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THS1040_15 Datasheet, PDF (18/33 Pages) Texas Instruments – CMOS ANALOG-TO-DIGITAL CONVERTER | |||
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THS1040
Not Recommended For New Designs
SLAS290C â OCTOBER 2001 â REVISED OCTOBER 2004
PRINCIPLES OF OPERATION
internal reference mode (MODE = AVDD or AVDD/2) (continued)
+FS
AIN+
âFS
+FS
AINâ
âFS
AIN+
AVDD
AVDD or 2
MODE
AINâ
REFSENSE
0.1 µF
0.1 µF
REFT
10 µF
0.1 µF
REFB
VREF
BIASREF
1 V (Output)
VMID if MODE = AVDD
AVDD
High-Impedance if MODE = 2
Figure 23. Internal Reference Mode, 1-V Reference Span
+FS
VM
âFS
DC SOURCE = VM
VM
+
_
AIN+
AINâ
AVDD
2
or AVDD
MODE
0.1 µF
REFT
VREF
0.5 V (Output)
0.1 µF
10 µF
0.1 µF
REFB REFSENSE
Figure 24. Internal Reference Mode, 0.5-V Reference Span, Single-Ended Input
18
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