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TC534CKW

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EVALUATION KIT AVAILABLE TC530 TC534 5V Precision Data Acquisition Subsystems FEATURES GENERAL DESCRIPTION I I I 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. I I I I I I I 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

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