the device can be configured to measure many combi-
nations of internal temperature, remote temperature,
remote voltage, remote current and internal V
CC
. The
internal 10ppm/°C reference minimizes the number of
supporting components and area required. Selectable
address and configurable functionality give the LTC2990
flexibility to be incorporated in various systems needing
temperature, voltage or current data. The LTC2990 fits
well in systems needing sub-millivolt voltage resolution,
1% current measurement and 1°C temperature accuracy
or any combination of the three.
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Easy
Drive is a trademark of Linear Technology Corporation. All other trademarks are the property of
their respective owners.
Measures Voltage, Current and Temperature
Measures Two Remote Diode Temperatures
±0.5°C Accuracy, 0.06°C Resolution (Typ)
±1°C Internal Temperature Sensor (Typ)
14-Bit ADC Measures Voltage/Current
3V to 5.5V Supply Operating Voltage
Four Selectable Addresses
Internal 10ppm/°C Voltage Reference
10-Lead MSOP Package
applicaTions
n
n
n
n
n
Temperature Measurement
Supply Voltage Monitoring
Current Measurement
Remote Data Acquisition
Environmental Monitoring
Typical applicaTion
Voltage, Current, Temperature Monitor
2.5V
5V
V
CC
SDA
SCL
ADR0
ADR1
V1
V2
TUE (°C)
V3
LTC2990
V4
GND
T
INTERNAL
MEASURES: TWO SUPPLY VOLTAGES,
SUPPLY CURRENT, INTERNAL AND
REMOTE TEMPERATURES
–1.0
–50 –25
0
50
25
T
AMB
(°C)
75
100
125
2990 TA01a
Temperature Total Unadjusted Error
1.0
I
LOAD
0.5
T
REMOTE
R
SENSE
T
REMOTE
0
–0.5
2990 TA01b
2990fe
For more information
www.linear.com/LTC2990
1
LTC2990
absoluTe MaxiMuM raTings
Supply Voltage V
CC
................................... –0.3V to 6.0V
Input Voltages V1, V2, V3, V4, SDA, SCL,
ADR1, ADR2..................................–0.3V to (V
CC
+ 0.3V)
Operating Temperature Range
LTC2990C ................................................ 0°C to 70°C
LTC2990I .............................................–40°C to 85°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
(Note 1)
pin conFiguraTion
TOP VIEW
V1
V2
V3
V4
GND
1
2
3
4
5
10
9
8
7
6
V
CC
ADR1
ADR0
SCL
SDA
MS PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 150°C/W
orDer inForMaTion
LEAD FREE FINISH
LTC2990CMS#PBF
LTC2990IMS#PBF
LEAD BASED FINISH
LTC2990CMS
LTC2990IMS
TAPE AND REEL
LTC2990CMS#TRPBF
LTC2990IMS#TRPBF
TAPE AND REEL
LTC2990CMS#TR
LTC2990IMS#TR
http://www.linear.com/product/LTC2990#orderinfo
PART MARKING*
LTDSQ
LTDSQ
PART MARKING*
LTDSQ
LTDSQ
PACKAGE DESCRIPTION
10-Lead Plastic MSOP
10-Lead Plastic MSOP
PACKAGE DESCRIPTION
10-Lead Plastic MSOP
10-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Contact LTC Marketing for parts trimmed to ideality factors other than 1.004.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
elecTrical characTerisTics
SYMBOL
General
V
CC
I
CC
I
SD
V
CC(UVL)
T
INT(TUE)
T
RMT(TUE)
V
CC(TUE)
V
n(TUE)
V
DIFF(TUE)
V
DIFF(MAX)
Input Supply Range
Input Supply Current
Input Supply Current
Input Supply Undervoltage Lockout
Internal Temperature Total Unadjusted
Error
Remote Diode Temperature Total
Unadjusted Error
V
CC
Voltage Total Unadjusted Error
V1 Through V4 Total Unadjusted Error
PARAMETER
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.
