Datasheet AD7608 (Analog Devices) - 7

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AD7608 Data Sheet TIMING SPECIFICATIONS
AVCC = 4.75 V to 5.25 V, VDRIVE = 2.3 V to 5.25 V, VREF = 2.5 V external reference/internal reference, TA = TMIN to TMAX, unless otherwise noted.1
Table 3. Limit at TMIN, TMAX Parameter Min Typ Max Unit Description
PARALLEL/SERIAL/BYTE MODE tCYCLE 1/throughput rate 5 µs Parallel mode, reading during or after conversion; or serial mode: VDRIVE = 3.3 V to 5.25 V, reading during a conversion using DOUTA and DOUTB lines 5 µs Serial mode reading during conversion; VDRIVE = 2.7 V 10.5 µs Serial mode reading after a conversion; VDRIVE = 2.3 V, DOUTA and DOUTB lines tCONV Conversion time 3.45 4 4.15 µs Oversampling off 7.87 9.1 µs Oversampling by 2 16.05 18.8 µs Oversampling by 4 33 39 µs Oversampling by 8 66 78 µs Oversampling by 16 133 158 µs Oversampling by 32 257 315 µs Oversampling by 64 tWAKE-UP STANDBY 100 µs E ST BY rising edge to CONVST x rising edge; power-up time from A standby mode tWAKE-UP SHUTDOWN Internal Reference 30 ms STBYE rising edge to CONVST x rising edge; power-up time from A A shutdown mode External Reference 13 ms STBYE rising edge to CONVST x rising edge; power-up time from A A shutdown mode tRESET 50 ns RESET high pulse width tOS_SETUP 20 ns BUSY to OS x pin setup time tOS_HOLD 20 ns BUSY to OS x pin hold time t1 40 ns CONVST x high to BUSY high t2 25 ns Minimum CONVST x low pulse t3 25 ns Minimum CONVST x high pulse t4 0 ns BUSY falling edge to CSE falling edge setup time A A t 2 5 0.5 ms Maximum delay al owed between CONVST A, CONVST B rising edges 10F9F t6 25 ns Maximum time between last CSE rising edge and BUSY fal ing edge A A t7 25 ns Minimum delay between RESET low to CONVST x high PARALLEL/BYTE READ OPERATION t8 0 ns CSE to RDE setup time A A A A t9 0 ns CSE to RDE hold time A A A A t10 RDE low pulse width A A 16 ns VDRIVE above 4.75 V 21 ns VDRIVE above 3.3 V 25 ns VDRIVE above 2.7 V 32 ns VDRIVE above 2.3 V t11 15 ns RDE high pulse width A A t12 22 ns CSE high pulse width (see Figure 5); CSE and RDE linked A A A A A A Rev. A | Page 6 of 32 Document Outline Features Applications Companion Products Functional Block Diagram Table of Contents Revision History General Description Specifications Timing Specifications Timing Diagrams Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Converter Details Analog Input Analog Input Ranges Analog Input Impedance Analog Input Clamp Protection Analog Input Antialiasing Filter Track-and-Hold Amplifiers ADC Transfer Function Internal/External Reference External Reference Mode Internal Reference Mode Typical Connection Diagram Power-Down Modes Conversion Control Simultaneous Sampling on All Analog Input Channels Simultaneously Sampling Two Sets of Channels Digital Interface Parallel Interface (/SER SEL = 0) Serial Interface (/SER SEL = 1) Reading During Conversion Digital Filter Layout Guidelines Outline Dimensions Ordering Guide