Portable, Modular Signal Conditioning Modules
NI SCC-LP Series Lowpass Filters
Specifications
SCC-LP Series
Amplifier Characteristics
Number of input channels .................. 2 differential
Input signal range............................... ±10 V
Output signal range ............................ ±5 V
Gain .................................................... 0.5
Overvoltage protection ....................... ±40 V
Input impedance ................................. 10 GΩ in parallel with 10 pF
powered on 10 kΩ powered off
Model
Channel
Description
Part Number
777459-07
777459-08
777459-09
777459-10
SCC-LP01
SCC-LP02
SCC-LP03
SCC-LP04
2
2
2
2
Lowpass filter (25 Hz)
Lowpass filter (50 Hz)
Lowpass filter (150 Hz)
Lowpass filter (1 kHz)
or overload
Gain error ............................................ Adjustable to 0ꢀ
Offset error (RTI) ................................. 350 µV typical, 1.5 mV maximum
The National Instruments SCC-LP Series consists of dual-channel
lowpass filter modules that accept two ±10 V signals. Each channel has
a 4th-order Butterworth filter. The cutoff frequency is specific to the
module and applies to both channels of the module.
Filter Characteristics
Filter type ............................................ 4th-order Butterworth
Stop-band attenuation rate ................ 80 dB/decade
Cutoff frequency ................................. SCC-LP01 = 25 Hz
SCC-LP02 = 50 Hz
SCC-LP03 = 150 Hz
SCC-LP04 = 1 kHz
Passband Ripple
Fc = cutoff frequency
Passband
Typical
Maximum
0 ± 0.1 dB max
0 ± 0.2 dB max
-0.2 ± 0.4 dB max
-3 ± 0.5 dB max
1
DC to ⁄
3
Fc
Fc
Fc
0 ± 0.04 dB max
0 ± 0.0± dB max
-0.2 ± 0.25 dB max
-3 ± 0.3 dB max
1
DC to ⁄
2
2
DC to ⁄
3
DC to Fc
System Noise
THD at Fc ............................................. <-90 dB
Wide band noise
(DC to 1 MHz, referred to input)..... 100 µVrms
Narrow band noise
(DC to 33 kHz, referred to input) .... ± µVrms
Stability
Gain temperature coefficient.............. 10 ppm/°C typical, 20 ppm/°C
maximum
Offset drift (RTI) .................................. 3.4 µV/°C typical, 27 µV/°C
maximum
Power Requirements
SCC-LP01, LP02
Analog............................................. 135 mW
SCC-LP03, LP04
Analog............................................. 475 mW
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
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NI [ National Instruments ]
