Datasheet LTC2497 (Analog Devices) - 5

LTC2497
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. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fEOSC External Oscillator Frequency Range (Note 16) l 10 1000 kHz tHEO External Oscillator High Period l 0.125 100 µs tLEO External Oscillator Low Period l 0.125 100 µs tCONV Conversion Time Internal Oscillator l 144.1 146.9 149.9 ms External Oscillator (Note 10) 41036/fEOSC (in kHz) ms
i2c TiMing characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 3, 15) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fSCL SCL Clock Frequency l 0 400 kHz tHD(SDA) Hold Time (Repeated) Start Condition l 0.6 µs tLOW Low Period of the SCL Pin l 1.3 µs tHIGH High Period of the SCL Pin l 0.6 µs tSU(STA) Set-Up Time for a Repeated Start Condition l 0.6 µs tHD(DAT) Data Hold Time l 0 0.9 µs tSU(DAT) Data Set-Up Time l 100 ns tr Rise Time for SDA Signals (Note 14) l 20 + 0.1CB 300 ns tf Fall Time for SDA Signals (Note 14) l 20 + 0.1CB 300 ns tSU(STO) Set-Up Time for Stop Condition l 0.6 µs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 8:
fEOSC = 307.2kHz ±2% (external oscillator). may cause permanent damage to the device. Exposure to any Absolute
Note 9:
Simultaneous 50Hz/60Hz (internal oscillator) or fEOSC = 280kHz Maximum Rating condition for extended periods may affect device ±2% (external oscillator). reliability and lifetime.
Note 10:
The external oscillator is connected to the fO pin. The external
Note 2:
All voltage values are with respect to GND. oscillator frequency, fEOSC, is expressed in kHz.
Note 3:
VCC = 2.7V to 5.5V unless otherwise specified.
Note 11:
The converter uses its internal oscillator. VREFCM = VREF/2, FS = 0.5VREF
Note 12:
The output noise includes the contribution of the internal VIN = IN+ – IN–, VIN(CM) = (IN+ – IN–)/2, calibration operations. where IN+ and IN– are the selected input channels.
Note 13:
Guaranteed by design and test correlation.
Note 4:
Use internal conversion clock or external conversion clock source
Note 14:
CB = capacitance of one bus line in pF (10pF ≤ CB ≤ 400pF). with fEOSC = 307.2kHz unless otherwise specified.
Note 15:
All values refer to VIH(MIN) and VIL(MAX) levels.
Note 5:
Guaranteed by design, not subject to test.
Note 16:
Refer to Applications Information section for performance versus
Note 6:
Integral nonlinearity is defined as the deviation of a code from a data rate graphs. straight line passing through the actual endpoints of the transfer curve. The deviation is measured from the center of the quantization band.
Note 7:
fEOSC = 256kHz ±2% (external oscillator). 2497fb For more information www.linear.com/LTC2497 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Converter Characteristics Analog Input and Reference I2C Inputs And Digital Outputs Power Requirements Digital Inputs And Digital Outputs I2C Timing Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Package Description Revision History Typical Application Related Parts