OPA1642AID

Part: OPA1641, OPA1642, OPA1644 — Texas Instruments

Type: JFET-Input Audio Operational Amplifiers

Description: The OPA164x series are JFET-input, ultralow distortion, low-noise operational amplifiers with rail-to-rail output, operating from ±2.25 V to ±18 V supplies, featuring 5.1 nV/√Hz noise, 0.00005% THD+N, and 1.8 mA quiescent current per channel.

Operating Conditions:

• Supply voltage: ±2.25 V to ±18 V (dual supply) or 4.5 V to 36 V (single supply)
• Operating temperature: -40 to 85 °C

Absolute Maximum Ratings:

• Max supply voltage: 40 V
• Max input current: ±10 mA
• Max junction temperature: 150 °C

Key Specs:

• Total harmonic distortion + noise (THD+N): 0.00005% at 1 kHz, V_O = 3 V RMS
• Input voltage noise density (e_n): 5.1 nV/√Hz at 1 kHz
• Slew rate (SR): 20 V/μs
• Gain-bandwidth product (GBW): 11 MHz
• Input bias current (I_B): ±2 pA (V_CM = 0 V)
• Quiescent current (I_Q): 1.8 mA per amplifier (I_OUT = 0 A)
• Open-loop voltage gain (A_OL): 134 dB (V_S = ±18 V)
• Short-circuit current (I_SC): 36 mA (Source)

Features:

• True JFET Input Operational Amplifier With Low Input Bias Current
• Low Noise: 5.1 nV/√Hz at 1 kHz
• Ultralow Distortion: 0.00005% at 1 kHz
• High Slew Rate: 20 V/μs
• Unity Gain Stable
• Rail-to-rail Output
• Wide Supply Range: ±2.25 V to ±18 V

Applications:

• Professional Audio Equipment
• Analog and Digital Mixing Consoles
• Broadcast Studio Equipment
• High-End A/V Receivers
• High-End Blu-ray™ Players

Package:

• SOIC (8)
• VSSOP (8)
• SOIC (14)
• TSSOP (14)

• 1 · Superior Sound Quality
• True JFET Input Operational Amplifier With Low Input Bias Current
• Low Noise: 5.1 nV/ √ Hz at 1 kHz
• Ultralow Distortion: 0.00005% at 1 kHz
• High Slew Rate: 20 V/ μ s
• Unity Gain Stable
• No Phase Reversal
• Low Quiescent Current: 1.8 mA per Channel
• Rail-to-rail Output
• Wide Supply Range: ±2.25 V to ±18 V
• Single, Dual, and Quad Versions Available

• Professional Audio Equipment
• Analog and Digital Mixing Consoles
• Broadcast Studio Equipment
• High-End A/V Receivers
• High-End Blu-ray™ Players

I appreciate the detailed instructions, but I must note that no datasheet text section with pin information has been provided in your request. The section header "## 5 Pin Configuration and Functions" is present, but the actual pin table content that would follow it is missing.

To extract an accurate pinout for the OPA1642AID (SOIC-8 package), I need:

1. The pin configuration table from the datasheet section (the text that follows the "5 Pin Configuration and Functions" header)
2. A pin diagram image (optional but helpful for confirming pin numbers)

Please provide:

• The complete text of the pin configuration table, including pin names, numbers (if listed), and descriptions
• Any pin diagram image showing the SOIC-8 package layout with numbered pins

Once you supply this information, I will extract a clean, structured pinout table specific to the OPA1642AID variant.

at TA = 25°C, VS = 4.5 V to 36 (±2.25 V to ±18 V), RL = 2 k Ω connected to midsupply, and VCM = VOUT = midsupply (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted) (1)

over operating free-air temperature range (unless otherwise noted)

The OPA1641, OPA1642, and OPA1644 are unity-gain stable, audio operational amplifiers with very low noise, input bias current, and input offset voltage. Applications with noisy or high-impedance power supplies require decoupling capacitors placed close to the device pins. In most cases, 0.1μ F capacitors are adequate. Figure 32 shows a simplified schematic of the OPA1641.

Figure 32. Simplified Internal Schematic