LPR410AL [STMICROELECTRONICS]

MEMS motion sensor: dual-axis pitch and roll ±100 dps analog gyroscope; MEMS运动传感器：双轴俯仰和横滚± 100的dps模拟陀螺仪


型号：	LPR410AL
厂家：	ST
描述：	MEMS motion sensor: dual-axis pitch and roll ±100 dps analog gyroscope MEMS运动传感器：双轴俯仰和横滚± 100的dps模拟陀螺仪模拟IC 传感器信号电路 PC
文件：	总14页 (文件大小：259K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LPR410AL

MEMS motion sensor:

dual-axis pitch and roll 100 dps analoꢀ ꢀyroscope

Features

■ 2.7 V to 3.6 V sinꢀle-supply operation

■ Wide operatinꢀ temperature ranꢀe

(-40 °C to +85 °C)

LGA-28 (4x5x1 mm)

■ Hiꢀh stability over temperature

■ Analoꢀ absolute anꢀular-rate outputs

The LPR410AL has a full scale of 100 dps and is

capable of detectinꢀ rates with a -3 dB bandwidth

up to 140 Hz.

■ Two separate outputs for each axis

(1x and 4x amplified)

■ Inteꢀrated low-pass filters

■ Low power consumption

■ Embedded power-down

■ Embedded self-test

The device includes a sensinꢀ element composed

of a sinꢀle drivinꢀ mass, kept in continuous

oscillation and capable of reactinꢀ, based on the

Coriolis principle, when an anꢀular rate is applied.

A CMOS IC provides the measured anꢀular rate

to the external world throuꢀh an analoꢀ output

voltaꢀe, allowinꢀ hiꢀh levels of inteꢀration and

production trimminꢀ to better match sensinꢀ

element characteristics.

■ Sleep mode

■ Hiꢀh shock and vibration survivability

■ ECOPACK RoHS and “Green” compliant

(see Section 6)

ST's family of ꢀyroscopes leveraꢀes on the

mature and robust manufacturinꢀ process already

used for the production of micro-machined

accelerometers.

Applications

■ GPS naviꢀation systems

■ Motion trackinꢀ

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.

■ Pointinꢀ devices, remote and ꢀame controllers

■ Motion controlled user interface

■ Industrial and robotics

LPR410AL is available in a plastic land ꢀrid array

(LGA) packaꢀe, which ST successfully pioneered

for accelerometers.Today ST has the widest

manufacturinꢀ capability and stronꢀest expertise

in the world for production of sensors in plastic

LGA packaꢀes.

Description

The LPR410AL is a low-power dual-axis

micromachined ꢀyroscope capable of measurinꢀ

anꢀular rate alonꢀ pitch and roll axes.

It provides excellent temperature stability and

hiꢀh resolution over an extended operatinꢀ

temperature ranꢀe (-40 °C to +85 °C).

Table 1.

Device summary

Order code

Temperature range (°C)

Package

Packing

LPR410AL

-40 to +85

LGA-28 (4x5x1)

Tray

LPR410ALTR

Tape and reel

October 2009

Doc ID 16573 Rev 1

1/14

www.st.com

Contents

LPR410AL

Contents

Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1

Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1

2.2

Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1

4.2

4.3

4.4

4.5

Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Zero-rate level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hiꢀh pass filter reset (HP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Sleep mode, self test and power down . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1

5.2

Output response vs. rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Solderinꢀ information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2/14

Doc ID 16573 Rev 1

LPR410AL

Block diagram and pin description

Figure 1.

Block diagram

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1.1

Pin description

Figure 2.

Pin connection

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Doc ID 16573 Rev 1

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Block diagram and pin description

LPR410AL

Table 2.

Pin #

Pin description

Pin name

Analog function

OUT X

X rate siꢀnal output voltaꢀe (not amplified)

Internally not connected

Input of 4x amplifier

4xIN X

Internally not connected

X rate siꢀnal output voltaꢀe (amplified)

Internally not connected

Power supply

4xOUTX

Vdd

Internally not connected

Y rate siꢀnal output voltaꢀe (amplified)

Internally not connected

Input of 4x amplifier

4xOUTY

4xIN Y

VCONT

FILTVDD

Vdd

PLL filter connection pin #17

PLL filter connection pin #18

Reserved. Connect to Vdd

Y rate siꢀnal output voltaꢀe (not amplified)

Internally not connected

Reference voltaꢀe

OUTY

Vref

Internally not connected

Hiꢀh-pass filter reset (loꢀic 0: normal operation mode;

loꢀic1: external hiꢀh-pass filter is reset)

Res

GND

Reserved. Leave unconnected or connect to Vdd

0V supply voltaꢀe

Self-test (see Table 6)

SLEEP/PD

Sleep mode / power-down mode (see Table 6)

4/14

Doc ID 16573 Rev 1

LPR410AL

Mechanical and electrical specifications

2.1

Mechanical characteristics

(a)

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

Table 3.

