Datasheet AD7631 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | 18-Bit, 250 kSPS, Differential Programmable Input PulSAR® ADC |
| Seiten / Seite | 33 / 6 — Data Sheet. AD7631. TIMING SPECIFICATIONS. Table 3. Parameter Symbol. … |
| Revision | B |
| Dateiformat / Größe | PDF / 674 Kb |
| Dokumentensprache | Englisch |
Data Sheet. AD7631. TIMING SPECIFICATIONS. Table 3. Parameter Symbol. Min. Typ. Max. Unit
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Data Sheet AD7631 TIMING SPECIFICATIONS
AVDD = DVDD = 5 V; OVDD = 2.7 V to 5.5 V; VCC = 15 V; VEE = −15 V; VREF = 5 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 3. Parameter Symbol Min Typ Max Unit
CONVERSION AND RESET (See Figure 35 and Figure 36) Convert Pulse Width t1 10 ns Time Between Conversions t2 4.0 μs CNVST Low to BUSY High Delay t3 35 ns BUSY High All Modes (Except Master Serial Read After Convert) t4 1.68 μs Aperture Delay t5 2 ns End of Conversion to BUSY Low Delay t6 10 ns Conversion Time t7 1.68 μs Acquisition Time t8 2.32 ns RESET Pulse Width t9 10 ns PARALLEL INTERFACE MODES (See Figure 37 and Figure 39) CNVST Low to DATA Valid Delay t10 1.65 μs DATA Valid to BUSY Low Delay t11 20 ns Bus Access Request to DATA Valid t12 40 ns Bus Relinquish Time t13 2 15 ns MASTER SERIAL INTERFACE MODES1 (See Figure 41 and Figure 42) CS Low to SYNC Valid Delay t14 10 ns CS Low to Internal SDCLK Valid Delay1 t15 10 ns CS Low to SDOUT Delay t16 10 ns CNVST Low to SYNC Delay, Read During Convert t17 530 ns SYNC Asserted to SDCLK First Edge Delay t18 3 ns Internal SDCLK Period2 t19 30 45 ns Internal SDCLK High2 t20 15 ns Internal SDCLK Low2 t21 10 ns SDOUT Valid Setup Time2 t22 4 ns SDOUT Valid Hold Time2 t23 5 ns SDCLK Last Edge to SYNC Delay2 t24 5 ns CS High to SYNC HIGH-Z t25 10 ns CS High to Internal SDCLK HIGH-Z t26 10 ns CS High to SDOUT HIGH-Z t27 10 ns BUSY High in Master Serial Read After Convert2 t28 See Table 4 CNVST Low to SYNC Delay, Read After Convert t29 1.5 μs SYNC Deasserted to BUSY Low Delay t30 25 ns SLAVE SERIAL/SERIAL CONFIGURATION INTERFACE MODES1 (See Figure 44, Figure 45, and Figure 47) External SDCLK, SCCLK Setup Time t31 5 ns External SDCLK Active Edge to SDOUT Delay t32 2 18 ns SDIN/SCIN Setup Time t33 5 ns SDIN/SCIN Hold Time t34 5 ns External SDCLK/SCCLK Period t35 25 ns External SDCLK/SCCLK High t36 10 ns External SDCLK/SCCLK Low t37 10 ns 1 In serial interface modes, the SYNC, SDSCLK, and SDOUT timings are defined with a maximum load CL of 10 pF; otherwise, the load is 60 pF maximum. 2 In serial master read during convert mode. See Table 4 for serial master read after convert mode. Rev. B | Page 5 of 32 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION OVERVIEW CONVERTER OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS Input Range Selection Input Structure Single-to-Differential Driver VOLTAGE REFERENCE INPUT/OUTPUT Internal Reference (REF = 5 V)(PDREF = Low, PDBUF = Low) External 2.5 V Reference and Internal Buffer (REF = 5 V)(PDREF = High, PDBUF = Low) External 5 V Reference (PDREF = High, PDBUF = High) Reference Decoupling Temperature Sensor POWER SUPPLIES Core Supplies High Voltage Supplies Digital Output Supply Power Sequencing Power Dissipation vs. Throughput Power Down CONVERSION CONTROL INTERFACES DIGITAL INTERFACE RESET PARALLEL INTERFACE Master Parallel Interface Slave Parallel Interface 18-Bit Interface (Master or Slave) 16-Bit and 8-Bit Interface (Master or Slave) SERIAL INTERFACE Data Interface Serial Configuration Interface MASTER SERIAL INTERFACE Internal Clock (MODE[1:0] = 3, EXT/ = Low) Read During Convert (RDC = High) Read After Convert (RDC = Low, DIVSCLK[1:0] = [0 to 3]) SLAVE SERIAL INTERFACE External Clock (MODE[1:0] = 3, EXT/ = High) External Discontinuous Clock Data Read After Conversion Daisy-Chain Feature External Clock Data Read During Previous Conversion External Clock Data Read After/During Conversion HARDWARE CONFIGURATION SOFTWARE CONFIGURATION MICROPROCESSOR INTERFACING SPI Interface APPLICATION INFORMATION LAYOUT GUIDELINES EVALUATING PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE
