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ADS7852 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS7852 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 18 page  ADS7852 SBAS111C 3 ELECTRICAL CHARACTERISTICS At TA = –40°C to +85°C, fS = 500kHz, fCLK = 16 • fS, and VSS = +5V, using internal reference, unless otherwise specified. ADS7852Y ADS7852YB PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS RESOLUTION 12 ✻ Bits ANALOG INPUT Input Voltage Range 0 5 ✻✻ V Input Impedance 5M ✻ Ω Input Capacitance 15 ✻ pF Input Leakage Current ±1 ✻ µA DC ACCURACY No Missing Codes 12 ✻ Bits Integral Linearity Error ±2 ±1 LSB(1) Differential Linearity Error ±1 ±0.5 ±1 LSB Offset Error ±2 ±5 ±1 ✻ LSB Offset Error Drift ±4 ✻ ppm/ °C Offset Error Match ±1 ✻ LSB Gain Error(1) Ext Ref = 2.5000V ±15 ±10 LSB Gain Error Int Ref ±40 ±25 LSB Gain Error Drift ±25 ✻ ppm/ °C Gain Error Match ±1 ✻ LSB Noise 150 ✻ µVrms Power Supply Rejection Ratio Worst-Case ∆, +V SS = 5V ±5% 1.2 ✻ LSB SAMPLING DYNAMICS Conversion Time 13.5 ✻ Clk Cycles Acquisition Time 1.5 ✻ Clk Cycles Throughput Rate 500 ✻ kHz Multiplexer Settling Time 500 ✻ ns Aperture Delay 5 ✻ ns Aperture Jitter 30 ✻ ps AC ACCURACY Signal-to-Noise Ratio 72 ✻ dB Total Harmonic Distortion(3) VIN = 5Vp-p at 50kHz –74 –72 –77 –76 dB Signal-to-(Noise+Distortion) VIN = 5Vp-p at 50kHz 68 70 71 72 dB Spurious Free Dynamic Range VIN = 5Vp-p at 50kHz 76 74 78 77 dB Channel-to-Channel Isolation VIN = 5Vp-p at 50kHz 95 ✻ dB REFERENCE OUTPUT Internal Reference Voltage 2.48 2.50 2.52 ✻✻ ✻ V Internal Reference Drift 30 ✻ ppm/ °C Input Impedance CS = GND 5 ✻ G Ω CS = VSS 5 ✻ G Ω Source Current(4) Static Load 50 ✻ µA REFERENCE INPUT Range 2.0 2.55 ✻✻ V Resistance(5) to Internal Reference Voltage 10 ✻ k Ω DIGITAL INPUT/OUTPUT Logic Family CMOS ✻ Logic Levels: VIH IIH = +5µA3 +VSS + 0.3 ✻✻ V VIL IIL = +5µA –0.3 0.8 ✻✻ V VOH IOH = 250µA 3.5 ✻ V VOL IOL = 250µA 0.4 ✻ V Data Format Straight Binary ✻ POWER SUPPLY REQUIREMENT +VSS Specified Performance 4.75 5.25 ✻✻ V Quiescent Current 2.6 3.5 ✻✻ mA Normal Power 13 17.5 ✻✻ mW Nap Mode Current(6) 600 800 ✻✻ µA Sleep Mode Current(6) 10 30 ✻✻ µA TEMPERATURE RANGE Specified Performance –40 +85 ✻✻ °C Storage –65 +150 ✻✻ °C ✻ Specifications same as ADS7852Y. NOTES: (1) LSB means Least Significant Bit, with VREF equal to +2.5V, one LSB is 1.22mV. (2) Measured relative to an ideal, full-scale input of 4.999V. Thus, gain error includes the error of the internal voltage reference. (3) Calculated on the first nine harmonics of the input frequency. (4) If the internal reference is required to source current to an external load, the reference voltage will change due to the internal 10k Ω resistor. (5) Can vary ±30%. (6) See Timing Characteristics for further detail. |
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