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LTC2946 PDF даташит

Спецификация LTC2946 изготовлена ​​​​«Linear Technology» и имеет функцию, называемую «Charge and Energy Monitor».

Детали детали

Номер произв LTC2946
Описание Charge and Energy Monitor
Производители Linear Technology
логотип Linear Technology логотип 

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LTC2946 Даташит, Описание, Даташиты
LTC2946
Wide Range I2C Power,
Charge and Energy Monitor
FEATURES
DESCRIPTION
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 IQ < 40µA
n Available in 4mm × 3mm DFN and 16-Lead
MSOP Packages
APPLICATIONS
n Telecom Infrastructure
n Industrial Equipment
n General Purpose Energy Measurement
The LTC®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 I2C interface.
The LTC2946 I2C interface includes separate data input
and output pins for use with standard or opto-isolated I2C
connections. The LTC2946-1 has an inverted data output
for use with inverting opto-isolator configurations.
L, LT, LTC, LTM, 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.
TYPICAL APPLICATION
Wide Range Power, Charge and Energy
Monitor with Onboard ADC and I2C
VIN
4V TO 100V
0.1µF
NINE I2C
ADDRESSES
ACCUMULATION
ENABLE
0.02Ω
TO
LOAD
SENSE+ SENSE
VDD GPIO3
INTVCC
SCL
ADR1 LTC2946 SDAI
ADR0
SDAO
GND ADIN
ALERT
I2C
INTERFACE
MEASURED
VOLTAGE
GPIO2
CLKIN
GPIO1
CLKOUT
GENERAL
PURPOSE
OUTPUT
OPTIONAL
CRYSTAL
TIMEBASE
2946 TA01a
ADC Total Unadjusted Error (ADIN)
0.10
0.05
0
–0.05
–0.10
0
1024
2048
CODE
3072
4096
2946 TA01b
For more information www.linear.com/LTC2946
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LTC2946 Даташит, Описание, Даташиты
LTC2946
ABSOLUTE MAXIMUM RATINGS (Notes 1, 2)
SVEDND SVEo+ltVagoelt..a..g..e..................................................................................–...0–.31VV
to
to
100V
100V
SENSEVoltage......–1V or SENSE+ – 1V to SENSE+ + 1V
INTVCC Voltage
(Note 3)....................–0.3V to Lesser of 5.8V, VDD + 0.3V
ADR1, ADR0, ADIN, SDAO, SDAO, GPIO1 TO GPIO3
Voltages........................................................ –0.3V to 7V
CLKOUT Voltage.........................–0.3V to INTVCC + 0.3V
CLKIN Voltage............................................ –0.3V to 5.5V
INTVCC Clamp Current............................................35mA
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
PIN CONFIGURATION
LTC2946
VDD
INTVCC
GPIO1
GPIO2
GPIO3
SDAO
SDAI
SCL
1
2
3
4
5
6
7
8
TOP VIEW
17
GND
16 SENSE+
15 SENSE
14 ADR1
13 ADIN
12 ADR0
11 GND
10 CLKOUT
9 CLKIN
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, E PAD GND SOLDERED DOWN
EXPOSED PAD (PIN 17) IS GND, PCB GND CONNECTION IS OPTIONAL
LTC2946-1
VDD
INTVCC
GPIO1
GPIO2
GPIO3
SDAO
SDAI
SCL
1
2
3
4
5
6
7
8
TOP VIEW
17
GND
16 SENSE+
15 SENSE
14 ADR1
13 ADIN
12 ADR0
11 GND
10 CLKOUT
9 CLKIN
DE PACKAGE
16-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, E PAD GND SOLDERED DOWN
EXPOSED PAD (PIN 17) IS GND, PCB GND CONNECTION IS OPTIONAL
INGTPVVIODCD1C
1
2
3
GPIO2 4
GPIO3 5
SDAO 6
SDAI 7
SCL 8
TOP VIEW
16
