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ADXL50 Arkusz danych(PDF) 2 Page - Analog Devices |
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ADXL50 Arkusz danych(HTML) 2 Page - Analog Devices |
2 / 16 page ADXL50–SPECIFICATIONS ADXL50J/A Parameter Conditions Min Typ Max Units SENSOR INPUT Measurement Range Guaranteed Full Scale –50 +50 g Nonlinearity Best Fit Straight Line, 50 g FS 0.2 % of FS Alignment Error 1 ±1 Degrees Transverse Sensitivity2 ±2% SENSITIVITY Initial Sensitivity at VPR +25 °C 16.1 19.0 21.9 mV/g Temperature Drift 3 0.75/1.0 % of Reading ZERO g BIAS LEVEL at VPR Initial Offset 1.55/1.60 1.80 2.05/2.00 V vs. Temperature3 ±15/35 mV vs. Supply VS = 4.75 V to 5.25 V 10 32 mV/V NOISE PERFORMANCE at VPR Voltage Noise Density BW = 10 Hz to 1 kHz 6.6 12 mg/ √Hz Noise in 100 Hz Bandwidth 66 mg rms Noise in 10 Hz Bandwidth 20 mg rms FREQUENCY RESPONSE 3 dB Bandwidth 4 C1 = 0.022 µF (See Figure 22) 800 1300 Hz 3 dB Bandwidth 4 C1 = 0.0068 µF 10 kHz Sensor Resonant Frequency 24 kHz SELF TEST INPUT Output Change at VPR 5 ST Pin from Logic “0” to “1” –0.85 –1.00 –1.15 V Logic “1” Voltage 2.0 V Logic “0” Voltage 0.8 V Input Resistance To Common 50 k Ω +3.4 V REFERENCE Output Voltage 3.350 3.400 3.450 V Output Temperature Drift 3 ±10 mV Power Supply Rejection DC, VS = +4.75 V to +5.25 V 1 10 mV/V Output Current Sourcing 500 µA PREAMPLIFIER OUTPUT Voltage Swing 0.25 VS – 1.4 V Current Output Source or Sink 30 80 µA Capacitive Load Drive 100 pF BUFFER AMPLIFIER Input Offset Voltage 6 Delta from Nominal 1.800 V ±10 ±25 mV Input Bias Current 520 nA Open-Loop Gain DC 80 dB Unity Gain Bandwidth 200 kHz Output Voltage Swing IOUT = ± 100 µA 0.25 VS – 0.25 V Capacitive Load Drive 1000 pF Power Supply Rejection DC, VS = +4.75 V to +5.25 V 1 10 mV/V POWER SUPPLY Operating Voltage Range 4.75 5.25 V Quiescent Supply Current 10 13 mA TEMPERATURE RANGE Operating Range J 0 +70 °C Specified Performance A –40 +85 °C Automotive Grade* –40 +125 °C NOTES 1Alignment error is specified as the angle between the true and indicated axis of sensitivity, (see Figure 2). 2Transverse sensitivity is measured with an applied acceleration that is 90 ° from the indicated axis of sensitivity. Transverse sensitivity is specified as the percent of transverse acceleration that appears at the VPR output. This is the algebraic sum of the alignment and the inherent sensor sensitivity errors, (see Figure 2). 3Specification refers to the maximum change in parameter from its initial at +25 °C to its worst case value at T MIN to TMAX. 4Frequency at which response is 3 dB down from dc response assuming an exact C1 value is used. Maximum recommended BW is 10 kHz using a 0.007 µF capacitor, refer to Figure 22. 5Applying logic high to the self-test input has the effect of applying an acceleration of –52.6 g to the ADXL50. 6Input offset voltage is defined as the output voltage differential from 1.800 V when the amplifier is connected as a follower (i.e., Pins 9 and 10 tied together). The voltage at Pin 9 has a temperature drift proportional to that of the 3.4 V reference. *Contact factory for availability of automotive grade devices. All min and max specifications are guaranteed. Typical specifications are not tested or guaranteed. Specifications subject to change without notice. (TA = TMIN to TMAX, TA = +25 C for J Grade Only, VS = +5 V, @ Acceleration = 0 g, unless otherwise noted) REV. B –2– |
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