THS1041_15 Datasheet, PDF (19/42 Pages) Texas Instruments – 10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP

THS1041
SLAS289C − OCTOBER 2001 − REVISED OCTOBER 2004
PRINCIPLES OF OPERATION
internal reference mode (MODE = AV_DD or AV_DD/2) (continued)
+FS
AIN+
−FS
+FS
AIN−
−FS
AIN+
AVDD
AVDD or ₂
MODE
AIN−
REFSENSE
0.1 µF
0.1 µF
REFT
VREF
10 µF
0.1 µF
CLAMPOUT
REFB
1 V (Output)
VMID if MODE = AVDD
VCLAMP if MODE =
AVDD
2
Figure 28. Internal Reference Mode, 1-V Reference Span
+FS
VM
−FS
DC SOURCE = VM
VM
+
_
AIN+
AIN−
MODE
AVDD
2
or AVDD
0.1 µF
REFT
VREF
0.5 V (Output)
0.1 µF
10 µF
0.1 µF
REFB REFSENSE
Figure 29. Internal Reference Mode, 0.5-V Reference Span, Single-Ended Input
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