The dual-channel OPA1678-Q1 and quad-channel OPA1679-Q1 (OPA167x-Q1) operational amplifiers offer higher system-level performance over legacy op amps commonly used in audio circuitry. The OPA167x-Q1 amplifiers achieve a low 4.5-nV/√Hz noise density and low distortion of 0.0001% at 1 kHz, which improves audio signal fidelity. These devices also offer rail-to-rail output swing to within 800 mV with a 2-kΩ load, which increases headroom and maximizes dynamic range.
To accommodate the power-supply constraints of many types of audio products, the OPA167x-Q1 operate over a very wide supply range of ±2.25 V to ±18 V (or 4.5 V to 36 V) on only 2 mA of supply current. These op amps are unity-gain stable and have excellent dynamic behavior over a wide range of load conditions allowing the OPA167x-Q1 to be used in many audio circuits.
The OPA167x-Q1 temperature ranges are specified from –40°C to +125°C.
| Number of channels | 4 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) | 4.5 |
| Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) | 36 |
| GBW (typ) (MHz) | 16 |
| Slew rate (typ) (V/µs) | 9 |
| Rail-to-rail | Out |
| Vos (offset voltage at 25°C) (max) (mV) | 2 |
| Iq per channel (typ) (mA) | 2 |
| Vn at 1 kHz (typ) (nV√Hz) | 4.5 |
| Features | Small Size |
| THD + N at 1 kHz (typ) (%) | 0.0001 |
| Rating | Automotive |
| Operating temperature range (°C) | -40 to 125 |
| Iout (typ) (A) | 0.025 |
| Architecture | CMOS |
| CMRR (typ) (dB) | 110 |
| WQFN (RUM) | 16 | 16 mm² 4 x 4 |
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