E989-05

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Product Specifications: E989-05 – PMT Voltage Divider Circuit

Category	Specification	Details / Notes
General Model Info	Product Code	E989-05
	Product Type	High-Speed / Active Voltage Divider Circuit
	Manufacturer	Hamamatsu Photonics
	Primary Use	Ultra-fast timing applications requiring minimal pulse rise time and low time jitter.
Compatibility	Intended PMT Type	Fast PMTs (e.g., R9800, R10408U series)
	Socket Type	8 to 10-stage PMT with standard pin arrangement.
Electrical	Input Voltage (V~in~)	+900 V to +1500 V DC (Positive polarity)
	Output Signal	Amplified, Negative pulse
	Output Connector	BNC connector
	Divider Type	Low-inductance, thin-film resistor network.
	Special Circuitry	Integrated fast amplifier (e.g., a video amplifier stage).
	Polarity	Anode Grounded / Cathode at High Voltage
	Output Impedance	50 Ω (Matched for high-frequency transmission)
Performance	Rise Time	< 1 ns (Extremely Fast, including PMT contribution)
	Bandwidth	> 350 MHz
	Gain (of amplifier)	Typically 10x
	Transit Time Spread (TTS)	Minimized by the fast output stage.
	Maximum Average Anode Current	10 μA (Lower due to focus on speed, not power handling)
Mechanical	Housing Material	Metal (for shielding and grounding)
	PMT Socket	Integrated, with low-inductance contacts.
	High Voltage Input	SHV connector (Standard High Voltage)
	Signal Output	BNC connector (50 Ω)
	Dimensions	Similar to other E989 bases, but with metal casing.
	Shielding	Full metal housing for EMI/RFI protection.
Environmental	Operating Temperature	0 °C to +50 °C
	Storage Temperature	-20 °C to +60 °C
	Humidity	Non-condensing