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TC534CKW Datasheet(PDF) 2 Page - Microchip Technology |
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TC534CKW Datasheet(HTML) 2 Page - Microchip Technology |
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2 / 22 page  TC530/TC534 DS21433B-page 2 © 2002 Microchip Technology Inc. General Description The TC530/TC534 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 sup- ply generator and 3 wire serial interface port. The TC534 is identical to the TC530, but adds a four chan- nel differential input multiplexer. Key A/D converter operating parameters (Auto Zero and Integration time) are programmable, allowing the user to trade 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 Over- range and polarity bits) is held in the output shift regis- ter until read by the processor or until the next conversion is completed, allowing the user to access data at any time. The TC530/TC534 timebase can be derived from an external crystal of 2MHz (max) or from an external fre- quency source. The TC530/TC534 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. Typical Application A0 A1 OSCIN R/W DIN DOUT DCLK OSCOUT OSC RESET CAP+ CAP– CAZ TC530 TC534 CREF RINT CINT TC534 (Only) (TC530 Only) DC-TO-DC Converter State Machine Serial Port Negative Supply Output Oscillator (÷ 4) Dual Slope A/D Converter .01 µF 0.01 µF Optional Power-On Reset Cap 100k +5V DIF. MUX (TC534 Only) AB CMPTR BUF INT CAZ ACOM VDD VDD VDD VDD VSS MCP1525 VREF- VREF+ VIN- VIN+ EOC CH2+ CH3+ CH1+ CH4+ CH4- CH3- CH2- CH1- IN+ IN- CREF- CREF+ |
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