Datasheet AD7851 (Analog Devices) - 3
| Hersteller | Analog Devices |
| Beschreibung | 14-Bit, 333 kSPS, Serial Sampling A/D Converter |
| Seiten / Seite | 37 / 3 — AD7851. TABLE OF CONTENTS |
| Revision | B |
| Dateiformat / Größe | PDF / 436 Kb |
| Dokumentensprache | Englisch |
AD7851. TABLE OF CONTENTS
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AD7851 TABLE OF CONTENTS
FEATURES . 1 CALIBRATION SECTION . 21 GENERAL DESCRIPTION . 1 Calibration Overview . 21 PRODUCT HIGHLIGHTS . 1 Automatic Calibration on Power-On . 21 SPECIFICATIONS . 3 Self-Calibration Description . 21 TIMING SPECIFICATIONS . 5 Self-Calibration Timing . 22 TYPICAL TIMING DIAGRAMS . 6 System Calibration Description . 22 ABSOLUTE MAXIMUM RATINGS . 7 System Gain and Offset Interaction . 23 ORDERING GUIDE . 7 System Calibration Timing . 23 PINOUTS . 7 SERIAL INTERFACE SUMMARY . 24 TERMINOLOGY . 8 Resetting the Serial Interface . 24 PIN FUNCTION DESCRIPTIONS . 9 DETAILED TIMING . 25 AD7851 ON-CHIP REGISTERS . 10 Mode 1 (2-Wire 8051 Interface) . 25 Addressing the On-Chip Registers . 10 Mode 2 (3-Wire SPI/QSPI Interface Mode) . 26 Writing/Reading . 10 Mode 3 (QSPI Interface Mode) . 26 CONTROL REGISTER . 11 Mode 4 and 5 (Self-Clocking Modes) . 27 STATUS REGISTER . 12 CONFIGURING THE AD7851 . 28 CALIBRATION REGISTERS . 13 AD7851 as a Read-Only ADC . 28 Addressing the Calibration Registers . 13 Writing to the AD7851 . 29 Writing to/Reading from the Calibration Registers . 13 Interface Modes 2 and 3 Configuration . 29 Adjusting the Offset Calibration Register . 14 Interface Mode 1 Configuration . 30 Adjusting the Gain Calibration Registers . 14 Interface Modes 4 and 5 Configuration . 30 CIRCUIT INFORMATION . 15 MICROPROCESSOR INTERFACING . 31 CONVERTER DETAILS . 15 AD7851 to 8XC51/PIC17C42 Interface . 31 TYPICAL CONNECTION DIAGRAM . 15 AD7851 to 68HC11/16/L11/PIC16C42 Interface . 31 ANALOG INPUT . 16 AD7851 to ADSP-21xx Interface . 32 Acquisition Time . 16 AD7851 to DSP56000/1/2/L002 Interface . 32 DC/AC Applications . 16 AD7851 to TMS320C20/25/5x/LC5x Interface . 32 Input Ranges . 17 APPLICATIONS HINTS . 33 Transfer Functions . 17 Grounding and Layout . 33 REFERENCE SECTION . 18 Evaluating the AD7851 Performance . 33 AD7851 PERFORMANCE CURVES . 18 OUTLINE DIMENSIONS . 34 POWER-DOWN OPTIONS . 19 REVISION HISTORY . 35 POWER-UP TIMES . 20 Using an External Reference . 20 Using the Internal (On-Chip) Reference . 20 POWER VS. THROUGHPUT RATE . 20 –2– REV. B Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS SPECIFICATIONS TIMING SPECIFICATIONS TYPICAL TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS PINOUT FOR DIP, SOIC, AND SSOP ORDERING GUIDE TERMINOLOGY Integral Nonlinearity Differential Nonlinearity Total Unadjusted Error Unipolar Offset Error Positive Full-Scale Error Negative Full-Scale Error Bipolar Zero Error Track-and-Hold Acquisition Time Signal-to-(Noise + Distortion) Ratio Total Harmonic Distortion Peak Harmonic or Spurious Noise Intermodulation