ISZ-500 INVENSENSE, ISZ-500 Datasheet - Page 13

• Manufacturer Part Number: ISZ-500
• Description: GYRO, SINGLE (Z) AXIS, +/-500 DEG/S
• Manufacturer: INVENSENSE

Specifications of ISZ-500

• No. Of Axes: 1
• 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 ISZ-500 gyro has two Z-outputs, with scale factors and full-scale sensitivities as summarized
below.
Having two sensitivities and two full-scale ranges for one 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 slower 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 Z4.5OUT output
effectively giving the user additional two-plus bits of resolution.
The ISZ-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
Z4.5OUT output.
AZ works by keeping the gyro’s Zero-Rate Output (ZRO) close to VREF, and thus allows the user to
achieve a wider usable signal range, without using an external analog high pass filter.
(Gyro Output Voltage – Gyro Zero-Rate Out) / Sensitivity
Axis
External Low-Pass Circuitry
Gyro Outputs
Auto Zero
Z
-10
-15
-20
-25
-30
10
-5
5
0
1
ISZ-500 Single-Axis Z-Gyroscope
Gyro Output
Z4.5OUT
Z-OUT
Product Specification
10
13 of 24
Phase
LPF Phase & Gain
Frequency (Hz)
Figure 5
Sensitivity (mV/º/s)
9.1
2
100
Gain
Nominal
Limits
PS-ISZ-0500B-00-03
Release Date: 07/08/09
Full-Scale Range (±º/s)
1000
10
5
0
-5
-10
-15
-20
-25
-30
500
110