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ADS8568SPM Datasheet(PDF) 10 Page - Texas Instruments |
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ADS8568SPM Datasheet(HTML) 10 Page - Texas Instruments |
10 / 57 page 10 ADS8528, ADS8548, ADS8568 SBAS543C – AUGUST 2011 – REVISED FEBRUARY 2016 www.ti.com Product Folder Links: ADS8528 ADS8548 ADS8568 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated (1) Reference output current is not limited internally. (2) Specified by design. 7.5 Electrical Characteristics: General All minimum and maximum specifications are at TA = –40°C to +125°C, specified supply voltage range, VREF = 2.5 V (internal), VIN = ±10 V, and fDATA = max, unless otherwise noted. Typical values are at TA = 25°C, HVDD = 15 V, HVSS = –15 V, AVDD = 5 V, and DVDD = 3.3 V. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ANALOG INPUT CHXX Bipolar full-scale range RANGE pin, RANGE bit = 0 –4 VREF 4 VREF V RANGE pin, RANGE bit = 1 –2 VREF 2 VREF Input capacitance Input range = ±4 VREF 10 pF Input range = ±2 VREF 20 Input leakage current No ongoing conversion –1 1 μA Aperture delay 5 ns Aperture delay matching Common CONVST for all channels 100 ps Aperture jitter 50 ps PSRR Power-supply rejection ratio At output code FFFFh, related to HVDD and HVSS –78 dB REFERENCE VOLTAGE OUTPUT (REFOUT) VREF Reference voltage 2.5-V operation, REFDAC = 3FFh 2.485 2.5 2.515 V 2.5-V operation, REFDAC = 3FFh at 25°C 2.496 2.5 2.504 3.0-V operation, REFDAC = 3FFh 2.985 3.0 3.015 3.0-V operation, REFDAC = 3FFh at 25°C 2.995 3.0 3.005 dVREF/dT Reference voltage drift ±10 ppm/°C PSRR Power-supply rejection ratio At output code FFFFh, related to AVDD –77 dB IREFOUT Output current At dc current –2 2 mA IREFSC Short-circuit current(1) 50 mA tREFON Turn-on settling time 10 ms External load capacitance At REF_xP, REF_xN pins 4.7 10 μF At REFIO pin 100 470 nF REFDAC Tuning range Internal reference output voltage range 0.2 VREF VREF V REFDAC resolution 10 Bits DNLDAC REFDAC differential nonlinearity –1 ±0.1 1 LSB INLDAC REFDAC integral nonlinearity –2 ±0.1 2 LSB VOSDAC REFDAC offset error VREF = 0.5 V (DAC = 0CDh) –4 ±0.65 4 LSB REFERENCE VOLTAGE INPUT (REFIN) VREFIN Reference input voltage 0.5 2.5 3.025 V Input resistance 100 M Ω Input capacitance 5 pF Reference input current 1 μA DIGITAL INPUTS(2) (CMOS with Schmitt-Trigger Logic Family) High-level input voltage 0.7 DVDD DVDD + 0.3 V Low-level input voltage DGND – 0.3 0.3 DVDD V Input current VI = DVDD to DGND –50 50 nA Input capacitance 5 pF DIGITAL OUTPUTS(2) Output capacitance 5 pF Load capacitance 30 pF High-impedance-state output current –50 50 nA Logic family CMOS VOH High-level output voltage IOH = 100 μA DVDD – 0.6 V VOL Low-level output voltage IOH = –100 μA DGND + 0.4 V |
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