 15 15 ppm/ °C Output Impedance Internal Reference ON 110 110 Ω Internal Reference OFF 1 1 G Ω Quiescent Current Int. Ref. ON, SCL and SDA pulled HIGH 850 850 µA VOLTAGE REFERENCE INPUT Range 0.05 VDD 0.05 VDD V Resistance 11 G Ω Current Drain High Speed Mode: SCL= 3.4MHz 20 20 µA DIGITAL INPUT/OUTPUT Logic Family CMOS CMOS Logic Levels: VIH +VDD • 0.7 +VDD + 0.5 +VDD • 0.7 +VDD + 0.5 V VIL –0.3 +VDD • 0.3 –0.3 +VDD • 0.3 V VOL Min. 3mA Sink Current 0.4 0.4 V Input Leakage: IIH VIH = +VDD +0.5 10 10 µA IIL VIL = -0.3 –10 –10 µA Data Format Straight Straight Binary Binary ADS7828 HARDWARE ADDRESS 10010 10010 Binary POWER-SUPPLY REQUIREMENTS Power-Supply Voltage, +VDD Specified Performance 2.7 3.6 2.7 3.6 V Quiescent Current High Speed Mode: SCL = 3.4MHz 225 320 225 320 µA Fast Mode: SCL = 400kHz 100 100 µA Standard Mode, SCL = 100kHz 60 60 µA Power Dissipation High Speed Mode: SCL = 3.4MHz 675 1000 675 1000 µW Fast Mode: SCL = 400kHz 300 300 µW Standard Mode, SCL = 100kHz 180 180 µW Power-Down Mode High Speed Mode: SCL = 3.4MHz 70 70 µA w/Wrong Address Selected Fast Mode: SCL = 400kHz 25 25 µA Standard Mode, SCL = 100kHz 6 6 µA Full Power-Down SCL Pulled HIGH, SDA Pulled HIGH 400 3000 400 3000 nA TEMPERATURE RANGE Specified Performance –40 85 –40 85 °C ELECTRICAL CHARACTERISTICS: +2.7V At TA = –40°C to +85°C, +VDD = +2.7V, VREF = +2.5V, SCL Clock Frequency = 3.4MHz (High-Speed Mode), unless otherwise noted. ADS7828E ADS7828EB PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS NOTES: (1) LSB means Least Significant Bit. With VREF equal to 2.5V, 1LSB is 610µV. (2) THD measured out to the 9th-harmonic. |
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