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.