Datasheet LTC2122 (Analog Devices) - 4

LTC2122
INTERNAL REFERENCE CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) PARAMETER CONDITIONS MIN TYP MAX UNITS
VCM Output Voltage IOUT = 0 0.435 • 0.435 • 0.435 • V VDD – 18mV VDD VDD + 18mV VCM Output Temperature Drift ±37 ppm/°C VCM Output Resistance –1mA < IOUT < 1mA 4 Ω VREF Output Voltage IOUT = 0 1.225 1.250 1.275 V VREF Output Temperature Drift ±30 ppm/°C VREF Output Resistance –400µA < IOUT < 1mA 7 Ω VREF Line Regulation 1.7V < VDD < 1.9V 0.6 mV/V
POWER REQUIREMENTS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Analog Supply Voltage Single-Lane Operation l 1.8 1.85 1.9 V Two-Lane Operation l 1.7 1.8 1.9 V OVDD Output Supply Voltage CML Current = 16mA, Directly Terminated (Note 8) l 1.2 1.9 V CML Current = 16mA, AC Terminated l 1.4 1.9 V IVDD Analog Supply Current l 417 459 mA IOVDD Output Supply Current Per Lane CML Current = 12mA l 11 12 13.8 mA PDISS Power Dissipation VDD = 1.8V, Excluding OVDD Power l 751 826 mW PSLEEP Sleep Mode Power 2 mW PNAP Nap Mode Power 433 mW
DIGITAL INPUTS AND OUTPUTS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS CLOCK INPUTS (DEVCLK+, DEVCLK–)
VID Differential Input Voltage (Note 8) l 0.2 V VICM Common Mode Input Voltage Internally Set 1.2 V Externally Set (Note 8) l 1.1 1.5 V RIN Input Resistance (See Figure 2) 10 kΩ CIN Input Capacitance 2 pF
Differential Digital Inputs (SYNC~+, SYNC~–, SYSREF+, SYSREF–)
VID Differential Input Voltage (Note 8) l 0.2 V VICM Common Mode Input Voltage Internally Set 1.2 V Externally Set (Note 8) l 1.1 1.5 V RIN Input Resistance 6.7 kΩ CIN Input Capacitance 2 pF 2122fb 4 For more information www.linear.com/LTC2122 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Power Requirements Digital Inputs And Outputs Digital Inputs And Outputs Timing characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram SPI Timing Definitions ADC PERFORMANCE TERMS SERIAL INTERFACE TERMS Applications Information CONVERTER OPERATION INPUT DRIVE CIRCUITS GROUNDING AND BYPASSING HEAT TRANSFER Typical Applications Package Description Revision History Typical Application Related Parts