MAXQ314-KIT Maxim Integrated Products, MAXQ314-KIT Datasheet
MAXQ314-KIT
Specifications of MAXQ314-KIT
Related parts for MAXQ314-KIT
MAXQ314-KIT Summary of contents
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... I C bus. This bus is also used by the external master to configure the operation of the MAXQ314 and monitor the status of operations. The MAXQ314 performs voltage and current measure- ments using an integrated ADC that can measure voltage and current. Other values such as power are calculated from that data ...
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... I C Slave Address Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Protocol Data and Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Conversion to Physical Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 RMS Current Continuous Output (AUX Pin Applications Information Grounds and Bypassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Specific Design Considerations for MAXQ314-Based Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Development and Technical Support Package Information ______________________________________________________________________________________ TABLE OF CONTENTS ...
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Single-Phase Power-Measurement Figure 1. Series Resistors (R ) for Protecting Against High-Voltage Spikes . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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Single-Phase Power-Measurement 2 IC with I C Interface ABSOLUTE MAXIMUM RATINGS Voltage Range on DVDD with Respect to DGND .............................................-0.3V to +4.0V Voltage Range on AVDD with Respect to AGND .............................................-0.3V to +4.0V Voltage Range on AGND with Respect to ...
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Single-Phase Power-Measurement ELECTRICAL CHARACTERISTICS (continued 3.0V to 3.6V +25NC, unless otherwise noted.) (Note 2) AVDD DVDD A PARAMETER SYMBOL Output Low Voltage (AUX) Input Leakage (A0, A1, A2) Input Capacitance (RST, A0, A1, A2) ...
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Single-Phase Power-Measurement 2 IC with I C Interface BUS CONTROLLER TIMING (V = 3.0V to 3.6V +25NC, unless otherwise noted. Typical values are at V DVDD A PARAMETER SYMBOL Serial Clock Frequency Bus Free Time ...
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... Single-Phase Power-Measurement MAXQ314 Figure 1. Series Resistors (R ) for Protecting Against High-Voltage Spikes S S SDA t F_I2C t LOW SCL t HD:STA t HD:DAT 2 Figure Bus Controller Timing Diagram _______________________________________________________________________________________ IC with I V DVDD DEVICE DEVICE SDA SCL SR t R_I2C t SU:DAT t HIGH 2 C Interface BUF t SU:STA t SU:STO S 7 ...
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... Active-Low Reset Input. The CPU is held in reset when this pin is low. The pin includes pullup current 13 RST source and should be driven by an open-drain external source capable of sinking in excess of 4mA. 8 ______________________________________________________________________________________ TOP VIEW AVDD 17 18 AGND MAXQ314 IL 19 EP* N. TQFN (5mm × 5mm) *EXPOSED PAD. FUNCTION POWER PINS COMMUNICATION AND CONTROL PINS ...
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... Single-Ended Current Input, Low Frequency N.C. No Connection. Do not connect any signal to this pin Detailed Description The MAXQ314 is a dedicated analog front-end (AFE) that measures voltage, current, and temperature. The internal DSP then derives calculated values. It communicates 2 with a master device using the I C communication proto- col, and continuously executes the following operations: • ...
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... Data length is 2 bytes for most registers, both read and write; 3 bytes for power ( PAVG), VRMS, and IRMS read com- mands. The MAXQ314 could be unable to report data like power, IRMS, VRMS, etc., immediately if the read command is received while the requested data is being calculated ...
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Single-Phase Power-Measurement Data and Control Registers All transactions consist of the master writing to or read- ing from data, configuration, or control registers. Each register has an 8-bit address. There are several catego- ries of internal registers; read-only registers return ...
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... LPFC Lowpass filter compensation SUMCNT Number of sampling frames per DSP cycle ADC autozero operation. The master issues this command only when it is initializing the MAXQ314. Any value written to this ADC_AZ register initiates a reset of the ADC, which takes approximately 1.5ms to complete. P_OFFS ...
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... RESET_STATUS MAXQ314 has performed a reset. After the bits have been read, the master must write 0000 to these bits to clear the reset indicator. Writing to and reading from these bits does not affect processor operation or cause a reset; they are only status bits. ...
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... I MU correction. Voltage RMS correction is: where V MU correction. Active power correction is V_GAIN x I_GAIN x P_GAIN x (P_OFFS + P where P MAXQ314 MU before correction. Apparent power is computer from the corrected voltage and current: Reactive power is computer from corrected S and P: DESCRIPTION 16 , where f is the corner frequency ...
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... Doing so reduces the susceptibility of the design to fast transient noise. Because the MAXQ314 is used in systems where high voltages are present, care must be taken to route all signal paths, both analog and digital, as far away as pos- sible from the high-voltage components ...
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... Development and Technical Maxim offers the MAXQ314 evaluation kit (EV kit aid in developing and prototyping applications based on the MAXQ314. The EV kit is a reference design from which a developer can begin designing their own sys- tem. The EV kit data sheet contains a schematic of the board that can be reviewed by engineers who want to perform a preliminary investigation of the device uses before purchasing the EV kit ...