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LM12454 Datasheet(PDF) 10 Page - Texas Instruments |
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LM12454 Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 45 page  LM12454, LM12458, LM12H458 SNAS079A – MAY 2004 – REVISED FEBRUARY 2006 www.ti.com DC Characteristics (1) (2) (3) The following specifications apply to the LM12454, LM12458, and LM12H458 for VA+ = VD+ = 5V, VREF+ = 5V, VREF− = 0V, fCLK = 8.0 MHz (LM12H454/8) or fCLK = 5.0 MHz (LM12458), and minimum acquisition time unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Typical (4) Limits (5) Units CS = “1” ID+ VD+ Supply Current LM12454/8 0.55 1.0 mA (max) LM12H458 0.55 1.2 mA (max) CS = “1” IA+ VA+ Supply Current LM12454/8 3.1 5.0 mA (max) LM12H458 3.1 5.5 mA (max) Stand-By Supply Current (ID+) + (IA+) Clock Stopped 10 μA (max) IST [Power-Down Mode Selected] 8 MHz Clock 40 μA (max) VA+ = 5.5V ON-Channel = 5.5V, 0.1 0.3 μA (max) Multiplexer ON-Channel Leakage OFF-Channel = 0V Current ON-Channel = 0V 0.1 0.3 μA (max) OFF-Channel = 5.5V VA+ = 5.5V ON-Channel = 5.5V 0.1 0.3 μA (max) Multiplexer OFF-Channel Leakage OFF-Channel = 0V Current ON-Channel = 0V 0.3 0.1 μA (max) OFF-Channel = 5.5V LM12454 VIN = 5V 800 1500 Ω(max) RON Multiplexer ON-Resistance VIN = 2.5V 850 1500 Ω(max) VIN = 0V 760 1500 Ω(max) LM12454 VIN = 5V ±1.0% ±3.0% (max) Multiplexer Channel-to-Channel RON matching VIN = 2.5V ±1.0% ±3.0% (max) VIN = 0V ±1.0% ±3.0% (max) (1) Two on-chip diodes are tied to each analog input through a series resistor, as shown below. Input voltage magnitude up to 5V above VA+ or 5V below GND will not damage the LM12454 or the LM12(H)458. However, errors in the A/D conversion can occur if these diodes are forward biased by more than 100 mV. As an example, if VA+ is 4.5 VDC, full-scale input voltage must be ≤4.6 VDC to ensure accurate conversions. (2) VA+ and VD+ must be connected together to the same power supply voltage and bypassed with separate capacitors at each V + pin to assure conversion/comparison accuracy. (3) Accuracy is guaranteed when operating at fCLK = 5 MHz for the LM12454/8 and fCLK = 8 MHz for the LM12H458. (4) Typical figures are at TA = 25°C and represent most likely parametric norm. (5) Limits are to AOQL (Average Output Quality Level). 10 Submit Documentation Feedback Copyright © 2004–2006, Texas Instruments Incorporated Product Folder Links: LM12454 LM12458 LM12H458 |
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