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EVALUATION KIT AVAILABLE
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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 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.
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 (TC530 Only) IN V–
IN
CINT RINT CAZ
CREF
VDD
10k
100k
TC05
.01µF
VDD
BUF CAZ
INT
+ – CREF CREF Dual Slope A/D Converter CMPTR A B
+ VREF
– VREF
VDD
ACOM
CH1 + CH1 – CH2 + CH2 – CH3 + CH3 – CH4 + CH4 – DIF. MUX (TC534 Only)
IN + IN –
0.01µF RESET EOC
TC534 (Only)
TC530 TC534
VDD State Machine
DC-TO-DC CONVERTER
R/W Serial Port DIN DOUT DCLK
7
Oscillator (÷ 4)
A0 A1
OSC
VSS CAP+ CAP –
OSCIN
OSCOUT
Negative Supply Output
8
TC530/534-3 11/14/96
TELCOM SEMICONDUCTOR, INC.
3-47
5V PRECISION DATA ACQUISITION SUBSYSTEMS www.DataSheet4U.com TC530 TC534
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage ........................................................... +6V + – Analog Input Voltage (VIN or VIN ) ....................... VDD to VSS Logic Input Voltage ................. (VDD + 0.3V) to (GND – 0.3V) Ambient Operating Temperature Range Plastic DIP Package .............................................. (C) 0°C to +70°C SOIC Package (C) ......