ST LPR403AL User Manual

LPR403AL

MEMS motion sensor: dual-axis pitch and roll ±30 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

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

■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

■Image stabilization for DVC and DSC

■Image stabilization for camera phones

■Motion controlled user interface

■GPS navigation systems

Description

The LPR403AL is a low-power dual-axis micromachined gyroscope capable of measuring angular rate along pitch and roll axes.

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

LGA-28 (4x5x1 mm)

The LPR403AL has a full scale of ±30 dps and is capable of detecting rates with a -3 dB bandwidth up to 140 Hz.

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 LPR403AL 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
LPR403AL		-40 to +85	LGA-28 (4x5x1)	Tray
LPR403ALTR		-40 to +85	LGA-28 (4x5x1)	Tape and reel
October 2009		Doc ID 16572 Rev 1		1/14
				www.st.com

Contents	LPR403AL

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

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LPR403AL	Block diagram and pin description

1 Block diagram and pin description

Figure 1. Block diagram

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1.1Pin description

Figure 2. Pin connection

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Block diagram and pin description			LPR403AL
	Table 2.	Pin description
	Pin #	Pin name	Analog function
	1	OUT X	X rate signal output voltage (not amplified)
	2	NC	Internally not connected
	3	NC	Internally not connected
	4	NC	Internally not connected
	5	4xIN X	Input of 4x amplifier
	6	NC	Internally not connected
	7	4xOUTX	X 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	4xOUTY	Y rate signal output voltage (amplified)
	15	NC	Internally not connected
	16	4xIN Y	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	OUTY	Y 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 unconnected 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)

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LPR403AL	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)		±30		dps
FS		OUT (not amplified)		±120		dps
SoA	Sensitivity(2)	4x OUT (amplified)		33.3		mV/ dps
So		OUT (not amplified)		8.3		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		0.02		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			0.01		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.

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