TC534CPJ View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'TC534CPJ' PDF : 28 Pages View PDF
Obsolete Device
TC530/TC534
5V Precision Data Acquisition Subsystems
Features
• Precision (up to 17-Bits) A/D Converter
• 3-Wire Serial Port
• Flexible: User Can Trade Off Conversion Speed
For Resolution
• Single Supply Operation
• -5V Output Pin
• 4 Input, Differential Analog MUX (TC530)
• Automatic Input Polarity and Overrange Detection
• Low Operating Current: 5mA Max
• Wide Analog Input Range: ±4.2V Max
• Cost Effective
Applications
• Precision Analog Signal Processor
• Precision Sensor Interface
• High Accuracy DC Measurements
General Description
The TC530/TC534 are serial analog data acquisition
subsystems ideal for high precision measurements (up
to 17-bits plus sign). The TC534 consists of a dual
slope integrating A/D converter, negative power
supply generator and 3 wire serial interface port. The
TC530 is identical to the TC534, but adds a four
channel differential input multiplexer. Key A/D
converter operating parameters (Auto Zero and Inte-
gration 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
register 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
VDD MCP1525
(TC530 Only) VIN-
VIN+
TC534
(Only)
CH1+
CH1-
CH2+
CH2-
CH3+
CH3-
CH4+
CH4-
+5V
VDD
RINT
CINT
CAZ
CREF
100 kΩ
.01 µF
DIF.
MUX
(TC534
Only)
BUF CAZ
IN+
IN-
INT CREF+ CREF-
VREF+
Dual Slope A/D Converter
CMPTR A B
VREF- ACOM
TC530
TC534
VDD
DC-TO-DC
Converter
State
Machine
Oscillator
(÷ 4)
Serial Port
VDD
0.01 µF
RESET
Optional
Power-On
Reset Cap
EOC
R/W
DIN
DOUT
DCLK
A0 A1
OSC
CAP+ CAP–
VSS OSCIN OSCOUT
Negative
Supply Output
© 2007 Microchip Technology Inc.
DS21433C-page 1
Share Link: 
