ADM1191-2ARMZ-R71(RevB) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADM1191-2ARMZ-R71
(Rev.:RevB)

Digital Power Monitor with Convert Pin and ALERTB Output

Analog Devices 

ADM1191

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VCC 1

SENSE 2

CONV 3

GND 4

SETV 5

10 ALERTB

ADM1191

TOP VIEW

(Not to Scale)

9 A1

8 A0

7 SDA

6 SCL

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.

Rev. B | Page 6 of 16

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