INA199 26-V, Bidirectional, Zero-Drift, Low- or High-Side,

Voltage-Output, Current-Shunt Monitor

1 Features

• Wide Common-Mode Range: –0.3 V to 26 V

• Offset Voltage: ±150 μV (Maximum)

(Enables Shunt Drops of 10-mV Full-Scale)

• Accuracy:

– Gain Error (Maximum Over Temperature):

• ±1% (C Version)

• ±1.5% (A and B Versions)

– 0.5-μV/°C Offset Drift (Maximum)

– 10-ppm/°C Gain Drift (Maximum)

• Choice of Gains:

– INA199x1: 50 V/V

– INA199x2: 100 V/V

– INA199x3: 200 V/V

• Quiescent Current: 100 μA (Maximum)

• Packages: 6-Pin SC70, 10-Pin UQFN

2 Applications

• Notebook Computers

• Cell Phones

• Qi-Compliant Wireless Charging Transmitters

• Telecom Equipment

• Power Management

• Battery Chargers

3 Description

The INA199 series of voltage-output, current-shunt

monitors (also called current-sense amplifiers) are

commonly used for overcurrent protection, precision-

current measurement for system optimization, or in

closed-loop feedback circuits. This series of devices

can sense drops across shunt resistors at common-

mode voltages from –0.3 V to 26 V, independent of

the supply voltage. Three fixed gains are available:

50 V/V, 100 V/V, and 200 V/V. The low offset of the

zero-drift architecture enables current sensing with

maximum drops across the shunt as low as 10-mV

full-scale.

These devices operate from a single 2.7-V to 26-

V power supply, drawing a maximum of 100 µA

of supply current. All versions are specified from –

40°C to 125°C, and offered in both SC70-6 and thin

UQFN-10 packages.

Device Information

PART NUMBER

PACKAGE(1)

BODY SIZE (NOM)

INA199

SC70 (6)

2.00 mm × 1.25 mm

UQFN (10)

1.80 mm × 1.40 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

V+

OUT

GND

IN-

IN+

C

BYPASS

0.01 F

m

to

0.1 F

m

2.7 V to 26 V

REF

Reference

Voltage

Supply

Load

R

SHUNT

Output

R

1

R

3

R

2

R

4

Simplified Schematic

INA199

SBOS469H – APRIL 2009 – REVISED OCTOBER 2023

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.