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ADS7822 bảng dữ liệu(PDF) 2 Page - Texas Instruments |
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ADS7822 bảng dữ liệu(HTML) 2 Page - Texas Instruments |
2 / 20 page ADS7822 2 SBAS062A www.ti.com SPECIFICATIONS: +VCC = +2.7V At –40 °C to +85°C, +V CC = +2.7V, VREF = +2.5V, fSAMPLE = 75kHz, fCLK = 16 • fSAMPLE, unless otherwise specified. ADS7822 ADS7822B ADS7822C PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS ANALOG INPUT Full-Scale Input Span +In – (–In) 0 VREF 0VREF 0VREF V Absolute Input Range +In –0.2 VCC +0.2 –0.2 VCC +0.2 –0.2 VCC +0.2 V –In –0.2 +1.0 –0.2 +1.0 –0.2 +1.0 V Capacitance 25 25 25 pF Leakage Current ±1 ±1 ±1 µA SYSTEM PERFORMANCE Resolution 12 12 12 Bits No Missing Codes 11 12 11 Bits Integral Linearity Error –2 ±0.5 +2 –1 ±0.5 +1 –0.75 ±0.25 +0.75 LSB(1) Differential Linearity Error –2 ±0.5 +2 –1 ±0.5 +1 –0.75 ±0.25 +0.75 LSB Offset Error –3+3 –3+3 –1+1 LSB Gain Error –3+3 –3+3 –1+1 LSB Noise 33 33 33 µVrms Power Supply Rejection 82 82 82 dB SAMPLING DYNAMICS Conversion Time 12 12 12 Clk Cycles Acquisition Time 1.5 1.5 1.5 Clk Cycles Throughput Rate 75 75 75 kHz DYNAMIC CHARACTERISTICS Total Harmonic Distortion VIN = 2.5Vp-p at 1kHz –82 –82 –82 dB SINAD VIN = 2.5Vp-p at 1kHz 71 71 71 dB Spurious Free Dynamic Range VIN = 2.5Vp-p at 1kHz 86 86 86 dB REFERENCE INPUT Voltage Range 0.05 VCC 0.05 VCC 0.05 VCC V Resistance CS = GND, fSAMPLE = 0Hz 55 5 G Ω CS = VCC 55 5 G Ω Current Drain At Code 710h 8 40 8 40 8 40 µA fSAMPLE = 7.5kHz 0.8 0.8 0.8 µA CS = VCC 0.001 3 0.001 3 0.001 3 µA DIGITAL INPUT/OUTPUT Logic Family CMOS CMOS CMOS Logic Levels: VIH IIH = +5µA 2.0 5.5 2.0 5.5 2.0 5.5 V VIL IIL = +5µA –0.3 0.8 –0.3 0.8 –0.3 0.8 V VOH IOH = –250µA 2.1 2.1 2.1 V VOL IOL = 250µA 0.4 0.4 0.4 V Data Format Straight Binary Straight Binary Straight Binary POWER SUPPLY REQUIREMENTS VCC Specified Performance 2.7 3.6 2.7 3.6 2.7 3.6 V See Notes 2 and 3 2.0 2.7 2.0 2.7 2.0 2.7 V See Note 3 3.6 5.25 3.6 5.25 3.6 5.25 V Quiescent Current 200 325 200 325 200 325 µA fSAMPLE = 7.5kHz(4,5) 20 20 20 µA fSAMPLE = 75kHz(5) 180 180 180 µA Power Down CS = VCC 33 3 µA TEMPERATURE RANGE Specified Performance –40 +85 –40 +85 –40 +85 °C NOTES: (1) LSB means Least Significant Bit. With VREF equal to +2.5V, one LSB is 0.61mV. (2) The maximum clock rate of the ADS7822 is less than 1.2MHz in this power supply range. (3) See the Typical Performance Curves for more information. (4) fCLK = 1.2MHz, CS = VCC for 145 clock cycles out of every 160. (5) See the Power Dissipation section for more information regarding lower sample rates. |
Số phần tương tự - ADS7822 |
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Mô tả tương tự - ADS7822 |
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