Thumbnail Filmstrip of IC Module OPA627AU Single DIL Images

OPA627AU Single Op-Amp Audio Upgrade Module - SMD8 on BD970601 to DIL8

The OPA627AU is a high-precision, low-noise single JFET-input operational amplifier manufactured by Texas Instruments / Burr-Brown, pre-mounted on a BrownDog 970601 adapter board to convert the surface-mount SOIC-8 (SO8) package into a standard 8-pin DIL (DIP-8) footprint. Renowned among hi-fi builders for its warm, valve-like sound, the OPA627 offers a laid-back, highly musical character with smooth highs and exceptional dynamic detail, making it an outstanding upgrade for leaded DIL op-amps.

Important Configuration Note - Single Op-Amp Module:

This is a SINGLE Op-Amp Module: This module contains one single-channel OPA627AU operational amplifier chip on an adapter.
Direct Replacement For: Standard single-channel 8-pin DIL (DIP-8) operational amplifiers including the NE5534, OPA604, OPA134, AD797, AD811, OPA627BP, OPA637, and similar single-channel pinouts.
NOT Compatible With Dual Op-Amp Sockets: This single module cannot be plugged directly into dual op-amp sockets (such as NE5532, OPA2134, LM4562, or TL072). Plugging a single module into a dual socket will connect power supply rails to signal pins and cause severe component damage. For dual op-amp applications, please view our dual OPA627 modules.

Technical Specifications

Amplifier Type: Single Precision High-Speed Difet (JFET-Input) Operational Amplifier
Module Format: OPA627AU SOIC-8 (SO8) pre-mounted on BD970601 adapter to single 8-pin DIL (DIP-8)
Supply Voltage Range: ±4.5 V to ±18 V (Maximum operating supply: ±18 V / 36 V total)
Gain Bandwidth Product: 16 MHz
Slew Rate: 55 V/μs
Voltage Noise Density: 4.5 nV/√Hz at 10 kHz
Input Bias Current: 5 pA (typical)
Quiescent Current (Iq): 7.0 mA per amplifier
Settling Time: 550 ns to 0.01%
Output Current: 45 mA

For additional details, download the OPA627 data sheet.

Suggested Uses & Applications

CD / DVD / SACD Player Upgrades: Upgrading stock single op-amps in analogue output filter stages and I/V conversion circuits.
DAC Output Buffers & ADC Input Buffers: Providing clean, low-distortion single-channel buffering for audio converters.
High-End Preamplifiers: Line-level gain stages in hi-fi preamps and dedicated headphone amplifiers.
Active Filters & Equalisers: Active crossovers and low-distortion filter networks where smooth tonal performance is required.
Guitar & Instrument Amplifiers: Upgrading pre-amp stages in boutique musical instrument amplifiers for a warm, valve-like sound.

Safety & Operational Warnings (Please Read Before Installation)

Single vs Dual Pinout Verification: Ensure your circuit socket is wired for a standard single op-amp pinout (Pin 1 & 8: Offset Trim / NC, Pin 2: -In, Pin 3: +In, Pin 4: V-, Pin 6: Output, Pin 7: V+). Plugging a single op-amp into a dual op-amp socket will direct power supply voltage into signal circuits.
Supply Voltage Compatibility: Operating range is ±4.5 V to ±18 V (±36 V total). The OPA627 is fully compatible with standard ±15 V and ±18 V supply rails. Do not exceed ±18 V.
Pin Alignment & Orientation: Verify pin 1 orientation before inserting into the DIL-8 socket. Align the pin 1 dot or notch on the module with the socket on your board. Reversing the module will destroy the IC upon power-up.
Power Supply Decoupling: High-speed 55 V/μs op-amps require clean power delivery to prevent oscillation. Verify 0.1 μF ceramic bypass capacitors are installed close to supply pins.
ESD Protection: Handle the module using static safety precautions to protect the sensitive Difet JFET inputs.
Module Appearance: PCB colour, pin plating, or layout printing may vary slightly across production batches, while technical specifications remain identical.