1 Features

1• Low IQ: 150 μA/ch

• Wide Supply Range: 1.8 V to 5.5 V

• Low Noise: 14 nV/√Hz at 1 kHz

• Gain Bandwidth: 3 MHz

• Low Input Bias Current: 0.2 pA

• Low Offset Voltage: 0.5 mV

• Unity-Gain Stable

• Internal RF/EMI Filter

• Extended Temperature Range:

–40°C to 125°C

2 Applications

• Battery-Powered Instruments:

– Consumer, Industrial, Medical

– Notebooks, Portable Media Players

• Photodiode Amplifiers

• Active Filters

• Remote Sensing

• Wireless Metering

• Handheld Test Equipment

3 Description

The OPA314 family of single-, dual-, and quad-

channel operational amplifiers represents a new generation of low-power, general-purpose CMOS

amplifiers. Rail-to-rail input and output swings, low

quiescent current (150 μA typically at 5 VS) combined

with a wide bandwidth of 3 MHz, and very low noise (14 nV/√Hz at 1 kHz) make this family very attractive

for a variety of battery-powered applications that

require a good balance between cost and

performance. The low input bias current supports

applications with MΩ source impedances.

The robust design of the OPA314 devices provides

ease-of-use to the circuit designer: unity-gain stability

with capacitive loads of up to 300 pF, an integrated RF/EMI rejection filter, no phase reversal in overdrive

conditions, and high electrostatic discharge (ESD)

protection (4-kV HBM).

These devices are optimized for low-voltage

operation as low as 1.8 V (±0.9 V) and up to 5.5 V

(±2.75 V), and are specified over the full extended temperature range of –40°C to 125°C.

The OPA314 (single) is available in both SC70-5 and SOT23-5 packages. The OPA2314 (dual) is offered in

SO-8, MSOP-8, and DFN-8 packages. The quadchannel

OPA4314 is offered in a TSSOP-14 package.