Datasheet LTC2487 (Analog Devices) - 5

LTC2487
POWER REQUIREMENTS 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
VCC Supply Voltage l 2.7 5.5 V ICC Supply Current Conversion Current (Note 11) l 160 275 µA Temperature Measurement (Note 11) l 200 300 µA Sleep Mode (Note 11) l 1 2 µA
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 50 µs tLEO External Oscillator Low Period l 0.125 50 µs tCONV_1 Conversion Time for 1x Speed Mode 50Hz Mode l 157.2 160.3 163.5 ms 60Hz Mode l 131 133.6 136.3 ms Simultaneous 50Hz/60Hz Mode l 144.1 146.9 149.9 ms External Oscillator (Note 10) 41036/fEOSC (in kHz) ms tCONV_2 Conversion Time for 2x Speed Mode 50Hz Mode l 78.7 80.3 81.9 ms 60Hz Mode l 65.6 66.9 68.2 ms Simultaneous 50Hz/60Hz Mode l 72.2 73.6 75.1 ms External Oscillator (Note 10) 20556/fEOSC (in kHz) ms
I2 C 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(STA) 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 7:
50Hz mode (internal oscillator) or fEOSC = 256kHz ±2% (external oscillator). may cause permanent damage to the device. Exposure to any Absolute
Note 8:
60Hz mode (internal oscillator) or f Maximum Rating condition for extended periods may affect device EOSC = 307.2kHz ±2% (external oscillator). reliability and lifetime.
Note 9:
Simultaneous 50Hz/60Hz mode (internal oscillator) or fEOSC = 280kHz ±2% (external oscillator).
Note 2:
All voltage values are with respect to GND.
Note 10:
The external oscillator is connected to the f
Note 3:
Unless otherwise specified: V O pin. The external CC = 2.7V to 5.5V oscillator frequency, f V EOSC, is expressed in kHz. REFCM = VREF/2, FS = 0.5VREF/Gain
Note 11:
The converter uses its internal oscillator. VIN = IN+ – IN–, VIN(CM) = (IN+ – IN–)/2, where IN+ and IN– are the selected input channels.
Note 12:
The output noise includes the contribution of the internal calibration operations.
Note 4:
Use internal conversion clock or external conversion clock source with f
Note 13:
Guaranteed by design and test correlation. EOSC = 307.2kHz unless otherwise specified.
Note 5:
Guaranteed by design, not subject to test.
Note 14:
CB = capacitance of one bus line in pF (10pF ≤ CB ≤ 400pF).
Note 6:
Integral nonlinearity is defined as the deviation of a code from a
Note 15:
All values refer to VIH(MIN) and VIL(MAX) levels. straight line passing through the actual endpoints of the transfer curve.
Note 16:
Refer to Applications Information section for Performance vs The deviation is measured from the center of the quantization band. Data Rate graphs. 2487fg For more information www.linear.com/LTC2487 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics (Normal Speed) Electrical Characteristics (2x Speed) Converter Characteristics Analog Input and Reference I2C Inputs and Digital Outputs Power Requirements Digital Inputs and Digital Outputs I2C Timing Characteristics Typical Performance Characteristics Functional Block Diagram Applications Information Package Description Revision History Typical Application Related Parts