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ADS1220IRVAR Arkusz danych(PDF) 7 Page - Texas Instruments |
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ADS1220IRVAR Arkusz danych(HTML) 7 Page - Texas Instruments |
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7 / 71 page  ADS1220 www.ti.com SBAS501B – MAY 2013 – REVISED FEBRUARY 2015 Electrical Characteristics (continued) Minimum and maximum specifications apply from TA = –40°C to +125°C. Typical specifications are at TA = 25°C. All specifications are at AVDD = 3.3 V, AVSS = 0 V, DVDD = 3.3 V, PGA enabled, DR = 20 SPS, and external Vref = 2.5 V (unless otherwise noted). (1) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT EXCITATION CURRENT SOURCES (IDACs) Current settings 10, 50, 100, 250, 500, 1000, 1500 µA Compliance voltage All current settings AVDD – 0.9 V Accuracy All current settings, each IDAC –6% ±1% 6% Current match Between IDACs (not valid for 10-µA setting) ±0.3% Temperature drift Each IDAC (not valid for 10-µA setting) 50 ppm/°C Temperature drift matching Between IDACs (not valid for 10-µA setting) 10 ppm/°C TEMPERATURE SENSOR Conversion resolution 14 Bits Temperature resolution 0.03125 °C TA = 0°C to +75°C –0.5 ±0.25 0.5 °C Accuracy TA = –40°C to +125°C –1 ±0.5 1 °C Accuracy vs analog supply voltage 0.0625 0.25 °C/V LOW-SIDE POWER SWITCH RON On-resistance 3.5 5.5 Ω Current through switch 30 mA DIGITAL INPUTS/OUTPUTS VIH High-level input voltage 0.7 DVDD DVDD V VIL Low-level input voltage DGND 0.3 DVDD V VOH High-level output voltage IOH = 3 mA 0.8 DVDD V VOL Low-level output voltage IOL = 3 mA 0.2 DVDD V IH Input leakage, high VIH = 5.5 V –10 10 µA IL Input leakage, low VIL = DGND –10 10 µA POWER SUPPLY Power-down mode 0.1 3 µA Duty-cycle mode, PGA disabled 65 µA Duty-cycle mode, gain = 1 to 16 95 µA Duty-cycle mode, gain = 32 115 µA Duty-cycle mode, gain = 64, 128 135 µA Normal mode, PGA disabled 240 µA IAVDD Analog supply current(3) Normal mode, gain = 1 to 16 340 490 µA Normal mode, gain = 32 425 µA Normal mode, gain = 64, 128 510 µA Turbo mode, PGA disabled 360 µA Turbo mode, gain = 1 to 16 540 µA Turbo mode, gain = 32 715 µA Turbo mode, gain = 64, 128 890 µA Power-down mode 0.3 5 µA Duty-cycle mode 55 µA IDVDD Digital supply current(3) Normal mode 75 110 µA Turbo mode 95 µA Duty-cycle mode, PGA disabled 0.4 mW PD Power dissipation(3) Normal mode, gain = 1 to 16 1.4 mW Turbo mode, gain = 1 to 16 2.1 mW (3) Internal voltage reference selected, internal oscillator enabled, IDACs turned off, and continuous conversion mode. Analog supply current increases by 70 µA, typ (normal mode, turbo mode) when selecting an external reference. Analog supply current increases by 190 µA (typ) when enabling the IDACs (excludes the actual IDAC current). Copyright © 2013–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: ADS1220 |
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