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New InvenSense IMU-on-a-chip

Posted by Mitch on May 29, 2009 at 12:30am

Press Release"The world's first 6-axis MEMS-based motion processing solution delivering the smallest, most robust inertial measurement unit (IMU) for CE applications. This solution includes two 4x5x1.2 mm packages for the gyroscopes and one 3x3x0.9 mm package for the accelerometer, providing a small 7x7mm equivalent footprint with 10,000 g-shock rating"Looks great! It says world's first, but i swear there was already an Analog Devices onearound , but very pricey... Anyway, I cant wait to see this in a RC plane. Good to see prices falling.I wonder if this was what was used in the IMUDot we saw earlier?

6dof, imu, invensense

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Comments

Angelo December 15, 2009 at 6:09am

Speaking of Jeff Han: Jeff pointed me to this new device, recently announced by Analog Device. Many people were anxiously waiting for something like this to appear: single chip that contains 3 accelerometers and 3 gyroscopes that can be used to build a full, 6 degree of freedom inertial measerument unit (IMU).
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Noth666 June 2, 2009 at 9:27am

Interesting stuff, I am working on a IDG-500 plus ISZ-500 plus freescale mma7361 IMU - looks like this might be an interesting digital variant of that. Having issues finding the ISZ-500 tho...
From the block diagram the ADC is included into the accelero wich seems like a bit of an odd solution to me, why not make the gyros digital already?
Jack Crossfire May 29, 2009 at 5:07pm

It's an "IMU on a chip" but it's really 3 chips. It's "new" but 3 chip IMU's have been around since 2006.
3D Robotics

Chris Anderson May 29, 2009 at 2:35pm

Peter,

That's good news. Many thanks for the info!
Developer

Pete Hollands May 29, 2009 at 2:27pm

@Chris - After your question regarding whether a daughter board is required I wrote to Invensense. No daughter board is required. All 3 chips mount directly and horizontally onto the PCB. Here is the answer from one of their technical people:-

Hi Peter,

Yes, that is the intent of the ISZ family of gyros. This will sense the
rotation of the application around the normal axis to the plane of the PCB
in which the ISZ is mounted. Mounting an ISZ and IDG on the same PCB will
allow for 3 axis of angular rate sensing. No daughter card mounded
perpendicularly will be needed with ISZ.

Please let me know if you have any other questions.

Thank You,

Benjamin Kokes
Field Applications Engineer.
Todd Berk May 29, 2009 at 11:08am

Hmm... Apparently I2C / SPI can read analog voltages since the accelerometers don't seem to be connected to ADC's like the external gyros in their block diagram.
Jack Crossfire May 29, 2009 at 10:31am

They planned on a 3 axis gyro in a chip 2 years ago. Now they're trying to sell you an IDG + ISZ combination as the world's first 3D solution. Even with inflation, they're still more expensive than a bag full of LISY300AL's. They're right about having the world's smallest 3 axis solution.
Greg Gibbons May 29, 2009 at 7:16am

Even better all 3 chips mount horizontally.
3D Robotics

Chris Anderson May 29, 2009 at 7:06am

Whoops--sorry. I meant the XY. That's vertical, yes?
T3

William Premerlani May 29, 2009 at 6:48am

The Z axis gyro mounts horizontally.