FLA-01 Filter/Amplifier

Eight-pole Bessel filter
AC/DC coupling
Differential input mode
Inverting mode
Line frequency notch filter
10 Gain settings (1 to 1000)
Input offset compensation
10 frequency ranges (10 Hz to 10 kHz)

The FLA-01 is a versatile, low cost filter and amplifier combination. It is especially useful as an adjunct to computer A to D or D to A converter, where it can serve the preconditioning/antialiasing or reconstruction functions.

The input stage can be configured for single-ended non-inverting, inverting, two-channel summing, or differential amplification. Coupling is selectable, AC, or DC.

FLA-01 Technical Specifications

INPUT IMPEDANCE:

1 M-Ohm

INPUT COUPLING:

AC or DC

MODES:

A, B, A+B, or A-B

NOTCH FILTER:

precedes amplification, active twin T type selectable 50/60 Hz, >46 dB attenuation

GAIN:

selectable x 1, 2, 5, 10, 20, 50, 100, 200, 500, 1000

OFFSET CONTROL:

scales by gain, x 1 range +/- 8V, x 1000 range +/- 8 mV

OUTPUT:

+/- 10 V maximum

FILTER TYPE:

8 pole Bessel switched capacitor, preceeded and followed by 2 pole analog Bessel filter

CUT OFF FREQUENCY:

selectable 10, 20, 50, 100, 200, 500, 1000, 2000, 5000, 10000 Hz and bypass

NOISE:

Gain x 1 to x 10: < 1 mVpp (200 micro Vrms) at all filter settings [equivalent to > 80 dB dynamic range]

Gain x 100: 40 micro Vpp (8 micro Vrms) referenced to input, DC to 1 kHz

Gain x 1000: 35 micro Vpp (6 micro Vrms) referenced to input, DC to 1 kHz