5BAF Series Differential Low-Pass Filters 6-Pole Description The 5BAF Series are differential-input 6-Pole Butterworth or Bessel low-pass anti-alias filters that are pin-out and package compatible with industrystandard 5B Series signal conditioning modules. Each filter comes factory tuned to a user-specified corner frequency from 1 Hz to 50 kHz. These filters are ideally suited to sharply limit A/D converter bandwidth to eliminate aliasing higher frequency input signals and noise. To serve real-world applications, all 5BAF Series filters are configured with a differential input having a common mode rejection ratio of 74 dB (min.) at 1 kHz. A self contained dc-to-dc converter enables the 5BAF filters to operate from a non-critical +5 ±10% volt power source key in many systems since +5V logic power is readily available. Features/Benefits: • The 10 volt input range with an overall gain of 1 provides an excellent match to both the transducer output and the data acquisition board input • 5BAF modules allow for partitioning between system segments providing a means to minimize ground loops • Factory tuned, no external clocks or adjustments needed • 5B plug-in compatible provides quick and easy installation • Broad range of corner frequencies to meet a wide range of applications Available Low-Pass Models: . . . . . . . . . . . . . .Page 5BAF-LPBE6 6-pole Bessel . . . . . . . . . . . . . . . . .2 5BAF-LPBU6 6-pole Butterworth . . . . . . . . . . . . . .2 General Specifications: Ordering information . . . . . . . . . . . . . . . . . . . . . . . .3 Pin-out/package data . . . . . . . . . . . . . . . . . . . . . . . .3 Applications • Anti-alias filtering • Vibration analysis • Industrial and process control • Noise reduction • Signal reduction • Test systems 1 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com 5BAF Series Differential Low-Pass Filters 6-Pole Model 5BAF-LPBE6 5BAF-LPBU6 Transfer Function 6-Pole, Bessel 6-Pole, Butterworth Size Std. 5B Std. 5B Range fc 1 Hz to 50 kHz 1 Hz to 50 kHz Theoretical Transfer Characteristics Appendix A Page 3 Appendix A Page 8 Impendance 1.0 MΩ min. 1.0 MΩ min. Differential Gain 1 ± 0.03% 1 ± 0.03% Com. Mode Voltage Range ±20 V ±20 V Com. Mode Rejection 74 dB min. @ 1 kHz 74 dB min. @ 1 kHz Voltage Range ± 10 V peak ± 10 V peak Maximum Safe Voltage ±40 V ±40 V Accuracy ±2% max. ±2% max. Stopband Attenuation Rate 36 dB/octave 36 dB/octave Product Specifications (Power ON or OFF) Filter Attenuation (theoretical) Narrow Band Noise 1.89 dB 3.01 dB 60.0 dB 80.0 dB 75 mVrms 0.80 fc 1.00 fc 5.41 fc 7.99 fc 0.29 dB 3.01 dB 60.0 dB 80.0 dB 0.80 fc 1.00 fc 3.16 fc 4.64 fc 75 mVrms 2 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com 5BAF Series Pin-Out and Package Data Ordering Information Specification Pin Designations 1 Analog Input Characteristics See transfer function specifications. NA 1,2 Analog Output Characteristics Impedance (Closed Loop) <1 W typ. 10 W max. Linear Operating Range ±10V pk Maximum Current ±2.0mA Offset Voltage ±3mV typ. Offset Temp. Coeff. ±100 mV/°C Gain Drift ± 30 ppm/°C Output Load See note 3 Power Supply (±Vs) Rated Voltage Quiescent Current (1 kHz to 20 kHz) Quiescent Current (20 kHz to 50 kHz) Vout 20 NA 18 POWER COM NA 21 NA 19 I/O COM 17 + 5V 5 INLO 3 NA 1 NA 16 INHI 6 NA 4 NA 23 22 2 Bottom View Package Data + 5V ± 0.5 Vdc 100 mA typ. 125 mA max. 120 mA typ. 135 mA max. FREQUENCY DEVICES 5BAF Filter Series 0.590 (15.0) 2.250 (57.2) 0.350 (8.6) 0.150 (3.8) 0.075 (1.8) typ 0.375 (9.2) Temperature Operating Storage FREQUENCY DEVICES -25 to + 85°C -40 to + 85°C 0.525 (12.9) 5BAF - LPBU6 6 Pole Butterworth Filter 20.0 kHz 2.250 (57.2) Made in the USA Notes: 1. Input and output signal voltage referenced to I/O COM. 0.375 (9.5) 2. Output is short circuit protected to common. DO NOT CONNECT TO +5V or POWER COM. 2.250 (57.2) 0.475 (11.6) SOCKET for 0.038 PIN 0.590 (15.0) 0.150 (3.8) 1.605 (41.9) 3. Output can drive a series 1.5 kW resistor and 0.0022 mF capacitor without slew rate limiting with a ± 10 V square wave input. INSERT for 3mm SCREW 0.375 (9.5) 0.100 (2.5) 1.175 (29.8) 0.275 (6.7) 0.250 (6.3) Dimensions in inches (mm) Ordering Information 0.0022 mF 5BAF-LPBE6-10.7 kHz 1.5 k W Transfer Function BU - Butterworth BE - Bessel 4. 