TRANSIMPEDANCE FOUR CHANNELS AMPLIFER

Four-channel transimpedance amplifiers convert current signals into voltage signals with precision and low noise for current-output devices including photodiodes and sensors. These devices deliver accurate signal measurement across diverse technical applications, from optical power monitoring to radiation detection and industrial sensing.

– Technical Specifications

Three distinct architectures address different performance requirements:

Analog Devices LTC6561 operates at 220 MHz bandwidth with 74 kΩ transimpedance gain and linear input current range of 0 µA to 30 µA. Input current noise density measures 4.5 pA/√Hz at 200 MHz. Single 5 V supply operation consumes 200 mW across all channels. Input capacitance is 2 pF. Output swings 2 V peak-to-peak into 100 Ω load. Overload recovery completes in 12 ns at 1 mA; channel switchover occurs in <50 ns. Integrated 4-to-1 output multiplexer enables cascading for 8, 12, 16, 24, or 32 channels. AEC-Q100 qualified. Package: 4 mm × 4 mm QFN-24.

Koheron TIA400 delivers 2 MHz bandwidth with input-referred current noise of 5 pA/√Hz. Supports photodiodes up to 200 pF input capacitance. Input current range reaches ±4 mA. Selectable transimpedance gains: 2 kV/A or 10 kV/A. Output impedance is 50 Ω with voltage range –2 V to 2 V on 50 Ω load. Dual supply: +11.5 V to +13 V and –13 V to –11.5 V. Supply current per rail: 320 mA. Dimensions: 79 mm × 66 mm × 13 mm; weight 36 g. Operating temperature: 0°C to 50°C.

MAZeT MTI04CS/CQ provides programmable gains from 25 kΩ to 20 MΩ transimpedance across eight selectable levels, with current ranges 25 nA to 20 µA. Frequency response spans 6 Hz to 300 kHz. Digital compensation adapts to input capacitance at 5 pF and 80 pF stages. Simultaneous gain programming across all channels. Power-down mode available.

– Key Features

• Multi-gain architectures for low-noise nanoampere measurement through high-current applications
• Fast transient recovery and channel switching for real-time multiplexed readout
• Cascadable designs enable extended channel counts
• Input capacitance compensation for diverse sensor types

– Typical Applications

• Optical power monitoring and photodiode readout
• Radiation detection
• UV, visible, NIR, and IR spectroscopy arrays
• Industrial sensor interfaces
• Surface analysis instrumentation

– Compatibility & Integration

Cascading multiple devices supports modular system expansion. Automotive-grade options available. Compact packages enable dense board-level integration.