The OPA1662-Q1 is a dual, bipolar-input operational amplifier which is well suited for
premium audio external amplifier applications in infotainment and cluster systems. In audio
systems, the main concern is to ensure a clear, quality output signal which means minimuzing any
noise introduced to the signal. The OPA1662-Q1 offers low noise density with an ultra-low
distortion of 0.00006% at 1 kHz that maximizes the signal output. Additionally, this op amp offers
rail-to-rail output swing to within 600 mV with 2-kΩ load. The wide headroom ensures that the
output signal does not clip, and therefore preserves the audio quality.
The OPA1662-Q1 operates over a very wide supply range of ±1.5 V to ±18 V, or 3 V to 36 V,
on only 1.5 mA of supply current per channel. The wide supply range enables design
flexibility for the device as it can be integrated from a power amplifier driven by the battery to
being driven from an ADC to DAC for low-power applications. Additionally, this device also has a
high-output drive capability of ±30 mA and can act as the sole audio amplifier for low-power
applications, such as for cluster chimes.
The device also features completely independent circuitry for each of the two channels to
enable low crosstalk and freedom from interactions between each channel, even when overdriven or
overloaded. This feature enables customers to drive two different audio signals with ease of mind
that the signals are not affected by each other.
The OPA1662-Q1 offers a wide bandwidth of 22 MHz and high slew rate of 17 V/µs which is
applicable as a high and low side sensing for ripple currents in SMPS devices or motor drives. As a
current sensor, the OPA1662-Q1 can be used as peak current mode control, with the op amps offering
stability and enabling higher bandwidth for the system. The OPA1662-Q1 is applicable in body
control modules and HEV or EV converters where motors typically are used.
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