Datasheet AD7719 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Low Voltage, Low Power, 16-/24-Bit, Dual Sigma Delta ADC |
| Pages / Page | 41 / 3 — AD7719. TABLE OF CONTENTS |
| Revision | A |
| File Format / Size | PDF / 538 Kb |
| Document Language | English |
AD7719. TABLE OF CONTENTS
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AD7719 TABLE OF CONTENTS
FEATURES . 1 Main ADC Offset Calibration Coefficient Registers (OF0): GENERAL DESCRIPTION . 1 (A3, A2, A1, A0 = 1, 0, 0, 0; SPECIFICATIONS . 3 Power-On Reset = 0x80 0000) . 26 ABSOLUTE MAXIMUM RATINGS . 6 Aux ADC Offset Calibration Coefficient Registers (OF1): ORDERING GUIDE . 6 (A3, A2, A1, A0 = 1, 0, 0, 1; TIMING CHARACTERISTICS . 7 Power-On Reset = 0x8000) . 26 DIGITAL INTERFACE . 8 Main ADC Gain Calibration Coefficient Registers (GNO): PIN CONFIGURATION . 9 (A3, A2, A1, A0 = 1, 0, 1, 0; PIN FUNCTION DESCRIPTIONS . 9 Power-On Reset = 0x5X XXX5) . 26 TYPICAL PERFORMANCE CHARACTERISTICS . 11 Aux ADC Gain Calibration Coefficient Registers (GN1): DUAL-CHANNEL ADC CIRCUIT INFORMATION . 12 (A3, A2, A1, A0 = 1, 0, 1, 1; Overview . 12 Power-On Reset = 0x59XX) . 26 Main Channel . 12 ID Register (ID): (A3, A2, A1, A0 = 1, 1, 1, 1; Auxiliary Channel . 12 Power-On Reset = 0x0X) . 26 Both Channels . 13 User Nonprogrammable Test Registers . 26 MAIN AND AUXILIARY ADC NOISE CONFIGURING THE AD7719 . 27 PERFORMANCE . 14 MICROCOMPUTER/MICROPROCESSOR ON-CHIP REGISTERS . 16 INTERFACING . 27 Communications Register AD7719-to-68HC11 Interface . 29 (A3, A2, A1, A0 = 0, 0, 0, 0) . 19 AD7719-to-8051 Interface . 29 Status Register (A3, A2, A1, A0 = 0, 0, 0, 0; AD7719-to-ADSP-2103/ADSP-2105 Interface . 30 Power-On Reset = 0x00) . 20 CIRCUIT DESCRIPTION . 30 Mode Register (A3, A2, A1, A0 = 0, 0, 0, 1; Analog Input Channels . 31 Power-On Reset = 0x00) . 21 Programmable Gain Amplifier . 32 Operating Characteristics when Addressing the Bipolar/Unipolar Configuration . 32 Mode and Control Registers . 22 Data Output Coding . 33 Main ADC Control Register (AD0CON): Burnout Currents . 33 (A3, A2, A1, A0 = 0, 0, 1, 0; Excitation Currents . 33 Power-On Reset = 0x07) . 22 Crystal Oscillator . 33 Aux ADC Control Registers (AD1CON): Reference Input . 33 (A3, A2, A1, A0 = 0, 0, 1, 1; Reference Detect . 34 Power-On Reset = 0x01) . 23 Reset Input . 34 Filter Register (A3, A2, A1, A0 = 0, 1, 0, 0; Power-Down Mode . 34 Power-On Reset = 0x45) . 24 Idle Mode . 34 I/O and Current Source Control Register (IOCON): ADC Disable Mode . 34 (A3, A2, A1, A0 = 0, 1, 1, 1; Calibration . 34 Power-On Reset = 0x0000) . 24 Grounding and Layout . 35 Main ADC Data Result Registers (DATA0): APPLICATIONS . 35 (A3, A2, A1, A0 = 0, 1, 0, 1; Pressure Measurement . 36 Power-On Reset = 0x00 0000) . 26 Temperature Measurement . 36 Aux ADC Data Result Registers (DATA1): 3-Wire RTD Configurations . 37 (A3, A2, A1, A0 = 0, 1, 1, 0; Smart Transmitters . 38 Power-On Reset = 0x0000) . 26 OUTLINE DIMENSIONS . 39 REVISION HISTORY . 