Data Sheet AD7631 TIMING SPECIFICATIONS
AVDD = DVDD = 5 V; OVDD = 2.7 V to 5.5 V; VCC = 15 V; VEE = −15 V; VREF = 5 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 3. Parameter Symbol Min Typ Max Unit
CONVERSION AND RESET (See Figure 35 and Figure 36) Convert Pulse Width t1 10 ns Time Between Conversions t2 4.0 μs CNVST Low to BUSY High Delay t3 35 ns BUSY High All Modes (Except Master Serial Read After Convert) t4 1.68 μs Aperture Delay t5 2 ns End of Conversion to BUSY Low Delay t6 10 ns Conversion Time t7 1.68 μs Acquisition Time t8 2.32 ns RESET Pulse Width t9 10 ns PARALLEL INTERFACE MODES (See Figure 37 and Figure 39) CNVST Low to DATA Valid Delay t10 1.65 μs DATA Valid to BUSY Low Delay t11 20 ns Bus Access Request to DATA Valid t12 40 ns Bus Relinquish Time t13 2 15 ns MASTER SERIAL INTERFACE MODES1 (See Figure 41 and Figure 42) CS Low to SYNC Valid Delay t14 10 ns CS Low to Internal SDCLK Valid Delay1 t15 10 ns CS Low to SDOUT Delay t16 10 ns CNVST Low to SYNC Delay, Read During Convert t17 530 ns SYNC Asserted to SDCLK First Edge Delay t18 3 ns Internal SDCLK Period2 t19 30 45 ns Internal SDCLK High2 t20 15 ns Internal SDCLK Low2 t21 10 ns SDOUT Valid Setup Time2 t22 4 ns SDOUT Valid Hold Time2 t23 5 ns SDCLK Last Edge to SYNC Delay2 t24 5 ns CS High to SYNC HIGH-Z t25 10 ns CS High to Internal SDCLK HIGH-Z t26 10 ns CS High to SDOUT HIGH-Z t27 10 ns BUSY High in Master Serial Read After Convert2 t28 See Table 4 CNVST Low to SYNC Delay, Read After Convert t29 1.5 μs SYNC Deasserted to BUSY Low Delay t30 25 ns SLAVE SERIAL/SERIAL CONFIGURATION INTERFACE MODES1 (See Figure 44, Figure 45, and Figure 47) External SDCLK, SCCLK Setup Time t31 5 ns External SDCLK Active Edge to SDOUT Delay t32 2 18 ns SDIN/SCIN Setup Time t33 5 ns SDIN/SCIN Hold Time t34 5 ns External SDCLK/SCCLK Period t35 25 ns External SDCLK/SCCLK High t36 10 ns External SDCLK/SCCLK Low t37 10 ns 1 In serial interface modes, the SYNC, SDSCLK, and SDOUT timings are defined with a maximum load CL of 10 pF; otherwise, the load is 60 pF maximum. 2 In serial master read during convert mode. See Table 4 for serial master read after convert mode. Rev. B | Page 5 of 32 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION OVERVIEW CONVERTER OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS Input Range Selection Input Structure Single-to-Differential Driver VOLTAGE REFERENCE INPUT/OUTPUT Internal Reference (REF = 5 V)(PDREF = Low, PDBUF = Low) External 2.5 V Reference and Internal Buffer (REF = 5 V)(PDREF = High, PDBUF = Low) External 5 V Reference (PDREF = High, PDBUF = High) Reference Decoupling Temperature Sensor POWER SUPPLIES Core Supplies High Voltage Supplies Digital Output Supply Power Sequencing Power Dissipation vs. Throughput Power Down CONVERSION CONTROL INTERFACES DIGITAL INTERFACE RESET PARALLEL INTERFACE Master Parallel Interface Slave Parallel Interface 18-Bit Interface (Master or Slave) 16-Bit and 8-Bit Interface (Master or Slave) SERIAL INTERFACE Data Interface Serial Configuration Interface MASTER SERIAL INTERFACE Internal Clock (MODE[1:0] = 3, EXT/ = Low) Read During Convert (RDC = High) Read After Convert (RDC = Low, DIVSCLK[1:0] = [0 to 3]) SLAVE SERIAL INTERFACE External Clock (MODE[1:0] = 3, EXT/ = High) External Discontinuous Clock Data Read After Conversion Daisy-Chain Feature External Clock Data Read During Previous Conversion External Clock Data Read After/During Conversion HARDWARE CONFIGURATION SOFTWARE CONFIGURATION MICROPROCESSOR INTERFACING SPI Interface APPLICATION INFORMATION LAYOUT GUIDELINES EVALUATING PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE