Direct Sales Transimpedance Amplifier QSFP

QSFP-compatible transimpedance amplifiers (TIAs) are available from multiple vendors, offering high-speed, low-power, multi-channel solutions for 100G to 400G optical transceivers.

Key Products and Features

fJscaler Inc. offers high-frequency, low-power linear TIAs optimized for QSFP-DD and OSFP form factors. Their FJS1001 is a dual-channel, 64GBd differential linear TIA with a variable gain amplifier (VGA) and output buffer, featuring independent channel control and low 495mW power dissipation, suitable for short-reach optical interconnects and silicon photonics applications . Credo Technology provides the Teal 200, a quad-channel 4 × 50Gbps TIA for QSFP56, QSFP-DD, and OSFP modules. It supports 200Gbps SR4/DR4/FR4 and 400Gbps SR8/DR8/FR8 applications using 50Gbps PAM-4 modulation, with backward compatibility for 4 × 25Gbps NRZ operation. The Teal 200 emphasizes low power dissipation, making it ideal for AI and hyperscale data center deployments . Texas Instruments (TI) offers a broad portfolio of high-bandwidth TIAs with variable gain, fast recovery, internal input protection, and fully differential outputs. TIAs are available in integrated multi-channel configurations or individual high-bandwidth amplifiers optimized for optical networking, LIDAR, and time-of-flight systems, supporting 1G to 100G optical modules . Mouser Electronics distributes TIAs from leading manufacturers including Analog Devices and TI, providing datasheets, pricing, and inventory for direct purchase .

QSFP Compatibility

TIAs for QSFP modules are designed to integrate with QSFP, QSFP+, QSFP28, QSFP56, QSFP-DD, and OSFP form factors. These amplifiers support high-speed data transfer from 10Gbps up to 112Gbps per channel, enabling aggregate rates up to 400Gbps per port. They are suitable for short-reach optical interconnects, high-density switch designs, and low-latency fiber optic links .

Considerations for Selection

• Data Rate and Modulation: Ensure the TIA supports the required NRZ or PAM-4 modulation and channel speed.
• Power Dissipation: Low-power TIAs reduce thermal load in QSFP modules, critical for dense data center environments.
• Channel Count: Dual or quad-channel TIAs allow multi-lane QSFP operation.
• Form Factor Compatibility: Verify QSFP-DD, OSFP, or QSFP56 compatibility for seamless integration.
• Control Features: Variable gain and independent channel control improve signal integrity and calibration flexibility. These TIAs are widely used in high-speed optical transceivers, active optical cables (AOCs), and silicon photonics modules, providing reliable, low-latency performance for modern data center and AI/ML networking applications.