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LM12454 Datasheet(PDF) 12 Page - Texas Instruments |
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LM12454 Datasheet(HTML) 12 Page - Texas Instruments |
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12 / 45 page  LM12454, LM12458, LM12H458 SNAS079A – MAY 2004 – REVISED FEBRUARY 2006 www.ti.com Digital Characteristics (1) (2) The following specifications apply to the LM12454, LM12458, and LM12H458 for VA+ = VD+ = 5V, unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Typical Limits Symbol Parameter Conditions Units (3) (4) VIN(1) Logical “1” Input Voltage VA+ = VD+ = 5.5V 2.0 V (min) VIN(0) Logical “0” Input Voltage VA+ = VD+ = 4.5V 0.8 V (max) IIN(1) Logical “1” Input Current VIN = 5V 0.005 1.0 μA (max) IIN(0) Logical “0” Input Current VIN = 0V −0.005 −1.0 μA (max) CIN D0–D15 Input Capacitance 6 pF VA+ = VD+ = 4.5V VOUT(1) Logical “1” Output Voltage IOUT = −360 μA 2.4 V (min) IOUT = −10 μA 4.25 V (min) VA+ = VD+ = 4.5V VOUT(0) Logical “0” Output Voltage 0.4 V (max) IOUT = 1.6 mA VOUT = 0V −0.01 −3.0 μA (max) IOUT TRI-STATE® Output Leakage Current VOUT = 5V 0.01 3.0 μA (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) Typical figures are at TA = 25°C and represent most likely parametric norm. (4) Limits are to AOQL (Average Output Quality Level). 12 Submit Documentation Feedback Copyright © 2004–2006, Texas Instruments Incorporated Product Folder Links: LM12454 LM12458 LM12H458 |
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