IDG-500 INVENSENSE, IDG-500 Datasheet - Page 13

• Manufacturer Part Number: IDG-500
• Description: GYRO, DUAL (X+Y) AXIS, +/-500 DEG/S
• Manufacturer: INVENSENSE

Specifications of IDG-500

• No. Of Axes: 2
• Sensor Case Style: QFN
• No. Of Pins: 28
• Supply Voltage Range: 2.7V To 3.3V
• Operating Temperature Range: -20°C To +85°C
• Sensitivity Per Axis: 2mV / ° / S
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CONFIDENTIAL & PROPRIETARY
8.2.6
To further attenuate high-frequency noise, an optional external low-pass filter may be used.
8.2.7
The IDG-500 gyro has two X-outputs and two Y-outputs, with scale factors and full-scale sensitivities
as summarized below.
Having two sensitivities and two full-scale ranges per axis allows the end user to have one output that
can be used for faster motions over a full scale range of ±500º/sec, and a second output that can be
used for more precise motions over a full scale range of ±110º/sec. Thus a lower-resolution analog-to-
digital converter (ADC) may be used to digitize the motion, with the gain of 4.5 in the X4.5OUT and
Y4.5OUT outputs effectively giving the user an additional two-plus bits of resolution.
The IDG-500 gyro outputs are independent of supply voltage (i.e. they are not ratiometric).
Gyro rotation rate is calculated as:
where the Zero-Rate Output (ZRO) is nominally VREF. There is a temperature dependence to ZRO,
and an initial accuracy to ZRO.
8.2.8
Auto Zero (AZ) is a function that is used to maximize the gyro’s dynamic range when using the
X4.5OUT and Y4.5OUT outputs.
(Gyro Output Voltage – Gyro Zero-Rate Out) / Sensitivity
Axis
External Low-Pass Circuitry
Gyro Outputs
Auto Zero
X
Y
-10
-15
-20
-25
-30
10
-5
5
0
1
Gyro Output
IDG-500 Dual-Axis Gyroscope
X4.5OUT
Y4.5OUT
X-OUT
Y-OUT
Product Specification
10
13 of 25
Phase
LPF Phase & Gain
Frequency (Hz)
Figure 5
Sensitivity (mV/º/s)
2.0
9.1
2.0
9.1
100
Gain
Nominal
Limits
PS-IDG-0500B-00-06
Release Date: 07/28/09
Full-Scale Range (±º/s)
1000
10
5
0
-5
-10
-15
-20
-25
-30
500
110
500
110