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ITG-3050

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10 ENVIRONMENTAL COMPLIANCE ...................................................................................................... 42

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1.2 Purpose and Scope

This document is a product specification, providing a description, specifications, and design related

information for the ITG-3050™.

3050’s FIFO and then go into a low-power sleep mode while the device collects more data.

The ITG-3050 features a 3-axis digital gyro with programmable full-scale ranges of ±250, ±500, ±1000, and

±2000 degrees/sec (dps or °/sec), which is useful for precision tracking of both fast and slow motions. Rate

noise performance sets the industry standard at 0.01 dps/√Hz, providing the highest-quality user experience

in pointing, gaming, user interface, and other motion-based applications. Factory-calibrated initial sensitivity

reduces production-line calibration requirements.

Other industry-leading features include on-chip 16-bit ADCs, programmable digital filters, a precision clock

with 1% drift from -40°C to 85°C, an embedded temperature sensor, programmable interrupts, and a low

performance, lowest noise, and the lowest cost semiconductor packaging to address a wide range of

handheld consumer electronic devices. The device provides the highest robustness by supporting 10,000g

shock in operation. The highest cross-axis isolation is achieved by design from its single silicon integration.

1.4 Software Solutions

This section describes the MotionApps™ software solutions included with the InvenSense MPU™ (Motion

Processing Unit™) and IMU (Inertial Measurement Unit) product families.

Please note that the products within the IDG, IXZ, and ITG gyroscope families do not include these

software solutions. The MPU and IMU product families are pin compatible with the digital IDG, IXZ, and

ITG families, and provide a simple swap and replace upgrade path to integrate InvenSense’s software

The MotionApps Platform provides a turn-key solution for developers and accelerates time-to-market. It

consists of complex 6/9-axis sensor fusion algorithms, robust multi-sensor calibration, a proven software

architecture for Android and other leading operating systems, and a flexible power management scheme.

The MotionApps Platform is integrated within the middleware of the target OS (the sensor framework), and

also provides a kernel device driver to interface with the physical device. This directly benefits application

developers by providing a cohesive set of APIs and a well-defined sensor data path in the user-space.

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saving power by letting the processor burst read the FIFO data, and then go into a low-power

sleep mode while the ITG-3050 collects more data.

 1MHz clock output to synchronize with digital 3-axis accelerometer

 MEMS structure hermetically sealed and bonded at wafer level

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Notes:

1. Tested in production

2. Based on characterization of 30 parts over temperature on evaluation board or in socket

3. Based on design, through modeling, and simulation across PVT

4. Typical. Randomly selected part measured at room temperature on evaluation board or in socket

5. Based on characterization of 5 parts over temperature

The ITG-3050 has a primary I2C serial primary interface. ITG-3050 always acts as a slave when

There are two options for connecting a 3rd party accelerometer to the system comprised of the ITG-3050 and

For further information regarding I2C Master Mode and Pass-Through Mode, please refer to Section 5.5.

5.6.2 3rd Party Accelerometer Connected to ITG-3050 Primary I2C Interface

The diagram below shows the accelerometer connected to the Primary I2C Bus of the ITG-3050. In this

configuration, the applications processor can directly address the accelerometer via the I2C bus. However,

an upgrade to the MPU-3000 or IMU-3000 family of products will require a new board layout.

The ITG-3050 has a flexible clocking scheme, allowing for a variety of internal or external clock sources for

the internal synchronous circuitry. This synchronous circuitry includes the signal conditioning and ADCs,

various control circuits, and registers. An on-chip PLL provides flexibility in the allowable inputs for

generating this clock.

Allowable internal sources for generating the internal clock are:

 An internal relaxation oscillator

sources and the requirements for power consumption and clock accuracy. Most likely, these requirements

will vary by mode of operation. For example, in a mode where the gyros are active, selecting the gyros as

the clock source provides for a more-accurate clock source.

There are also start-up conditions to consider. When the ITG-3050 first starts up, the device operates off of

its internal clock, until programmed to operate from another source. This allows the user, for example, to

wait for the MEMS oscillators to stabilize before they are selected as the clock source.

5.8 Clock Output

In addition, the ITG-3050 provides a clock output, which allows the device to operate synchronously with an

external digital 3-axis accelerometer. Operating synchronously provides for higher-quality data, since the

sampling instant for the sensor data can be set to be coincident for all sensors.

configuration register determines what data goes into it, with possible choices being gyro data,

accelerometer data, temperature readings, and FSYNC input. A FIFO counter keeps track of how many

bytes of valid data are contained in the FIFO. The FIFO register supports burst reads. The interrupt function

may be used to determine when new data is available.

5.11 Interrupts

Interrupt functionality is configured via the Interrupt Configuration register. Items that are configurable include

the INT pin configuration, the interrupt latching and clearing method, and triggers for the interrupt. Items that

can trigger an interrupt are (1) Clock generator locked to new reference oscillator (used when switching clock