mx844 Clare, Inc., mx844 Datasheet
mx844
Related parts for mx844
mx844 Summary of contents
Page 1
... The input multiplexer channel and programmable gain amplifier range may be changed between ADC conversions. An on-chip voltage regulator enables the MX844 to operate over a wide input voltage range of 4 volts. Controller signals may be generated by a pair of 12-bit digital comparators configured as a window comparator or simple threshold detection function ...
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... Operating Junction Temp Thermal Resistance (Junction to Ambient) ESD Warning ESD (electrostatic discharge) sensitive device. Although the MX844 features proprietary ESD protection circuitry, permanent damage may be sustained if subjected to high energy electrostatic discharges. Proper ESD precautions are recommended to avoid performance degradation or loss of functionality. DC Electrical Characteristics ...
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... Xtal 1 Input 21 X2 Xtal 2 Output 22 AOUT Asynchronous Data Output 23 CMP Comparator Output 24 VCC2 Must Be Connected to Vcc 25 VCC Regulator Output / Logic Supply Input 26 VIN Regulator Voltage Input 27 RIN Regulator Internal MOSFET Gate 28 DRV Regulator External PNP Base Drive MX844 Drawing No. 084423 3 IXYS 08/25/06 www.claremicronix.com ...
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... At the end of the power-on reset period, pin CS is sensed to determine the operating mode. Placing an external resistor to VCC on pin CS will cause the MX844 to enter the slave mode. In this mode the synchronous serial I/O port can be connected to a companion microcontroller for full control of the MX844 from the microcontroller ...
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... X2 will start the ADC timing. The input channel and full scale range may be changed in between ADC conversions, however it is recommended that such commands be written into the MX844 as soon as possible after pin DRDY transitions low. This allows the maximum settling time prior to the next ADC conversion. ...
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... The EEPROM address is reset to zero by the SYNC pin pulse. The "ANALOG/DIGITAL CONVERTER" section of this document shows the timing of the asynchronous output bytes relative to the conversion cycle. MX844 Drawing No. 084423 D10 D11 n2 ...
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... A[2:0]. Chip select CS, serial clock SCK, and serial data input SDI are output from the master controller to the MX844. Serial data output SDO is driven by the MX844 when selected SDO is high impedance when SCK and SDI are don't care when ...
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... COMP_1 REGISTER, A[2:0] = 001 binary 7:0 Eight least significant bits of comparator 1 COMP_2 REGISTER, A[2:0] = 010 binary 7:0 Eight least significant bits of comparator 2 COMP_MSN REGISTER, A[2:0] = 011 binary 7:4 Four most significant bits of comparator 1 3:0 Four most significant bits of comparator 2 MX844 Drawing No. 084423 ADC Clock divisor bits M1 low M1 high 000 8 8 001 4 ...
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... Each pulse of SCK corresponds to one bit in the EEPROM. However, the data is aligned such that the MX844 R/W bit that occurs at the 5th SCK pulse of the serial interface timing is the MSB in the EEPROM word. The last 4 bits of the EEPROM word are always zero. For example, the instruction to write the byte 1Ah into the MX844 control register (IN2 +/-250mV scale) would be programmed into the EEPROM as the 16-bit quantity 81A0h ...
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... The two examples shown below are for illustration only, and are not complete schematics. The power dissipation will determine if the external pass element is required regardless of whether an eeprom or a microcontroller are connected. MX844 INTERNAL PASS ELEMENT, SERIAL EEPROM CONNECTION MX844 EXTERNAL PASS ELEMENT, MICROCONTROLLER CONNECTION MX844 Drawing No ...
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... Following application of power, the first 16-bit word read from the EEPROM is 0x8200 (using "C" notation to indicate a hexadecimal number) which in conjunction with the connection of terminal M1 to VCC, causes the MX844 to set it's internal dividers for 488 A/D samples per second and an asynchronous baud rate of 38.4 Kbaud when using an 8 MHz clock. The first measurement is made from input channel IN1 on the +/- 50 mV scale ...
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... Also calculate the power factor. Program listing: /* This program reads alternating samples of voltage and current from /* the MX844 AOUT terminal which is connected com1 port with /* the demo board circuitry. /* This demo program directly accesses the PC's 16550 UART using inp() /* and outp() functions and therefore must be compiled and run in /* real mode (DOS box) under win98 ...
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... MX844 */ lost = 1; while(lost == synchronize to MX844 async data stream */ /* find n0, and n2, twoz = 0; while (twoz == 0) { onez = 0; /* read bytes until n0, while (onez == while ((inp(0x3fd) & {w=1;} /*wait for data ready*/ d[0] = inp(0x3f8); if((d[0] & 0x00c0 onez = 1; ...
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... V counts\n",sum/np); fprintf(inf,"%5.1f calculated average I counts\n",sumi/np sum/np; /* fill the FFT data arrays */ for(i=1;i<=np;i++) /* fft data [1..np] instead of [0..np- xd[i] = ad[i-1]; yd[ xd[ yd[ xd[np+ yd[np+ perform the windowing */ (np - 1); /* i*k==0 if i=0, ==2*pi if i=127 */ for(i=0;i<np;i++) { /* remember [1..np] */ xd[i+1] *= 1-1.8533*cos(i*k)+0.7046*cos(2*i*k); } MX844 Drawing No. 084423 14 IXYS 08/25/06 www.claremicronix.com ...
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... MX844 Drawing No. 084423 %12.4f\n",xd[i],yd[i]); 15 IXYS 08/25/06 www.claremicronix.com ...
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... MX844 Drawing No. 084423 16 IXYS 08/25/06 www.claremicronix.com ...
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... R7 470 VIN VCC RIN TVCC CMP DRV AOUT 8 MHz Resonator MX844 18 SDI 5 17 SDO 6 16 SCK 7 15 DRDY 22K SYNC IN1N M1 IN2P IN3N IN2N IN3P C5 10nF ...
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... POWER MONITOR PRINTED CIRCUIT DEMO BOARD LAYOUT Artwork scale approximately actual size DB-9 connector for RS-232 connection. P2 and P3 are screw-type terminals for AC power line connection. All other components are surface mount. Silkscreen: Top Layer: Bottom Layer: MX844 Drawing No. 084423 . Isolation path 18 IXYS 08/25/06 www.claremicronix.com ...
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... MX844 POWER MONITOR PRINTED CIRCUIT BOARD PARTS LIST U1 MICRONIX MX844 U2 MICROCHIP 93LC46B U3 LiteOn 4N35S Q1 ON Semi MBT3904 Q2 ON Semi MBT3906 D1 ON Semi MMSZ5245B D2 Fairchild S1J X1 Abracon AWSCR-8.00MGD-T C1 Nichicon UWX1C101MCL1GB C2 Murata GRM155F51C104ZA01D C3 Murata GRM2165C1H332JA01D (low loss for integrator, COG acceptable, metal film is better) ...
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... Except as set forth in IXYS’ Standard Terms and Conditions of Sale, IXYS Corporation assumes no liability whatsoever, and disclaims any expressed or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right . MX844 Drawing No. 084423 PIN 1 (REF.) MM. ...
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... The products described in this document are not intended for use in medical implantation or other direct life support applications where malfunction may result in direct physical harm, injury or death to a person. Specification: MX844 ©Copyright 2006, IXYS Corporation All rights reserved. Printed in USA. 21 08/25/06 www ...