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LTC2946HDE#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42
LTC2946
1
2946fa
For more information www.linear.com/LTC2946
TYPICAL APPLICATION
FEATURES DESCRIPTION
Wide Range I
2
C Power,
Charge and Energy Monitor
The LT C
®
2946 is a rail-to-rail system monitor that measures
current, voltage, power, charge and energy. It features an
operating range of 2.7V to 100V and includes a shunt regu
-
lator for supplies above 100V. The current measurement
common mode range of 0V to 100V is independent of the
input supply. A 12-bit ADC measures load current, input
voltage and an auxiliary external voltage. Load current and
internally calculated power are integrated over an external
clock or crystal or internal oscillator time base for charge
and energy. An accurate time base allows the LTC2946
to provide measurement accuracy of better than ±0.6%
for charge and ±1% for power and energy. Minimum and
maximum values are stored and an overrange alert with
programmable thresholds minimizes the need for software
polling. Data is reported via a standard I
2
C interface.
The LTC2946 I
2
C interface includes separate data input
and output pins for use with standard or opto-isolated I
2
C
connections. The LTC2946-1 has an inverted data output
for use with inverting opto-isolator configurations.
Wide Range Power, Charge and Energy
Monitor with Onboard ADC and I
2
C
ADC Total Unadjusted Error (ADIN)
APPLICATIONS
n
Rail-to-Rail Input Range: 0V to 100V
n
Wide Input Supply Range: 2.7V to 100V
n
Shunt Regulator for Supplies >100V
n
Δ∑ ADC with Less Than ±0.4% Total
Unadjusted Error
n
12-Bit Resolution for Current and Voltages
n
±1% Accurate Power and Energy Measurements
n
±0.6% Accurate Current and Charge Measurements
n
Additional ADC Input Monitors an External Voltage
n
Internal ±5% or External Time Bases
n
Continuous Scan and Snapshot Modes
n
Stores Minimum and Maximum Values
n
Alerts When Limits Exceeded
n
Split SDA Pin Eases Opto-Isolation
n
Shutdown Mode with I
Q
< 40µA
n
Available in 4mm × 3mm DFN and 16-Lead
MSOP Packages
n
Telecom Infrastructure
n
Industrial Equipment
n
General Purpose Energy Measurement
L, LT , LT C , LT M , Linear Technology and the Linear logo are registered trademarks and
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
I
2
C
INTERFACE
NINE I
2
C
ADDRESSES
ACCUMULATION
ENABLE
OPTIONAL
CRYSTAL
TIMEBASE
SENSE
+
SENSE
–
GPIO3 ALERT
SCL
SDAI
SDAO
ADIN
CLKOUT
GPIO1
V
DD
INTV
CC
ADR1
ADR0
GND
GPIO2
CLKIN
LTC2946
MEASURED
VOLTAGE
GENERAL
PURPOSE
OUTPUT
TO
LOAD
0.1µF
0.02Ω
V
IN
4V TO 100V
2946 TA01a
CODE
0
–0.10
ADC TUE (%)
–0.05
0
0.05
0.10
1024 2048 3072 4096
2946 TA01b
LTC2946
2
2946fa
For more information www.linear.com/LTC2946
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
V
DD
Voltage .............................................. –0.3V to 100V
SENSE
+
Voltage ...........................................–1V to 100V
SENSE
–
Voltage .....–1V or SENSE
+
– 1V to SENSE
+
+ 1V
INTV
CC
Voltage
(Note 3) ................... –0.3V to Lesser of 5.8V, V
DD
+ 0.3V
ADR1, ADR0, ADIN, SDAO, SDAO, GPIO1 TO GPIO3
Voltages ....................................................... –0.3V to 7V
CLKOUT Voltage ........................–0.3V to INTV
CC
+ 0.3V
CLKIN Voltage ........................................... –0.3V to 5.5V
INTV
CC
Clamp Current ...........................................35mA
(Notes 1, 2)
LTC2946
16
15
14
13
12
11
10
9
17
GND
1
2
3
4
5
6
7
8
SENSE
+
SENSE
–
ADR1
ADIN
ADR0
GND
CLKOUT
CLKIN
V
DD
INTV
CC
GPIO1
GPIO2
GPIO3
SDAO
SDAI
SCL
TOP VIEW
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 43°C/W, E PAD GND SOLDERED DOWN
EXPOSED PAD (PIN 17) IS GND, PCB GND CONNECTION IS OP
TIONAL
1
2
3
4
5
6
7
8
V
DD
INTV
CC
GPIO1
GPIO2
GPIO3
SDAO
SDAI
SCL
16
15
14
13
12
11
10
9
SENSE
+
SENSE
–
ADR1
ADIN
ADR0
GND
CLKOUT
CLKIN
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 120°C/W
LTC2946-1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
SENSE
+
SENSE
–
ADR1
ADIN
ADR0
GND
CLKOUT
CLKIN
V
DD
INTV
CC
GPIO1
GPIO2
GPIO3
SDAO
SDAI
SCL
TOP VIEW
