Datasheet LTC2415, LTC2415-1 (Analog Devices) - 5

LTC2415/LTC2415-1
TIMING CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3,4) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fEOSC External Oscillator Frequency Range l 2.56 500 kHz tHEO External Oscillator High Period l 0.25 390 µs tLEO External Oscillator Low Period l 0.25 390 µs tCONV Conversion Time (LTC2415) FO = 0V l 65.43 66.77 68.1 ms FO = VCC l 78.52 80.12 81.72 ms External Oscillator (Note 11) l 10278/f ms EOSC (in kHz) Conversion Time (LTC2415-1) FO = 0V l 71.3 72.8 74.3 ms External Oscillator (Note 11) l 10278/f ms EOSC (in kHz) f ISCK Internal SCK Frequency Internal Oscillator (Note 10), LTC2415 19.2 kHz Internal Oscillator (Note 10), LTC2415-1 17.5 kHz External Oscillator (Notes 10, 11) fEOSC/8 kHz DISCK Internal SCK Duty Cycle (Note 10) l 45 55 % fESCK External SCK Frequency Range (Note 9) l 2000 kHz tLESCK External SCK Low Period (Note 9) l 250 ns tHESCK External SCK High Period (Note 9) l 250 ns tDOUT_ISCK Internal SCK 32-Bit Data Output Time Internal Oscillator (Notes 10, 12), LTC2415 l 1.64 1.67 1.70 ms Internal Oscillator (Notes 10, 12), LTC2415-1 l 1.80 1.83 1.86 ms External Oscillator (Notes 10, 11) l 256/f ms EOSC (in kHz) tDOUT_ESCK External SCK 32-Bit Data Output Time (Note 9) l 32/fESCK (in kHz) ms t1 CS ↓ to SDO Low Z l 0 200 ns t2 CS ↑ to SDO High Z l 0 200 ns t3 CS ↓ to SCK ↓ (Note 10) l 0 200 ns t4 CS ↓ to SCK ↑ (Note 9) l 50 ns tKQMAX SCK ↓ to SDO Valid l 220 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
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
FO = VCC (internal oscillator) or fEOSC = 128000Hz ±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:
The converter is in external SCK mode of operation such that the reliability and lifetime. SCK pin is used as digital input. The frequency of the clock signal driving
Note 2:
All voltage values are with respect to GND. SCK during the data output is fESCK and is expressed in kHz.
Note 3:
VCC = 2.7 to 5.5V unless otherwise specified.
Note 10:
The converter is in internal SCK mode of operation such that the VREF = REF+ – REF–, VREFCM = (REF+ + REF–)/2; SCK pin is used as digital output. In this mode of operation the SCK pin VIN = IN+ – IN–, VINCM = (IN+ + IN–)/2. has a total equivalent load capacitance CLOAD = 20pF.
Note 4:
FO pin tied to GND or to VCC or to external conversion clock source
Note 11:
The external oscillator is connected to the FO pin. The external with fEOSC = 153600Hz unless otherwise specified. oscillator frequency, fEOSC, 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 FO = 0V or FO = VCC. straight line passing through the actual endpoints of the transfer curve.
Note 13:
The output noise includes the contribution of the internal The deviation is measured from the center of the quantization band. calibration operations.
Note 7:
FO = 0V (internal oscillator) or fEOSC = 153600Hz ±2% (external
Note 14:
Refer to Offset Accuracy and Drift in the Applications Information oscillator). section. 2415fa For more information www.linear.com/LTC2415 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Converter Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3,4) Analog Input and Reference The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3,4) Electrical Characteristics Digital Inputs and Digital Outputs The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3) Power Requirements The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3) Analog Input and Reference The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3,4) Timing Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Notes 3,4) Typical Performance Characteristics Pin Functions Functional Block Diagram Test Circuits Applications Information Typical Applications PCB Layout and Film Package Description Revision History Typical Application Related Parts