LTC4151-1 Linear Technology, LTC4151-1 Datasheet - Page 6

• Manufacturer Part Number: LTC4151-1
• Description: High Voltage I2C Current and Voltage Monitor
• Manufacturer: Linear Technology

LTC4151/LTC4151-1
TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
SENSE
for recommended Kelvin connection.
V
The voltage at this pin is monitored by the onboard ADC
with a full-scale input range of 102.4V. SENSE
connected to V
ADR1, ADR0 (Pin 3, Pin 4): I
Connecting ADR1 and ADR0 to V
open confi gures 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): I
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 V
is internally clamped to 6V (5.5V minimum).
SDA (Pin 7, LTC4151 Only): I
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 V
The voltage at SDA is internally clamped to 6V (5.5V
minimum).
6
IN
(Pin 2): Supply Voltage Input. Accepts 7V to 80V.
+
(Pin 1): Kelvin Sense of the V
2
C Bus Clock Input. Data is shifted in and out
IN
0.5
0.3
0.2
0.1
0.4
0
for proper ADC readout.
0
SDA, SDAO Output Low vs
Pull-Up Current (V
5
(DD/MS)
I
2
2
SDA
C Device Address Inputs.
C Bus Data Input/Output.
IN
10
(mA)
, GND or leaving the pins
SDA(OL)
IN
. The voltage at SCL
IN
Pin. See Figure 10
15
vs I
– 40°C
41511 G09
SDA
85°C
25°C
+
)
20
must be
IN
.
SDAI (Pin 7, LTC4151-1 Only): I
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 V
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
an external sense resistor between SENSE
The differential voltage between SENSE
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).
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6.2
6.1
6.0
5.9
6.3
–
0.01
(Pin 10): High Side Current Sense Input. Connect
SDA, SDAI, SCL Clamp Voltage
vs Load Current
– 40°C
85°C
V
IN
= 12V, T
25°C
0.1
I
LOAD
A
= 25°C, unless noted.
(mA)
1
2
C Bus Data Input. Used
41511 G10
10
IN
+
. The voltage at
and SENSE
+
and SENSE
41511fa
–
–
is
.
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