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TC534 数据表(PDF) 2 Page - Microchip Technology

部件名 TC534
功能描述  5V Precision Data Acquisition Subsystems
Download  22 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

TC534 数据表(HTML) 2 Page - Microchip Technology

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TC530/TC534
DS21433B-page 2
© 2002 Microchip Technology Inc.
General Description
The TC530/TC534 are serial analog data acquisition
subsystems ideal for high precision measurements (up
to 17-bits plus sign). The TC530 consists of a dual
slope integrating
A/D converter, negative power sup-
ply generator and 3 wire serial interface port. The
TC534 is identical to the TC530, but adds a four chan-
nel differential input multiplexer. Key A/D converter
operating parameters (Auto Zero and Integration time)
are
programmable,
allowing
the
user
to
trade
conversion time for resolution.
Data conversion is initiated when the RESET input is
brought low. After conversion, data is loaded into the
output shift register and EOC is asserted, indicating
new data is available. The converted data (plus Over-
range and polarity bits) is held in the output shift regis-
ter until read by the processor or until the next
conversion is completed, allowing the user to access
data at any time.
The TC530/TC534 timebase can be derived from an
external crystal of 2MHz (max) or from an external fre-
quency source. The TC530/TC534 requires a single 5V
power supply and features a -5V, 10mA output which
can be used to supply negative bias to other
components in the system.
Typical Application
A0 A1
OSCIN
R/W
DIN
DOUT
DCLK
OSCOUT
OSC
RESET
CAP+
CAP–
CAZ
TC530
TC534
CREF
RINT
CINT
TC534
(Only)
(TC530 Only)
DC-TO-DC
Converter
State
Machine
Serial Port
Negative
Supply Output
Oscillator
(÷ 4)
Dual Slope A/D Converter
.01
µF
0.01
µF
Optional
Power-On
Reset Cap
100k
+5V
DIF.
MUX
(TC534
Only)
AB
CMPTR
BUF
INT
CAZ
ACOM
VDD
VDD
VDD
VDD
VSS
MCP1525
VREF-
VREF+
VIN-
VIN+
EOC
CH2+
CH3+
CH1+
CH4+
CH4-
CH3-
CH2-
CH1-
IN+
IN-
CREF-
CREF+


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