Datasheet

LTC2990
3
2990fc
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 3.3V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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
LSB
C
IN
V1 Through V4 Input Sampling
Capacitance
(Note 2) 0.35 pF
I
IN(AVG)
V1 Through V4 Input Average Sampling
Current
0V ≤ V
N
≤ 3V (Note 2) 0.6 μA
I
DC_LEAK(VIN)
V1 Through V4 Input Leakage Current 0V ≤ V
N
≤ V
CC
l
–10 10 nA
Measurement Delay
T
INT
, T
R1
, T
R2
Per Confi gured Temperature Measurement (Note 2)
l
37 46 55 ms
V1, V2, V3, V4 Single-Ended Voltage Measurement (Note 2) Per Voltage, Two Minimum
l
1.2 1.5 1.8 ms
V1 – V2, V3 – V4 Differential Voltage Measurement (Note 2)
l
1.2 1.5 1.8 ms
V
CC
V
CC
Measurement (Note 2)
l
1.2 1.5 1.8 ms
Max Delay Mode[4:0] = 11101, T
INT
, T
R1
, T
R2
, V
CC
(Note 2)
l
167 ms
V1, V3 Output (Remote Diode Mode Only)
I
OUT
Output Current Remote Diode Mode
l
260 350 μA
V
OUT
Output Voltage
l
0V
CC
V
I
2
C Interface
V
ADR(L)
ADR0, ADR1 Input Low Threshold Voltage Falling
l
0.3 • V
CC
V
V
ADR(H)
ADR0, ADR1 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 Input Current ADR0 or ADR1 Tied to V
CC
or GND
l
±1 μA
I
2
C Timing (Note 2)
f
SCL(MAX)
Maximum SCL Clock Frequency 400 kHz
t
LOW
Minimum SCL Low Period 1.3 μs
t
HIGH
Minimum SCL High Period 600 ns
t
BUF(MIN)
Minimum Bus Free Time Between Stop/
Start Condition
1.3 μs
t
HD,STA(MIN)
Minimum Hold Time After (Repeated)
Start Condition
600 ns
t
SU,STA(MIN)
Minimum Repeated Start Condition Set-Up
Time
600 ns
t
SU,STO(MIN)
Minimum Stop Condition Set-Up Time 600 ns
t
HD,DATI(MIN)
Minimum Data Hold Time Input 0ns
t
HD,DATO(MIN)
Minimum Data Hold Time Output 300 900 ns
t
SU,DAT(MIN)
Minimum Data Set-Up Time Input 100 ns
t
SP(MAX)
Maximum Suppressed Spike Pulse Width 50 250 ns
C
X
SCL, SDA Input Capacitance 10 pF
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Guaranteed by design and not subject to test.
Note 3: Integral nonlinearity is defi ned as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 4: Trimmed to an ideality factor of 1.004 at 25°C. Remote diode
temperature drift (TUE) verifi ed at diode voltages corresponding to
the temperature extremes with the LTC2990 at 25°C. Remote diode
temperature drift (TUE) guaranteed by characterization over the LTC2990
operating temperature range.