TC530 Datasheet, PDF (1/15 Pages) TelCom Semiconductor, Inc – 5V PRECISION DATA ACQUISITION SUBSYSTEMS

EVALUATION
KIT
AVAILABLE
1
TC530
TC534
5V PRECISION DATA ACQUISITION SUBSYSTEMS
2
FEATURES
GENERAL DESCRIPTION
s Precision (up to 17 Bits) A/D Converter
s 3 Wire Serial Port
s Flexible: User Can Trade-Off Conversion Speed
Against Resolution
s Single Supply Operation
s –5V Output Pin
s 4 Input, Differential Analog MUX (TC534)
s Automatic Input Polarity and Overrange Detection
s Low Operating Current ............................ 5mA Max
s Wide Analog Input Range ...................... ±4.2V Max
s Cost Effective
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
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
3 ^{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
4 ^{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.
5
FUNCTIONAL BLOCK DIAGRAM
(TC530 Only) ^VVII+NN_–
CH1 ⁺
CH1 ^–
TC534
(Only)
CH2 ⁺
CH2 ^–
CH3 ⁺
CH3 ^–
CH4 ⁺
CH4 ^–
+5V
V_DD
R_INT
C_INT
C_AZ
C_REF
V_DD
10k
100k TC05
.01µF
DIF.
MUX
(TC534
Only)
TC530
TC534
BUF C_AZ
IN ⁺
IN ^–
INT ^CR⁺EF ^CR^–EF
V_R⁺_EF
Dual Slope A/D Converter
CMPTR A B
V_R^–_EF
ACOM
V_DD
DC-TO-DC
CONVERTER
State
Machine
Oscillator
(÷ 4)
Serial Port
A0 A1
OSC
CAP+ CAP ^–
V_SS
OSC_IN
OSC_OUT
Negative
Supply Output
TELCOM SEMICONDUCTOR, INC.
V_DD
0.01µF
RESET
EOC
R/W
D_IN
D_OUT
D_CLK
6
Optional
Power-On
Reset Cap
7
8
TC530/534-3 11/14/96
3-47