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| 型號(hào)： | TC850ILWTR |
| 元件分類(lèi)： | ADC |
| 英文描述： | 1-CH 15-BIT MULTI-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 26/26頁(yè) |
| 文件大?。?/td> | 417K |
| 代理商： | TC850ILWTR |
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2006 Microchip Technology Inc.
DS21479C-page 9
TC850
4.0
ANALOG SECTION
DESCRIPTION
The TC850 analog section consists of an input buffer
amplifier, integrator amplifier, comparator and analog
switches. A simplified block diagram is shown in
4.1
Conversion Timing
Each conversion consists of three phases:
1.
Zero Integrator
2.
Signal Integrate
3.
Reference Integrate (or De-integrate)
Each conversion cycle requires 1280 internal clock
cycles (Figure 4-2).
FIGURE 4-1:
Analog Section Simplified Schematic
FIGURE 4-2:
Conversion Timing
RINT
INTIN
INTOUT
CINT
INT
Buffer*
BUFF
Integrator*
Comparator*
To Digital
Section
DE1
(+)
DE
Z1
DE
DE1
(+)
DE1
(-)
DE1
(-)
DE2
(+)
DE2
(-)
DE1
(+)
DE1
(-)
REF2+
+
-
+
–
+
–
TC850
CREF1+
CREF2-
CREF2
CREF1-
CREF2-
REF1+
REF1-
CREF1
IN+
IN-
ANALOG
COMMON
*Auto Zeroed Amplifiers
Conversion
Phase
Internal
Clock
Signal Integrate
Zero Integrator
Reference Integrate
1280 Clock Cyles
246
256
778
. . . . . . .
. . . . . . . . . . . .
. .
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