Datasheet AD7890 (Analog Devices) - 5

AD7890 Parameter A Versions1 B Versions S Version Unit Test Conditions/Comments
LOGIC INPUTS Input High Voltage, VINH 2.4 2.4 2.4 V min VDD = 5 V ± 5% Input Low Voltage, VINL 0.8 0.8 0.8 V max VDD = 5 V ± 5% Input Current, IIN ±10 ±10 ±10 μA max VIN = 0 V to VDD Input Capacitance, C 5 IN 10 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH 4.0 4.0 4.0 V min ISOURCE = 200 μA Output Low Voltage, VOL 0.4 0.4 0.4 V max ISINK = 1.6 mA Serial Data Output Coding AD7890-10 Twos Complement AD7890-4 Straight (Natural) Binary AD7890-2 Straight (Natural) Binary CONVERSION RATE Conversion Time 5.9 5.9 5.9 μs max fCLK IN = 2.5 MHz, MUX OUT, connected to SHA IN Track/Hold Acquisition Time2, 5 2 2 2 μs max POWER REQUIREMENTS VDD 5 5 5 V nom ± 5% for specified performance IDD (Normal Mode) 10 10 10 mA max Logic inputs = 0 V or VDD IDD (Standby Mode)6 @ 25°C 15 15 15 μA typ Logic inputs = 0 V or VDD Power Dissipation Normal Mode 50 50 50 mW max Typically 30 mW Standby Mode @ 25°C 75 75 75 μW typ 1 Temperature ranges are as follows: A, B Versions: −40°C to +85°C; S Version: −55°C to +125°C. 2 See the Terminology section. 3 This sample rate is only achievable when using the part in external clocking mode. 4 Full-scale error match applies to positive full scale for the AD7890-2 and AD7890-4. It applies to both positive and negative full scale for the AD7890-10. 5 Sample tested @ 25°C to ensure compliance. 6 Analog inputs on AD7890-10 must be at 0 V to achieve correct power-down current. Rev. C | Page 4 of 28 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY CONTROL REGISTER THEORY OF OPERATION CONVERTER DETAILS CIRCUIT DESCRIPTION AD7890-10 Analog Input AD7890-4 Analog Input AD7890-2 Analog Input TRACK/HOLD AMPLIFIER REFERENCE TIMING AND CONTROL CEXT FUNCTIONING SERIAL INTERFACE SELF-CLOCKING MODE Write Operation EXTERNAL CLOCKING MODE Read Operation Write Operation SIMPLIFYING THE INTERFACE MICROPROCESSOR/MICROCONTROLLER INTERFACE AD7890 TO 8051 INTERFACE AD7890 TO 68HC11 INTERFACE AD7890 TO ADSP-2101 INTERFACE AD7890 TO DSP56000 INTERFACE AD7890 TO TMS320C25/30 INTERFACE ANTIALIASING FILTER PERFORMANCE LINEARITY NOISE DYNAMIC PERFORMANCE EFFECTIVE NUMBER OF BITS OUTLINE DIMENSIONS ORDERING GUIDE