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TLV2556IDWR Datasheet(PDF) 6 Page - Texas Instruments |
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TLV2556IDWR Datasheet(HTML) 6 Page - Texas Instruments |
6 / 39 page TLV2556 SLAS355B – DECEMBER 2001 – REVISED DECEMBER 2015 www.ti.com Electrical Characteristics (continued) over recommended operating free-air temperature range, when VCC = 5 V: VREF+ = 5 V, I/O CLOCK frequency = 15 MHz, when VCC = 2.7 V: VREF+ = 2.5 V, I/O CLOCK frequency = 10 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP(1) MAX UNIT VCC = 4.5 V 600 Zi Input impedance(2) Analog inputs Ω VCC = 2.7 V 500 Analog inputs 45 55 Ci Input capacitance pF Control inputs 5 15 (2) The switch resistance is very nonlinear and varies with input voltage and supply voltage. This is the worst case. 6.6 External Reference Specifications See (1) PARAMETER TEST CONDITIONS MIN TYP(2) MAX UNIT VCC = 4.5 V to 5.5 V –0.1 0 0.1 VREF– Reference input voltage, REF– V VCC = 2.7 V to 3.6 V –0.1 0 0.1 VCC = 4.5 V to 5.5 V 2 VCC VREF+ Reference input voltage, REF+ V VCC = 2.7 V to 3.6 V 2 VCC VCC = 4.5 V to 5.5 V 1.9 VCC External reference input voltage difference V (REF+ – REF–) VCC = 2.7 V to 3.6 V 1.9 VCC VCC = 4.5 V to 5.5 V 1 IREF External reference supply current CS = 0 V mA VCC = 2.7 V to 3.6 V 0.7 Static 1 M Ω VCC = 5 V During sampling or conversion 6 9 k Ω ZREF Reference input impedance Static 1 M Ω VCC = 2.7 V During sampling or conversion 6 9 k Ω (1) Add a 0.1- μF capacitor between REF+ and REF– pins when external reference is used. (2) All typical values are at VCC = 5 V, TA = 25°C. 6.7 Internal Reference Specifications See (1) (2) (3) PARAMETER TEST CONDITIONS MIN TYP(4) MAX UNIT VREF– Reference input voltage, REF– VCC = 2.7 V to 5.5 V, REF- = Analog GND 0 V Internal 4.096 V selected 3.95 4.065 4.25 VCC = 5.5 V Internal reference delta voltage, Internal 2.048 V selected 1.95 2.019 2.1 V (REF+ – REF–) VCC = 2.7 V Internal 2.048 V selected 1.95 2.019 2.1 VCC = 5 V 20 Internal reference start-up time With 10-µF load ms VCC = 2.7 V 20 Internal reference temperature coefficient VCC = 2.7 V to 5.5 V ±50 ppm/°C (1) Add a 0.1- μF capacitor between REF+ and REF– pins when external reference is used. (2) Add a 0.1- μF capacitor between REF+ and REF– pins. (3) REF- must be connected to analog GND (the ground of the ADC). (4) All typical values are at VCC = 5 V, TA = 25°C. 6 Submit Documentation Feedback Copyright © 2001–2015, Texas Instruments Incorporated Product Folder Links: TLV2556 |
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