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ADS8678IDBT bảng dữ liệu(PDF) 6 Page - Texas Instruments |
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ADS8678IDBT bảng dữ liệu(HTML) 6 Page - Texas Instruments |
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6 / 79 page  ADS8674, ADS8678 SBAS627 – JULY 2015 www.ti.com 7.5 Electrical Characteristics Minimum and maximum specifications are at TA = –40°C to 125°C. Typical specifications are at TA = 25°C. AVDD = 5 V, DVDD = 3 V, VREF = 4.096 V (internal), and fSAMPLE = 500 kSPS, unless otherwise noted. TEST PARAMETER TEST CONDITIONS MIN TYP MAX UNIT LEVEL(1) ANALOG INPUTS Input range = ±2.5 × VREF –2.5 × VREF 2.5 × VREF A Input range = ±1.25 × VREF –1.25 × VREF 1.25 × VREF A Input range = ±0.625 × VREF –0.625 × VREF 0.625 × VREF A –0.3125 × Input range = ±0.3125 × VREF 0.3125 × VREF A VREF Full-scale input span(2) –0.15625 × 0.15625 × V (AIN_nP to AIN_nGND) Input range = ±0.15625 × VREF A VREF VREF Input range = 2.5 × VREF 0 2.5 × VREF A Input range = 1.25 × VREF 0 1.25 × VREF A Input range = 0.625 × VREF 0 0.625 × VREF A Input range = 0.3125 × VREF 0 0.3125 × VREF A Input range = ±2.5 × VREF –2.5 × VREF 2.5 × VREF A Input range = ±1.25 × VREF –1.25 × VREF 1.25 × VREF A Input range = ±0.625 × VREF –0.625 × VREF 0.625 × VREF A –0.3125 × Input range = ±0.3125 × VREF 0.3125 × VREF A VREF Operating input range, AIN_nP –0.15625 × 0.15625 × V positive input Input range = ±0.15625 × VREF A VREF VREF Input range = 2.5 × VREF 0 2.5 × VREF A Input range = 1.25 × VREF 0 1.25 × VREF A Input range = 0.625 × VREF 0 0.625 × VREF A Input range = 0.3125 × VREF 0 0.3125 × VREF A Operating input range, AIN_nGND All input ranges –0.1 0 0.1 V B negative input At TA = 25°C, zi Input impedance 0.85 1 1.15 M Ω B all input ranges Input impedance drift All input ranges 7 25 ppm/°C B VIN – 2.25 With voltage at AIN_nP pin = VIN, ———— A input range = ±2.5 × VREF RIN VIN – 2.00 With voltage at AIN_nP pin = VIN, ———— A input range = ±1.25 × VREF RIN With voltage at AIN_nP pin = VIN, VIN – 1.60 IIkg(in) Input leakage current input ranges = ±0.625 × VREF; ———— µA A ±0.3125 × VREF; ±0.15625 × VREF RIN VIN – 2.50 With voltage at AIN_nP pin = VIN, ———— A input range = 2.5 × VREF RIN With voltage at AIN_nP pin = VIN, VIN – 2.50 input range = 1.25 × VREF; 0.625 × ———— A VREF; 0.3125 × VREF RIN INPUT OVERVOLTAGE PROTECTION AVDD = 5 V or offers low –20 20 B impedance < 30 k Ω, all input ranges VOVP Overvoltage protection voltage V AVDD = floating with impedance –11 11 B > 30 k Ω, all input ranges (1) Test Levels: (A) Tested at final test. Over temperature limits are set by characterization and simulation. (B) Limits set by characterization and simulation, across temperature range. (C) Typical value only for information, provided by design simulation. (2) Ideal input span, does not include gain or offset error. 6 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS8674 ADS8678 |
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