EVALUATION
KIT
AVAILABLE
1
TC530
TC534
5V PRECISION DATA ACQUISITION SUBSYSTEMS
FEATURES
s
s
s
s
s
s
s
s
s
s
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
GENERAL DESCRIPTION
The TC530/534 are serial analog data acquisition sub-
systems 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 exter-
nal 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.
2
3
4
5
6
Optional
Power-On
Reset Cap
ORDERING INFORMATION
Part No.
TC530COI
TC530CPJ
TC534CKW
TC534CPL
TC530EV
Package
Temp. Range
28-Pin SOIC
0°C to +70°C
28-Pin Plastic DIP (300 Mil.) 0°C to +70°C
44-Pin PQFP
0°C to +70°C
40-Pin Plastic DIP
0°C to +70°C
Evaluation Kit for TC530/534
FUNCTIONAL BLOCK DIAGRAM
+5V
+
V
DD
R
INT
C
INT
C
AZ
C
REF
V
DD
10k
100k
TC05
.01µF
V
(TC530 Only)
IN
–
V
IN
CH1 +
CH1 –
CH2 +
CH2 –
CH3 +
CH3 –
CH4 +
CH4 –
DIF.
MUX
(TC534
Only)
BUF
C
AZ
INT
+
–
C
REF
C
REF
Dual Slope A/D Converter
CMPTR A
B
+
V
REF
–
V
REF
V
DD
ACOM
IN +
IN –
0.01µF
RESET
EOC
TC534
(Only)
TC530
TC534
V
DD
State
Machine
DC-TO-DC
CONVERTER
R/W
Serial Port
D
IN
D
OUT
D
CLK
7
Oscillator
(÷ 4)
A0 A1
OSC
V
SS
CAP+
CAP –
OSC
IN
OSC
OUT
Negative
Supply Output
8
TC530/534-3 11/14/96
TELCOM SEMICONDUCTOR, INC.
3-47
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
