The Newport/Oriel 70710 Current Preamplifier is a low-noise transimpedance converter that transforms low-level current signals into voltage outputs. Engineered for photomultiplier tubes and photodiodes operating in photovoltaic mode, this instrument delivers signal conversion across a DC to 100 kHz bandwidth with selectable gain settings spanning six decades.
Technical Specifications
• Transimpedance Gain: 10⁴, 10⁵, 10⁶, 10⁷, 10⁸, and 10⁹ V/A (user-selectable)
• Bandwidth: DC to 100 kHz
• Maximum Output Voltage: ±10 V
• Input Impedance: Up to 8000 Ω (at 10⁹ V/A gain)
• Accuracy: ±1 %
• AC Linearity: ±1 %
• Input/Output Connectors: BNC
• Current Noise: Less than 2.3 × 10⁻¹² A/√Hz (at 1 kHz, 10⁶ V/A)
• Noise Equivalent Power: 4 pA/√Hz (at 1 kHz, 10⁴ V/A)
– Key Features
• Six-decade gain range accommodates sub-picoampere to nanoampere signal levels
• Low-noise operation enables detection of extremely weak optical signals
• Wide bandwidth supports both DC and AC measurement modes
• Precision accuracy and linearity specifications for quantitative measurements
– Typical Applications
• Photomultiplier tube readout and signal conditioning
• Photodiode transimpedance amplification in photovoltaic detection circuits
• Low-light optical measurement systems requiring signal conditioning
• Lock-in amplifier and power meter signal chain integration
– Compatibility & Integration
Recommended for use with unamplified detectors including the Newport/Oriel 71650 and 71653, and compatible with PMT, InGaAs, and silicon detector models. Output connects directly to Newport power meters via BNC cable (model 70018) or through adapter model 71686 for DC meter integration. Power operation requires external ±13 VDC to ±18 VDC supply at 10 mA; the Oriel Laboratory Power Supply models 70703 or 70709 are recommended.
Weight: 0.1 kg.
