Benthowave Instrument Inc.

BENTHOWAVE INSTRUMENT INC. Acoustic Transducer & System 

Linear Power Amplifier for Sonar Transducer / Projector

Linear Power Amplifier for Sonar TransducerBII-5020 Series Wide Power Bandwidth, 62W

Suggested Application

  • Sub-bottom Investigation
  • Seafloor-mapping System
  • Image Sonar
  • Underwater Sound Velocimeter / Sound Velocity Probe
  • Short Range Navigation, Inspection and Survey
  • Transmitting Array Shading
  • Object Detection and Tracking
  • Distance Gage
  • Navigation, Obstacle Avoidance
  • Underwater Wireless Communication / Modem
    FSK, PSK and Spread Spectrum System
    High Speed/Frequency Short Range Communication
    Low Frequency Long Range Communication
  • Phantom Echo Generation
  • Phantom Generation of Clicks, Whistles and Pulse Trains
  • Audiogram Studies / Audiometry
  • Psychoacoustic and AEP/ABR Experiments on Aquatic Mammals
  • Bioacoustic and Biological Research on Whales and Dolphins
Source Level Capability: 187.1 +DI (dB re µPa)
Bandwidth: 500kHz
Fixed 29.25dB Gain
Small Size Fitting in ΦD1½" (38.1mm) Cylinder Housing
Manual and Computer Digital Output Control
Single DC Power Supply, Stand-by Low Power Mode
Related Products  
BII-6000 Impedance Matching and Tuning
BII-4000 Signal Generation
Underwater Transducer SONAR, HIFU...
BII-2100 Transmitting & Receiving Switch


Linear Power Amplifier BII-5021 BII-5022
Application: Pulse/Burst SINE, Chirp/FM, Arbitrary Waveform
Spread Spectrum FSK and PSK Signals
Marine Animal Sound
Whale and Dolphin's Clicks, Whistles and Pulse Trains
Pulsed Sonar Signal ONLY, Duty Cycle ≤ 10%
Shut-down Control: On-board ON/OFF Switch: Manually or Digitally. Digital Output
Size:  Round PCB
ΦDxH=101.6x50.8 mm
Rectangular PCB
Mounting:  4xΦD4.87mm through-holes 4xΦD3.2mm through-holes
Weight in Air:  180 grams  70 grams 
Cable:  6" or 0.15m wires 60mm wires
Connector:  Wire Leads Wire Leads
Miscellaneous: BII-5020 Series Power Amplifier
Gain: 29.25 dB or 29
Power Bandwidth (-3 dB): 100 kHz @ +36 VDC
200 kHz @ +24 VDC
500 kHz @ +12 VDC
See Graph of SPL vs Frequency
RMS Power: 62 W @ +36 VDC
38 W @ +24 VDC
21 W @ +12 VDC
Maximum Input Level: 2 Vpp
Input Impedance: 200 KΩ || 7pF
Supply Voltage: +8 to +36 VDC
Suggested DC Supply: 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.
Quiescent Current: Active: 36 mA; Shutdown: 16 mA
Shutdown Control Voltage: TTL/CMOS Compatible. Logic Low "0": ≤ 0.8V; Logic High "1": 2.4V to Supply Voltage Level.
Logic High: Output enabled; Logic Low: Output Disabled.
Max. Output Current: 5 A
Operating Temperature: -40°C to 85 °C
Storage Temperature: -50°C to 105 °C
Technical Documents: Download BII-5020 Data Sheet (round PCB).

PCB Size and Mounting Information

Power Amplifier for Sonar TransducerPower Amplifier for Sonar Transducer 

BII-5022 Wiring

Linear Power Amplifier

  Signal Wires' Colour
IN+ Input Signal White
IN- Input Signal common Blue
COM Power Supply Common Black
+Vs Power Supply Positive Voltage Red
OUT- Negative Output Yellow
OUT+ Positive Output Blue
OUT COM Output Common Default: PCB Via Pad, BII does not solder wire.
ST-BY Shut Down Control Default: PCB Via Pad, BII does not solder wire.
ST-BY COM Shut Down Control Common Default: PCB Via Pad, BII does not solder wire.
SD Shut-down pin Default: PCB Via Pad, BII does not solder wire.
SW Shut-down pin Default: SW is wired to OFF
OFF Shut-down OFF pin Default: OFF is wired to SW
Default Factory-set: SW is wired to OFF, shut-down function is not available.
To use shut-down function:
1. Cut off the wire between SW and OFF, solder a wire from SW to SD.
2. Solder wires to ST-BY and ST-BY COM respectively.

BII-5020 Series: Typical SPL (Sound Pressure Level) vs Frequency

Frequency (kHz) SPL (dB µPa*m) DUT (Device under Test)
3.5 to 300 185.7 to 187.1 Omnidirectional Transducer
3.5 186.6 to 188.1 6" Planar Transducer
12 191.5 to 193.0 6" Planar Transducer
24 197.5 to 199.0 6" Planar Transducer
38 200.0 to 201.5 5" Planar Transducer
50 202.3 to 203.8 5" Planar Transducer
70 203.4 to 204.9 4" Planar Transducer
100 206.5 to 208.0 4" Planar Transducer
120 205.5 to 207.0 3" Planar Transducer
150 207.4 to 208.9 3" Planar Transducer
200 209.9 to 211.4 3" Planar Transducer
300 214.6 to 216.1 3" Planar Transducer
420 212.9 to 214.4 2" Planar Transducer

BII-5020 Series Frequency Response 
Linear Power Amplifier

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