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ADS7834PB Datasheet(PDF) 3 Page - Texas Instruments |
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ADS7834PB Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 22 page  ADS7834 3 SBAS098A www.ti.com SPECIFICATIONS At TA = –40°C to +85°C, +VCC = +5V, fSAMPLE = 500kHz, fCLK = 16 • fSAMPLE, internal reference, unless otherwise specified. ADS7834P, E ADS7834PB, EB PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS ANALOG INPUT Full-Scale Input Span(1) +IN – (–IN) 0 VREF ✻✻ V Absolute Input Range +IN –0.2 VREF +0.2 ✻✻ V –IN –0.2 +0.2 ✻✻ V Capacitance 25 ✻ pF Leakage Current 1 ✻ µA SYSTEM PERFORMANCE Resolution 12 ✻ Bits No Missing Codes 12 ✻ Bits Integral Linearity Error ±1 ±2 ±0.5 ±1 LSB(2) Differential Linearity Error ±0.8 ±0.5 ±1LSB Offset Error ±2 ±5 ±1 ✻ LSB Gain Error(3) 25 °C ±12 ±30 ±7 ±15 LSB –40 °C to +85°C ±50 ±35 LSB Common-Mode Rejection DC, 0.2Vp-p 70 ✻ dB 1MHz, 0.2Vp-p 50 ✻ dB Noise 60 ✻ µVrms Power Supply Rejection Worst Case ∆, +V CC = 5V ±5% 1.2 ✻ LSB SAMPLING DYNAMICS Conversion Time 1.625 ✻ µs Acquisition Time 0.350 ✻ µs Throughput Rate 500 ✻ kHz Aperture Delay 5 ✻ ns Aperture Jitter 30 ✻ ps Step Response 350 ✻ ns DYNAMIC CHARACTERISTICS Signal-to-Noise Ratio VIN = 5Vp-p at 10kHz 72 ✻ dB Total Harmonic Distortion(4) VIN = 5Vp-p at 10kHz –78 –72 –82 –75 dB Signal-to-(Noise+Distortion) VIN = 5Vp-p at 10kHz 68 70 70 72 dB Spurious Free Dynamic Range VIN = 5Vp-p at 10kHz 72 78 75 82 dB Usable Bandwidth SNR > 68dB 350 ✻ kHz REFERENCE OUTPUT Voltage IOUT = 0 2.475 2.50 2.525 2.48 ✻ 2.52 V Source Current(5) Static Load 50 ✻ µA Drift IOUT = 0 20 ✻ ppm / °C Line Regulation 4.75V ≤ V CC ≤ 5.25V 0.6 ✻ mV REFERENCE INPUT Range 2.0 2.55 ✻✻ V Resistance(6) to Internal Reference Voltage 10 ✻✻ ✻ k Ω DIGITAL INPUT/OUTPUT Logic Family CMOS ✻ Logic Levels: VIH |IIH| ≤ +5µA 3.0 VCC +0.3 ✻✻ V VIL |IIL| ≤ +5µA –0.3 0.8 ✻✻ V VOH IOH = –500µA 3.5 ✻✻ V VOL IOL = 500µA 0.4 ✻✻ V Data Format Straight Binary ✻ POWER SUPPLY REQUIREMENT +VCC Specified Performance 4.75 5.25 ✻✻ V Quiescent Current fSAMPLE = 500kHz 2.2 ✻ mA Power-Down 0.5 ✻ mA Power Dissipation fSAMPLE = 500kHz 11 20 ✻✻ mW Power-Down 2.5 ✻ mW TEMPERATURE RANGE Specified Performance –40 +85 ✻✻ °C ✻ Specifications same as ADS7834P,E. NOTES: (1) Ideal input span, does not include gain or offset error. (2) LSB means Least Significant Bit, with VREF equal to +2.5V, one LSB is 610µV. (3) Measured relative to an ideal, full-scale input (+IN – (–IN)) of 2.499V. Thus, gain error includes the error of the internal voltage reference. (4) Calculated on the first nine harmonics of the input frequency. (5) 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. (6) Can vary ±30%. |
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