CONDITIONS
l
MIN
2.9
TYP
MAX
5.5
UNITS
V
mA
µA
V
°C
°C
°C
°C
%
%
%
mV
2990fe
During Conversion, I
2
C Inactive
Shutdown Mode, I
2
C Inactive
l
l
l
1.1
1
1.3
2.1
±0.5
±1
±3
1.8
5
2.7
±3.5
Measurement Accuracy
T
AMB
= 0°C to 85°C
T
AMB
= –40°C to 0°C
η
= 1.004 (Note 4)
l
l
l
l
l
±0.5
±0.1
±0.1
±0.2
–300
±1.5
±0.25
±0.25
±0.75
300
Differential Voltage Total Unadjusted Error –300mV ≤ V
D
≤ 300mV
V1 – V2 or V3 – V4
Maximum Differential Voltage
2
For more information
www.linear.com/LTC2990
LTC2990
elecTrical characTerisTics
SYMBOL
V
OFFSET_DIFF
V
OFFSET_SE
V
DIFF(CMR)
V
LSB(DIFF)
V
LSB(TEMP)
T
NOISE
Res
INL
PARAMETER
Differential Offset
Single-Ended Offset
Differential Voltage Common Mode Range
Differential Voltage LSB Weight
Temperature LSB Weight
Temperature Noise
Resolution (No Missing Codes)
Integral Nonlinearity
Celsius or Kelvin
Celsius or Kelvin
T
MEAS
= 46ms (Note 2)
(Note 2)
2.9V ≤ V
CC
≤ 5.5V, V
IN(CM)
= 1.5V
(Note 2)
Single-Ended
Differential
(Note 2)
0V ≤ V
N
≤ 3V (Note 2)
0V ≤ V
N
≤ V
CC
l
l
l
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.
CONDITIONS
V1 = V2 = V
CC
, V3 = V4 = 0V
V1, V2, V3, V4 = 0V
l
MIN
–12.5
–6
0
TYP
0
0
19.42
305.18
0.0625
0.2
0.05
MAX
12.5
6
V
CC
UNITS
LSB
LSB
V
µV
µV
Deg
°RMS
°/√Hz
Bits
V
LSB(SINGLE-ENDED)
Single-Ended Voltage LSB Weight
14
–2
–2
0.35
0.6
–10
37
1.2
1.2
1.2
46
1.5
1.5
1.5
2
2
LSB
LSB
pF
µA
C
IN
I
IN(AVG)
I
DC_LEAK(VIN)
Measurement Delay
T
INT
, T
R1
, T
R2
V1, V2, V3, V4
V1 – V2, V3 – V4
V
CC
Max Delay
I
OUT
V
OUT
I
2
C Interface
V
ADR(L)
V
ADR(H)
V
OL1
V
IL
V
IH
I
SDAI,SCLI
I
ADR(MAX)
I
2
C Timing (Note 2)
f
SCL(MAX)
t
LOW
t
HIGH
t
BUF(MIN)
t
HD,STA(MIN)
V1 Through V4 Input Sampling
Capacitance
V1 Through V4 Input Average Sampling
Current
V1 Through V4 Input Leakage Current
10
55
1.8
1.8
1.8
167
260
350
V
CC
0.3
•
V
CC
nA
ms
ms
ms
ms
ms
µA
V
V
V
V
V
V
µA
µA
kHz
Per Configured Temperature Measurement (Note 2)
Single-Ended Voltage Measurement
Differential Voltage Measurement
V
CC
Measurement
Mode[4:0] = 11101, T
INT
, T
R1
, T
R2
, V
CC
Output Current
Output Voltage
ADR0, ADR1 Input Low Threshold Voltage Falling
ADR0, ADR1 Input High Threshold Voltage Rising
SDA Low Level Maximum Voltage
Maximum Low Level Input Voltage
Minimum High Level Input Voltage
SDA, SCL Input Current
Maximum ADR0, ADR1 Input Current
Maximum SCL Clock Frequency
Minimum SCL Low Period
Minimum SCL High Period
Minimum Bus Free Time Between Stop/
Start Condition
Minimum Hold Time After (Repeated)
Start Condition
I
O
= –3mA, V
CC
= 2.9V to 5.5V
SDA and SCL Pins
SDA and SCL Pins
0 < V
SDA
,
SCL
< V
CC
ADR0 or ADR1 Tied to V
CC
or GND
(Note 2)
(Note 2)
(Note 2)
Remote Diode Mode
l
(Note 2) Per Voltage, Two Minimum
l
l
l
l
V1, V3 Output (Remote Diode Mode Only)
l
l
0
l
l
l
l
l
l
l
0.7
•
V
CC
0.4
0.3
•
V
CC
0.7
•
V
CC
±1
±1
400
1.3
600
1.3
600
µs
ns
µs
ns
2990fe
For more information
www.linear.com/LTC2990
3
LTC2990
elecTrical characTerisTics
SYMBOL
t
SU,STA(MIN)
t
SU,STO(MIN)
t
HD,DATI(MIN)
t
HD,DATO(MIN)
t
SU,DAT(MIN)
t
SP(MAX)
C
X
PARAMETER
Minimum Repeated Start Condition Set-Up
Time
Minimum Stop Condition Set-Up Time
Minimum Data Hold Time Input
Minimum Data Hold Time Output
Minimum Data Set-Up Time Input
Maximum Suppressed Spike Pulse Width
SCL, SDA Input Capacitance
50
300
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.
CONDITIONS
MIN
TYP
MAX
600
600
0
900
100
250
10
UNITS
ns
ns
ns
ns
ns
ns
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 defined 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) verified 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
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