ADXRS652BBGZ Analog Devices Inc, ADXRS652BBGZ Datasheet - Page 10

• Manufacturer Part Number: ADXRS652BBGZ
• Description: ?250?/sec Yaw Rate Industrial Gyroscope
• Manufacturer: Analog Devices Inc

Specifications of ADXRS652BBGZ

• Range °/s: ±250°/s
• Sensitivity: 7mV/°/s
• Typical Bandwidth: 2.5kHz
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 3.5mA
• Output Type: Ratiometric
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-CBGA
• Acceleration Range: 2000g
• No. Of Axes: 1
• Sensor Case Style: BGA
• No. Of Pins: 32
• Supply Voltage Range: 4.75V To 5.25V
• Operating Temperature Range: -40°C To +105°C
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

ADXRS652
ADXRS652 AND SUPPLY RATIOMETRICITY
The ADXRS652 RATEOUT and TEMP signals are ratiometric
to the V
temperature outputs are proportional to V
is most easily used with a supply-ratiometric analog-to-digital
converter, which results in self-cancellation of errors due to minor
supply variations. There is some small error due to nonratiometric
behavior. Typical ratiometricity error for null, sensitivity, self-test,
and temperature output is outlined in Table 4.
Note that V
Table 4. Ratiometricity Error for Various Parameters
Parameter
ST1
ST2
Null
Sensitivity
V
NULL ADJUSTMENT
The nominal 2.5 V null is for a symmetrical swing range at
RATEOUT (1B, 2A). However, a nonsymmetric output swing
may be suitable in some applications. Null adjustment is possible
by injecting a suitable current to SUMJ (1C, 2C). Note that supply
disturbances may reflect some null instability. Digital supply noise
should be avoided, particularly in this case.
TEMP
Mean
Sigma
Mean
Sigma
Mean
Sigma
Mean
Sigma
Mean
Sigma
RATIO
RATIO
voltage; that is, the null voltage, rate sensitivity, and
must never be greater than AV
V
0.3%
0.21%
−0.15%
0.22%
−0.3%
0.2%
0.003%
0.06%
−0.2%
0.05%
S
= V
RATIO
= 4.85 V
RATIO
V
0.2%
0.09%
0.19%
−0.2%
−0.05%
0.08%
−0.25%
0.06%
−0.04%
0.06%
S
. So the ADXRS652
= V
CC
RATIO
.
= 5.15 V
Rev. A | Page 10 of 12
SELF-TEST FUNCTION
The ADXRS652 includes a self-test feature that actuates each of
the sensing structures and associated electronics in the same
manner, as if subjected to angular rate. It is activated by standard
logic high levels applied to Input ST1 (5F, 5G), Input ST2
(4F, 4G), or both. ST1 causes the voltage at RATEOUT to change
about −0.5 V, and ST2 causes an opposite change of +0.5 V. The
self-test response follows the viscosity temperature dependence
of the package atmosphere, approximately 0.25%/°C.
Activating both ST1 and ST2 simultaneously is not damaging.
ST1 and ST2 are fairly closely matched (±5%), but actuating
both simultaneously may result in a small apparent null bias
shift proportional to the degree of self-test mismatch.
ST1 and ST2 are activated by applying a voltage equal to V
to the ST1 pin and the ST2 pin. The voltage applied to ST1 and
ST2 must never be greater than AV
CONTINUOUS SELF-TEST
The on-chip integration of the ADXRS652 gives it higher reliability
than is obtainable with any other high volume manufacturing
method. Also, it is manufactured under a mature BiMOS process
that has field-proven reliability. As an additional failure detection
measure, power-on self-test can be performed. However, some
applications may warrant continuous self-test while sensing rate.
Details outlining continuous self-test techniques are also
available in the
AN-768
Application Note.
CC
.
RATIO