Datasheet LTC2991 (Analog Devices) - 3

LTC2991
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VCC = 3.3V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VDIFF(CMR) Differential Voltage Common Mode Range l 0 VCC V VLSB(DIFF) Differential Voltage LSB Weight 19.075 µV VLSB(SINGLE_ENDED) Single-Ended Voltage LSB Weight 305.18 µV VLSB(TEMP) Temperature LSB Weight Celsius or Kelvin 0.0625 Deg VLSB(DIODE_VOLTAGE) Diode Voltage LSB Weight Includes Series Resistance IR Drop 38.15 µV TNOISE Temperature Noise Celsius or Kelvin Filter Disengaged 0.2 °RMS TNOISE Temperature Noise Celsius or Kelvin Filter Engaged 0.07 °RMS RES Resolution (No Missing Codes) (Note 2) l 14 Bits INL Integral Nonlinearity 2.9V ≤ VCC ≤ 5.5V, VIN(CM) = 1.5V (Note 2) Single-Ended l –2 2 LSB Differential l –2 2 LSB CIN V1 Through V8 Input Sampling Capacitance (Note 2) 0.35 pF IIN(AVG) V1 Through V8 Input Average Sampling (0 ≤ VN ≤ 4.9V) (Note 2) 0.6 µA Current IDC_LEAK(VIN) V1 Through V8 Input Leakage Current (0 ≤ VN ≤ VCC) l –10 10 nA
PWM
FPWM PWM Period l 0.9 1.2 ms DCPWM Duty Cycle Range l 0 99.8 % SCALEPWM 0% to 100% PWM Temperature Range 32 Deg
Measurement Delay
TINTERNAL, TR1, TR2, Per Configured Temperature l 37 46 55 ms TR3, TR4 Measurement V1, V2, V3, V4, V5, Single-Ended Voltage Measurement l 0.9 1.5 1.8 ms V6, V7, V8 V1 – V2, V3 – V4, Differential Voltage Measurement l 0.9 1.5 1.8 ms V5 – V6, V7 – V8 VCC VCC Measurement l 0.9 1.5 1.8 ms Max Delay Mode[4:0] = 11101, TINTERNAL, TR1, TR2, TR3, l 277 ms TR4 VCC
V1, V3, V5, V7 OUTPUT (Remote Diode Mode Only)
IOUT Output Current Remote Diode Mode l 260 350 µA VOUT Output Voltage l 0 VCC V
I2C Interface
VADR(L) ADR Input Low Threshold Voltage Falling l 0.3•VCC V VADR(H) ADR Input High Threshold Voltage Rising l 0.7•VCC V VOL1 SDA Low Level Maximum Voltage IO = –3mA, VCC 2.9V to 5.5V l 0.4 V VIL Maximum Low Level Input Voltage SDA and SCL Pins l 0.3•VCC V VIH Minimum High Level Input Voltage SDA and SCL Pins l 0.7•VCC V ISDAI, SCLI SDA, SCL Input Current 0 < VSDA, SCL < VCC l ±1 µA IADR(MAX) Maximum ADR0, ADR1, ADR2 Input Current ADR0, ADR1 or ADR2 Tied to VCC l ±1 µA or GND 2991ff For more information www.linear.com/LTC2991 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts