Datasheet AD7910, AD7920 (Analog Devices) - 5

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AD7910/AD7920 Parameter1 A Grade , 1 2 B Grade1 , 2 Unit Test Conditions/Comments
LOGIC INPUTS Input High Voltage, VINH 2.4 2.4 V min 1.8 1.8 V min VDD = 2.35 V Input Low Voltage, VINL 0.8 0.8 V max VDD = 3.6 V to 5.25 V 0.4 0.4 V max VDD = 2.35 V to 3.6 V Input Current, IIN, SCLK Pin ±0.5 ±0.5 μA max Typically 10 nA, VIN = 0 V or VDD Input Current, IIN, CS Pin ±10 ±10 nA typ Input Capacitance, C 6 IN 5 5 pF max LOGIC OUTPUTS Output High Voltage, VOH VDD − 0.2 VDD − 0.2 V min ISOURCE = 200 μA, VDD = 2.35 V to 5.25 V Output Low Voltage, VOL 0.4 0.4 V max ISINK = 200 μA Floating-State Leakage Current ±1 ±1 μA max Floating-State Output Capacitance6 5 5 pF max Output Coding Straight (natural) binary CONVERSION RATE Conversion Time 3.2 3.2 μs max 16 SCLK cycles with SCLK at 5 MHz Track-and-Hold Acquisition Time3 250 250 ns max Throughput Rate 250 250 kSPS max See the Serial Interface section POWER REQUIREMENTS VDD 2.35/5.25 2.35/5.25 V min/max IDD Digital I/Ps = 0 V or VDD Normal Mode (Static) 2.5 2.5 mA typ VDD = 4.75 V to 5.25 V, SCLK on or off 1.2 1.2 mA typ VDD = 2.35 V to 3.6 V, SCLK on or off Normal Mode (Operational) 3 3 mA max VDD = 4.75 V to 5.25 V, fSAMPLE = 250 kSPS 1.4 1.4 mA max VDD = 2.35 V to 3.6 V, fSAMPLE = 250 kSPS Full Power-Down Mode 1 1 μA max Typically 50 nA Power Dissipation7 Normal Mode (Operational) 15 15 mW max VDD = 5 V, fSAMPLE = 250 kSPS 4.2 4.2 mW max VDD = 3 V, fSAMPLE = 250 kSPS Full Power-Down 5 5 μW max VDD = 5 V 3 3 μW max VDD = 3 V 1 Temperature range from −40°C to +85°C. 2 Operational from VDD = 2.0 V, with input low voltage (VINL) 0.35 V max. 3 See the Terminology section. 4 B Grade, maximum specifications apply as typical figures when VDD = 4.75 V to 5.25 V. 5 SC70 values guaranteed by characterization. 6 Guaranteed by characterization. 7 See the Power vs. Throughput Rate section. Rev. C | Page 5 of 24 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS SPECIFICATIONS AD7910 AD7920 TIMING SPECIFICATIONS TIMING EXAMPLES TIMING EXAMPLE 1 TIMING EXAMPLE 2 ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT DIGITAL INPUTS MODES OF OPERATION NORMAL MODE POWER-DOWN MODE POWER-UP TIME POWER VS. THROUGHPUT RATE SERIAL INTERFACE MICROPROCESSOR INTERFACING AD7910/AD7920 TO TMS320C541 INTERFACE AD7910/AD7920 TO ADSP-218x AD7910/AD7920 TO DSP563xx INTERFACE APPLICATION HINTS GROUNDING AND LAYOUT EVALUATING PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE