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36 Trigno Wireless System User’s Guide TM
(1) Range is specified for the input of the EMG sensor and is samples with 16 bits
(2) ADC Resolution is specified for the input of the sensor.
(3) Filter is designed as a maximally flat Butterworth to preserve EMG signal amplitude and
phase linearity.
(4) Input-referred noise is calculated as a root mean square over a 5 second window sampled at
2kHz.
(5) CMRR is measured for a minimum 200 mV common mode input signal at a frequency of
60Hz.
(6) EMG signal sampling rates are intrinsic to the sensor and cannot be changed beyond the two
stated rates, which are software selectable.
(7) Sensor skin contacts are made from pure silver and should not be used if allergic reactions to
silver are expected or found to occur.
(1) Accelerometer range is software selectable.
(2) Resolution is calculated with 8 bits over the full 3.3V dynamic range, encompassing
accelerometer ideal maximum outputs of ±2.1g and ±8.0g. Ratings exceeding the nominal
range of ±1.5g and ±6 g may be non linear and are not guaranteed
(3) Calculated over a 50 Hz bandwidth and range setting of ±1.5g.
(4) Offset errors can nulled in software by using a calibration routine that references the normal
gravitation force.
(5) Accelerometer sampling rates are intrinsic to the sensor and cannot be changed beyond the
two stated rates, which are software selectable.
Contact Dimension 5 x 1 mm.
Contact Material
(7) 99.9% Silver
ACCELEROMETER SPECIFICATIONS
Number of Axis 3 DOF
Range
(1,2)
±1.5g
±6g
Sampling Resolution
(2)
0.016 ± 0.001 g/bit (at ±1.5g)
0.063 ± 0.005 g/bit (at ±6g)
Accelerometer Noise
(3) 0.0025g (rms)
Bandwidth DC - 50±5 Hz, 20dB/dec
Offset Error
(4)
±0.21g (XY)
+0.21g / -0.42g (Z)
Sampling Rate
(5) 148.1 / 296.3 samples sec
EMG SENSOR SPECIFICATIONS