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TC520A Datasheet(PDF) 1 Page - Microchip Technology

Part No. TC520A
Description  Serial Interface Adapter for TC500 A/D Converter Family
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Maker  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
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TC520A Datasheet(HTML) 1 Page - Microchip Technology

 
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© 2002 Microchip Technology Inc.
DS21431B-page 1
TC520A
Features
• Converts TC500/TC500A/TC510/TC514 to Serial
Operation
• Programmable Conversion Rate and Resolution for
Maximum Flexibility
• Supports up to 17-Bits of Accuracy Plus Polarity Bit
• Low Power Operation: Typically 7.5m
• 14-Pin PDIP or 16-Pin SOIC Packages
• Polled or Interrupt Mode Operation
Applications
• Computer Peripheral Interface
• Portable Instruments
• Data Acquisition System Interface
Device Selection Table
Package Type
General Description
The TC520A serial interface adapter provides logic
control for Microchip's TC500/TC500A/TC510/TC514
family of dual slope, integrating A/D converters. It
directly manages TC500 converter phase control sig-
nals A, B and CMPTR, thereby reducing host
processor task loading and software complexity. Com-
munication with the TC520A is accomplished over a 3
wire serial port. Key converter operating parameters
are programmable for complete user flexibility. Data
conversion is initiated when the CE input is brought
low. The converted data (plus overrange and polarity
bits) are held in an 18-bit shift register until read by the
processor or until the next conversion is completed.
Data may be clocked out of the TC520A at any time,
and at any rate, the user prefers. A Data Valid (DV)out-
put is driven active at the start of each conversion
cycle, indicating the 18-bit shift register update has just
been completed. This signal may be polled by the pro-
cessor or can be used as data ready interrupt. The
TC520A timebase can be derived from an external fre-
quency source of up to 6MHz or can operate from its
own external crystal. It requires a single 5V logic supply
and dissipates less than 7.5m
Ω.
Part Number
Package
Temperature Range
TC520ACOE 16-Pin SOIC (Wide)
0
°Cto +70°C
TC520ACPD
14-Pin PDIP
0
°Cto +70°C
B
CMPTR
DGND
VDD
A
DIN
OSCOUT
DCLK
OSCIN
DOUT
114
213
312
411
510
69
78
TC520A
CE
DV
LOAD
READ
14-Pin PDIP
16-Pin SOIC
8
1
2
3
4
5
6
7
TC520A
DIN
B
14
13
12
11
10
9
15
16
LOAD
DV
CE
DCLK
A
DOUT
READ
N/C
CMPTR
DGND
VDD
OSCOUT
OSCIN
N/C
Serial Interface Adapter for TC500 A/D Converter Family


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