40 –2– REV. A Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE TIMING CHARACTERISTICS DIGITAL INTERFACE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS Typical Performance Characteristics DUAL-CHANNEL ADC CIRCUIT INFORMATION Overview Main Channel Auxiliary Channel Both Channels MAIN AND AUXILIARY ADC NOISE PERFORMANCE ON-CHIP REGISTERS Communications Register (A3, A2, A1, A0 = 0, 0, 2, 0) Status Register (A3, A2, A1, A0 = 0, 0, 0, 0; Power-On Reset = 0x00) Mode Register (A3, A2, A1, A0 = 0, 0, 0, 1; Power-On Reset = 0x00) Operating Characteristics when Addressing the Mode and Control Registers Main ADC Control Register (AD0CON): (A3, A2, A1, A0 = 0, 0, 1, 0; Power-On Reset = 0x07) Aux ADC Control Registers (AD1CON): (A3, A2, A1, A0 = 0, 0, 1, 1; Power-On Reset = 0x00) Filter Register (A3, A2, A1, A0 = 0, 1, 0, 0; Power-On Reset = 0x45) I/O and Current Source Control Register (IOCON): (A3, A2, A1, A0 = 0, 1, 1, 1; Power-On Reset = 0x0000) Main ADC Data Result Registers (DATA0): (A3, A2, A1, A0 = 0, 1, 0, 1; Power-On Reset = 0x00 0000) Aux ADC Data Result Registers (DATA1): (A3, A2, A1, A0 = 0, 1, 1, 0; Power-On Reset = 0x0000) Main ADC Offset Calibration Coefficient Registers (OF0): (A3, A2, A1, A0 = 1, 0, 0, 0; Power-On Reset = 0x80 0000) Aux ADC Offset Calibration Coefficient Registers (OF1): (A3, A2, A1, A0 = 1, 0, 0, 1; Power-On Reset = 0x8000) Main ADC Gain Calibration Coefficient Registers (GNO): (A3, A2, A1, A0 = 1, 0, 1, 0; Power-On Reset = 0x5X XXX5) Aux ADC Gain Calibration Coefficient Registers (GN1): (A3, A2, A1, A0 = 1, 0, 1, 1; Power-On Reset = 0x59XX) ID Register (ID): (A3, A2, A1, A0 = 1, 1, 1, 1; Power-On Reset = 0x0X) User Nonprogrammable Test Registers CONFIGURING THE AD7719 MICROCOMPUTER/MICROPROCESSOR INTERFACING AD7719-to-68HC11 Interface AD7719-to-8xC51 Interface AD7719-to-ADSP-2103/ADSP-2105 Interface CIRCUIT DESCRIPTION Analog Input Channels Programmable Gain Amplifier Bipolar/Unipolar Configuration Data Output Coding Burnout Currents Excitation Currents Crystal Oscillator Reference Input Reference Detect Reset Input Power-Down Mode Idle Mode ADC Disable Mode Calibration Grounding and Layout APPLICATIONS Pressure Measurement Temperature Measurement 3-Wire RTD Configurations Smart Transmitters OUTLINE DIMENSIONS Revision History
AD7719 TABLE OF CONTENTS
FEATURES . 1 Main ADC Offset Calibration Coefficient Registers (OF0): GENERAL DESCRIPTION . 1 (A3, A2, A1, A0 = 1, 0, 0, 0; SPECIFICATIONS . 3 Power-On Reset = 0x80 0000) . 26 ABSOLUTE MAXIMUM RATINGS . 6 Aux ADC Offset Calibration Coefficient Registers (OF1): ORDERING GUIDE . 6 (A3, A2, A1, A0 = 1, 0, 0, 1; TIMING CHARACTERISTICS . 7 Power-On Reset = 0x8000) . 26 DIGITAL INTERFACE . 8 Main ADC Gain Calibration Coefficient Registers (GNO): PIN CONFIGURATION . 9 (A3, A2, A1, A0 = 1, 0, 1, 0; PIN FUNCTION DESCRIPTIONS . 9 Power-On Reset = 0x5X XXX5) . 26 TYPICAL PERFORMANCE CHARACTERISTICS . 11 Aux ADC Gain Calibration Coefficient Registers (GN1): DUAL-CHANNEL ADC CIRCUIT INFORMATION . 12 (A3, A2, A1, A0 = 1, 0, 1, 1; Overview . 12 Power-On Reset = 0x59XX) . 26 Main Channel . 12 ID Register (ID): (A3, A2, A1, A0 = 1, 1, 1, 1; Auxiliary Channel . 12 Power-On Reset = 0x0X) . 26 Both Channels . 13 User Nonprogrammable Test Registers . 26 MAIN AND AUXILIARY ADC NOISE CONFIGURING THE AD7719 . 27 PERFORMANCE . 14 MICROCOMPUTER/MICROPROCESSOR ON-CHIP REGISTERS . 16 INTERFACING . 27 Communications Register AD7719-to-68HC11 Interface . 29 (A3, A2, A1, A0 = 0, 0, 0, 0) . 19 AD7719-to-8051 Interface . 29 Status Register (A3, A2, A1, A0 = 0, 0, 0, 0; AD7719-to-ADSP-2103/ADSP-2105 Interface . 30 Power-On Reset = 0x00) . 20 CIRCUIT DESCRIPTION . 30 Mode Register (A3, A2, A1, A0 = 0, 0, 0, 1; Analog Input Channels . 31 Power-On Reset = 0x00) . 21 Programmable Gain Amplifier . 