Datasheet AD8285 (Analog Devices) - 5

Data Sheet AD8285 DIGITAL SPECIFICATIONS
AVDD18 = AVDD18ADC = 1.8 V, AVDD33 = AVDD33x1 = AVDD33REF = 3.3 V, DVDD18 = DVDD18CLK = 1.8 V, DVDD33SPI = DVDD33CLK = DVDD33DRV = 3.3 V, 1.024 V internal ADC reference, fIN = 2.5 MHz, fSAMPLE = 72 MSPS, RS = 50 Ω, LNA + PGA gain = 34 dB, LPF cutoff = fSAMPLECH/4, full channel mode, 12-bit operation, temperature = −40°C to +105°C, unless otherwise noted.
Table 3. Parameter2 Temperature Min Typ Max Unit
CLOCK INPUTS (CLK+, CLK−) Logic Compliance CMOS/LVDS/LVPECL Differential Input Voltage3 Full 250 mV p-p Input Common-Mode Voltage Full 1.2 V Differential Input Resistance 25°C 20 kΩ Input Capacitance 25°C 1.5 pF LOGIC INPUTS (PDWN, SCLK, AUX, MUXA, ZSEL) Logic 1 Voltage Full 1.2 3.6 V Logic 0 Voltage Full 0.3 V Input Resistance 25°C 30 kΩ Input Capacitance 25°C 0.5 pF LOGIC INPUT (CS) Logic 1 Voltage Full 1.2 3.6 V Logic 0 Voltage Full 0.3 V Input Resistance 25°C 70 kΩ Input Capacitance 25°C 0.5 pF LOGIC INPUT (SDIO) Logic 1 Voltage Full 1.2 DVDD33x + 0.3 V Logic 0 Voltage Full 0 0.3 V Input Resistance 25°C 30 kΩ Input Capacitance 25°C 2 pF LOGIC OUTPUT (SDIO)4 Logic 1 Voltage (IOH = 800 μA) Full 3.0 V Logic 0 Voltage (IOL = 50 μA) Full 0.3 V LOGIC OUTPUT (Dx, DSYNC) Logic 1 Voltage (IOH = 2 mA) Full 3.0 V Logic 0 Voltage (IOL = 2 mA) Full 0.05 V 1 x stands for A, B, C, or D. 2 See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, for a complete set of definitions, and how these tests were completed. 3 Specified for LVDS and LVPECL only. 4 Specified for 13 SDIO pins sharing the same connection. Rev. B | Page 5 of 27 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS AC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION RADAR RECEIVE PATH AFE CHANNEL OVERVIEW Low Noise Amplifier (LNA) Recommendation Antialiasing Filter (AAF) Mux and Mux Controller ADC CLOCK INPUT CONSIDERATIONS CLOCK DUTY CYCLE CONSIDERATIONS CLOCK JITTER CONSIDERATIONS SDIO PIN SCLK PIN CS\ PIN RBIAS PIN VOLTAGE REFERENCE POWER AND GROUND RECOMMENDATIONS EXPOSED PADDLE THERMAL HEAT SLUG RECOMMENDATIONS SERIAL PERIPHERAL INTERFACE (SPI) HARDWARE INTERFACE MEMORY MAP READING THE MEMORY MAP TABLE LOGIC LEVELS RESERVED LOCATIONS DEFAULT VALUES APPLICATION DIAGRAMS OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS