OPA2171AQDRQ1

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1. Description

The OPA2171AQDRQ1 family of devices is a 36-V, singlesupply, low-noise operational amplifier (op amp) with the ability to operate on supplies ranging from 2.7 V (±1.35 V) to 36 V (±18 V). This series is available in multiple packages and offers low offset, drift, and 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 OPA2171AQDRQ1 family of devices is specified from 2.7 V to 36 V. Input signals beyond the supply rails do not cause phase reversal. The OPA2171AQDRQ1 family of devices 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 top rail during normal operation. The device can operate with full rail-to-rail input 100 mV beyond the top rail, but with reduced performance within 2 V of the top rail. The OPA2171AQDRQ1 op amp family is specified from – 40°C to +125°C.

2. Features

    1. Qualified for automotive applications

    2. AEC-Q100 test guidance with the following results:

        – Temperature grade 1: 

        –40°C to +125°C ambient operating temperature

    3. Supply range:

        – Single-supply: 2.7 V to 36 V

        – Dual-supply ±1.35 V to ±18 V

    4. Low noise: 14 nV/√Hz at 1 kHz

    5. Low offset drift: ±0.3 µV/°C (typical)

    6. Input range includes negative supply

    7. Input range operates to positive supply with reduced performance

    8. Rail-to-rail output

    9. Gain bandwidth: 3 MHz

  10. Low quiescent current: 475 µA per amplifier

  11. High Common-mode rejection: 120 dB (typical)

  12. Low input bias current: 10 pA

  13. Industry-Standard Package:

        – 5-Pin Small-Outline Transistor SOT-23 (DBV) Package

3. Applications

    1. Tracking amplifier in power modules

    2. Merchant power supplies

    3. Transducer amplifiers

    5. Bridge amplifiers

    6. Temperature measurements

    7. Strain gauge amplifiers

    8. Precision integrators

    9. Battery-powered instruments

  10. Test equipment

4. Application Information

The OPAx171-Q1 operational amplifier family provides high overall performance, making the device ideal for many general-purpose applications. The excellent offset drift of only 2 µV/°C provides excellent stability over the entire temperature range. In addition, the device offers very good overall performance with high CMRR, PSRR, and AOL. As with all amplifiers, applications with noisy or high-impedance power supplies require decoupling capacitors close to the device pins. In most cases, 0.1-µF capacitors are adequate.