LTC4151IMS#PBF Linear Technology, LTC4151IMS#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC4151IMS#PBF
• Description: IC CURRENT MONITOR(12BIT) 10MSOP
• Manufacturer: Linear Technology

Specifications of LTC4151IMS#PBF

• Function: Current Monitor (12 Bit)
• Sensing Method: High-Side
• Accuracy: ±1%
• Voltage - Input: 7 ~ 80 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Voltage Supervisor Type: Voltage Monitor
• Number Of Voltage Supervisors: 1
• Reset Threshold Voltage (min): 2.3V
• Reset Threshold Voltage (max): 2.9V
• Operating Supply Voltage (min): 7V
• Operating Supply Voltage (max): 80V
• Package Type: MSOP
• Operating Temperature Classification: Industrial
• Operating Temp Range: -40C to 85C
• Pin Count: 10
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Compliant

PIN FUNCTIONS
GND: Device Ground.
SENSE
external sense resistor between SENSE
The differential voltage between SENSE
BLOCK DIAGRAM
OPERATION
The LTC4151 accurately monitors high side current and
voltages. This device accepts a wide range of input volt-
ages from as low as 7V up to 80V and consumes less
than 1.7mA quiescent current in normal operation. A
shutdown mode is available with the LTC4151 to reduce
the quiescent current to less than 300μA by pulling the
SHDN pin below 1V.
In default continuous scan mode after power-up, the
onboard 12-bit analog-to-digital converter (ADC) continu-
ously and sequentially measures the high side differen-
tial voltage between SENSE
SENSE
amplifi er, the input voltage V
an internal voltage divider, and the voltage applied to the
ADIN pin (full-scale 2.048V). The reference voltage of the
ADC is internally set to 2.048V. The digital data obtained
by the ADC is stored in the onboard registers.
–
–
: High Side Current Sense Input. Connect an
(full-scale 81.92mV) through an internal sense
V
IN
V
735k
15k
IN
GND
IN
INTERNAL
POWER
+
(full-scale 102.4V) through
(Kelvin sense of V
+
SENSE
25X
R
S
+
+
ADIN
–
+
and SENSE
SENSE
and SENSE
MUX
–
IN
) and
–
–
is
.
6.3V
5μA
SHUTDOWN
CONTROL
12-BIT ADC
monitored by the onboard ADC with a full-scale sense
voltage of 81.92mV.
Exposed Pad (DD Package Only): Exposed pad may be
left open or connected to device ground (GND).
In snapshot mode, the LTC4151 can perform on-demand
measurement of a selected voltage without the need of
continuous polling by a master controller. The snapshot
mode is enabled by programming the control register
through the I
monitors the ADC’s conversion. When the conversion is
completed, the 12-bit digital code of the measured voltage
is held in the corresponding data registers.
The LTC4151 provides an I
from the data registers and to program the control register.
Two three-state pins, ADR0 and ADR1, are used to decode
nine device addresses (see Table 1). The LTC4151 features
a single SDA pin to handle both input data and output data,
while the LTC4151-1/LTC4151-2 provide separate data in
(SDAI) and data out (SDAO on the LTC4151-1 and SDAO
on the LTC4151-2) pins to facilitate opto-isolation.
V
REF
SHDN
(LTC4151)
= 2.048V
2
C interface. A status bit in the data register
REGISTERS
DECODER
ADR1
I
2
C/
ADR0
2
C interface to read the ADC data
6V
6V
SDAO/SDAO
(LTC4151-1/
LTC4151-2)
LTC4151-1)
SDA/SDAI
(LTC4151/
SCL
4151 BD
LTC4151
4151fb
7