LTC4151 Datasheet, PDF (1/16 Pages) Linear Technology – High Voltage I2C Current and Voltage Monitor

LTC4151/LTC4151-1
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 Optoisolation (LTC4151-1)}
n _{Tiny 10-Lead MSOP and 3mm × 3mm DFN Packages}
APPLICATIONS
n _{Telecom Infrastructure}
n _Automotive
n _Industrial
n _Consumer
DESCRIPTION
The LTC^®4151 and LTC4151-1 are high side power
monitors that operate 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 monitors can also
perform on-demand measurement in a snapshot mode.
The LTC4151 features a dedicated shutdown pin to reduce
power consumption. The LTC4151-1 features split I²C
data pins with data in and an inverted data output to drive
optoisolators.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
V_IN
7V to 80V
High Side Power Sensing with Onboard ADC and I²C
0.02Ω
SENSE⁺ SENSE^–
V_IN
ADR1
ADR0
LTC4151
SHDN
SCL
SDA
ADIN
GND
V_OUT
2k
2k
MEASURED
VOLTAGE
3.3V
V_DD
μCONTROLLER
SCL
SDA
41511 TA01
12-Bit ADC DNL and INL
1.0
0.5
0
–0.5
–1.0
0
1.0
1024
2048
CODE
3072
4096
41511 TA01b
0.5
0
–0.5
–1.0
0
1024
2048
CODE
3072
4096
41511 TA01c
41511fa
1