Symbol

FSA

Mechanical characteristics

Parameter

Test condition

Min.

Typ.⁽¹⁾

Max.

Unit

4x OUT (amplified)

OUT (not amplified)

4x OUT (amplified)

OUT (not amplified)

100

400

dps

Measurement ranꢀe

Sensitivity⁽²⁾

SoA

mV/ dps

2.5

Sensitivity chanꢀe vs.

temperature

SoDr

Delta from 25°C

0.07

%/°C

Voff

Vref

Zero-rate level⁽³⁾

1.5

Reference voltaꢀe

Zero-rate level chanꢀe

vs. temperature

OffDr

Delta from 25°C

0.03

dps/°C

Non linearity

Bandwidth⁽³⁾

Best fit straiꢀht line

% FS

140

Self-test output

chanꢀe

Vst

250⁽⁴⁾

0.014

dps/√Hz

°C

Rate noise density

Operatinꢀ

temperature ranꢀe

Top

-40

+85

1. Typical specifications are not ꢀuaranteed.

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

3. The product is capable of measurinꢀ anꢀular rates extendinꢀ 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 ranꢀe is specified in Table 4.

Doc ID 16573 Rev 1

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Mechanical and electrical specifications

LPR410AL

2.2

Electrical characteristics

(b)

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

Table 4.

Symbol

Electrical characteristics

Parameter

Supply voltaꢀe

Test condition

Min.

Typ.⁽¹⁾

Max.

Unit

Vdd

Idd

2.7

3.6

Supply current

PD pin connected to GND

6.8

Supply current sleep

mode

IddSl

2.1

Supply current in power-

down mode

IddPdn

PD pin connected to Vdd

µA

Loꢀic 0 level

Loꢀic 1 level

Loꢀic 0 level

Loꢀic 1 level

0.2*Vdd

Vdd

VST

Self-test input

0.8*Vdd

0.2*Vdd

Vdd

VPD

Top

Power-down input

0.8*Vdd

Operatinꢀ temperature

ranꢀe

-40

+85

°C

1. Typical specifications are not ꢀuaranteed.

b. The product is factory calibrated at 3 V

6/14

Doc ID 16573 Rev 1

LPR410AL

Absolute maximum ratings

Stresses above those listed as “Absolute maximum ratinꢀs” may cause permanent damaꢀe

to the device. This is a stress ratinꢀ only and functional operation of the device under these

conditions is not implied. Exposure to maximum ratinꢀ conditions for extended periods may

affect device reliability.

Table 5.

Symbol

Absolute maximum ratings

Ratings

Maximum value

Unit

Vdd

Vin

Supply voltaꢀe

-0.3 to 6

-0.3 to Vdd +0.3

-40 to +125

Input voltaꢀe on any control pin (SLEEP/PD, ST)

Storaꢀe temperature ranꢀe

T_STG

°C

3000 for 0.5 ms

10000 for 0.1 ms

2 (HBM)

Acceleration

ESD

Electrostatic discharꢀe protection

This is a mechanical shock sensitive device, improper handlinꢀ can cause permanent

damaꢀe to the part

This is an ESD sensitive device, improper handlinꢀ can cause permanent damaꢀe to

the part

Doc ID 16573 Rev 1

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Terminology

LPR410AL

Terminology

4.1

Sensitivity

An anꢀular rate ꢀyroscope is a device that produces a positive-ꢀoinꢀ output voltaꢀe for

counterclockwise rotation around the sensitive axis considered. Sensitivity describes the

ꢀain of the sensor and can be determined by applyinꢀ a defined anꢀular velocity to it. This

value chanꢀes very little over temperature and time.

4.2

4.3

Zero-rate level

Zero-rate level describes the actual output siꢀnal if there is no anꢀular rate present. The

zero-rate level of precise MEMS sensors is, to some extent, a result of stress to the sensor

and therefore zero-rate level can sliꢀhtly chanꢀe after mountinꢀ the sensor onto a printed

circuit board or after exposinꢀ it to extensive mechanical stress. This value chanꢀes very

little over temperature and time.

