Document
®
RT3000A/B/C
3-Axis Digital Accelerometer
General Description
Features
The RT3000 is a low power and high accuracy 3 axis acceleration sensor with digital output for portable device. The part has user selectable full scales rages of ±2g, ±4g, ±8g and ±16g, and, it is capable of measuring accelerations with output data rates from 1Hz to 200Hz. The RT3000A is available in MQFN-16L 3x3, RT3000B in MQFN-12L 2x2 (COL) and RT3000C in MDFN-10L 3x3 package.
User programmable ±2g/±4g/±8g/±16g Full-Scale I2C Digital I/O Interface User Programmable Operation Modes : Power
Down, Normal Mode and High Resolution Mode Programmable Interrupts For Motion and
Orientation Detections Embedded FIFO Self-Test Function
Ordering Information
RT3000 Package Type QM : MQFN-16L 3x3 (M-Type) QM : MQFN-12L 2x2 (COL) (M-Type) QM : MDFN-10L 3x3 (M-Type)
Operating Temperature Range G : Green (Halogen Free and Pb Free)
Applications
Smartphones Tablet PC Notebook PND GPS Remote Controller
Note :
A : MQFN-16L 3x3 B : MQFN-12L 2x2 (COL) C : MDFN-10L 3x3
Gaming Toys
Richtek products are :
RoHS compliant and compatible with the current require ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
NC NC VDD
SCL NC
VDDIO 1 NC 2
RES 3 SCL 4 NC 5
16 15 14
RES
17 6 78
13 NC 12 GND 11 INT2 10 NC 9 INT1
NC 1 12 11 10 RES
SDA 2
9 GND
VDDIO 3
8 GND
NC 4 5 6 7 VDD
NC 1 RES 2 VDD 3 GND 4 INT1 5
RES
11
10 NC 9 VDDIO 8 NC 7 SDA 6 SCL
INT1 INT2
SDA NC NC
MQFN-16L 3x3
Marking Information
RT3000AGQM
8E=YM DNN
8E= : Product Code YMDNN : Date Code
MQFN-12L 2x2 (COL)
RT3000BGQM
3P : Product Code
3PW
W : Date Code
MDFN-10L 3x3
RT3000CGQM
9F=YM DNN
9F= : Product Code YMDNN : Date Code
Copyright ©2016 Richtek Technology Corporation. All rights reserved. DS3000ABC-00 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com 3
RT3000A/B/C
Function Pin Description
RT3000A (MQFN-16L 3x3)
Name
14 VDD
1 VDDIO
12 GND
6 SDA
4 SCL
9 INT1
11 INT2
2, 5, 7, 8, 10, 13, 15, 16
NC
3 RES
17 (Exposed Pad)
RES
Description Power Supply. Power Supply For I/O Pins. Ground. I2C Serial Data. I2C Serial Clock. Interrupt 1. Interrupt 2. No Internal Connection. (*Note 1) Reserved Pin. (*Note 2) Reserved Pin. (*Note 5)
RT3000B MQFN-12L 2x2 (COL) 7 3
8, 9 2 12 5 6
1, 4, 11 10
Name VDD VDDIO GND SDA SCL INT1 INT2 NC RES
Description Power Supply. Power Supply For I/O Pins. Ground. I2C Serial Data. I2C Serial Clock. Interrupt 1. Interrupt 2. No Internal Connection. (*Note 1) Reserved Pin (*Note 3)
RT3000C (MDFN-10L 3x3)
Name
3 VDD
9 VDDIO
4 GND
7 SDA
6 SCL
5 INT1
1, 8, 10
NC
2 RES
11 (Exposed Pad)
RES
*Note 1 : Recommend floating or connect to VDD or GND. *Note 2 : Must be floating or connect to VDDIO. *Note 3 : Must be floating or connect to GND. *Note 4 : Must be floating or connect to VDD. *Note 5 : Must be floating.
Description Power Supply. Power Supply For I/O Pins. Ground. I2C Serial Data. I2C Serial Clock. Interrupt 1. No Internal Connection. (*Note 1) Reserved Pin. (*Note 4) Reserved Pin. (*Note 5)
Copyright ©2016 Richtek Technology Corporation. All rights reserved. www.richtek.com 2
is a registered trademark of Richtek Technology Corporation.
DS3000ABC-00 May 2016
Functional Block Diagram
VDD
VDDIO
RT3000A/B/C
OSC
X,Y,Z Sensor
CHA
LDO
MTP
AD Converter
Digital Processing
I/O Control
SCL SDA INT1 INT2
GND
Operation
Power Mode The RT3000 has three different power modes: power down mode, normal mode and high resolution mode to offer the customer different power consumption and effective resolution options. The transitions between the power modes are illustrated in figure below
VDD Power On
CTRL1_REG[7:4] = "0000"
Power Down
NOR. Mode (Normal power consumption and
resolution)
HR Mode (Highest power consumption and
resolution)
CTRL4_REG[3] = "0"
CTRL4_REG[3] = "1"
Different mode switch time : 12/ODR ms
When the RT3000 is in power-down mode, almost all internal blocks of the device are switched off except digital interfaces (I2C) are still active to allow communication with the device. The configuration registers content is preserved and output data registers keeping the last data sampled in memory before going into power-down mode.
In normal mode or high resolution mode, it’ s depending on customer’ s application to set related register.
Self-Test
The RT3000 has the self-Test feature for the sensor functionality check by applying electrostatic force to the sensor element. A static offset of the acceleration data could be observed when the self-test activate. The acceleration measurement range should be set to 2g before self-test is enabled. The self-test function is off when the self-test bit (STEN) is programmed to “0”. When the self-test bit is programmed to “1” an actuation force is applied to the sensor, simulating a definite input acceleration. Table 1 shows the typ.