EVALUATION
KIT
AVAILABLE
TC530
TC534
5V Precision Data Acquisition Subsystems
FEATURES
GENERAL DESCRIPTION
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The TC530/534 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 supply generator and 3 wire
serial interface port. The TC534 is identical to the TC530, but
adds a four channel differential input multiplexer. Key A/D
converter operating parameters (Auto Zero and Integration
time) are programmable, allowing the user to trade-off
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 Overrange 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 TC530/534 timebase can be derived from an external crystal of 2MHz (max), or from an external frequency
source. The TC530/534 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.
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Precision (up to 17 Bits) A/D Converter
3 Wire Serial Port
Flexible: User Can Trade-Off Conversion Speed
Against Resolution
Single Supply Operation
– 5V Output Pin
4 Input, Differential Analog MUX (TC534)
Automatic Input Polarity and Overrange Detection
Low Operating Current ............................ 5mA Max
Wide Analog Input Range ...................... ±4.2V Max
Cost Effective
ORDERING INFORMATION
Part No.
Package
Temp. Range
TC530COI
TC530CPJ
TC534CKW
TC534CPL
TC530EV
28-Pin SOIC
28-Pin Plastic DIP (300 Mil.)
44-Pin PQFP
40-Pin Plastic DIP
Evaluation Kit for TC530/534
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
FUNCTIONAL BLOCK DIAGRAM
CINT
+5V
RINT
VDD
+
V
(TC530 Only) IN
V –
IN
BUF CAZ
CH1 +
CH1 –
TC534
(Only)
INT
IN +
IN –
CH2 +
CH2 –
DIF.
MUX
CH3 +
CH3 –
(TC534
Only)
TC530
TC534
+
–
CREF CREF
DS21433A
OSC
TC05
+
VREF
–
VREF
VDD
ACOM
Dual Slope A/D Converter
CMPTR A
0.01µF
B
EOC
Oscillator
(÷ 4)
VSS
CAP+
CAP –
Optional
Power-On
Reset Cap
RESET
VDD
DC-TO-DC
CONVERTER
A0 A1
100k
.01µF
State
Machine
CH4 +
CH4 –
© 2001 Microchip Technology Inc.
CAZ
10k
VDD
CREF
OSCIN
R/W
Serial Port
DIN
DOUT
DCLK
OSCOUT
Negative
Supply Output
TC530/534-3 11/14/96