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TLV2556IPW Datasheet(PDF) 6 Page - Texas Instruments |
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TLV2556IPW Datasheet(HTML) 6 Page - Texas Instruments |
6 / 38 page TLV2556 SLAS355A – DECEMBER 2001 – REVISED SEPTEMBER 2002 6 www.ti.com external reference specifications PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT Reference input voltage REF VCC = 4.5 V to 5.5 V –0.1 0 0.1 V Reference input voltage, REF– VCC = 2.7 V to 3.6 V –0.1 0 0.1 V Reference input voltage REF VCC = 4.5 V to 5.5 V 2 VCC V Reference input voltage, REF+ VCC = 2.7 V to 3.6 V 2 VCC V External reference input voltage difference, VCC = 4.5 V to 5.5 V 1.9 VCC V External reference in ut voltage difference, (REF+) – (REF–) VCC = 2.7 V to 3.6 V 1.9 VCC V External reference supply current CS at0V VCC = 4.5 V to 5.5 V 1 mA External reference supply current CS at 0 V VCC = 2.7 V to 3.6 V 0.7 mA V5 V Static 1 M Ω Reference input impedance VCC = 5 V During sampling/conversion 6 9 k Ω Reference input impedance V2 7 V Static 1 M Ω VCC = 2.7 V During sampling/conversion 6 9 k Ω † All typical values are at VCC = 5 V, TA = 25°C. NOTE: Add a 0.1- µF capacitor between REF+ and REF– pins when external reference is used. internal reference specifications PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT Reference input voltage, REF– VCC = 2.7 V to 5.5 V, REF– = Analog GND 0 V It l f dlt lt VCC = 5.5 V, Internal 4.096-Vref selected 3.95 4.065 4.25 Internal reference delta voltage, (REF+) – (REF–) VCC = 5.5 V, Internal 2.048-Vref selected 1.95 2.019 2.1 V (REF+) – (REF–) VCC = 2.7 V, Internal 2.048-Vref selected 1.95 2.019 2.1 V Internal reference start up time VCC = 5 V With 10 F load 20 ms Internal reference start-up time VCC = 2.7 V With 10- µF load 20 ms Internal reference temperature coefficient VCC = 2.7 V to 5.5 V ±50 PPM/ °C † All typical values are at VCC = 5 V, TA = 25°C. NOTE: When an internal reference is used, the following conditions are required: a) Add 0.1- µF and 10-µF capacitors between REF+ and REF– pins. b) REF– must be connected to analog GND (the ground pin of the ADC). |
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