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Datasheet AD7656A (Analog Devices) - 6

ПроизводительAnalog Devices
Описание250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC
Страниц / Страница29 / 6 — Data Sheet. AD7656A. TIMING SPECIFICATIONS. Table 2. Limit at TMIN, TMAX. …
Формат / Размер файлаPDF / 528 Кб
Язык документаанглийский

Data Sheet. AD7656A. TIMING SPECIFICATIONS. Table 2. Limit at TMIN, TMAX. Parameter

Data Sheet AD7656A TIMING SPECIFICATIONS Table 2 Limit at TMIN, TMAX Parameter

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Data Sheet AD7656A TIMING SPECIFICATIONS
AVCC and DVCC = 4.75 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V, VREF = 2.5 V internal/external, TA = TMIN to TMAX, unless otherwise noted. For the ±4 × VREF range, VDD = 11 V to 16.5 V, and VSS = −11 V to −16.5 V, and for the ±2 × VREF range, VDD = 6 V to 16.5 V, and VSS = −6 V to −16.5 V. Sample tested during initial release to ensure compliance. All input signals are specified with tR = tF = 5 ns (10% to 90% of VDD) and timed from a voltage level of 1.6 V.
Table 2. Limit at TMIN, TMAX Parameter VDRIVE < 4.75 V VDRIVE = 4.75 V to 5.25 V Unit Description1
PARALLEL INTERFACE MODE tCONVERT 3 3 µs typ Conversion time, internal clock tQUIET 150 150 ns min Minimum quiet time required between bus relinquish and start of next conversion tACQ 550 550 ns min Acquisition time t1 60 60 ns min CONVST x high to BUSY high t10 25 25 ns min Minimum CONVST x low pulse tWAKE-UP 2 2 ms max STBY rising edge to CONVST x rising edge, not shown in figures 25 25 µs max Partial power-down mode PARALLEL WRITE OPERATION t11 15 15 ns min WR pulse width t12 0 0 ns min CS to WR setup time t13 5 5 ns min CS to WR hold time t14 5 5 ns min Data setup time before WR rising edge t15 5 5 ns min Data hold after WR rising edge PARALLEL READ OPERATION t 2 0 0 ns min BUSY to RD delay t3 0 0 ns min CS to RD setup time t4 0 0 ns min CS to RD hold time t5 45 36 ns min RD pulse width t6 45 36 ns max Data access time after RD falling edge t7 10 10 ns min Data hold time after RD rising edge t8 12 12 ns max Bus relinquish time after RD rising edge t9 6 6 ns min Minimum time between reads SERIAL INTERFACE MODE fSCLK 18 18 MHz max Frequency of serial read clock t16 12 12 ns max Delay from CS until SDATA three-state disabled t 2 17 22 22 ns max Data access time after SCLK rising edge/CS fal ing edge t18 0.4 × tSCLK 0.4 × tSCLK ns min SCLK low pulse width t19 0.4 × tSCLK 0.4 × tSCLK ns min SCLK high pulse width t20 10 10 ns min SCLK to data valid hold time after SCLK falling edge t21 18 18 ns max CS rising edge to SDATA high impedance 1 Multifunction pin names may be referenced by their relevant function only. 2 A buffer is used on the data output pins for this measurement.
200µA IOL TO OUTPUT 1.6V PIN CL 25pF
002
200µA IOH
11127- Figure 2. Load Circuit for Digital Output Timing Specifications Rev. 0 | Page 5 of 28 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS POWER SUPPLY SEQUENCING THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CONVERTER DETAILS Track-and-Hold Amplifiers Analog Input ADC TRANSFER FUNCTION REFERENCE SECTION TYPICAL CONNECTION DIAGRAM DRIVING THE ANALOG INPUTS INTERFACE SECTION Parallel Interface (SER/PAR/SEL = 0) SOFTWARE SELECTION OF ADCS Changing the Analog Input Range (H/S SEL = 0) Changing the Analog Input Range (H/S SEL = 1) Serial Interface (SER/PAR/SEL = 1) SERIAL READ OPERATION DAISY-CHAIN MODE (DCEN = 1, SER//SEL = 1) Standby/Partial Power-Down Modes of Operation (SER/PAR/SEL = 0 or SER/PAR/SEL = 1) APPLICATION HINTS LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE
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