![]() |
|
If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
Datasheet File OCR Text: |
EM MICROELECTRONIC - MARIN SA EM6415 Sensor Signal Conditioner Circuit with 14 bits A/D Converter Description The EM6415 is a high resolution A/D converter in low voltage CMOS technology intended to be used as a programmable link between one to four resistive sensors and a microcontroller. There is no need of external components for calibration, error curve compensation or offset and gain adjustment, nor external amplifiers and sensor bridge drive circuits. After exposure to a calibration signal/profile, all conversion parameters and profile coefficients are self calculated and stored in an external EEPROM. In addition to a programmable dual slope 10/13/14 bit A/D conversion, EM6415 allows individual compensation of not only sensor offset and full scale errors, but also temperature error compensation of the sensor zero point and sensitivity, dynamically during the conversion process. EM6415 also contains a programmable sensor drive current source. Features Full sensor system on chip Four sensor channel multiplexer Programmable Dual slope A/D converter Program selectable 10, 13 or 14 bit resolution ADC resolves 1V/Bit Programmable sensor offset, gain and linearity High flexibility in zero adjust and full scale adjust Sensor error compensation performed by software Parallel 4 bit microcontroller interface Self calibration of conversion parameters and profile coefficients Ultra low noise differential input amplifier with mask programmable gain Excellent linearity over full transfer curve Programmable current source for sensor supplies. Low supply voltage range 2.2V - 3.6 V Low operation current, 240 A at 800 kHz, 3V Ultra low power consumption (at standby or after conversion down to less than 0.1 A) Small SSOP36-300mils package Applications Portable sensor instruments Telemetry Resistive sensor interfaces Automotive sensors Industrial process control Consumer instruments Typical Application VDD CAZ CI P3WAY RINT13_14 VDDA RSEN1 RSEN2 Sensor1 TS1 CH1H CH1L TS2 Sensor2 CH2H CH2L TS3 Sensor3 CH3H CH3L TS4 Sensor4 CH4H CH4L VDDD AZN RINT10 CINT CE RD WR ALE CE RD WR STROBE MICROCONTROLLER EM6415 D0-D3 DATA EEPROM CLKP VDD CLKSEL LCD VSSD VSSA VREF Fig. 1 Copyright 2002, EM Microelectronic-Marin SA 1 www.emmicroelectronic.com EM6415 Block Diagram RSEN1 RSEN2 CE ALE WR RD D3 D2 D1 D0 Programmable Current Source 44-Bit D/A Converter Microcontroller Interface and Control Logic Power On Reset Detector CH1 Fixed Gain Amplifier 8 Bit D/A Converter Offset + Full Scale Calibration DC Bias TS1 CH1H CH1L CH2 TS2 CH2H CH2L CH3 CLKSEL CLKP TS3 CH3H CH3L CH4 10 / 13 / 14 Bit Bandgap Voltage Reference Analog Multiplexer Dual Slope AD Converter RC Oscillator TS4 CH4H CH4L VREF RINT13_14 AZN P3WAY CINT Fig. 2 Copyright 2002, EM Microelectronic-Marin SA 2 www.emmicroelectronic.com EM6415 Absolute Maximum Ratings Parameter Supply Voltage Voltage at remaining pins Storage temperature Operating temperature Soldering Temperature*Time Symbol VDD VPIN Tstore Top TSMAX Min -0.3 VSS-0.3 -55 -40 Max 5.5 VDD+0.3 150 +85 25010 Unit V V C C Cs Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Handling Procedures This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level. Electrical Characteristics Operating Conditions (unless othewise specified) Positive supply VDD VSS Negative supply T Ambient temperature Sensor resistance RSEN Power Supply Parameter Operating Voltage Range Current Consumption Symbol VDD IDD1 IDD2 = = = = 3.0V 0V 25C 300 to 10K Conditions T = -20C