MAX1229BEEP+ Maxim Integrated Products, MAX1229BEEP+ Datasheet
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MAX1229BEEP+
Specifications of MAX1229BEEP+
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MAX1229BEEP+ Summary of contents
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... System Supervision Data-Acquisition Systems Industrial Control Systems Patient Monitoring Data Logging Instrumentation AutoShutdown is a trademark of Maxim Integrated Products, Inc. SPI/QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. TOP VIEW + AIN0 1 AIN1 ...
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ADCs with FIFO, Temp Sensor, Internal Reference ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0.3V to +6V DD CS, SCLK, DIN, EOC, DOUT to GND.........-0. AIN0–AIN13, REF-/AIN_, CNVST/AIN_, REF+ to GND.........................................-0. Maximum Current into Any ...
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ELECTRICAL CHARACTERISTICS (continued +2.7V to +3.6V 300kHz SAMPLE noted. Typical values are +25°C.) A PARAMETER SYMBOL CONVERSION RATE Power-Up Time Acquisition Time Conversion Time t External Clock Frequency SCLK Duty Cycle ...
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ADCs with FIFO, Temp Sensor, Internal Reference ELECTRICAL CHARACTERISTICS (continued +2.7V to +3.6V 300kHz SAMPLE noted. Typical values are +25°C.) A PARAMETER SYMBOL DIGITAL INPUTS (SCLK, DIN, CS, CNVST) ...
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TIMING CHARACTERISTICS (Figure 1) PARAMETER SYMBOL SCLK Clock Period SCLK Duty Cycle SCLK Fall to DOUT Transition CS Rise to DOUT Disable CS Fall to DOUT Enable DIN to SCLK Rise Setup SCLK Rise to DIN Hold ...
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ADCs with FIFO, Temp Sensor, Internal Reference (V = +3V +2.5V 4.8MHz REF SCLK SFDR vs. FREQUENCY 120 100 0 100 1000 FREQUENCY (kHz) SHUTDOWN ...
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V = +2.5V 4.8MHz REF SCLK INTERNAL REFERENCE VOLTAGE vs. TEMPERATURE 2.510 2.506 2.502 2.498 2.494 2.490 -40 - TEMPERATURE (°C) GAIN ERROR vs. SUPPLY VOLTAGE 2.0 1.5 1.0 0.5 ...
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ADCs with FIFO, Temp Sensor, Internal Reference MAX1231 MAX1231 MAX1229 MAX1227 TQFN-EP QSOP 2–12, 26, 1–14 — 27, 28, — — 1–10 — — — — — — 11 — — — — — ...
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CS t CSS0 SCLK DIN t DOE DOUT Figure 1. Detailed Serial-Interface Timing Diagram CS DIN SCLK CNVST AIN1 AIN2 AIN15 REF- REF+ Figure 2. Functional Diagram Detailed Description The MAX1227/MAX1229/MAX1231 are low-power, seri- al-output, multichannel ...
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ADCs with FIFO, Temp Sensor, Internal Reference Converter Operation The MAX1227/MAX1229/MAX1231 ADCs use a fully dif- ferential, successive-approximation register (SAR) con- version technique and an on-chip T/H block to convert temperature and voltage signals into a 12-bit digital ...
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REF AIN0-AIN15 DAC GND (SINGLE ENDED); AIN0, AIN2, AIN4…AIN14 CIN+ (DIFFERENTIAL) HOLD GND CIN- (SINGLE ENDED); AIN1, AIN3, AIN5…AIN15 HOLD (DIFFERENTIAL Figure 3. Equivalent Input Circuit Address the unipolar and bipolar registers through the setup register (bits ...
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ADCs with FIFO, Temp Sensor, Internal Reference Applications Information Register Descriptions The MAX1227/MAX1229/MAX1231 communicate between the internal registers and the external circuitry through the SPI-/QSPI-compatible serial interface. Table 1 details the registers and the bit names. Tables 2–7 ...
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Table 2. Conversion Register BIT BIT FUNCTION NAME — 7 (MSB) Set select conversion register. CHSEL3 6 Analog input channel select. CHSEL2 5 Analog input channel select. CHSEL1 4 Analog input channel select. CHSEL0 3 Analog input ...
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ADCs with FIFO, Temp Sensor, Internal Reference Table 3. Setup Register BIT NAME BIT — 7 (MSB) Set to zero to select setup register. — 6 Set select setup register. Clock mode and CNVST configuration. ...
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Temperature Measurements The MAX1227/MAX1229/MAX1231 perform tempera- ture measurements with an internal diode-connected transistor. The diode bias current changes from 68µA to 4µA to produce a temperature-dependent bias volt- age difference. The second conversion result at 4µA is subtracted from the ...
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ADCs with FIFO, Temp Sensor, Internal Reference Table 6. Averaging Register BIT NAME BIT — 7 (MSB) Set to zero to select averaging register. — 6 Set to zero to select averaging register. — 5 Set to 1 ...
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Internally Timed Acquisitions and Conversions Using CNVST Performing Conversions in Clock Mode 00 In clock mode 00, the wake-up, acquisition, conversion, and shutdown sequences are initiated through CNVST and performed automatically using the internal oscilla- tor. Results are added to ...
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ADCs with FIFO, Temp Sensor, Internal Reference CNVST (ACQUISITION1) (ACQUISITION2) CS (CONVERSION1) SCLK DOUT EOC REQUEST MULTIPLE CONVERSIONS BY SETTING CNVST LOW FOR EACH CONVERSION. Figure 5. Clock Mode 01 (CONVERSION BYTE) DIN CS SCLK DOUT EOC THE ...
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DIN (ACQUISITION1) CS SCLK DOUT EOC EXTERNALLY TIMED ACQUISITION, SAMPLING AND CONVERSION WITHOUT CNVST. Figure 7. Clock Mode 11 Externally Clocked Acquisitions and Conversions Using the Serial Interface Performing Conversions in Clock Mode 11 In clock mode 11, acquisitions and ...
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ADCs with FIFO, Temp Sensor, Internal Reference OUTPUT CODE FULL-SCALE TRANSITION 111 110 101 ...
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TOP VIEW + AIN0 1 AIN1 2 AIN2 3 AIN3 4 MAX1231 AIN4 5 AIN5 6 AIN6 7 AIN7 8 AIN8 9 AIN9 10 AIN10 11 AIN11 12 QSOP Total Harmonic Distortion Total harmonic distortion (THD) is the ratio of ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...