1 Features

• Supply Range: 2.7 V to 36 V, ±1.35 V to ±18 V

• Low Noise: 19 nV/√Hz

• RFI Filtered Inputs

• Input Range Includes the Negative Supply

• Input Range Operates to Positive Supply

• Rail-to-Rail Output

• Gain Bandwidth: 1.2 MHz

• Low Quiescent Current: 110 μA per Amplifier

• High Common-Mode Rejection: 120 dB

• Low Bias Current: 15 pA (Maximum)

• Industry-Standard Packages and micro Packages

Available

• Create a Custom Design Using the OPAx170 With

the WEBENCH® Power Designer

2 Applications

• Tracking Amplifier in Power Modules

• Merchant Power Supplies

• Transducer Amplifiers

• Bridge Amplifiers

• Temperature Measurements

• Strain Gauge Amplifiers

• Precision Integrators

• Battery-Powered Instruments

• Test Equipment

3 Description

The OPA170, OPA2170, and OPA4170 devices

(OPAx170) are a family of 36-V, single-supply, lownoise

operational amplifiers (op amps) that feature

micro packages with the ability to operate on supplies

ranging from 2.7 V (±1.35 V) to 36 V (±18 V). They

offer good offset, drift, and bandwidth with low

quiescent current. The single, dual, and quad

versions all have identical specifications for maximum

design flexibility.

Unlike most op amps, which are specified at only one

supply voltage, the OPAx170 family of op amps is

specified from 2.7 V to 36 V. Input signals beyond the

supply rails do not cause phase reversal. The

OPAx170 family is stable with capacitive loads up to

300 pF. The input can operate 100 mV below the

negative rail and within 2 V of the positive rail for

normal operation. Note that these devices can

operate with full rail-to-rail input 100 mV beyond the

positive rail, but with reduced performance within 2 V

of the positive rail. The OPAx170 op amps are

specified from –40°C to +125°C.