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LM12454 Datasheet(PDF) 7 Page - Texas Instruments

Part No. LM12454
Description  LM12454/LM12458/LM12H458 12-Bit Sign Data Acquisition System with Self-Calibration
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM12454 Datasheet(HTML) 7 Page - Texas Instruments

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LM12454, LM12458, LM12H458
www.ti.com
SNAS079A – MAY 2004 – REVISED FEBRUARY 2006
Converter Characteristics
(1) (2) (3) (4) (continued)
The following specifications apply to the LM12454, LM12458, and LM12H458 for VA+ = VD+ = 5V, VREF+ = 5V, VREF− = 0V, 12-
bit + sign conversion mode, fCLK = 8.0 MHz (LM12H458) or fCLK = 5.0 MHz (LM12454/8), RS = 25Ω, source impedance for
VREF+ and VREF− ≤ 25Ω, fully-differential input with fixed 2.5V common-mode voltage, 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 (5)
Limits (6)
Units
Zero Error
VA+ = VD+ = 5V ±10%
±0.2
±1.75
LSB (max)
Power Supply
PSS
Full-Scale Error
VREF+ = 4.5V, VREF− = GND
±0.4
±2
LSB (max)
Sensitivity (11)
Linearity Error
±0.2
LSB
CREF
VREF+/VREF− Input Capacitance
85
pF
Selected Multiplexer Channel Input
CIN
75
pF
Capacitance
(11) Power Supply Sensitivity is measured after Auto-Zero and/or Auto-Calibration cycle has been completed with VA+ and VD+ at the
specified extremes.
Copyright © 2004–2006, Texas Instruments Incorporated
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Product Folder Links: LM12454 LM12458 LM12H458


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