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LM12L458 Datasheet(PDF) 29 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM12L458
Description  12-Bit Sign Data Acquisition System with Self-Calibration
Download  36 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM12L458 Datasheet(HTML) 29 Page - National Semiconductor (TI)

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6.0 Application Circuits (Continued)
Parts List:
Y1
HC49U, 8 MHz crystal
D1
1N4002
L1
33 µH
P1
DB37F; parallel connector
R1
10 M
Ω,5%, 14W
R2
2 k
Ω,5%, 14W
RN1
10 k
Ω, 6 resistor SIP, 5%, 18W
JP1, JP2 HX3, 3-pin jumper
S1
SW DIP-8; 8 SPST switches
C1–3, C6, C9–11,
C19, C22
0.1 µF, 50V, monolithic ceramic
C4
68 pF, 50V, ceramic disk
C5
15 pF, 50V, ceramic disk
C7, C21
100 µF, 25V, electrolytic
C8, C12, C20 10 µF, 35V, electrolytic
C13, C16
0.01 µF, 50V, monolithic ceramic
DS011711-24
Note: The layout utilizes a split ground plane. The analog ground plane is placed under all analog signals and U5 pins 1, 34–44. The remaining signals and
pins are placed over the digital ground. The single point ground connection is at U6, pin 2, and this is connected to the motherboard pin B1.
FIGURE 16. Schematic and Parts List for the LM12(H)454/8 Evaluation/Interface
Board for XT and AT Style Computers, Order Number LM12458EVAL
www.national.com
29


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