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ADS8634SRGER bảng dữ liệu(PDF) 3 Page - Texas Instruments |
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ADS8634SRGER bảng dữ liệu(HTML) 3 Page - Texas Instruments |
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3 / 76 page  ADS8634 ADS8638 www.ti.com SBAS541A – MAY 2011 – REVISED AUGUST 2011 ELECTRICAL CHARACTERISTICS: ADS8634, ADS8638 Minimum/maximum specifications at TA = –40°C to +125°C, fSAMPLE = 1MSPS, HVDD = 10V to 15V, HVSS = –10V to –15V, AVDD = 4.75V to 5.25V, DVDD = 2.7V to 3.6V, and VREF = 2.5V, unless otherwise noted. Typical specifications at +25°C, fSAMPLE = 1MHz, HVDD = 10V, HVSS = –10V, AVDD = 3.3V, DVDD = 3.3V, and VREF = 2.5V, unless otherwise noted. ADS8634, ADS8638 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT ±2.5 V Bipolar ranges, VREF = 2.5V ±5 V Full-scale input span(1) ±10 V 0 to 5 V Unipolar ranges, VREF = 2.5V 0 to 10 V AINx absolute input range HVSS HVDD V AINGND absolute input range –0.2 0.2 V Input capacitance 8 pF Input leakage current At +125 °C 200 nA SYSTEM PERFORMANCE Resolution 12 Bits No missing codes 12 Bits Integral linearity –1.5 +0.9/ –0.9 1.5 LSB(2) Differential linearity –1.0 +0.9/ –0.5 1.6 LSB Offset error(3) –3 ±0.8 3 LSB ppmFS/ °C( Offset error drift 0.75 4) Gain error(5) –8 ±2 8 LSB Gain error drift 1.2 ppm/ °C Noise 0.33 LSB At FFCh output code with Power-supply rejection –87 dB 250mVPP and 480Hz ripple on AVDD Crosstalk on channel 0 with channel 0 permanently selected, Isolation 2kHz full-scale sine wave on channel 1, all other channels –110 dB crosstalk grounded Crosstalk Crosstalk on channel 0, 2kHz full-scale sine wave on channel 1, Memory crosstalk all other channels grounded, device scans channel 0 and –81 dB channel 1 alternately SAMPLING DYNAMICS Conversion time At 20MHz SCLK, DVDD = 2.7V to 5.25V 750 ns Acquisition time AVDD = 2.7V to 5.25V 250 ns Maximum throughput rate At 20MHz SCLK, DVDD = 2.7V to 5.25V 1 1 MSPS Aperture delay 13 ns Step response 250 ns (1) Ideal input span; does not include gain or offset error. (2) LSB means least significant bit. (3) Measured relative to an ideal full-scale input. (4) ppmFS/ °C is drift measured in parts per million of full-scale range per degree centigrade. (5) Does not include reference drift. Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): ADS8634 ADS8638 |
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