Self-test

Self-test allows testinꢀ of the mechanical and electrical part of the sensor, allowinꢀ the

seismic mass to be moved by means of an electrostatic test-force. The self-test function is

off when the ST pin is connected to GND. When the ST pin is tied to Vdd, an actuation force

is applied to the sensor, emulatinꢀ a definite Coriolis force. In this case the sensor output

exhibits a voltaꢀe chanꢀe in its DC level which is also dependent on the supply voltaꢀe.

When ST is active, the device output level is ꢀiven by the alꢀebraic sum of the siꢀnals

produced by the velocity actinꢀ on the sensor and by the electrostatic test-force. If the output

siꢀnals chanꢀe within the amplitude specified in Table 3, then the mechanical element is

workinꢀ properly and the parameters of the interface chip are within the defined

specifications.

4.4

4.5

High pass filter reset (HP)

The LPR410AL provides the possibility to reset the optional external hiꢀh-pass filter by

applyinꢀ a hiꢀh loꢀic value to the HP pad. This procedure ensures faster response,

especially durinꢀ overload conditions. Moreover, this operation is recommended each time

the device is powered.

Sleep mode, self test and power down

The LPR410AL enables advanced power-savinꢀ features thanks to the availability of three

different operatinꢀ modes. When the device is set in a Sleep mode confiꢀuration, the

readinꢀ chain is completely turned off, resultinꢀ in low power consumption. In this condition

the device turn-on time is siꢀnificantly reduced, allowinꢀ simple external power cyclinꢀ.

In accordance with the table below, the user can select the desired operatinꢀ mode usinꢀ

two dedicated pins (ST and SLEEP/PD).

8/14

Doc ID 16573 Rev 1

LPR410AL

Terminology

Table 6.

Sleep mode and Power down mode configuration

Operating mode

ST pin

SLEEP/PD pin

Normal mode

Power-down

Self-test

Sleep mode

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Application hints

LPR410AL

Application hints

Figure 3.

LPR410AL electrical connections and external components values

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Power supply decouplinꢀ capacitors (100 nF ceramic or polyester + 10 µF aluminum) should

be placed as near as possible to the device (common desiꢀn practice).

The LPR410AL allows band limitinꢀ of the output rate response throuꢀh the use of an

external low-pass filter (recommended) in addition to the embedded low-pass filter

(f = 140 Hz).

4xOUTX and 4xOUTY are, respectively, OUTX and OUTY amplified output lines, internally

buffered to ensure low output impedance.

If external low-pass filterinꢀ is not applied, it is mandatory to short-circuit pin 1 to pin 5 and

pin 16 to pin 20, respectively, when amplified outputs are used.

When only a non-amplified output is used (OUTX/OUTZ), it is recommended to set pin 5

and 16 to a fixed reference voltaꢀe (Vref).

The LPR410AL IC includes a PLL (phase-locked loop) circuit to synchronize drivinꢀ and

sensinꢀ interfaces. Capacitors and resistors must be added at the FILTVDD and VCONT

pins (as shown in Figure 3) to implement a low-pass filter.

10/14

Doc ID 16573 Rev 1

LPR410AL

Application hints

5.1

Output response vs. rotation

Figure 4.

Output response vs. rotation

ꢀ :

3TEADY 3TATE POSITIONꢎ

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INCREASE OUTPUT VALUE OVER ZEROꢄRATE LEVELꢎ

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5.2

Soldering information

The LGA packaꢀe is compliant with the ECOPACK , RoHS and “Green” standards.

It is qualified for solderinꢀ heat resistance in accordance with JEDEC J-STD-020.

Leave “pin 1 indicator” unconnected durinꢀ solderinꢀ.

Land pattern and solderinꢀ recommendations are available at www.st.com

Doc ID 16573 Rev 1

11/14

Package information

LPR410AL

Package information

In order to meet environmental requirements, ST offers these devices in different ꢀrades of

ECOPACK packaꢀes, dependinꢀ on their level of environmental compliance. ECOPACK

specifications, ꢀrade definitions and product status are available at: www.st.com.

ECOPACK is an ST trademark.

Figure 5.

LGA-28: mechanical data and package dimensions

1.1

0.855

0.200

3.850

4.850

4.000

5.000

3.75

4.150

5.150

2.75

0.500

0.075

2.200

1.700

0.325

0.250

0.200

0.050

0.100

0.265

0.19

0.385

0.310

LGA-28 (4x5x1mm)

Land Grid Array Package

8181393A

12/14

Doc ID 16573 Rev 1

LPR410AL

Revision history

Table 7.

Date

29-Oct-2009

Document revision history

Revision

Changes

Initial release.

Doc ID 16573 Rev 1

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LPR410AL

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Doc ID 16573 Rev 1

LPR410AL [STMICROELECTRONICS]

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