IC Module AD8620

AD8620 Dual Op-Amp Audio Upgrade Module - SMD SO8 on BD970601 to DIL8

The AD8620 is a high-precision, low-noise dual JFET-input operational amplifier manufactured by Analog Devices, pre-mounted on a BD970601 adapter board to convert the surface-mount SO8 package into a standard 8-pin DIL (DIP-8) footprint. Widely acclaimed by audio enthusiasts and hi-fi upgraders, the AD8620 delivers high-speed performance, extremely low distortion, and superb tonal accuracy - bringing out clean dynamics, fine micro-details, and precise soundstage timing in high-performance audio equipment.

Important Configuration Note - Dual Op-Amp Module:

• This is a DUAL Op-Amp Module: The AD8620 chip contains two internal operational amplifiers on a single substrate.
• Direct Replacement For: Standard dual 8-pin DIP operational amplifiers such as the NE5532, OPA2134, LM4562, OPA2604, TL072, RC4558, and similar dual-channel pinouts.
• NOT Compatible With Single Op-Amp Sockets: This dual module cannot be used in sockets wired for single op-amps (such as NE5534, OPA627, OPA134, or AD8610). If your circuit requires a single-channel operational amplifier, please see our dedicated single op-amp modules (such as the AD8610 single module).

Technical Specifications

• Amplifier Type: Dual Precision JFET-Input Operational Amplifier (Two channels in one IC)
• Module Format: SOIC-8 (SO8) pre-mounted on BD970601 adapter to 8-pin DIL (DIP-8)
• Supply Voltage Range: ±5 V to ±13 V (Maximum absolute supply rating: 27.3 V total)
• Gain Bandwidth Product (-3 dB): 25 MHz
• Slew Rate: 50 V/μs
• Voltage Noise Density: 6 nV/√Hz at 1 kHz
• Input Bias Current: 10 pA (maximum)
• Quiescent Current (Iq): 3.5 mA per amplifier (7.0 mA total for the module)
• Settling Time: 600 ns to 0.01%
• Output Swing: Within 1.2 V of supply rails into a 1 kOhm load

For additional details, download the AD8620 data sheet.

Suggested Uses & Applications

• CD / DVD / SACD Player Upgrades: Upgrading stock dual op-amps in I/V (current-to-voltage) conversion and analogue output filter stages.
• DAC Output Buffers: High-performance dual-channel buffering for standalone Digital-to-Analogue Converters.
• Soundcard & Audio Interface Upgrades: Drop-in replacement for socketed dual op-amps on premium PC soundcards and studio gear.
• Pre-amplifiers & Headphone Amplifiers: Precision dual-channel gain stages and line-level driver circuits.
• ADC Input Buffers: Driving Analogue-to-Digital Converter inputs with ultra-low distortion and fast settling time.
• Active Audio Filters: High-speed, low-distortion active crossovers and equaliser networks.

Safety & Operational Warnings (Please Read Before Installation)

• Dual vs Single Pinout Check: Verify that your board layout accepts a standard dual op-amp pinout (Pin 1: Out A, Pin 2: -In A, Pin 3: +In A, Pin 4: V-, Pin 5: +In B, Pin 6: -In B, Pin 7: Out B, Pin 8: V+). Installing a dual module into a single op-amp socket will connect supply rails directly to signal lines, causing severe component damage.
• Strict Voltage Limit (±13 V Max): The AD8620 has a maximum operating supply voltage of ±13 V (26 V total). Do NOT install this module into equipment with ±15 V or ±18 V supply rails (such as circuits designed for standard NE5532, OPA2134, or LM4562 op-amps without reducing supply voltage). Exceeding ±13 V will cause permanent damage to the IC.
• Pin Alignment & Orientation: Verify pin 1 orientation before inserting into the DIP-8 socket. Align the dot or notch on the module with the socket on your circuit board. Reversing the module will destroy the IC upon power-up.
• Power Supply Decoupling: Due to its high bandwidth (25 MHz) and fast slew rate (50 V/μs), adequate power supply decoupling is essential to prevent oscillation. Ensure 0.1 μF ceramic bypass capacitors are installed close to the supply pins.
• ESD Sensitivity: JFET operational amplifiers are sensitive to electrostatic discharge. Handle the module with proper anti-static precautions (e.g. grounded wrist strap or touching a grounded chassis prior to handling).
• Module Appearance: PCB colour, pin plating, or layout printing may vary slightly between production batches, but electrical specifications remain identical.