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
17
GND
T
JMAX
= 125°C, θ
JA
= 43°C/W, E PAD GND SOLDERED DOWN
EXPOSED PAD (PIN 17) IS GND, PCB GND CONNECTION IS OP
TIONAL
1
2
3
4
5
6
7
8
V
DD
INTV
CC
GPIO1
GPIO2
GPIO3
SDAO
SDAI
SCL
16
15
14
13
12
11
10
9
SENSE
+
SENSE
–
ADR1
ADIN
ADR0
GND
CLKOUT
CLKIN
TOP VIEW
MS PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 120°C/W
SCL, SDAI Voltages (Note 4) ..................... –0.3V to 5.9V
SCL, SDAI Clamp Current ........................................5mA
Operating Temperature Range
LTC2946C ................................................ 0°C to 70°C
LTC2946I .............................................–40°C to 85°C
LTC2946H .......................................... –40°C to 125°C
LTC2946MP ...................................... –55°C TO 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Package Only ..............................................300°C
LTC2946
3
2946fa
For more information www.linear.com/LTC2946
ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Supplies
V
DD
V
DD
Input Supply Voltage
l
4 100 V
V
CC
INTV
CC
Input Supply Voltage
l
2.7 5.8 V
I
DD
V
DD
Supply Current V
DD
= 48V, INTV
CC
Open
Shutdown
l
l
0.9
15
1.3
40
mA
μA
I
CC
INTV
CC
Supply Current INTV
CC
= V
DD
= 5V
Shutdown
l
l
0.7
15
1.0
40
mA
μA
V
CC(LDO)
INTV
CC
Linear Regulator Voltage 8V < V
DD
< 100V, I
LOAD
= 0mA
l
4.4 5 5.4 V
ΔV
CC(LDO)
INTV
CC
Linear Regulator Load Regulation 8V < V
DD
< 100V, I
LOAD
= 0mA to 10mA
l
100 200 mV
V
CCZ
Shunt Regulator Voltage at INTV
CC
V
DD
= 48V, I
CC
= 1mA
l
5.8 6.3 6.7 V
ΔV
CCZ
Shunt Regulator Load Regulation V
DD
= 48V, I
CC
= 1mA to 35mA
l
250 mV
V
CC(UVL)
INTV
CC
Supply Undervoltage Lockout INTV
CC
Rising, V
DD
= INTV
CC
l
2.3 2.6 2.69 V
V
DD(UVL)
V
DD
Supply Undervoltage Lockout V
DD
Rising, INTV
CC
Open
l
2.4 2.8 3 V
V
DDI2C(RST)
V
DD
I
2
C Logic Reset V
DD
Falling, INTV
CC
Open
l
1.7 2.1 V
V
CCI2C(RST)
INTV
CC
I
2
C Logic Reset INTV
CC
Falling, V
DD
= INTV
CC
l
1.7 2.1 V
SENSE Inputs
I
SENSE
+
(HI)
48V SENSE
+
Input Current SENSE
+
, SENSE
–
, V
DD
= 48V
Shutdown
l
l
100 150
1
µA
µA
I
SENSE
–
(HI)
48V SENSE
–
Input Current SENSE
+
, SENSE
–
, V
DD
= 48V
Shutdown
l
l
20
1
µA
µA
I
SENSE
+
(LO)
0V SENSE
+
Source Current SENSE
+
, SENSE
–
= 0V, V
DD
= 48V
Shutdown
l
l
–10
–1
µA
µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
is from 4V to 100V, unless otherwise noted. (Note 2)
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2946CDE#PBF LTC2946CDE#TRPBF 2946 16-Lead (4mm × 3mm) Plastic DFN 0°C to 70°C
LTC2946IDE#PBF LTC2946IDE#TRPBF 2946 16-Lead (4mm × 3mm) Plastic DFN –40°C to 85°C
LTC2946HDE#PBF LTC2946HDE#TRPBF 2946 16-Lead (4mm × 3mm) Plastic DFN –40°C to 125°C
LTC2946CDE-1#PBF LTC2946CDE-1#TRPBF 29461 16-Lead (4mm × 3mm) Plastic DFN 0°C to 70°C
LTC2946IDE-1#PBF LTC2946IDE-1#TRPBF 29461 16-Lead (4mm × 3mm) Plastic DFN –40°C to 85°C
LTC2946HDE-1#PBF LTC2946HDE-1#TRPBF 29461 16-Lead (4mm × 3mm) Plastic DFN –40°C to 125°C
LTC2946CMS#PBF LTC2946CMS#TRPBF 2946 16-Lead Plastic MSOP 0°C to 70°C
LTC2946IMS#PBF LTC2946IMS#TRPBF 2946 16-Lead Plastic MSOP –40°C to 85°C
LTC2946HMS#PBF LTC2946HMS#TRPBF 2946 16-Lead Plastic MSOP –40°C to 125°C
LTC2946MPMS#PBF LTC2946MPMS#TRPBF 2946 16-Lead Plastic MSOP –55°C to 125°C
LTC2946CMS-1#PBF LTC2946CMS-1#TRPBF 29461 16-Lead Plastic MSOP 0°C to 70°C
LTC2946IMS-1#PBF LTC2946IMS-1#TRPBF 29461 16-Lead Plastic MSOP –40°C to 85°C
LTC2946HMS-1#PBF LTC2946HMS-1#TRPBF 29461 16-Lead Plastic MSOP –40°C to 125°C
LTC2946MPMS-1#PBF LTC2946MPMS-1#TRPBF 29461 16-Lead Plastic MSOP –55°C to 125°C
Consult LT C Marketing for parts specified with wider operating temperature ranges.
Consult LT C
Marketing for information on nonstandard lead based finish parts.
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/
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42

LTC2946HDE#TRPBF

Mfr. #:
Buy LTC2946HDE#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Current Sense Amplifiers Wide Rng I2C Pwr, Ch & Energy Mon
Lifecycle:
New from this manufacturer.
Delivery:
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