LTC4151_15 Datasheet, PDF (1/18 Pages) Linear Technology – High Voltage I2C Current and Voltage Monitor

Features
n _{Wide Operating Voltage Range: 7V to 80V}
n _{12-Bit Resolution for Both Current and Voltages}
n _I²_{C Interface}
n _{Additional ADC Input Monitors an External Voltage}
n _{Continuous Scan and Snapshot Modes}
n _{Shutdown Mode (LTC4151) Reduces Quiescent}
Current to 120µA
n _{Split SDA for Opto-Isolation (LTC4151-1/LTC4151-2)}
n _{Available in 10-Lead MSOP, 10-Lead 3mm × 3mm}
DFN and 16-Lead SO Packages
Applications
n _{–48V Telecom Infrastructure}
n _Automotive
n _Industrial
n _Consumer
LTC4151
High Voltage I²C Current
and Voltage Monitor
Description
The LTC^®4151 is a high side power monitor that operates
over a wide voltage range of 7V to 80V. In default operation
mode, the onboard 12-bit ADC continuously measures
high side current, input voltage and an external voltage.
Data is reported through the I²C interface when polled
by a host. The LTC4151 can also perform on-demand
measurement in a snapshot mode. The LTC4151 features
a dedicated shutdown pin to reduce power consumption.
The LTC4151‑1/LTC4151-2 feature split I²C data pins to
drive opto-isolators. The data out on the LTC4151-1 is
inverted while that on the LTC4151-2 is not.
PART
PACKAGE
FEATURED PIN
LTC4151
DD10, MS10
SHDN
LTC4151-1
DD10, MS10
SDAO
LTC4151-2
S16
SDAO
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
High Side Power Sensing with Onboard ADC and I²C
V_IN
7V TO 80V
0.02Ω
SENSE⁺ SENSE^–
V_IN
SHDN
LTC4151
SCL
ADR1
SDA
ADR0
ADIN
GND
3.3V
V_OUT
2k 2k
V_DD
µCONTROLLER
MEASURED
VOLTAGE
SCL
SDA
GND
4151 TA01
For more information www.linear.com/LTC4151
12-Bit ADC DNL and INL
1.0
0.5
0
–0.5
–1.0
0
1.0
1024
2048
CODE
3072
4096
4151 TA01b
0.5
0
–0.5
–1.0
0
1024
2048
CODE
3072
4096
4151 TA01c
4151ff
1