to 70C CE =VDD at standby CE =VSS at A/D conversion fADOSC=800kHz Min. 2.2 Typ. 3.0 0.2 Max. 3.6 1.0 300 Unit V A A 100 240 Programmable Internal Oscillator Parameter Frequency Frequency Step Size Stability Against Supply Voltage Variations Stability Against Temperature Variations Symbol fADOSC fADOSC f/fVDD f/T 2.2V< VDD <3.0V -20C 3 www.emmicroelectronic.com EM6415 Sensor Parameter Sensor Drive Current Symbol ISDRV Conditions R RSEN1=1.0k , RSEN=4.0k, Program step 0 Mode S RRSEN1=1.0k , RSEN=4.0k, Program step 15 Mode S Sensor Drive Current per Step Sensor Drive Current vs Voltage Deviation Sensor Bridge Resistance1 Sensor Bridge Resistance2 RSEN1 Resistance RSEN2 Resistance ISDRV /stp ISDRV/V RSEN1 RSEN2 RRSEN1 RRSEN2 RRSEN1=1.0k , RSEN=4.0k RRSEN1=1.0k , RSEN=4.0k 2.2V < VDD < 3.0V RRSEN1=1.3k , ISDRV =200A RRSEN2=510 , ISDRV=500A Min. 276 Typ. 300 Max. 324 Unit A 468 510 552 A 10 50 2.7 1.0 0.3 0.3 15 200 3.7 1.5 20 300 4.2 2.0 2.5 2.5 A/stp ppm k k k k A/D Converter Parameter Input Voltage Range FS Resolution Integral Nonlinearity Differential Nonlinearity Conversion Time Offset Adjust Range FS Fine Ajust Range Symbol VSENS RESADC INLADC DNLADC TCONVAD VOFFAD VFSFAD 12 bit FS fine adjust Conditions CH1,2,3,4H-CH1,2,3,4L To resolve 14 bits ADC fADOSC=800kHz fADOSC=800kHz fADOSC=800kHz fADOSC=500kHz, 14bit -60 -12.5 Min. 16 14 4 3 110 40 +60 +12.5 Typ. Max. 200 Unit mV Bits LSB LSB ms mV %FS Copyright 2002, EM Microelectronic-Marin SA 4 www.emmicroelectronic.com EM6415 DC Characteristics Parameter Symbol Conditions Min. Typ. Max Unit Input Low Voltage Input High Voltage Input Low Current Input High Current VIL VIH IIL IIH ALE , RD , WR , CE , CLKP, CLKSEL, D0-D3 ALE , RD , WR , CE , CLKP, CLKSEL, D0-D3 ALE , RD , WR , CE , CLKP, CLKSEL, D0-D3 ALE , RD , WR , CE , CLKP, CLKSEL, D0 - D3 0.2 VDD 0.8VDD -20 1 1 20 V V nA nA Output Low Voltage Output High Voltage VOL VOH IOL = 2mA, D0 -D3 IOH = -1mA, D0 -D3 2.4 0.1 2.95 0.4 V V Timing Characteristics Data Write cycle VDD = 3.0V, VSS = 0V, T = 25 C, VOH = 0.8VDD, VOL = 0.2VDD Item Symbol Address Set-up Time Twas Address Hold Time Twah Data Set-up Time Twds Data Hold Time Twdh ALE Pulse Width WR Pulse Width Min. 20 30 20 30 60 60 Typ. 25 35 25 35 65 65 Max. - Unit ns ns ns ns ns ns Twap Twwp ALE VOH VOL twap WR twas VOH twah Address VOL VOH VOL twds twdp Data twdh VOH VOL Fig. 3 D0-D3 Copyright 2002, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com EM6415 Data Read cycle VDD = 3.0V, VSS = 0V, T = 25 C, VOH = 0.8VDD, VOL = 0.2VDD Item Symbol Min. Address Set-up Time Address Hold Time Data Set-up Time Data Hold Time ALE Pulse Width RD Pulse Width Typ. 45 25 25 65 65 Max. - Unit ns ns ns ns ns ns Tras Trah Trds Trdh Trap Trrp 100 40 20 20 60 60 Timing Waveforms ALE VOH VOL tras trah trdp trds VOH trdh Data VOH VOL RD VOH VOL D0-D3 Address VOL VOH VOL Fig. 4 Copyright 2002, EM Microelectronic-Marin SA 6 www.emmicroelectronic.com EM6415 Functional Description EM6415 comprises a four channel analog multiplexer followed by a fixed gain amplifier followed by the integrator of the dual slope converter, a bandgap voltage reference, RC oscillator, power on/off detector. The sensor is supplied directly by a programmable current source. In order to minimize noise, the analog and digital circuits internal to EM6415 use separate power supplies. These power buses are brought out to separate pins and should be tied together as close as possible to the device. In addition, the output of the internal bandgap voltage reference is brought to the pin VREF, which could allow the connection of