Description Frequency Devices’ Model VM32PAFF comprises a family of VMEbus amplifier/filter boards offering software programmable differential amplifiers combined with precision 3-pole Butterworth or Bessel linear analog filters in a single width B-size (6U) VME form factor. VM32PAFF boards provide simultaneous access to 32, DC-coupled wideband signals while providing programmable gain from -12dB to +60dB, in 6dB steps. Fixed frequency filters are available with corner frequencies from 100 Hz to 100 kHz. VM32PAFF boards may be configured with 8, 16 or 32 channels. The boards conform to VME revision C.1 as an A16/D16 Slave. Available options include AC coupled input and/or differential output. Features/Benefits: Simultaneous access over 32 channels offers a low cost, versatile and convenient way to provide amplification and filtering. Interchannel crosstalk <-90 dB provides precision per-formance solutions to design engineers, system inte-grators and OEM’s. 3-pole Butterworth or Bessel transfer functions with a broad range of corner frequencies are offered to meet a wide range of applications. High channel count density without sacrificing performance maximizes chassis utilization.     Applications Sonar, navigation and aerospace Engine test and simulation Acoustic and vibration analysis Satellite and telecommunications Laboratory R & D Automatic test equipment (ATE) Industrial process control Amplifier/Filter Options PGAB5-100   -12 dB to +60 dB in 6 dB steps     Butterworth 3-pole 100 Hz to 100 kHz PGAL5-100   -12 dB to +60 dB in 6 dB steps     Bessel 3-pole 100 Hz to 100 kHz   Specifications (@ 25°C and rated power input) Analog Input Impedance: 1 MΩ // 22pF Maximum Input: ±15V AC Couple (Optional Fixed Freq.): 10Hz to 1.0 kHz Analog Output Impedance: 1.0 Ω typ., 10 Ω max. Linear Operating Range: ±5V linear operating range, Output clamped to ±9 V Channel to Channel Crosstalk: <-100dB @ 1 kHz, <-9OdB @ 20 kHz Maximum Current: 5.0mA Offset Voltage: 2mV RTI, NTE 40mV max. Offset Temp. Coeff., RTI: ±(5 +100/G) µV/°C max. Filter Characteristics Anti-alias filtering: 3-pole low-pass Butterworth or Bessel fixed frequency Cut-off Frequency fc (-3dB): Fixed frequency from 100Hz to 100 kHz Amplitude Match*: ±0.1dB @ DC, linear to ±0.25dB at fc Phase Match*: 0.2° typ., 1° max. @ fc Noise Voltage, RTI: 20nV/sqrt(Hz) @ 1 kHz, G=1,000 Distortion @ 1VRMS Output, RL=2kohm: -83dB, 1 kHz single ended -86dB, 1 kHz differential * Any two channels set to same gain and loading Gain Gain Programming (G): 0.25X to 1024X in factors of 2:1 (before filtering), 32 channels programmed over VMEbus with read-back Gain Accuracy @ DC: ±0.1 dB max. VMEbus Interface: A16/D16, D08 (EO), Slave Registers: Three active R/W registers in 64 byte blocks Power Supply From VME Backplane: +5V - 1.0A max. ±12 V - 0.7A max. Environmental 0perating Temperature: 0°C to +70°C Storage Temperature: -25°C to +85°C Humidity: 0-95% non-condensing Mechanical Card Size: VMEbus 6U single slot, 9.17 x 6.3 inches, (233 x 160 mm) No. of Input Channels: 32 Differential - DC coupled No. of Output Channels: 32 Single Ended - DC coupled, Two groups of 16 Differential Output (Optional) Mating Connectors: Input : Male high density 78-pin D-sub, Quantity 1 Output: Female high density 44-pin D-sub, Quantity 2 Weight: 1 LB., (454 grams) Ordering Information 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.