ADM1191

Rev. 0 | 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

ADM1191ARMZ

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,

channels when the convert pin is asserted.

4

GND

Chip Ground Pin.

5

SETV

Input Pin. The voltage driven onto this pin is compared to 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

7

SDA

8

A0

9

A1

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.