LTC4151
2
High Voltage I C Current
and Voltage Monitor
Fea T Descrip T
n
Wide Operating Voltage Range: 7V to 80V
The LTC 4151 is a high side power monitor that operates
n
12-Bit Resolution for Both Current and Voltages
over a wide voltage range of 7V to 80V. In default operation
2
n
I C Interface
mode, the onboard 12-bit ADC continuously measures
n
Additional ADC Input Monitors an External Voltage
high side current, input voltage and an external voltage.
2
n
Continuous Scan and Snapshot Modes
Data is reported through the I C interface when polled
n
Shutdown Mode (LTC4151) Reduces Quiescent
by a host. The LTC4151 can also perform on-demand
Current to 120A
measurement in a snapshot mode. The LTC4151 features
n
Split SDA for Opto-Isolation (LTC4151-1/LTC4151-2)
a dedicated shutdown pin to reduce power consumption.
2
n
Available in 10-Lead MSOP, 10-Lead 3mm 3mm
The LTC4151-1/LTC4151-2 feature split I C data pins to
DFN and 16-Lead SO Packages
drive opto-isolators. The data out on the LTC4151-1 is
inverted while that on the LTC4151-2 is not.
a T
PART PACKAGE FEATURED PIN
n
LTC4151 DD10, MS10 SHDN
48V Telecom Infrastructure
n
Automotive LTC4151-1 DD10, MS10 SDAO
n
Industrial LTC4151-2 S16 SDAO
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Consumer
Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Typical a T 12-Bit ADC DNL and INL
1.0
0.5
2
High Side Power Sensing with Onboard ADC and I C
0
3.3V
0.02
V
IN 0.5
V
OUT
7V TO 80V
V
DD
2k 2k
+
SENSE SENSE
1.0
CONTROLLER
V SHDN
IN 0 1024 2048 3072 4096
LTC4151
CODE
SCL
SCL 4151 TA01b
ADR1 SDA
SDA
1.0
GND
MEASURED 4151 TA01
ADR0 ADIN
VOLTAGE
GND
0.5
0
0.5
1.0
0 2048 3072 4096
1024
CODE 4151 TA01c
4151ff
For more information www.linear.com/LTC4151 1
ADC INL (LSB) ADC DNL (LSB)
ion pplica
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ion uresLTC4151
a T e Maxi Mu M r a T (Notes 1, 3)
V Voltage ................................................. 0.3V to 90V Operating Temperature Range
IN
+
SENSE , SENSE Voltages ...........................V 10V or LTC4151C/LTC4151C-1/LTC4151C-2 ......... 0C to 70C
IN
0.3V to V + 0.3V LTC4151I/LTC4151I-1/LTC4151I-2 .........40C to 85C
IN
ADR1, ADR0 Voltages .............................. 0.3V to 90V LTC4151H ........................................... 40C to 125C
ADIN, SHDN, SDAO, SDAO Voltages ........... 0.3V to 6V Storage Temperature Range
SCL, SDA, SDAI Voltages (Note 2) ........... 0.3V to 5.5V MSOP, SO ..........................................65C to 150C
SCL, SDA, SDAI Clamp Current ............................... 5mA DFN .................................................... 65C to 125C
Lead Temperature (Soldering, 10 sec)
MSOP, SO .........................................................300C
p c F T
LTC4151 LTC4151
TOP VIEW
+
TOP VIEW
SENSE 1 10 SENSE
+
SENSE 1 10 SENSE
V 9 GND
2
IN
V 2 9 GND
IN
11
ADR1 3 SHDN
8
ADR1 3 8 SHDN
4 ADR0 4 7 SDA
ADR0 7 SDA
ADIN 5 6 SCL
ADIN 5 6 SCL
MS PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
10-LEAD (3mm 3mm) PLASTIC DFN T = 150C, = 85C/W
JMAX JA
T = 150C, = 45C/W
JMAX JA
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
LTC4151-1 LTC4151-1
TOP VIEW
+ TOP VIEW
SENSE 1 10 SENSE
+
SENSE 1 10 SENSE
V 9 GND
2
IN
V 2 9 GND
IN
11
3
ADR1 8 SDAO
ADR1 3 8 SDAO
ADR0 4 7 SDAI
ADR0 4 7 SDAI
ADIN 5 6 SCL
ADIN 5 6 SCL
MS PACKAGE
10-LEAD PLASTIC MSOP
DD PACKAGE
10-LEAD (3mm 3mm) PLASTIC DFN
T = 125C, = 85C/W
JMAX JA
T = 125C, = 45C/W
JMAX JA
EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL
LTC4151-2
TOP VIEW
+
SENSE 1 16 SENSE
V 2 15 NC
IN
NC 3 14 NC
NC 4 13 GND
ADR1 5 12 SDAO
NC 6 11 SDAI
ADR0 7 10 SCL
NC 8 9 ADIN
S PACKAGE
16-LEAD PLASTIC SO
T = 150C, = 100C/W
JMAX JA
4151ff
2 For more information www.linear.com/LTC4151
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