Evaluation Board User Guide
UG-150
One
Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluating the ±250°/Sec, Single Chip Rate Gyro
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 2
GENERAL DESCRIPTION
The EVAL-ADXRS622 is a simple evaluation board that
allows quick evaluation of the performance of the ADXRS622
±250°/sec yaw rate gyro. No additional external components are
required for operation. The EVAL-ADXRS622 has a 20-lead,
dual in-line (0.3 inch width × 0.1 inch pin spacing) interface
that allows easy prototyping of products without BGA
soldering.
CIRCUIT DESCRIPTION
The schematic of the EVAL-ADXRS622 is shown in Figure 1.
The numbers that appear in squares correspond to the pins on
the evaluation board. It is identical to the suggested application
shown in the ADXRS622 data sheet.
The analog and power grounds (AGND and PGND) have
separate power planes in this evaluation board to accommodate
application-specific grounding schemes. If the user requires
only a single ground plane, these nodes can be shorted together.
Both AGND and PGND must be grounded for the evaluation
board to operate properly.
Note that the analog supply voltage and charge pump supply
voltage (AV
CC
and V
DD
) are not connected on the EVAL-
ADXRS622 and that the user can connect these as appropriate
to their application.
The parts layout of the EVAL-ADXRS622 is shown in Figure 2,
and the parts list for the EVAL-ADXRS622 is shown in Table 1.
As delivered, the EVAL-ADXRS622 is set to 10 Hz bandwidth
(C
OUT
= 100 nF). The user can add an external capacitor to
further reduce the bandwidth and improve the noise floor.
SPECIAL NOTES ON HANDLING
Note that the EVAL-ADXRS622 is not reverse polarity
protected. Reversing the power supply or applying
inappropriate voltages to any pin (outside the Absolute
Maximum Ratings listed in the ADXRS622 data sheet) may
damage the EVAL-ADXRS622.
SCHEMATICS AND PARTS LIST/LAYOUT
5A
4A
7B
7C
1B
3F
1E
3A
7D
4F
5F
1C
7E
6G
2G
1D
ADXRS622
C2
C4
C6
10
14
19
20
18
17
13
12
C7
C1
C5
C3
11
3
2
9
7
1
4
8
AGND
NC
AV
CC
V
RATIO
TEMP
RATEOUT
SUMJ
ST1
ST2
CP5
CP1
CP2
CP4
CP3
PGND
NC = NO CONNECT
V
DD
09109-
001
Figure 1. EVAL-ADXRS622 Schematic
C2
C4
C1
C3
C6
C7
C5
PIN 20
PIN 1
0.1"
0.9"
0.3"
TOP VIEW
09109-
002
Figure 2. EVAL-ADXRS622 Parts Layout
Table 1. EVAL-ADXRS622 Parts List
Component
Value (nF)
C1
100
C2
22
C3
100
C4
22
C5
100
C6
100
C7
100
