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LM12454 Datasheet(PDF) 9 Page - Texas Instruments

Part # 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) 9 Page - Texas Instruments

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LM12454, LM12458, LM12H458
www.ti.com
SNAS079A – MAY 2004 – REVISED FEBRUARY 2006
Converter AC 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
VIN = ±5V
fIN = 1 kHz
−85.8
dB
DTHD
Differential Total Harmonic Distortion
fIN = 20 kHz
−79.9
dB
fIN = 40 kHz
−72.9
dB
VIN = 5 Vp-p
fIN = 1 kHz
−80.3
dB
Single-Ended Total Harmonic
SETHD
Distortion
fIN = 20 kHz
−75.6
dB
fIN = 40 kHz
−72.8
dB
VIN = ±5V
fIN = 1 kHz
12.6
Bits
DENOB
Differential Effective Number of Bits
fIN = 20 kHz
12.2
Bits
fIN = 40 kHz
12.1
Bits
VIN = 5 Vp-p
fIN = 1 kHz
11.3
Bits
SEENOB
Single-Ended Effective Number of Bits
fIN = 20 kHz
11.2
Bits
fIN = 40 kHz
10.8
Bits
VIN = ±5V
fIN = 1 kHz
87.2
dB
Differential Spurious Free Dynamic
DSFDR
Range
fIN = 20 kHz
78.9
dB
fIN = 40 kHz
72.8
dB
VIN = 5 VP-P, fIN = 40 kHz,
−76
dB
LM12454 MUXOUT Only
Multiplexer Channel-to-Channel
Crosstalk
VIN = 5 VP-P, fIN = 40 kHz,
−78
dB
LM12(H)458 MUX plus Converter
tPU
Power-Up Time
10
ms
tWU
Wake-Up Time
10
ms
Copyright © 2004–2006, Texas Instruments Incorporated
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Product Folder Links: LM12454 LM12458 LM12H458


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