Low power operational amplifiers for cost-sensitive systems

Texas Instruments’ TLVx170 family of EMI-hardened, 36V, single-supply, low-noise operational amplifiers feature a THD+N of 0.0002% at 1kHz with the ability to operate on supplies ranging from 2.7V (±1.35V) to 36V (±18V). These features, along with low noise and very high PSRR, make the single-channel, dual-channel and quad-channel devices suitable for use in microvolt-level signal amplification. The family of devices also offer good offset, drift, and bandwidth with low quiescent current. Unlike most op amps that are specified at only one supply voltage, the family of devices is specified from 2.7V to 36V with the ability to swing input signals beyond the supply rails without phase reversal. The family is also unity-gain stable with a 200pF capacitive load with a 1.2MHz bandwidth and a 0.4V/µs slew rate for use in current-to-voltage converters. The device inputs can operate 100mV below the negative rail and within 2V of the positive rail for normal operation, and with full rail-to-rail input with reduced performance. The devices are specified from –40C to +125C.