ds8500 Maxim Integrated Products, Inc., ds8500 Datasheet
ds8500
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ds8500 Summary of contents
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... Low power is achieved by dis- abling the receive circuits during transmit and vice versa. The DS8500 is ideal for low-power process con- trol transmitters. 4–20mA Loop-Powered Transmitters for Temperature, Pressure, Flow, and Level ...
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HART Modem ABSOLUTE MAXIMUM RATINGS Voltage Range on All Pins (including AVDD, DVDD) Relative to Ground .................................-0.5V to +3.6V Voltage Range on Any Pin Relative to Ground Except AVDD, DVDD .............-0. Stresses beyond those listed under “Absolute Maximum ...
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... Exposed Pad. Should be connected to ground (DGND, AGND). XTAL1 CRYSTAL OSCILLATOR XTAL2 XCEN OCD Rx DEMODULATOR D_OUT RTS Tx MODULATOR D_IN _______________________________________________________________________________________ FUNCTION . P-P . P-P RST DVDD DGND AGND AVDD V REF 1.23V CLOCK POWER GENERATOR MONITOR DIGITAL SAMPLE/HOLD FILTER ADC DAC DS8500 HART Modem Pin Description Block Diagram REF FSK_IN FSK_OUT 3 ...
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... R1 and R2 provides an input bias voltage of V the ADC input (R1 = R2). The output DAC provides a sine-wave signal, and C4 provides the AC-coupled signal output from the DS8500. The typical value of C4 can be anything greater than 20nF based on the application. Modulator Demodulator Applications Information ...
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... D_IN START FSK_OUT Figure 2. Actual DS8500 Modulator Waveform FSK_IN D_OUT Figure 3. Actual DS8500 Demodulator Waveform _______________________________________________________________________________________ 8-BIT DATA START 8-BIT DATA 1200bps/833μs ONE UART CHARACTER (START, 8 DATA BITS, PARITY, STOP) HART Modem STOP PARITY STOP PARITY 5 ...
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... For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE 20 TQFN 6 _______________________________________________________________________________________ RST DVDD DGND AGND AVDD V REF CLOCK POWER 1.23V GENERATOR MONITOR DIGITAL SAMPLE/HOLD FILTER ADC DS8500 DAC PACKAGE CODE T2055+3 POWER SUPPLY 2.7V TO 3.6V REF FSK_IN HART HART AND 4–20mA FSK_OUT OUT 4–20mA ...
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... Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2009 Maxim Integrated Products HART Modem DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. Revision History PAGES CHANGED — ...