15
SSEENNSSEE+–
14 ADR1
13 ADIN
12 ADR0
11 GND
10 CLKOUT
9 CLKIN
MS PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 120°C/W
INGTPVVIODCD1C
1
2
3
GPIO2 4
GPIO3 5
SDAO 6
SDAI 7
SCL 8
TOP VIEW
16
15
SSEENNSSEE+–
14 ADR1
13 ADIN
12 ADR0
11 GND
10 CLKOUT
9 CLKIN
MS PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 120°C/W
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LTC2946 Даташит, Описание, Даташиты
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC2946CDE#PBF
LTC2946CDE#TRPBF
2946
16-Lead (4mm × 3mm) Plastic DFN
LTC2946IDE#PBF
LTC2946IDE#TRPBF
2946
16-Lead (4mm × 3mm) Plastic DFN
LTC2946HDE#PBF
LTC2946HDE#TRPBF
2946
16-Lead (4mm × 3mm) Plastic DFN
LTC2946CDE-1#PBF
LTC2946CDE-1#TRPBF 29461
16-Lead (4mm × 3mm) Plastic DFN
LTC2946IDE-1#PBF
LTC2946IDE-1#TRPBF 29461
16-Lead (4mm × 3mm) Plastic DFN
LTC2946HDE-1#PBF
LTC2946HDE-1#TRPBF 29461
16-Lead (4mm × 3mm) Plastic DFN
LTC2946CMS#PBF
LTC2946CMS#TRPBF 2946
16-Lead Plastic MSOP
LTC2946IMS#PBF
LTC2946IMS#TRPBF
2946
16-Lead Plastic MSOP
LTC2946HMS#PBF
LTC2946HMS#TRPBF 2946
16-Lead Plastic MSOP
LTC2946MPMS#PBF
LTC2946MPMS#TRPBF 2946
16-Lead Plastic MSOP
LTC2946CMS-1#PBF
LTC2946CMS-1#TRPBF 29461
16-Lead Plastic MSOP
LTC2946IMS-1#PBF
LTC2946IMS-1#TRPBF 29461
16-Lead Plastic MSOP
LTC2946HMS-1#PBF
LTC2946HMS-1#TRPBF 29461
16-Lead Plastic MSOP
LTC2946MPMS-1#PBF LTC2946MPMS-1#TRPBF 29461
16-Lead Plastic MSOP
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC 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/
LTC2946
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
0°C to 70°C
–40°C to 85°C
–40°C to 125°C
–55°C to 125°C
E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDD is from 4V to 100V, unless otherwise noted. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Supplies
VDD VDD Input Supply Voltage
VCC INTVCC Input Supply Voltage
IDD VDD Supply Current
VDD = 48V, INTVCC Open
Shutdown
l4
100
l 2.7
5.8
l 0.9 1.3
l 15 40
ICC INTVCC Supply Current
INTVCC = VDD = 5V
Shutdown
l 0.7 1.0
l 15 40
VCC(LDO)
ΔVCC(LDO)
VCCZ
ΔVCCZ
VCC(UVL)
VDD(UVL)
VDDI2C(RST)
VCCI2C(RST)
SENSE Inputs
INTVCC Linear Regulator Voltage
INTVCC Linear Regulator Load Regulation
Shunt Regulator Voltage at INTVCC
Shunt Regulator Load Regulation
INTVCC Supply Undervoltage Lockout
VDD Supply Undervoltage Lockout
VDD I2C Logic Reset
INTVCC I2C Logic Reset
8V < VDD < 100V, ILOAD = 0mA
8V < VDD < 100V, ILOAD = 0mA to 10mA
VDD = 48V, ICC = 1mA
VDD = 48V, ICC = 1mA to 35mA
INTVCC Rising, VDD = INTVCC
VDD Rising, INTVCC Open
VDD Falling, INTVCC Open
INTVCC Falling, VDD = INTVCC
l
l
l
l
l
l
l
l
4.4
5.8
2.3
2.4
1.7
1.7
5 5.4
100 200
6.3 6.7
250
2.6 2.69
2.8 3
2.1
2.1
ISENSE+(HI)
ISENSE(HI)
ISENSE+(LO)
48V SENSE+ Input Current
48V SENSEInput Current
0V SENSE+ Source Current
SENSE+, SENSE
Shutdown
,
VDD
=
48V
SENSE+, SENSE, VDD = 48V
Shutdown
SENSE+, SENSE= 0V, VDD = 48V
Shutdown
l
l
l
l
l
l
100 150
1
20
1
–10
–1
UNITS
V
V
mA
μA
mA
μA
V
mV
V
mV
V
V
V
V
µA
µA
µA
µA
µA
µA
For more information www.linear.com/LTC2946
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