Distortion Power Supply Rejection Ratio (PSRR) Full Power Bandwidth (FPBW) PIN FUNCTION DESCRIPTIONS AD7851 ON-CHIP REGISTERS Addressing the On-Chip Registers Writing Reading CONTROL REGISTER STATUS REGISTER CALIBRATION REGISTERS Addressing the Calibration Registers Writing to/Reading from the Calibration Registers Adjusting the Offset Calibration Register Adjusting the Gain Calibration Register CIRCUIT INFORMATION CONVERTER DETAILS TYPICAL CONNECTION DIAGRAM ANALOG INPUT Acquisition Time DC/AC Applications Input Ranges Transfer Functions REFERENCE SECTION AD7851 PERFORMANCE CURVES POWER-DOWN OPTIONS POWER-UP TIMES Using an External Reference Using the Internal (On-Chip) Reference POWER VS. THROUGHPUT RATE CALIBRATION SECTION Calibration Overview Automatic Calibration on Power-On Self-Calibration Description Self-Calibration Timing System Calibration Description System Gain and Offset Interaction System Calibration Timing SERIAL INTERFACE SUMMARY Resetting the Serial Interface DETAILED TIMING SECTION Mode 1 (2-Wire 8051 Interface) Mode 2 (3-Wire SPI/QSPI Interface Mode) Mode 3 (QSPI Interface Mode) MODE 4 and 5 (Self-Clocking Modes) CONFIGURING THE AD7851 AD7851 as a Read-Only ADC Writing to the AD7851 Interface Modes 2 and 3 Configuration Interface Mode 1 Configuration Interface Modes 4 and 5 Configuration MICROPROCESSOR INTERFACING AD7851 to 8XC51/PIC17C42 Interface AD7851 to 68HC11/16/L11/PIC16C42 Interface AD7851 to ADSP-21xx Interface AD7851 to DSP56000/1/2/L002 Interface AD7851 to TMS320C20/25/5x/LC5x Interface APPLICATION HINTS Grounding and Layout Evaluating the AD7851 Performance AD785x Family OUTLINE DIMENSIONS Revision History
AD7851 TABLE OF CONTENTS
FEATURES . 1 CALIBRATION SECTION . 21 GENERAL DESCRIPTION . 1 Calibration Overview . 21 PRODUCT HIGHLIGHTS . 1 Automatic Calibration on Power-On . 21 SPECIFICATIONS . 3 Self-Calibration Description . 21 TIMING SPECIFICATIONS . 5 Self-Calibration Timing . 22 TYPICAL TIMING DIAGRAMS . 6 System Calibration Description . 22 ABSOLUTE MAXIMUM RATINGS . 7 System Gain and Offset Interaction . 23 ORDERING GUIDE . 7 System Calibration Timing . 23 PINOUTS . 7 SERIAL INTERFACE SUMMARY . 24 TERMINOLOGY . 8 Resetting the Serial Interface . 24 PIN FUNCTION DESCRIPTIONS . 9 DETAILED TIMING . 25 AD7851 ON-CHIP REGISTERS . 10 Mode 1 (2-Wire 8051 Interface) . 25 Addressing the On-Chip Registers . 10 Mode 2 (3-Wire SPI/QSPI Interface Mode) . 26 Writing/Reading . 10 Mode 3 (QSPI Interface Mode) . 26 CONTROL REGISTER . 11 Mode 4 and 5 (Self-Clocking Modes) . 27 STATUS REGISTER . 12 CONFIGURING THE AD7851 . 28 CALIBRATION REGISTERS . 13 AD7851 as a Read-Only ADC . 28 Addressing the Calibration Registers . 13 Writing to the AD7851 . 29 Writing to/Reading from the Calibration Registers . 13 Interface Modes 2 and 3 Configuration . 29 Adjusting the Offset Calibration Register . 14 Interface Mode 1 Configuration . 30 Adjusting the Gain Calibration Registers . 14 Interface Modes 4 and 5 Configuration . 