Datasheet

LTC2991
3
2991fd
For more information www.linear.com/LTC2991
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
CC
= 3.3V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DIFF(CMR)
Differential Voltage Common Mode Range
l
0 V
CC
V
V
LSB(DIFF)
Differential Voltage LSB Weight 19.075 µV
V
LSB(SINGLE_ENDED)
Single-Ended Voltage LSB Weight 305.18 µV
V
LSB(TEMP)
Temperature LSB Weight Celsius or Kelvin 0.0625 Deg
V
LSB(DIODE_VOLTAGE)
Diode Voltage LSB Weight Includes Series Resistance IR Drop 38.15 µV
T
NOISE
Temperature Noise Celsius or Kelvin Filter Disengaged 0.2 °RMS
T
NOISE
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 ≤ V
CC
≤ 5.5V, V
IN(CM)
= 1.5V
(Note 2)
Single-Ended
Differential
l
–2
–2
2
2
LSB
C
IN
V1 Through V8 Input Sampling Capacitance (Note 2) 0.35 pF
I
IN(AVG)
V1 Through V8 Input Average Sampling
Current
(0 ≤ V
N
≤ 4.9V) (Note 2) 0.6 µA
I
DC_LEAK(VIN)
V1 Through V8 Input Leakage Current (0 ≤ V
N
≤ V
CC
)
l
–10 10 nA
PWM
F
PWM
PWM Period
l
0.9 1.2 ms
DC
PWM
Duty Cycle Range
l
0 99.8 %
SCALE
PWM
0% to 100% PWM Temperature Range 32 Deg
Measurement Delay
T
INTERNAL
, T
R1
, T
R2
,
T
R3
, T
R4
Per Configured Temperature
Measurement
l
37 46 55 ms
V1, V2, V3, V4, V5,
V6, V7, V8
Single-Ended Voltage Measurement
l
0.9 1.5 1.8 ms
V1 – V2, V3 – V4,
V5 – V6, V7 – V8
Differential Voltage Measurement
l
0.9 1.5 1.8 ms
V
CC
V
CC
Measurement
l
0.9 1.5 1.8 ms
Max Delay Mode[4:0] = 11101, T
INTERNAL
, T
R1
, T
R2
, T
R3
,
T
R4
V
CC
l
277 ms
V1, V3, V5, V7 OUTPUT (Remote Diode Mode Only)
I
OUT
Output Current Remote Diode Mode
l
260 350 µA
V
OUT
Output Voltage
l
0 V
CC
V
I
2
C Interface
V
ADR(L)
ADR Input Low Threshold Voltage Falling
l
0.3•V
CC
V
V
ADR(H)
ADR Input High Threshold Voltage Rising
l
0.7•V
CC
V
V
OL1
SDA Low Level Maximum Voltage I
O
= –3mA, V
CC
2.9V to 5.5V
l
0.4 V
V
IL
Maximum Low Level Input Voltage SDA and SCL Pins
l
0.3•V
CC
V
V
IH
Minimum High Level Input Voltage SDA and SCL Pins
l
0.7•V
CC
V
I
SDAI, SCLI
SDA, SCL Input Current 0 < V
SDA, SCL
< V
CC
l
±1 µA
I
ADR(MAX)
Maximum ADR0, ADR1, ADR2 Input Current ADR0, ADR1 or ADR2 Tied to V
CC
or GND
l
±1 µA