Datasheet LTC2480 (Analog Devices) - 6

LTC2480
TIMING CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
tLESCK External SCK Low Period (Note 10) l 125 ns tHESCK External SCK High Period (Note 10) l 125 ns tDOUT_ISCK Internal SCK 24-Bit Data Output Time Internal Oscillator (Notes 10, 12) l 0.61 0.625 0.64 ms External Oscillator (Notes 10, 11) l 192/fEOSC (in kHz) ms tDOUT_ESCK External SCK 24-Bit Data Output Time (Note 10) l 24/fESCK (in kHz) ms t1 CS↓ to SDO Low l 0 200 ns t2 CS↑ to SDO High Z l 0 200 ns t3 CS↓ to SCK↓ Internal SCK Mode l 0 200 ns t4 CS↓ to SCK↑ External SCK Mode l 50 ns tKQMAX SCK↓ to SDO Valid l 200 ns tKQMIN SDO Hold After SCK↓ (Note 5) l 15 ns t5 SCK Set-Up Before CS↓ l 50 ns t6 SCK Hold After CS↓ l 50 ns t7 SDI Setup Before SCK↑ (Note 5) l 100 ns t8 SDI Hold After SCK↑ (Note 5) l 100 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
60Hz mode (internal oscillator) or fEOSC = 307.2kHz ±2% (external may cause permanent damage to the device. Exposure to any Absolute oscillator). Maximum Rating condition for extended periods may affect device
Note 9:
Simultaneous 50Hz/60Hz mode (internal oscillator) or fEOSC = reliability and lifetime. 280kHz ±2% (external oscillator).
Note 2:
All voltage values are with respect to GND.
Note 10:
The SCK can be configured in external SCK mode or internal SCK
Note 3:
VCC = 2.7V to 5.5V unless otherwise specified. mode. In external SCK mode, the SCK pin is used as digital input and the V driving clock is f REFCM = VREF/2, FS = 0.5VREF/GAIN ESCK. In internal SCK mode, the SCK pin is used as digital V output and the output clock signal during the data output is f IN = IN+ – IN–, VIN(CM) = (IN+ + IN–)/2 ISCK.
Note 4:
Use internal conversion clock or external conversion clock source
Note 11:
The external oscillator is connected to the fO pin. The external with f oscillator frequency, f EOSC = 307.2kHz unless otherwise specified. EOSC, is expressed in kHz.
Note 5:
Guaranteed by design, not subject to test.
Note 12:
The converter uses the internal oscillator.
Note 6:
Integral nonlinearity is defined as the deviation of a code from a
Note 13:
The output noise includes the contribution of the internal straight line passing through the actual endpoints of the transfer curve. calibration operations. The deviation is measured from the center of the quantization band.
Note 14:
Guaranteed by design and test correlation.
Note 7:
50Hz mode (internal oscillator) or f
Note 15:
Refer to Applications Information section for performance vs EOSC = 256kHz ±2% (external oscillator). data rate graphs.
Note 16:
For VCC < 3V, VIH is 2.5V for pin fO. 2480fe 6 For more information www.linear.com/LTC2480 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics (Normal Speed) Electrical Characteristics (2X Speed) Converter Characteristics Analog Input and Reference Analog Inputs and Digital Outputs Power Requirements Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Timing Diagrams Applications Information Package Description Revision History Typical Application Related Parts