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ADM1191 Datasheet(PDF) 6 Page - Analog Devices

No. de pieza ADM1191
Descripción Electrónicos  Digital Power Monitor with Convert Pin and ALERTB Output
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Página de inicio  http://www.analog.com
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ADM1191 Datasheet(HTML) 6 Page - Analog Devices

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ADM1191
Rev. B | Page 6 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
VCC
1
SENSE
2
CONV
3
GND
4
SETV
5
ALERTB
10
A1
9
A0
8
SDA
7
SCL
6
ADM1191
TOP VIEW
(Not to Scale)
Figure 3. Pin Configuration
Table 4. Pin Function Descriptions
Pin No.
Mnemonic
Description
1
VCC
Positive Supply Input Pin. The operating supply voltage range is from 3.15 V to 26 V. An undervoltage lockout
(UVLO) circuit resets the ADM1191 when a low supply voltage is detected.
2
SENSE
Current Sense Input Pin. A sense resistor between the VCC pin and the SENSE pin generates a voltage across
a sense resistor. This voltage is proportional to the load current. A current sense amplifier amplifies this
voltage before it is digitized by the ADC.
3
CONV
Convert Start Pin. A high level on this pin enables an ADC conversion. The state of an internal control register,
which is set through the I2C interface, configures the part to convert current only, voltage only, or both
channels when the convert pin is asserted.
4
GND
Chip Ground Pin.
5
SETV
Input Pin. The voltage driven onto this pin is compared with the output of the internal current sense amplifier.
The lower the voltage on the SETV, the lower the current level that causes the ALERTB output to assert.
6
SCL
I2C Clock Pin. Open-drain input; requires an external resistive pull-up.
7
SDA
I2C Data I/O Pin. Open-drain input/output; requires an external resistive pull-up.
8
A0
I2C Address Pin. This pin can be tied low, tied high, left floating, or tied low through a resistor. Sixteen I2C
address options are available, depending on the external configuration of the A0 pin and the A1 pin.
9
A1
I2C Address Pin. This pin can be tied low, tied high, left floating, or tied low through a resistor. Sixteen I2C
address options are available, depending on the external configuration of the A0 pin and the A1 pin.
10
ALERTB
Alert Output Pin. Active low, open-drain configuration. This pin asserts low when an overcurrent condition is
present. The level at which an overcurrent condition is detected depends on the voltage on the SETV pin.


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