ltc4151 Linear Technology Corporation, ltc4151 Datasheet - Page 6

• Manufacturer Part Number: ltc4151
• Description: High Voltage I2c Current And Voltage Monitor
• Manufacturer: Linear Technology Corporation

LTC4151/LTC4151-1
TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
SENSE
Connect an external sense resistor between these two pins.
Load current through the sense resistor is monitored by
the onboard 12-bit ADC with a full-scale sense voltage
of 81.92mV.
V
voltage at this pin is monitored by the onboard ADC with
a full-scale input range of 102.4V.
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
voltage 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
6
IN
(Pin 2): Supply Voltage Input. Accepts 7V to 80V. The
+
, SENSE
2
C Bus Clock Input. Data is shifted in and out
0.5
0.3
0.2
0.1
0.4
–
0
(Pin 1, Pin 10): Sense Voltage Inputs.
0
SDA, SDAO Output Low vs
Pull-Up Current (V
5
(DD/MS)
2
2
I
C Device Address Inputs.
SDA
C Bus Data Input/Output.
IN
10
, GND or leaving the pins
(mA)
IN
SDA(OL)
. The voltage at SCL
15
vs I
– 40°C
41511 G09
SDA
85°C
25°C
)
20
sending out data. An external pull-up resistor or current
source is required and can be placed between SDA and
V
minimum).
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.
Exposed Pad (Pin 11, DD Package Only): GND. Must be
soldered to PCB ground.
IN
. The voltage at SDA is internally clamped to 6V (5.5V
6.2
6.1
6.0
5.9
6.3
0.01
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
41511f