32 Operating Characteristics when Addressing the Bipolar/Unipolar Configuration . 32 Mode and Control Registers . 22 Data Output Coding . 33 Main ADC Control Register (AD0CON): Burnout Currents . 33 (A3, A2, A1, A0 = 0, 0, 1, 0; Excitation Currents . 33 Power-On Reset = 0x07) . 22 Crystal Oscillator . 33 Aux ADC Control Registers (AD1CON): Reference Input . 33 (A3, A2, A1, A0 = 0, 0, 1, 1; Reference Detect . 34 Power-On Reset = 0x01) . 23 Reset Input . 34 Filter Register (A3, A2, A1, A0 = 0, 1, 0, 0; Power-Down Mode . 34 Power-On Reset = 0x45) . 24 Idle Mode . 34 I/O and Current Source Control Register (IOCON): ADC Disable Mode . 34 (A3, A2, A1, A0 = 0, 1, 1, 1; Calibration . 34 Power-On Reset = 0x0000) . 24 Grounding and Layout . 35 Main ADC Data Result Registers (DATA0): APPLICATIONS . 35 (A3, A2, A1, A0 = 0, 1, 0, 1; Pressure Measurement . 36 Power-On Reset = 0x00 0000) . 26 Temperature Measurement . 36 Aux ADC Data Result Registers (DATA1): 3-Wire RTD Configurations . 37 (A3, A2, A1, A0 = 0, 1, 1, 0; Smart Transmitters . 38 Power-On Reset = 0x0000) . 26 OUTLINE DIMENSIONS . 39 REVISION HISTORY . 40 –2– REV. A Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE TIMING CHARACTERISTICS DIGITAL INTERFACE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS Typical Performance Characteristics DUAL-CHANNEL ADC CIRCUIT INFORMATION Overview Main Channel Auxiliary Channel Both Channels MAIN AND AUXILIARY ADC NOISE PERFORMANCE ON-CHIP REGISTERS Communications Register (A3, A2, A1, A0 = 0, 0, 2, 0) Status Register (A3, A2, A1, A0 = 0, 0, 0, 0; Power-On Reset = 0x00) Mode Register (A3, A2, A1, A0 = 0, 0, 0, 1; Power-On Reset = 0x00) Operating Characteristics when Addressing the Mode and Control Registers Main ADC Control Register (AD0CON): (A3, A2, A1, A0 = 0, 0, 1, 0; Power-On Reset = 0x07) Aux ADC Control Registers (AD1CON): (A3, A2, A1, A0 = 0, 0, 1, 1; Power-On Reset = 0x00) Filter Register (A3, A2, A1, A0 = 0, 1, 0, 0; Power-On Reset = 0x45) I/O and Current Source Control Register (IOCON): (A3, A2, A1, A0 = 0, 1, 1, 1; Power-On Reset = 0x0000) Main ADC Data Result Registers (DATA0): (A3, A2, A1, A0 = 0, 1, 0, 1; Power-On Reset = 0x00 0000) Aux ADC Data Result Registers (DATA1): (A3, A2, A1, A0 = 0, 1, 1, 0; Power-On Reset = 0x0000) Main ADC Offset Calibration Coefficient Registers (OF0): (A3, A2, A1, A0 = 1, 0, 0, 0; Power-On Reset = 0x80 0000) Aux ADC Offset Calibration Coefficient Registers (OF1): (A3, A2, A1, A0 = 1, 0, 0, 1; Power-On Reset = 0x8000) Main ADC Gain Calibration Coefficient Registers (GNO): (A3, A2, A1, A0 = 1, 0, 1, 0; Power-On Reset = 0x5X XXX5) Aux ADC Gain Calibration Coefficient Registers (GN1): (A3, A2, A1, A0 = 1, 0, 1, 1; Power-On Reset = 0x59XX) ID Register (ID): (A3, A2, A1, A0 = 1, 1, 1, 1; Power-On Reset = 0x0X) User Nonprogrammable Test Registers CONFIGURING THE AD7719 MICROCOMPUTER/MICROPROCESSOR INTERFACING AD7719-to-68HC11 Interface AD7719-to-8xC51 Interface AD7719-to-ADSP-2103/ADSP-2105 Interface CIRCUIT DESCRIPTION Analog Input Channels Programmable Gain Amplifier Bipolar/Unipolar Configuration Data Output Coding Burnout Currents Excitation Currents Crystal Oscillator Reference Input Reference Detect Reset Input Power-Down Mode Idle Mode ADC Disable Mode Calibration Grounding and Layout APPLICATIONS Pressure Measurement Temperature Measurement 3-Wire RTD Configurations Smart Transmitters OUTLINE DIMENSIONS Revision History