an external capacitor to VSS, if the output stability is not enough to resolve 1V/bit ADC. Programming Procedure Nibble organization and Bit order: Bit 3 2 1 0 Order high low Latch Address (LAD) and Functions LAD 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Function FS fine adjust FS fine adjust FS fine adjust OS rough adjust OS rough adjust FS rough adjust FS rough adjust Bridge current ADC status & ADC output AD0, AD1 ADC output AD2-AD5 ADC output AD6-AD9 & T0-T3 ADC output AD10-AD13 & T4-T7 ADC resolution (10, 13, 14) Perform ADC conversion (T, R, S, P) Select Sensor-Port (1,2,3,4) & RSEN (1,2) don't use Bits D0-D3 0-3 4-7 8-11 0-3 4-7 0-3 4-7 0-3 0-3 2-5 6-9 10-13 0-3 0-3 0-3 WR/RD WR WR WR WR WR WR WR WR RD RD RD RD WR WR WR Note (note 1) (note 2) (note 2) (note 2) (note 3) (note 4) (note 5) Note 1: ADC Status & AD0, AD1 (LAD=8) Bit Function Note D0 CC Conversion complete = 1 D1 COVFL Conversion overflow = 1 D2 AD0 ADC Bit 0 D3 AD1 ADC Bit 1 Note 2: ADC read out Latch Address Buffer Bit ADC Bits Sensor AD-14 Sensor AD-13 Sens/Pow AD10 Top of B AD10 11 3 13 12 9 9 2 12 11 8 8 1 11 10 7 7 0 10 9 6 6 3 9 8 5 5 2 8 7 4 4 10 1 7 6 3 3 0 6 5 2 2 3 5 4 1 1 2 4 3 0 0 9 1 3 2 0 2 1 3 1 0 - 8 2 0 - Copyright 2002, EM Microelectronic-Marin SA 7 www.emmicroelectronic.com EM6415 Note 3: ADC resolution & frequency select (LAD 12) Bit Select Function D1, D0 00 clock 500kHz 01 clock 600kHz 10 clock 700kHz 11 clock 800kHz D3, D2 00 10 Bit ADC 01 13 Bit ADC 10 13 Bit ADC 11 14 Bit ADC Note 4: ADC conversion select (LAD=13) Bit Select Function D1, D0 don't use D3, D2 00 (T) top of sensor bridge with ISDRV /2 01 (R) A/D ramp height 10 (S) sensor bridge signal ISDRV 11 (P) power supply voltage Note 5: ADC conversion select (LAD=14) Bit Select Function D0 0 RSENS1 1 RSENS2 D2, D1 00 Sensor 1 on TS1 01 Sensor 2 on TS2 10 Sensor 3 on TS3 11 Sensor 4 on TS4 D3 Don't use Note (note 6) (note 7) (note 8) (note 9) Note 6: Note 7: Top of sensor bridge, e.g. temperature (ToB - VSSA) Select ramp height if CC=0, ramp height > 1.5V For lowest ADC jitter, chose ramp height > 1.5V. To do so, run A/D ramp height conversion and read CC (conversion complete, LAD8, Bit0). Lower the clock frequency until CC=0. Note 8: Note 9: Sensor bridge signal, e.g. pressure (CH1L - CH1H) Power supply voltage of EM6415 circuit Copyright 2002, EM Microelectronic-Marin SA 8 www.emmicroelectronic.com EM6415 Integrator This signal can be seen on pin CINT D A A D 8Bit 8Bit OFFSET ROUGH ADJUST FS ROUGH ADJUST min. 1.5V for 14Bit at 3V power supply dV2 0.720V dV1 t1 t2 t3 D 12Bit A 14Bit ADC OUTPUT FS FINE ADJUST Fig. 5 Integrator ramp Time t1 t2 t3 Phase Autozero phase FS fine adjust FS rough adjust Execution Set up of integrator starting point Signal integration with preprogrammed counter time length t2 De-integration with preprogrammed reference voltage, time length of t3 = ADC output counts dV1 is the Offset Rough Adjust dV2 is the Integrator Ramp Length Offsets and other system mismatch such as the zero drift of operational amplifiers, long term instabilities or supply voltage fluctuations are cancelled during the Autozero phase. Sensitivity and full-scale range adjustments are done during rampup and rampdown of the dual slope integrator. Copyright 2002, EM Microelectronic-Marin SA 9 www.emmicroelectronic.com EM6415 Pad Description & Pin Assignment in SSOP36 PIN Nr 10 11 12 13 14 15 16 17 18 19 20 21 2 1 36 35 31 32 33 34 22 23 24 25 26 8 9 3 5 6 7 29 30 27 4, 28 I: Input Name TS1 CH1H CH1L TS2 CH2H CH2L TS3 CH3H CH3L TS4 CH4H CH4L D0P D1P D2P D3P RD ALE I/O CE WR I/O