High Speed Current Amplifiers (Transimpedance Amplifiers) HCA-400M-5k

Features

• Bandwidth: DC–400MHz
• Rise/Fall Time: 1.0ns
• Gain: 5×10³ V/A (@50Ω load)
• Low pulse distortion

Applications

• Photodetector preamplification
• Spectral analysis systems
• Electronic measurement
• Ion detection equipment

Specifications

Test Condition: Vs=±12V, Ta=25℃

Item	Parameters
Gain
Transimpedance Gain	5×10³ V/A (@50Ω load)
Gain Accuracy	±3%
Frequency Response
Lower Frequency Limit	DC
Upper Frequency Limit	400MHz (±10%, @Source Capacitance 2–4pF)
Maximum Signal Source Capacitance	10pF (including RF cable parasitic capacitance)
Rise/Fall Time (10–90%)	1.0ns (@Source Capacitance 2–4pF)
Rise/Fall Time (10–90%)	1.3ns (@Source Capacitance 5–10pF)
Input
Input Noise Current	15pA/√Hz (@100MHz)
Input Noise Voltage	2.5nV/√Hz (@100MHz)
Input Current Range	±200μA
Input Offset Voltage	<2mV
Input Impedance	50Ω // 5pF
Output
Maximum Output Voltage Range	±1.0V (@50Ω load)
Output Impedance	50Ω
Bias Output
Bias Output Range	±12V, adjustable by potentiometer
Bias Output Impedance	10kΩ // 1μF
Power Supply
Voltage	±12V
Current	±100mA, typical
Housing
Weight	126g
Material	6061 Aluminum Alloy
Temperature
Storage Temperature	-40…+85℃
Operating Temperature	-20…+60℃
Absolute Maximum Ratings
Input Voltage	±5V
Supply Voltage	±20V
Connectors
Input	BNC Female
Output	BNC Female
Power Connector	M8 3‑pin Female Connector1=Brown(+12V)2=Black(GND)3=Blue(-12V)

Application Diagram

Typical Characteristics

Noise Spectrum

Note: Spectrum noise data is measured at the amplifier output with the input open but shielded. To determine the spectral input noise, divide the measured output noise by the amplifier gain 5 x 10³ V/A

Pulse Response (16 averages)

Large Signal Response

10MHz, 200μA peak-to-peak square wave input (4 averages)

Small Signal Response

1MHz, 2.4μA peak-to-peak square wave input (upper: no average; lower: 64 averages)

Dimension Drawing

Delivery List