Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Two-wire Hydrophone Preamplifier

BII-1020 Series  Two-wire Hydrophone Preamplifier

BII-1021/2/3/4 are two-wire wideband preamplifiers working with Plug-in, Phantom and Line Power supply of digital recorders for professional sound recording, and with remote power supplies such as BII-1029 for hydrophone (array or streamer) signal transmission over two-wire cable.
The bandwidth depends on cable-length, and 3.5MHz bandwidth can be achieved with 1m 50Ω coax cable.

BII-1027 is a conventional voltage preamplifier featuring low power low noise, which is based on BII-1021.
BII-1028 is a conventional voltage preamplifier featuring low power low noise, which is based on BII-1022.

BII-1029 is a remote power supply working with BII-1021, BII-1022, BII-1023 and BII-1024.

Features  
Two-wire input, two-wire output
Ultra Low power, wide range of power supply
Wideband, low noise density, low cost, small size
Custom gain, high pass, low pass cut-off frequency
Suggested Application  
Plug-in/Phantom/Line Powering Digital Recording
Remote Powering Preamplifier
Signal Transmission over Two-wire Cable
Two-wire Amplifier of Array or Streamer
Bioacoustic Research, Professional Underwater Sound Recording
Ultrasonic Instrumentation
Related Products: Hydrophone Low Noise, Low Cost and Deep Water.

Specification

Note: R: Fed-through resistor; L: cable length in meters.
Preamplifier  Power
Supply
Supply Voltage
(VDC)
Quiescent
Current (μA)
Gain Maximum
Input (mVpp)
Low Pass
f-3dB (kHz)
BII-1021  Plug-in Power
Phantom Power
Line Powering
Remote Powering
+2.5 to +36@R=220Ω
+2.5 to +36@R=330Ω
+3.0 to +36@R=680Ω
+3.3 to +36@R=1.0kΩ
+4.0 to +36@R=2.2kΩ
+5.0 to +36@R=4.7kΩ
+6.0 to +36@R=6.8kΩ
360 -2.7dB (R=220Ω)
0dB (R=330Ω)
6.2dB (R=680Ω)
10dB (R=1.0kΩ)
17.3dB (R=2.2kΩ)
23.3dB (R=4.7kΩ)
26.6dB (R=6.8kΩ) 
300 3000/L@R=220Ω
2200/L@R=330Ω
1100/L@R=680Ω
1000/L@R=1.0kΩ
450/L@R=2.2kΩ
220/L@R=4.7kΩ
160/L@R=6.8kΩ
BII-1022 Plug-in Power
Phantom Power
Line Powering
Remote Powering
+2.5 to +36@R=220Ω
+3.0 to +36@R=330Ω
+4.0 to +36@R=680Ω
+4.2 to +36@R=1.0kΩ
+5.0 to +36@R=2.2kΩ
+7.5 to +36@R=4.7kΩ
+10.0 to +36@R=6.8kΩ
770 0dB (R=220Ω)
3.4dB (R=330Ω)
9.3dB (R=680Ω)
13dB (R=1.0kΩ)
20dB (R=2.2kΩ)
26.5dB (R=4.7kΩ)
30dB (R=6.8kΩ) 
400 3500/L@R=220Ω
2500/L@R=330Ω
1200/L@R=680Ω
1000/L@R=1.0kΩ
500/L@R=2.2kΩ
200/L@R=4.7kΩ
150/L@R=6.8kΩ
BII-1023 Phantom Power
Remote Powering
+48VDC or P48 780 29.1dB (R=6.8kΩ)  110 150/L
BII-1024 Phantom Power
Remote Powering
+48VDC or P48 380 25.7dB (R=6.8kΩ)   56 160/L
BII-1027 Conventional
Voltage
Amplifier
same to BII-1021 360  Same to BII-1021 300 same to BII-1021
BII-1028 Conventional
Voltage
Amplifier
same to BII-1022 770 same to BII-1022 400 same to BII-1022
BII-1029 DC Power Supply refer to BII-1021/2/3/4 N/A  refer to BII-1021/2/3/4 N/A N/A
Miscellaneous: BII-1020 Series Preamplifier
Input Impedance: 1. Default: 22 MΩ
2. Customized
Input Voltage Noise: 9 nV/√Hz @ 100Hz
5 nV/√Hz @ 1kHz
3 nV/√Hz @ 10kHz
2 nV/√Hz @ 100kHz
Input Current Noise: 1 fA/√Hz @ 1kHz
High Pass Filter: 1. Default: 50Hz
2. Custom, specify when ordering.
Low Pass Filter: 1. Default: see "Low Pass f-3dB (kHz)".
2. Custom, specify when ordering.
Output Impeadnce: 10Ω
Suggested DC Supply: Plug-in, Phantom and Line Power supply of a digital recorder.
+9VDC Battery, Marine Battery, Automobile Battery, Fixed DC Linear Power Supply, Not Included.
DO NOT use variable power supply whose maximum supply voltage is higher than the above rated voltage.
DO NOT use switching mode DC power supply.
Suggested Cable: Coax and shielded two conductor cable. Not included.
Cable Load Drive: Up to 100m, Frequency Dependent, refer to "-3dB Bandwidth".
Package: 1. Default: Coated PCB with 3cm wires and wire leads.
2. Customized Potted Unit with 0.15m RG174/u coax and BNC male, specify when ordering.
Size: Coated PCB: LxWxH = 20x8.9x5mm
Potted Unit: ΦDxL=33x15mm
Weight:  1.5g
Operating Temperature: -40°C to 85°C
Storage Temperature: -50°C to 105°C
BII-1020 Wiring:  Click BII-1020 wiring for wiring information in detail.

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