Audio amplifier OPA2134

operationalanalog2-channel

Overview
The OPA2134 is a dual FET-input audio operational amplifier from the OPAx134 family, specified for low distortion and low-noise audio applications. It features a true FET input stage, wide output swing (to within ~1 V of the rails), unity-gain stability and stable operation with capacitive loads. Available in single, dual and quad variants and in PDIP, SOIC and SO-14 packages. SPICE macromodels and reference designs are provided for design validation.

Key features

• Burr-Brown™ Audio processing; audio-optimized FET-input architecture
• Ultra-low distortion: THD+N typ. 0.00008% at 1 kHz
• Low noise: Vn typ. 8 nV/√Hz at 1 kHz
• True FET input: low input bias current (IB ≈ 5 pA typ.)
• High speed: slew rate typ. 20 V/µs; GBW typ. 8 MHz
• Wide supply range: single or dual operation, ±2.5 V to ±18 V (total supply 5 V to 36 V)
• Unity-gain stable; low crosstalk in dual/quad due to independent channel circuitry

Product details
The device is unity-gain stable and specified for operation from –40 °C to +85 °C. Dual and quad versions use independent channels to minimize crosstalk and preserve stable dynamic behavior across a range of loads, including high capacitive loads. Typical packaging: 8-pin PDIP and SOIC for single/dual; SO-14 for quad. SPICE models and reference simulation files (PSpice/TINA-TI) support system-level simulation and validation.

Technical specifications

• Number of channels: 2 (dual)
• Total supply voltage (min): 5 V
• Total supply voltage (max): 36 V
• Gain-bandwidth product (GBW, typ): 8 MHz
• Slew rate (typ): 20 V/µs
• Rail-to-rail: No
• Input offset voltage Vos (max, 25 °C): 2 mV
• Quiescent current per channel (typ): 4 mA
• Input voltage noise Vn at 1 kHz (typ): 8 nV/√Hz
• THD+N at 1 kHz (typ): 0.00008 %
• Output current Iout (typ): 0.04 A
• Architecture: FET-input (JFET)
• CMRR (typ): 100 dB
• Input bias current (max): 100 pA
• Operating temperature range: –40 °C to +85 °C