HIGH PERFORMANCEINERTIAL MEASUREMENT UNIT
STIM377H

PRODUCT BRIEF

 Small size, low weight and low cost
 Hermetic package without paint and separate label
 ITAR free
 Insensitive to magnetic fields
 0.3 °/h gyro bias instability
 0.15 °/√h angular random walk
 ±400 °/s angular rate input range
 10 °/h gyro bias error over temperature gradients 0.05 mg accelerometer bias instability
 ±10 g acceleration input range (optional ranges available)(39 mm x 45 mm x 22 mm)

 3 inclinometers for accurate levelling Backwards compatible with STIM300
STIM377H is a tactical grade 3-axis
inertial measurement unit (IMU) comprisedof 3 highly accurate MEMS gyros, 3 highstability accelerometers and 3inclinometers. It is based on the wellestablished STIM300, the STIM377H isassembled in a cleanroom and thealuminum enclosure has a glass-to-metal
sealed electrical micro-d connector and alaser welded lid to secure long termhermetic operation. All parts are tested forfine and gross leak to conform to MIL-STD883J, Class H. The STIM377H enclosureis also free of paint and the label issupplied separately.
The IMU is factory calibrated andcompensated for temperature effects overthe full operating temperature range.
Sensonor's proven gyro sensor technology
has been in production for more than twodecades. It performs exceptionally wellacross many applications due to its very
low vibration and shock sensitivity. The
gyro is qualified according to highperformance aircraft vibration standard.
Range and features
STIM377H full-scale angular rate input
range is ±400 °/s and the output is capped
at ±480 °/s. Standard acceleration input
range is ±10 g. Axis misalignment of 1
mrad is achieved by electronic axisalignment. STIM377H requires asingle 5 V power supply and has a digital
serial RS422 interface.

STIM377H offers several user selectable
output formats and sample rates for gyro
and accelerometer data: Angular Rate Incremental Angle Average Angular Rate Integrated Angle Acceleration
 Integrated Velocity

Evaluation tools
STIM377H evaluation tools supporting PCIor USB connectivity are available. Theevaluation tools offer easy access tomeasurement data and configuration of theIMU. It supports data sampling atalternative rates, graphical presentation,and data logging to file. The evaluation
tools contain a RS422 interface for USB orPCI hardware setup, all necessary cabling,
and PC software.

 Incremental Velocity

Application areas Average Acceleration

STIM377H is a good fit for satellite attitude& orbit control systems (AOCS)
and launchers. Other applications arestabilization, guidance and navigation
applications in Industrial, Aerospace andDefence markets. The design is field
proven in Military Land Navigators, Missilesystems, Target acquisition systems,
Airborne surveillance, DIRCM, RemoteWeapon Systems, Launch vehicles andSatellites.

Device configurations and selfdiagnostics
A reliable RISC ARM microcontroller
enables easy device configuration andprogramming. The user can set output unit
format, sample frequency and datagram
content, LP filter cut-off frequency, RS422
transmission bit rate and line termination.
STIM377H is continuously monitoring its
internal status and track more than 100
parameters that the user can access. Thisincludes monitoring of:Internal references
Sensors for error and overload
Internal temperatures
RAM and flash
Supply voltage

In many applications, STIM377H cancompetitively replace IMUs based on Fiber
Optic Gyros (FOGs) and improve system
performance with respect to robustness,reliability, size, weight, power and cost.

PRODUCT BRIEF STIM377H

Parameter

Min

NomMaxUnit

ELECTRICAL CONNECTIONSGENERAL
Weight55

Operating temperature-40

Supply voltage

4.5

Power consumption

g
85°C

5.0

5.5

V

1.5

2W

1sSPS

Start-up time
Sample rate

2000

Mechanical shock, any direction

1500g

RS422 transmission bit rate

5.18Mbit/s

Misalignment

1(TRANSMIT ONLY)

mrad

GYRO
Input range±400°/s

Non-linearity (condition: ±200 °/s)

15

ppm

Resolution

0.22°/hBias instability

0.3°/hAngular random walk

0.15

°/√h

Bias error over temperature gradients±10 1)°/h rms

Linear acceleration effectBias1 2)°/h/g

Scale factor

50 2)

ppm/g

Scale factor accuracy±500ppm(FULL FUNCTION)ACCELEROMETER
Input range±10 3)g

Resolution

1.9µg

Bias instability

0.05

mg

Velocity random walk

0.07m/s/√h1)

mg rmsBias error over temperature gradients±2

Scale factor accuracy±300

FUNCTIONAL BLOCK DIAGRAM

ppm

INCLINOMETER
Input range±1.7gResolution

0.2µg

Scale factor accuracy
1) Condition: ΔT ≤ 1°C/min
2) With g-compensation±500ppm3) Optional ranges: ±5 g and ±30 g

MECHANICAL DIMENSIONSAll dimensions in mm. Volume < 2,0 cu. in (33 cm3)

X-AXISGYRO

GYRO DRIVE+ ADC + LPF

Y-AXISGYRO

GYRO DRIVE+ ADC + LPF

Z-AXISGYRO

GYRO DRIVE+ ADC + LPF

X-AXISACC.

ADC + LPF

Y-AXISACC.

ADC + LPF

Z-AXISACC.

ADC + LPF

X-AXISINCL.

ADC + LPF

Y-AXISINCL.

ADC + LPF

Z-AXISINCL.

ADC + LPF

AUX+AUX-

ADC + LPF

RS422
OUTPUT
DRIVER

TxData+RS422
INPUT
BUFFER

RxData+SYSTEMCONTROLLER

TxData-RxDataExtTrig
TOVReset

SELFDIAGNOSTICS

POWER
MANAGEMENT /VOLTAGE AND
FREQUENCY
REFERENCES

+5V
GND

AXIS DEFINITIONS

9 TxD+
10 RxD+
11 ExtTrig
12 GND
13 GND
14 AUX+
15 GNDPINOUTCALIBRATIONANDCOMPENSATION

Information furnished by Sensonor is believed to be accurate and reliable. However, no responsibility is assumed by Sensonor for its use, nor for any infringements of patents or other rights of third parties that may
result from its use. Sensonor reserves the right to make changes without further notice to any products herein. Sensonor makes no warranty, representation or guarantee regarding the suitability of its products forany particular purpose, nor does Sensonor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential orincidental damages. No license is granted by implication or otherwise under any patent or patent rights of Sensonor . Trademarks and registered trademarks are the property of their respective owners. Sensonor
products are not intended for any application in which the failure of the Sensonor product could create a situation where personal injury or death may occur. Should Buyer purchase or use Sensonor Technologies
products for any such unintended or unauthorized application, Buyer shall indemnify and hold Sensonor Technologies and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims,costs, damages, and expenses, and reasonable legal fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges thatSensonor Technologies was negligent regarding the design or manufacture of the part.

Ed. 2020-09

8 VSUP
7 AUX6 AUX_GND
5 NRST
4 TOV
3 TST
2 RxD1 TxD-Sensonor AS • Horten, Norway • sales@sensonor.com • www.sensonor.com