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

 

Back to P8000 description

* All sample rates are specified in number of samples per second per channel