4ch ADC+Tacho,Charge Input


The 8405 provides 4 inputs for charge mode transducers. These are normally high temperature accelerometers. Charge mode transducers are normally used in automotive and aerospace applications where heat and low frequency response are important. The 8405 offers an impressive input range of ±68pC to ±68000pC full scale deflection (FSD) with, importantly, a large number of analogue amplifier steps to maintain and maximize signal resolution.


Description 4ch ADC + Tacho, Charge Input
Input channels 4
Output channels n/a
16-bit sample rate * 400k
24-bit sample rate * 100k
Effective bandwidth 0.4 x sample rate
Anti-aliasing attenuation > 100dB
AC Coupling high pass filter 40db/dec -3dB at 0.5Hz
DC Input No
AC Input No
IEPE Input No
Charge Input Yes
Programmable excitation No
24-bit Dynamic range 105dB at 10Ks/s
24-bit Noise floor -120dB at 10Ks/s
16-bit Dynamic range 92dB at 10Ks/s
16-bit Noise floor -110dB at 10Ks/s
Non-linearity < 1 bit
Accuracy ±0.1% FSD
DC Offset control ±50% FS in 32768 steps
Tacho channels 1
Tacho input range ±28V
Supports TEDS No
Autozero Yes
Input range ±68pC to ±68000pC
Output range n/a
Gain Steps 13
Input common mode range n/a
Absolute max input range n/a
Prog bridge completion No
Connector BNC
Power usage (worst case) 6W


  • 4 analog 24-bit charge inputs
  • BNC connectors
  • Tacho input sampled at up to 800k samples/second/channel
P8000 card list
P8000 overview

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