1775 IMU

17751 IMU1775 app_2
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1775 IMU

Inertial Solutions in Autonomous Ground Reference Systems

Premium performance for the most demanding environments and applications
Offering superior performance in a commercial-off-the-shelf inertial measurement unit, the 1775 IMU is the premiere IMU offered by KVH, now available with either 10g or 25g accelerometers. An advanced inertial sensor system, the 1775 IMU is designed to meet the demands of systems requiring very high performance in extremely challenging environments. Joining the KVH family of high performance IMUs, the 1775 IMU leverages the proven technology of the DSP-1750 and DSP-1760 fiber optic gyros (FOGs), the world’s smallest high performance FOGs. These FOGs are then integrated with low noise accelerometers as well as 3 axes of magnetometers in the 1775 IMU to provide higher accuracy levels and magnetic field compensation. The high performing 1775 IMU is designed for systems and applications where very high bandwidth, low latency and low drift are critical.

Compact design for ease of integration
Weighing .07 kg (1.5 lbs.), the 1775 IMU is a compact design that is a drop-in replacement for many available IMUs. The flexible interface and programmable message outputs simplify the integration of the 1775 IMU. The 1775 IMU offers ease of integration for designers of higher level inertial navigation, guidance or stabilization systems by offering user-programmable features including an adjustable baud rate so that communication latency can be adjusted to receive accurate data even faster. The 1775 IMU features an RS-422 asynchronous, full differential interface with user-programmable update rates from 1 to 5000 Hz. The robust design of the 1775 IMU ensures reliable and highly accurate performance, while KVH’s proven fiber optic technology and solid state design provide long life and dependable, consistent operation. The 1775 IMU is KVH’s premiere inertial measurement unit, developed specifically to meet the needs of the most challenging applications and operating environments.

Low latency, very high bandwidth for critical applications
Ideal applications for the 1775 IMU include those with challenging environments such as drilling, mining, pipeline inspection and maintenance, mobile mapping systems, and stabilization systems for radar, LIDAR and high-speed gimbals. With its 3-axis magnetometer, the 1775 IMU is the ideal choice for applications designed for environments requiring magnetic field compensation.

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Performance Fiber Optic Gyro

Fiber Optic Gyros


Input Rate (maximum)


Bias Instability (25°C)

≤0.1°/hr, 1σ (max)
≤0.05°/hr, 1σ (typical)

Bias vs. Temp (≤ 1 °C/min)

≤1°/hr, 1σ (max)
≤0.7°/hr, 1σ (typical)

Scale Factor Non-Linearity (max rate, 25°C)

≤50 ppm, 1σ

Scale Factor vs. Temp. (≤ 1 °C/min)

≤100 ppm, 1σ

Angle Random Walk (25°C)


Bandwidth (-3dB)

≥1000 Hz

Technology - Accelerometers
MEMS Silicon
Input Limit (maximum)

±10 g
±25 g

Bias Instability (constant temp)

≤0.05 mg, 1σ

Scale Factor Temperature Sensitivity

≤500 ppm, 1σ (max)
(full scale, full temp)

Velocity Random Walk (25°C)

(0.23 ft/sec/√hr)

Bandwidth (-3dB)*

±10 g: ≥200 Hz

±25 g: ≥450 Hz

Initialization Time (valid data)

≤1.5 secs

Data Interface

RS-422, Asynchronous,
Full Differential

Baud Rate

Selectable 9.6 Kbps to 4147 Kbps

Data Rate

User selectable 1 to 5000 Hz

Dimensions (max)

88.9 mm Dia. x 73.7mm H
(3.5" x 2.9")

Weight, max

0.7 kg (1.5 lbs.)

Power Consumption, max (typical)

8 W (max),
5 W (typical)

Input Voltage

+9 to +36 VDC

Temperature: Operating

-40°C to +75°C
(-40°F to +167°F)

Shock: Operating

±10 g: 9 g, 11 msec, sawtooth

±25 g: 25 g, 11 msec, sawtooth

Vibration: Operating

±10 g: 8 g rms, 20-2000 Hz

±25 g: 15 g rms, 20-2000 Hz

Input Range
±10 Gauss (max)

<0.2 Gauss

Bias Noise (ms)

<2 mGauss

*Based on Accelerometer manufacturer specifications, verified during test

Brochures & Datasheets

Document File Info
DATASHEET - 1775 IMU PDF file 778 KB / 2 pg

Additional Documents, Forms & Pricing

White PapersFile Info
High Accuracy Multi-Sensor Navigation Solutions for Overcoming GNSS in Unmanned and Autonomous Systems - 3rd Edition - This paper discusses how the combination of high performance KVH inertial measurement units integrated with GNSS results in extremely precise inertial navigation solutions that overcome numerous GNSS vulnerabilities. PDF file 1.5 MB / 7 pg



Strong magnetic fields have the ability to cause apparent drift in the gyro bias. This is due to the Faraday effect on the laser light in the sensing coil resulting in non-reciprocal light paths. While this effect can be observed in gyros designed for precision inertial navigation systems (drift rates of less than 1 degree per hour), and can be mitigated by the use of mu-metal shielding, there have been no reported problems with KVH FOGs. If your application results in mounting a FOG near a very strong magnetic field (>50 gauss), a practical test to determine sensitivity is suggested.


  • Extremely high bandwidth (≥1000 Hz)
  • User-programmable data  rates from 1 to 5000 Hz
  • User-configurable baud rate from 9.6 Kbps to 4147 Kbps
  • Asynchronous RS-422 protocol, full differential
  • 3-axis magnetometer for magnetic field compensation
  • Compact and lightweight - <0.7 kg (1.5 lbs.)

Featured Options

  • Adjustable baud rate to minimize communication latency, and receive accurate data even faster
  • FOG/IMU Developer’s Kit with easy-to-use software accelerates your IMU and FOG integration, development, and interface efforts. Learn more.

Exclusive Technology

  • E•Core Technology
    KVH’s breakthrough proprietary polarization maintaining E•Core ThinFiber enables high performance in much smaller gyros and inertial systems, such as the 1725 and 1750 IMU, and the DSP-1750 and 1760 Fiber Optic Gyros (FOGs). By minimizing the overall diameter of KVH’s standard E•Core fiber, the resulting ThinFiber significantly and reliably boosts the accuracy of all KVH gyros, and allows the production of very small FOGs with very high bandwidth and very low noise.
  • DSP Technology
    KVH’s Digital Signal Processing (DSP) electronics improve fiber optic gyro performance in critical areas including scale factor and bias vs. temperature, scale factor linearity, and maximum input rate. KVH’s exclusive DSP design is protected by multiple patents, and overcomes the limitations of analog signal processing which eliminates temperature-sensitive drift and rotation errors.

White Papers & Case Studies

  • Learn more! Download and read our white papers for more details about KVH's fiber optic gyro technology.*

* To access these white papers, you will be required to provide us with your contact information.

Watch the Video

1775 IMU: Choosing the Right FOG to Meet Your Needs


* To access these manuals, you will be required to provide us with your contact information.

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