30 CIRCUIT INFORMATION . 15 MICROPROCESSOR INTERFACING . 31 CONVERTER DETAILS . 15 AD7851 to 8XC51/PIC17C42 Interface . 31 TYPICAL CONNECTION DIAGRAM . 15 AD7851 to 68HC11/16/L11/PIC16C42 Interface . 31 ANALOG INPUT . 16 AD7851 to ADSP-21xx Interface . 32 Acquisition Time . 16 AD7851 to DSP56000/1/2/L002 Interface . 32 DC/AC Applications . 16 AD7851 to TMS320C20/25/5x/LC5x Interface . 32 Input Ranges . 17 APPLICATIONS HINTS . 33 Transfer Functions . 17 Grounding and Layout . 33 REFERENCE SECTION . 18 Evaluating the AD7851 Performance . 33 AD7851 PERFORMANCE CURVES . 18 OUTLINE DIMENSIONS . 34 POWER-DOWN OPTIONS . 19 REVISION HISTORY . 35 POWER-UP TIMES . 20 Using an External Reference . 20 Using the Internal (On-Chip) Reference . 20 POWER VS. THROUGHPUT RATE . 20 –2– REV. B Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS SPECIFICATIONS TIMING SPECIFICATIONS TYPICAL TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS PINOUT FOR DIP, SOIC, AND SSOP ORDERING GUIDE TERMINOLOGY Integral Nonlinearity Differential Nonlinearity Total Unadjusted Error Unipolar Offset Error Positive Full-Scale Error Negative Full-Scale Error Bipolar Zero Error Track-and-Hold Acquisition Time Signal-to-(Noise + Distortion) Ratio Total Harmonic Distortion Peak Harmonic or Spurious Noise Intermodulation Distortion Power Supply Rejection Ratio (PSRR) Full Power Bandwidth (FPBW) PIN FUNCTION DESCRIPTIONS AD7851 ON-CHIP REGISTERS Addressing the On-Chip Registers Writing Reading CONTROL REGISTER STATUS REGISTER CALIBRATION REGISTERS Addressing the Calibration Registers Writing to/Reading from the Calibration Registers Adjusting the Offset Calibration Register Adjusting the Gain Calibration Register CIRCUIT INFORMATION CONVERTER DETAILS TYPICAL CONNECTION DIAGRAM ANALOG INPUT Acquisition Time DC/AC Applications Input Ranges Transfer Functions REFERENCE SECTION AD7851 PERFORMANCE CURVES POWER-DOWN OPTIONS POWER-UP TIMES Using an External Reference Using the Internal (On-Chip) Reference POWER VS. THROUGHPUT RATE CALIBRATION SECTION Calibration Overview Automatic Calibration on Power-On Self-Calibration Description Self-Calibration Timing System Calibration Description System Gain and Offset Interaction System Calibration Timing SERIAL INTERFACE SUMMARY Resetting the Serial Interface DETAILED TIMING SECTION Mode 1 (2-Wire 8051 Interface) Mode 2 (3-Wire SPI/QSPI Interface Mode) Mode 3 (QSPI Interface Mode) MODE 4 and 5 (Self-Clocking Modes) CONFIGURING THE AD7851 AD7851 as a Read-Only ADC Writing to the AD7851 Interface Modes 2 and 3 Configuration Interface Mode 1 Configuration Interface Modes 4 and 5 Configuration MICROPROCESSOR INTERFACING AD7851 to 8XC51/PIC17C42 Interface AD7851 to 68HC11/16/L11/PIC16C42 Interface AD7851 to ADSP-21xx Interface AD7851 to DSP56000/1/2/L002 Interface AD7851 to TMS320C20/25/5x/LC5x Interface APPLICATION HINTS Grounding and Layout Evaluating the AD7851 Performance AD785x Family OUTLINE DIMENSIONS Revision History