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LTC4151CDD-1-TRPBF Datasheet(PDF) 6 Page - Linear Technology

Part # LTC4151CDD-1-TRPBF
Description  High Voltage I2C Current and Voltage Monitor
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4151CDD-1-TRPBF Datasheet(HTML) 6 Page - Linear Technology

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LTC4151/LTC4151-1
6
41511fa
PIN FUNCTIONS
SENSE+ (Pin 1): Kelvin Sense of the VIN Pin. See Figure 10
for recommended Kelvin connection.
VIN (Pin 2): Supply Voltage Input. Accepts 7V to 80V.
The voltage at this pin is monitored by the onboard ADC
with a full-scale input range of 102.4V. SENSE+ must be
connected to VIN for proper ADC readout.
ADR1, ADR0 (Pin 3, Pin 4): I2C Device Address Inputs.
Connecting ADR1 and ADR0 to VIN, GND or leaving the pins
open configures one of nine possible addresses. See Table 1
in the Applications Information section for details.
ADIN (Pin 5): ADC Input. The onboard ADC measures volt-
age range between 0V and 2.048V. Tie to GND if unused.
SCL (Pin 6): I2C Bus Clock Input. Data is shifted in and out
at the SDA pin on rising edges of SCL. This pin is driven
by an open collector output from a master controller. An
external pull-up resistor or current source is required and
can be placed between SCL and VIN. The voltage at SCL
is internally clamped to 6V (5.5V minimum).
SDA (Pin 7, LTC4151 Only): I2C Bus Data Input/Output.
Used for shifting in address, command or data bits and
sending out data. An external pull-up resistor or current
source is required and can be placed between SDA and VIN.
The voltage at SDA is internally clamped to 6V (5.5V
minimum).
SDAI (Pin 7, LTC4151-1 Only): I2C Bus Data Input. Used
for shifting in address, command or data bits. This pin is
driven by an open collector output from a master controller.
An external pull-up resistor or current source is required
and can be placed between SDAI and VIN. The voltage at
SDAI is internally clamped to 6V (5.5V minimum).
SDAO (Pin 8, LTC4151-1 Only): Inverted Serial Bus Data
Output. Open-drain output used for sending data back to the
master controller or acknowledging a write operation. Data
is inverted for convenience of optoisolation. An external
pull-up resistor or current source is required.
SHDN (Pin 8, LTC4151 Only): Shutdown Input. Internally
pulled up to 6.3V. Pull this pin below 1V to force the LTC4151
into shutdown mode. Leave this pin open if unused.
GND (Pin 9): Device Ground.
SENSE(Pin 10):
High Side Current Sense Input. Connect
an external sense resistor between SENSE+ and SENSE.
The differential voltage between SENSE+ and SENSEis
monitored by the onboard ADC with a full-scale sense
voltage of 81.92mV.
Exposed Pad (Pin 11, DD Package Only): Exposed pad
may be left open or connected to device ground (GND).
(DD/MS)
TYPICAL PERFORMANCE CHARACTERISTICS V
IN = 12V, TA = 25°C, unless noted.
SDA, SDAO Output Low vs
Pull-Up Current (VSDA(OL) vs ISDA)
SDA, SDAI, SCL Clamp Voltage
vs Load Current
ISDA (mA)
0
0.3
0.4
20
0.2
0.1
0
5
10
15
0.5
41511 G09
– 40°C
25°C
85°C
ILOAD (mA)
0.01
0.1
1
10
6.2
6.1
6.0
5.9
6.3
41511 G10
– 40°C
85°C
25°C


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