4 - 3 dB Corner Frequency e.g., 10.7 kHz 1.00 Hz 50.0 kHz How to specify Corner Frequencies: Corner frequencies are specified by attaching a three digit frequency designator to the basic model number. Corner frequencies can range from 1 Hz to 50 kHz. We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements, recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright. IN-005BAF-02 3 25 Locust St, Haverhill, Massachusetts 01830 • Tel: 800/252-7074, 978/374-0761 • FAX: 978/521-1839 e-mail: [email protected] • Web Address: http://www.freqdev.com Low-Pass 6-Pole Appendix A Bessel Theoretical Transfer Characteristics 1 f/fc Amp Phase Delay (Hz) (dB) (deg) (sec) 0.00 0.00 0.00 .430 0.10 -0.029 -15.5 .430 0.20 -0.116 -31.0 .430 0.30 -0.261 -46.5 .430 0.40 -0.465 -62.0 .430 0.50 -0.728 -77.4 .430 0.60 -1.05 -92.9 .430 0.70 -1.44 -108 .430 0.80 -1.89 -124 .430 0.85 -2.15 -132 .430 0.90 -2.42 -139 .430 0.95 -2.70 -147 .430 1.00 -3.01 -155 .430 1.10 -3.68 -170 .429 1.20 -4.44 -186 .428 1.30 -5.29 -201 .426 1.40 -6.23 -216 .422 1.50 -7.29 -232 .416 1.60 -8.46 -246 .401 1.70 -9.74 -261 .393 1.80 -11.1 -275 .376 1.90 -12.6 -287 .357 2.00 -14.2 -300 .335 2.25 -18.3 -328 .279 2.50 -22.6 -351 .228 2.75 -26.7 -369 187 3.00 -30.7 -385 .156 3.25 -34.5 -398 .131 3.50 -38.1 -408 .111 4.00 -44.7 -426 .083 5.00 -55.9 -449 .052 6.00 -65.2 -465 .036 7.00 -73.2 -476 .026 8.00 -80.1 -484 .020 9.00 -86.2 -490 .015 10.0 -91.6 -495 .013 Frequency Response Amp (dB) 0 -40 -60 -80 -100 0.1 2 3 4 56781.0 2 3 4 567 10.0 Normalized Frequency(f/fc) Delay (Normalized) Delay (sec) 1.0 0.5 0.0 3 4 5 6 7 8 91.0 1.5 0.1 0.15 2 Normalized Time (1/f sec) Step Response (V/V) Step Response 1.Normalized Group Delay: The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc). Actual Delay = -20 1.2 1.0 0.8 0.6 0.4 0.2 -0.0 -0.2 0 1 2 3 4 Normalized Time (1/f sec) Normalized Delay Actual Corner Frequency (fc) in Hz 3 25 Locust St., Haverhill, Massachusetts 01830 ∑Tel :800/252-7074, 978/374-0761 ∑FAX:978/521-1839 e-mail: [email protected] ∑Web Address: http://www.freqdev.com ∑Fax on Demand: 978/521-5178 5 Low-Pass 6-Pole Appendix A Butterworth Theoretical Transfer Characteristics 1 f/fc Amp Phase Delay (Hz) (dB) (deg) (sec) 0.00 0.00 0.00 .615 0.10 0.00 -22.2 .617 0.20 0.00 -44.5 .624 0.30 0.00 -67.2 .637 0.40 0.00 -90.4 .656 0.50 -0.001 -115 .685 0.60 -0.009 -140 .731 0.70 -0.060 -167 .803 0.80 -0.289 -198 .911 0.85 -0.578 -215 .970 0.90 -1.080 -233 1.02 0.95 -1.88 -252 1.03 1.00 -3.01 -270 1.00 1.10 -6.17 -304 .845 1.20 -9.96 -331 .660 1.30 -13.9 -352 .518 1.40 -17.6 -368 .417 1.50 -21.2 -382 .345 1.60 -24.5 -393 .291 1.70 -27.7 -403 .251 1.80 -30.6 -412 .219 1.90 -33.5 -419 .193 2.00 -36.1 -425 .171 2.25 -42.3 -439 .132 2.50 -47.8 -450 .105 2.75 -52.7 -458 .086 3.00 -57.3 -465 .071 3.25 -61.4 -471 .060 3.50 -65.3 -476 .052 4.00 -72.2 -484 .039 5.00 -83.9 -496 .025 6.00 -503 .017 -93.4 7.00 -508 .012 -101 8.00 -512 .0097 -108 9.00 -515 .0076 -115 10.0 -518 .0062 -120 Frequency Response Amp (dB) 0 -40 -60 -80 -100 0.1 2 3 4 5 6 78 1.0 2 3 4 5 6 7 10.0 Normalized Frequency(f/fc) Delay (Normalized) Delay (sec) 2.0 1.0 0.0 0.1 0.15 2 3 4 5 6 7 89 1.0 1.5 Normalized Time (1/f sec) Step Response (V/V) Step Response 1.Normalized Group Delay: The above delay data is normalized to a corner frequency of 1.0Hz.The actual delay is the normalized delay divided by the actual corner frequency (fc). Actual Delay = -20 1.2 1.0 0.8 0.6 0.4 0.2 -0.0 0 1 2 3 4 Normalized Time (1/f sec) Normalized Delay Actual Corner Frequency (fc) in Hz 8 25 Locust St., Haverhill, Massachusetts 01830 ∑Tel :800/252-7074, 978/374-0761 ∑FAX:978/521-1839 e-mail: [email protected] ∑Web Address: http://www.freqdev.com ∑Fax on Demand: 978/521-5178 5