I/O I/O I/O I I I I Description Top of sensor1 bridge connection pin Sensor1 channel high signal in Sensor1 channel low signal in Top of sensor2 bridge connection pin Sensor2 channel high signal in Sensor2 channel low signal in Top of sensor3 bridge connection pin Sensor3 channel high signal in Sensor3 channel low signal in Top of sensor4 bridge connection pin Sensor4 channel high signal in Sensor4 channel low signal in Microprocessor Port Data 0 Microprocessor Port Data 1 Microprocessor Port Data 2 Microprocessor Port Data 3 Read strobe for BUS read (active low) Address latch enable (active low) Chip enable (active low) Write strobe for BUS write (active low) Connection to integrator capacitor Connection to auto-zero capacitor 3 way connection for integrator Connection of resistor for integrator Connection of resistor for integrator when 10 bit conversion used Resistor to select sensor bridge1 maximum drive current Resistor to select sensor bridge2 maximum drive current External clock input Internal/external clock select Positive supply voltage of digital part Positive supply voltage of analog part Negative supply voltage of analog part Negative supply voltage of digital part Reference voltage Not connected CINT AZN P3WAY RINT13_14 RINT10 RSEN1 RSEN2 CLKP CLKSEL VDDD VDDA VSSA VSSD VREF NC O: Output I I O Copyright 2002, EM Microelectronic-Marin SA 10 www.emmicroelectronic.com EM6415 Package Information SSOP36 - 300 mils Symbol A A1 A2 B C D E e H h L X Common dimensions (inches) Min Nom Max 0.097 0.101 0.104 0.0050 0.009 0.0115 0.090 0.092 0.094 0.012 0.014 0.017 0.0091 0.010 0.0125 0.602 0.607 0.612 0.292 0.296 0.299 0.0315 BSC 0.400 0.406 0.410 0.010 0.013 0.016 0.024 0.032 0.040 0.085 0.093 0.100 0 5 8 Note Symbol A A1 A2 B C D E e H h L X Common dimensions (mm) Min. Nom Max 2.46 2.56 2.64 0.127 0.22 0.29 2.29 2.34 2.39 0.31 0.36 0.43 0.23 0.25 0.32 15.29 15.42 15.54 7.42 7.52 7.59 0.80 BSC 10.16 10.31 10.41 0.25 0.33 0.41 0.61 0.81 1.02 2.16 2.36 2.54 0 5 8 Note Copyright 2002, EM Microelectronic-Marin SA 11 www.emmicroelectronic.com EM6415 Ordering Information The EM6415 has metal mask options for the Gain of the Input Amplifier (between 1 and 150 max) and for the Offset Adjust Range. Contact EM Microelectronic for availability of different options not shown in table below. Please make sure to order the exact Part Number when ordering. Input Amplifier Gain 5 5 OS/FS Rough Adjust (note 1) Separate Registers for each sensor Common Registers for the 4 sensors Separate Registers for each sensor custom Offset Adjust Range -40mV to +40mV -40mV to +40mV Part Number EM6415V1WS11 EM6415V1SS36A EM6415V1SS36B EM6415V2WS11 EM6415V2SS36A EM6415V2SS36B EM6415V3WS11 EM6415V3SS36A EM6415V3SS36B EM6415V%WS11 EM6415V%SS36A EM6415V%SS36B Version Delivery Form Sawn wafer, 11 mils thickness 36-pin SSOP, Stick 36 pin SSOP, Tape & Reel Sawn wafer, 11 mils thickness 36-pin SSOP, Stick 36 pin SSOP, Tape & Reel Sawn wafer, 11 mils thickness 36-pin SSOP, Stick 36 pin SSOP, Tape & Reel Sawn wafer, 11 mils thickness 36-pin SSOP, Stick 36 pin SSOP, Tape & Reel V1 V2 V3 V% 150 custom -40mV to +40mV custom Note 1: LAD 3, 4, 5, 6 For die size information and pad location diagram, please contact EM Microelectronic-Marin SA. EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version. (c) EM Microelectronic-Marin SA, 11/02, Rev. B Copyright 2002, EM Microelectronic-Marin SA 12 www.emmicroelectronic.com |
Price & Availability of EM6415
![]() |
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
[Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |