+

±

OPA2834-1

¶

¶

¶

LOA D

¶

ADS704 6

+

±

Sho rt-

Circuit Fault

Detection

+

±

OPA2834-2

¶¶

¶¶

GND

TL V3201

Frequency (Hz)

-160

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

0

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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. ADVANCE INFORMATION for pre-production products; subject to

change without notice.

OPA2834

SBOS973 – JUNE 2019

OPA2834 50-MHz, 170-µA, Negative-Rail In, Rail-to-Rail Out, Voltage-Feedback Amplifier

1

1 Features

1

•

Ultra-low power:

–

Supply voltage: 2.7 V to 5.4 V

–

Quiescent current: 170 µA/ch (typical)

•

Bandwidth: 50 MHz (G = 1 V/V)

•

Slew rate: 26 V/µs

•

•

Input voltage noise: 12 nV/

√Hz (f = 10 kHz)

•

Input offset voltage: 350 µV (±1.5 mV, maximum)

•

Negative rail input, rail-to-rail output (RRO)

–

Input voltage range: –0.2 V to 3.9 V

(5-V supply)

•

Operating temperature range:

–40°C to +125°C

2 Applications

•

Current sensing in power supplies

•

Low-power signal conditioning

•

Vibration monitoring

•

Field transmitters

•

Wireless microphones

•

Low-power SAR and ΔΣ ADC driver

•

Ultrasonic flow meters

3 Description

The OPA2834 is a dual-channel, ultra-low-power, rail-

to-rail output, negative-rail input, voltage-feedback

(VFB) operational amplifier designed to operate over

a power-supply range of 2.7 V to 5.4 V with a single

supply, or ±1.35 V to ±2.7 V with a dual supply.

Consuming only 170 µA per channel and with a unity-

gain bandwidth of 50 MHz, this amplifier sets an

industry-leading performance-to-power ratio for rail-

to-rail amplifiers.

For battery-powered, portable applications where

power

is

of

key

importance,

the

low

power

consumption, wide bandwidth, and ultra-low distortion

performance of the OPA2834 offers performance

versus power that is not attainable in other devices.

See the Device Comparison Table for a selection of

low-power, low-noise, 5-V amplifiers from Texas

Instruments with a gain-bandwidth product from

20 MHz to 300 MHz.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

OPA2834

VSSOP (8)

3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Low-Side Current-Shunt Monitoring Application