Datasheet AD7911, AD7921 (Analog Devices) - 6

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AD7911/AD7921 Parameter A Grade1 Unit Test Conditions/Comments
CONVERSION RATE Conversion Time 3.2 μs max 16 SCLK cycles with SCLK at 5 MHz Track-and-Hold Acquisition Time2 290 ns max Throughput Rate 250 kSPS max See the Serial Interface section POWER REQUIREMENTS VDD 2.35/5.25 V min/max IDD Digital I/Ps = 0 V or VDD Normal Mode (Static) 3 mA typ VDD = 4.75 V to 5.25 V, SCLK on or off 1.5 mA typ VDD = 2.35 V to 3.6 V, SCLK on or off Normal Mode (Operational) 4 mA max VDD = 4.75 V to 5.25 V, fSAMPLE = 250 kSPS 2 mA max VDD = 2.35 V to 3.6 V, fSAMPLE = 250 kSPS Full Power-Down Mode (Static) 1 μA max SCLK on or off, typically 50 nA Full Power-Down Mode (Dynamic) 0.4 mA typ VDD = 5 V, fSCLK = 5 MHz, fSAMPLE = 25 kSPS 0.22 mA typ VDD = 3 V, fSCLK = 5 MHz, fSAMPLE = 25 kSPS Power Dissipation4 Normal Mode (Operational) 20 mW max VDD = 5 V, fSAMPLE = 250 kSPS 6 mW max VDD = 3 V, fSAMPLE = 250 kSPS Full Power-Down 5 μW max VDD = 5 V 3 μW max VDD = 3 V 1 Operational from VDD = 2 V, with VIH = 1.9 V minimum and VIL = 0.1 V maximum. 2 See the Terminology section. 3 Guaranteed by characterization. 4 See the Power vs. Throughput Rate section. Rev. A | Page 6 of 28 Document Outline REVISION HISTORY SPECIFICATIONS AD7911 SPECIFICATIONS AD7921 SPECIFICATIONS TIMING SPECIFICATIONS TIMING DIAGRAMS TIMING EXAMPLES Timing Example 1 Timing Example 2 ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT DIGITAL INPUTS DIN INPUT DOUT OUTPUT MODES OF OPERATION NORMAL MODE POWER-DOWN MODE POWER-UP TIME POWER VS. THROUGHPUT RATE SERIAL INTERFACE MICROPROCESSOR INTERFACING AD7911/AD7921 to TMS320C541 Interface AD7911/AD7921 to ADSP-218x AD7911/AD7921 to DSP563xx Interface APPLICATION HINTS GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE