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ADS7842EG4 Arkusz danych(PDF) 4 Page - Texas Instruments |
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ADS7842EG4 Arkusz danych(HTML) 4 Page - Texas Instruments |
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4 / 20 page  ADS7842 SBAS103C 4 www.ti.com ELECTRICAL CHARACTERISTICS: +2.7V At TA = –40°C to +85°C, +VCC = +2.7V, VREF = +2.5V, fSAMPLE = 125kHz, and fCLK = 16 • fSAMPLE = 2MHz, unless otherwise noted. ADS7842E ADS7842EB ✻ Same specifications as ADS7842E. NOTES: (1) LSB means Least Significant Bit. With VREF equal to +2.5V, one LSB is 610mV. (2) First five harmonics of the test frequency. (3) Power-down mode at end of conversion when WR, CS, and BUSY conditions have all been met. Refer to Table III of this data sheet. PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS RESOLUTION 12 ✻ Bits ANALOG INPUT Full-Scale Input Span 0 VREF ✻✻ V Capacitance 25 ✻ pF Leakage Current ±1 ✻ µA SYSTEM PERFORMANCE No Missing Codes 12 ✻ Bits Integral Linearity Error ±2 ±1 LSB(1) Differential Linearity Error ±0.8 ±0.5 ±1LSB Offset Error ±5 ✻ LSB Offset Error Match 0.15 1.0 ✻✻ LSB Gain Error ±4 ±3LSB Gain Error Match 0.1 1.0 ✻✻ LSB Noise 30 ✻ µVrms Power-Supply Rejection 70 ✻ dB SAMPLING DYNAMICS Conversion Time 12 ✻ Clk Cycles Acquisition Time 3 ✻ Clk Cycles Throughput Rate 125 ✻ kHz Multiplexer Settling Time 500 ✻ ns Aperture Delay 30 ✻ ns Aperture Jitter 100 ✻ ps DYNAMIC CHARACTERISTICS Total Harmonic Distortion(2) 3.6V ≥ V CC ≥ 3.0V, VIN = 2.5Vp-p –77 –70 –79 –74 dB at 10kHz 3.0V > VCC ≥ 2.7V, VIN = 2.5Vp-p –77 –70 ✻✻ dB at 10kHz Signal-to-(Noise + Distortion) 3.6V ≥ V CC ≥ 3.0V, VIN = 2.5Vp-p 68 71 70 72 dB at 10kHz 3.0V > VCC ≥ 2.7V, VIN = 2.5Vp-p 68 71 ✻✻ dB at 10kHz Spurious-Free Dynamic Range 3.6V ≥ V CC ≥ 3.0V, VIN = 2.5Vp-p 72 78 76 80 dB at 10kHz 3.0V > VCC ≥ 2.7V, VIN = 2.5Vp-p 72 78 ✻✻ dB at 10kHz Channel-to-Channel Isolation VIN = 2.5Vp-p at 50kHz 100 ✻ dB REFERENCE INPUT Range 0.1 +VCC ✻✻ V Resistance DCLK Static 5 ✻ G Ω Input Current 13 40 ✻✻ µA fSAMPLE = 12.5kHz 2.5 ✻ µA DCLK Static 0.001 3 ✻✻ µA DIGITAL INPUT/OUTPUT Logic Family CMOS ✻ Logic Levels VIH | IIH | ≤ +5µA+VCC • 0.7 5.5 ✻✻ V VIL | IIL | ≤ +5µA –0.3 +0.8 ✻✻ V VOH IOH = –250µA+VCC • 0.8 ✻ V VOL IOL = 250µA 0.4 ✻ V Data Format Straight Binary ✻ External Clock 0.2 2 ✻✻ MHz POWER-SUPPLY REQUIREMENTS +VCC Specified Performance 2.7 3.6 ✻✻ V Quiescent Current 280 650 ✻✻ µA fSAMPLE = 12.5kHz 220 ✻ µA Power-Down Mode(3), CS = +VCC 3 ✻ µA Power Dissipation 1.8 ✻ mW TEMPERATURE RANGE Specified Performance –40 +85 ✻✻ °C |
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