Datasheet AD7723 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | 16-Bit, 1.2 MSPS, CMOS Sigma-Delta ADC |
| Seiten / Seite | 33 / 7 — AD7723. TIMING SPECIFICATIONS. Table 2. Parameter Symbol. Min. Typ. Max. … |
| Revision | C |
| Dateiformat / Größe | PDF / 555 Kb |
| Dokumentensprache | Englisch |
AD7723. TIMING SPECIFICATIONS. Table 2. Parameter Symbol. Min. Typ. Max. Unit. IOL 1.6mA. OUTPUT. 1.6V. PIN. 50pF. IOH 200
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AD7723 TIMING SPECIFICATIONS
AVDD = DVDD = 5 V ± 5%; AGND = AGND1 = DGND = 0 V; fCLKIN = 19.2 MHz; CL = 50 pF; SFMT = logic low or high, CFMT = logic low or high; TA = TMIN to TMAX, unless otherwise noted.
Table 2. Parameter Symbol Min Typ Max Unit
CLKIN Frequency fCLK 1 19.2 MHz CLKIN Period (tCLK – 1/fCLK) t1 0.052 1 µs CLKIN Low Pulse Width t2 0.45 × t1 0.55 × t1 CLKIN High Pulse Width t3 0.45 × t1 0.55 × t1 CLKIN Rise Time t4 5 ns CLKIN Fall Time t5 5 ns FSI Setup Time t6 0 5 ns FSI Hold Time t7 0 5 ns FSI High Time1 t8 1 tCLK CLKIN to SCO Delay t9 25 40 ns SCO Period2, SCR = 1 t10 2 tCLK SCO Period2, SCR = 0 t10 1 tCLK SCO Transition to FSO High Delay t11 0 5 ns SCO Transition to FSO Low Delay t12 0 5 ns SCO Transition to SDO Valid Delay t13 5 12 ns SCO Transition from FSI3 t14 60 tCLK + t2 SDO Enable Delay Time t15 5 20 ns SDO Disable Delay Time t16 5 20 ns DRDY High Time2 t17 2 tCLK Conversion Time2 (Refer to Table 3 and Table 4) t18 16/32 tCLK CLKIN to DRDY Transition t19 35 50 ns CLKIN to DATA Valid t20 20 35 ns CS/RD Setup Time to CLKIN t21 0 ns CS/RD Hold Time to CLKIN t22 20 ns Data Access Time t23 20 35 ns Bus Relinquish Time t24 20 35 ns SYNC Input Pulse Width t25 1 tCLK SYNC Low Time before CLKIN Rising t26 0 ns DRDY High Delay after Rising SYNC t27 25 35 ns DRDY Low Delay after SYNC Low t28 2049 tCLK 1 FSO pulses are gated by the release of FSI (going low). 2 Guaranteed by design. 3 Frame sync is initiated on the falling edge of CLKIN.
IOL 1.6mA TO OUTPUT 1.6V PIN CL 50pF IOH 200
µ
A
01186-002 Figure 2. Load Circuit for Timing Specifications Rev. C | Page 6 of 32 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION APPLYING THE AD7723 ANALOG INPUT RANGE ANALOG INPUT DRIVING THE ANALOG INPUTS APPLYING THE REFERENCE CLOCK GENERATION SYSTEM SYNCHRONIZATION DATA INTERFACING PARALLEL INTERFACE SERIAL INTERFACE TWO-CHANNEL MULTIPLEXED OPERATION SERIAL INTERFACE TO DSPs AD7723 TO ADSP-21xx INTERFACE AD7723 TO SHARC INTERFACE AD7723 TO DSP56002 INTERFACE AD7723 TO TMS320C5x INTERFACE GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE
AD7723 TIMING SPECIFICATIONS
AVDD = DVDD = 5 V ± 5%; AGND = AGND1 = DGND = 0 V; fCLKIN = 19.2 MHz; CL = 50 pF; SFMT = logic low or high, CFMT = logic low or high; TA = TMIN to TMAX, unless otherwise noted.
Table 2. Parameter Symbol Min Typ Max Unit
CLKIN Frequency fCLK 1 19.2 MHz CLKIN Period (tCLK – 1/fCLK) t1 0.052 1 µs CLKIN Low Pulse Width t2 0.45 × t1 0.55 × t1 CLKIN High Pulse Width t3 0.45 × t1 0.55 × t1 CLKIN Rise Time t4 5 ns CLKIN Fall Time t5 5 ns FSI Setup Time t6 0 5 ns FSI Hold Time t7 0 5 ns FSI High Time1 t8 1 tCLK CLKIN to SCO Delay t9 25 40 ns SCO Period2, SCR = 1 t10 2 tCLK SCO Period2, SCR = 0 t10 1 tCLK SCO Transition to FSO High Delay t11 0 5 ns SCO Transition to FSO Low Delay t12 0 5 ns SCO Transition to SDO Valid Delay t13 5 12 ns SCO Transition from FSI3 t14 60 tCLK + t2 SDO Enable Delay Time t15 5 20 ns SDO Disable Delay Time t16 5 20 ns DRDY High Time2 t17 2 tCLK Conversion Time2 (Refer to Table 3 and Table 4) t18 16/32 tCLK CLKIN to DRDY Transition t19 35 50 ns CLKIN to DATA Valid t20 20 35 ns CS/RD Setup Time to CLKIN t21 0 ns CS/RD Hold Time to CLKIN t22 20 ns Data Access Time t23 20 35 ns Bus Relinquish Time t24 20 35 ns SYNC Input Pulse Width t25 1 tCLK SYNC Low Time before CLKIN Rising t26 0 ns DRDY High Delay after Rising SYNC t27 25 35 ns DRDY Low Delay after SYNC Low t28 2049 tCLK 1 FSO pulses are gated by the release of FSI (going low). 2 Guaranteed by design. 3 Frame sync is initiated on the falling edge of CLKIN.
IOL 1.6mA TO OUTPUT 1.6V PIN CL 50pF IOH 200
µ
A
01186-002 Figure 2. Load Circuit for Timing Specifications Rev. C | Page 6 of 32 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION APPLYING THE AD7723 ANALOG INPUT RANGE ANALOG INPUT DRIVING THE ANALOG INPUTS APPLYING THE REFERENCE CLOCK GENERATION SYSTEM SYNCHRONIZATION DATA INTERFACING PARALLEL INTERFACE SERIAL INTERFACE TWO-CHANNEL MULTIPLEXED OPERATION SERIAL INTERFACE TO DSPs AD7723 TO ADSP-21xx INTERFACE AD7723 TO SHARC INTERFACE AD7723 TO DSP56002 INTERFACE AD7723 TO TMS320C5x INTERFACE GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE