ST LPY450AL User Manual

Two separate outputs for each axis (1x and 4x amplified)

LPY450AL

MEMS motion sensor: dual-axis pitch and yaw ±500 dps analog gyroscope

Features

■2.7 V to 3.6 V single-supply operation

■Wide operating temperature range (-40 °C to +85 °C)

■High stability over temperature

■Analog absolute angular-rate outputs

■

LGA-28 (4x5x1 mm)

The LPY450AL has a full scale of ±500 dps and is capable of detecting rates with a -3 dB bandwidth up to 140 Hz.

■Integrated low-pass filters

■Low power consumption

■Embedded power-down

■Embedded self-test

■Sleep mode

■High shock and vibration survivability

■ECOPACK® RoHS and “Green” compliant (see Section 6)

Applications

■Pointing devices, remote and game controllers

■Gaming applications

■Motion control with user interface

■Industrial and robotics

Description

The LPY450AL is a low-power dual-axis micromachined gyroscope capable of measuring angular rate along pitch and yaw axes.

It provides excellent temperature stability and high resolution over an extended operating temperature range (-40 °C to +85 °C).

The device includes a sensing element composed of a single driving mass, kept in continuous oscillation and capable of reacting, based on the Coriolis principle, when an angular rate is applied.

A CMOS IC provides the measured angular rate to the external world through an analog output voltage, allowing high levels of integration and production trimming to better match sensing element characteristics.

ST's family of gyroscopes leverages on the mature and robust manufacturing process already used for the production of micro-machined accelerometers.

ST is already in the field with several hundred million sensors which have received excellent acceptance from the market in terms of quality, reliability and performance.

The LPY450AL is available in a plastic land grid array (LGA) package, which ST successfully pioneered for accelerometers.Today ST has the widest manufacturing capability and strongest expertise in the world for production of sensors in plastic LGA packages.

Table 1.	Device summary
Order code		Temperature range (°C)	Package	Packing
LPY450AL		-40 to +85	LGA-28 (4x5x1)	Tray
LPY450ALTR		-40 to +85	LGA-28 (4x5x1)	Tape and reel
October 2009		Doc ID 16580 Rev 1		1/14
				www.st.com

Contents	LPY450AL

Contents

1	Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		3
	1.1	Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
2	Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . .		5

2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 7
4	Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
	4.1	Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
	4.2	Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
	4.3	Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
	4.4	High pass filter reset (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
	4.5	Sleep mode, self-test and power-down . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
5	Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10

5.1 Output response vs. rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.2 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

6	Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	12
7	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13

2/14	Doc ID 16580 Rev 1

LPY450AL	Block diagram and pin description

1 Block diagram and pin description

Figure 1. Block diagram

:8		#(!2'%	$%-/$5,!4/2
		!-0,)&)%2		37)4#(%$
						/PTIONAL
				#!0!#)4/2
						,0(0
				,/7 0!33
						&ILTER
				&),4%2
						.OT AMPLIFIED
						FILTERED OUTPUT 8
					'!).	X/548 AMPLIFIED
					X
			8 :
			$2)6).' -!33
					'!).	X/54: AMPLIFIED
					X
			&EEDBACK LOOP
:	:	#(!2'%				.OTTAMPLIFIED
						FILTERED OUTPUT :
		!-0,)&)%2
				37)4#(%$		/PTIONAL
				#!0!#)4/2		,0(0
				,/7 0!33		&ILTER
				&),4%2
			$%-/$5,!4/2
	2EFERENCE	4RIMMING		#LOCK		0HASEAGENERATOR
		CIRCUITS
						!- V

1.1Pin description

Figure 2. Pin connection

+ Ω Z

NC

Vref

NC

HP

Res

GND

ST

SLEEP/PD

(TOP VIEW) DIRECTION OF THE DETECTABLE ANGULAR RATES

21

28

OUT X

20

1

OUT Z

VDD

LPY450AL

NC

FILTVDD

NC

FILTVDD

+ Ωx

VCONT

(BOTTOM VIEW)

NC

4xIN X

FILTIN Y

4xIN Z

NC

15

6

NC

FILTOUT

Y/

OUT Y

14

7

4xOUTX

NC

NC

NC

NC

VDD

NC

4xOUTZ

AM03851v1

Doc ID 16580 Rev 1

3/14

Block diagram and pin description			LPY450AL
	Table 2.	Pin description
	Pin #	Pin name	Analog function
	1	OUT Z	Z rate signal output voltage (not amplified)
	2	NC	Internally not connected
	3	NC	Internally not connected
	4	NC	Internally not connected
	5	4xIN Z	Input of 4x amplifier
	6	NC	Internally not connected
	7	4xOUTZ	Z rate signal output voltage (amplified)
	8	NC	Internally not connected
	9	Vdd	Power supply
	10	NC	Internally not connected
	11	NC	Internally not connected
	12	NC	Internally not connected
	13	NC	Internally not connected
	14	4xOUTX	X rate signal output voltage (amplified)
	15	NC	Internally not connected
	16	4xIN X	Input of 4x amplifier
	17	VCONT	PLL filter connection pin #17
	18	FILTVDD	PLL filter connection pin #18
	19	Vdd	Reserved. connect to Vdd
	20	OUTX	X rate signal output voltage (not amplified)
	21	NC	Internally not connected
	22	Vref	Reference voltage
	23	NC	Internally not connected
	24	HP	High-pass filter reset (logic 0: normal operation mode;
			logic1: external high-pass filter is reset)
	25	Res	Reserved. Leave unonnected or connect to Vdd
	26	GND	0V supply voltage
	27	ST	Self-test (see Table 6)
	28	SLEEP/PD	Sleep mode / power-down mode (see Table 6)

4/14	Doc ID 16580 Rev 1

LPY450AL	Mechanical and electrical specifications

2 Mechanical and electrical specifications

2.1Mechanical characteristics

Vdd = 3 V, T = 25 °C unless otherwise noted(a)

Table 3.	Mechanical characteristics
Symbol	Parameter	Test condition	Min.	Typ.(1)	Max.	Unit
FSA	Measurement range	4x OUT (amplified)		±500		dps
FS		OUT (not amplified)		±2000		dps
SoA	Sensitivity(2)	4x OUT (amplified)		2		mV/dps
So		OUT (not amplified)		0.5		mV/dps
SoDr	Sensitivity change vs.	Delta from 25°C		0.07		%/°C
	temperature
Voff	Zero-rate level(3)			1.5		V
Vref	Reference voltage			1.5		V
OffDr	Zero-rate level change	Delta from 25°C		0.08		dps/°C
	vs. temperature
NL	Non linearity	Best fit straight line		±1		% FS
BW	Bandwidth(3)			140		Hz
Vst	Self-test output			250(4)		mV
	change
Rn	Rate noise density			0.025		dps/√Hz
Top	Operating		-40		+85	°C
	temperature range

1.Typical specifications are not guaranteed.

2.Sensitivity and zero-rate level are not ratiometric to supply voltage.

3.The product is capable of measuring angular rates extending from DC to the selected BW.

4.Self test typical absolute value.

a. The product is factory calibrated at 3 V. The operational power supply range is specified in Table 4.

Doc ID 16580 Rev 1

5/14