DigiAmp
The DigiAmp is not just an amplifier.
It is a complete high speed, high accuracy, signal conditioning and data
acquisition front-end for strain gage bridge instrumentation. It is perfectly
matched for use with AMTI's force platforms and transducers. The DigiAmp’s internal circuitry provides the following
functions:
Strain gage amplifier
Bridge excitation
Data acquisition (A/D
conversion)
Anti-aliasing filters
Software adjustable
digital filters
A complete amplification
and signal conditioning front-end
Stability, Accuracy and Repeatability
The DigiAmp’s exacting hardware and firmware design provides
the highest stability, lowest noise strain gage signal conditioning platform
available today. Built in quality features include:
Matched resistor packs on
ceramic substrate for thermal and humidity stability
Active front-end
components with lowest possible theoretical noise floor
Internal EMI cages and
isolation
Extensive ground plane
isolation
Inductive and capacitive
ground plane passivation
High stability, high
linearity 16 bit A/D conversion
Internal self measurement
of critical parameters
Built in compensation,
calibration and correction algorithms
Lead wire resistance
compensation
Four KV front-end ESD
protection
Operating Flexibility and Ease of Use
The DigiAmp is designed for a smooth
transition from the legacy world of analog signal conditioning to the modern
world of digital instrumentation. The DigiAmp
provides both analog and Ethernet outputs allowing you to interface with
existing analog data acquisition systems while planning for a future transition
to digital data acquisition and signal conditioning. Some of DigiAmp's
many user interface features include:
Ethernet output for
simple connection to a PC or laptop
Software coordinated setup
and control via Ethernet interface
Cascade up to six
amplifiers on a single Ethernet line
Analog outputs for legacy
applications
Stand alone key pad and
LCD interface for legacy applications
Software adjustable gains
(1000, 2000, 4000, and 8000)
Software adjustable
bridge excitation (0 to 10 volts in 1/16th volt increments)
Software selectable low-pass
Bessel or Butterworth filters
Software filter frequencies
of 10, 20, 30, 50, 100, 200, 300, 500, 1000 Hz
Software auto-zero
Software internal
calibration
DigiAmp Specifications
|
Item |
Specification |
Comment/condition |
|
User interface |
|
|
|
Bridge balance |
Software or manual |
Key pad LCD interface |
|
Gain adjust |
Software or manual |
Key pad LCD interface |
|
Excitation adjust |
Software or manual |
Key pad LCD interface |
|
Filter adjust |
Software or manual |
Key pad LCD interface |
|
Internal calibration |
Software or manual |
Key pad LCD interface |
|
Input channels |
|
|
|
Channels |
6 |
|
|
Input type |
Strain gage |
120 to 1400 ohm bridge |
|
Input protection |
4000 volt ESD
protection |
|
|
Analog outputs |
|
|
|
Channels |
6 |
13 bit |
|
Voltage range |
±10 volt |
|
|
Drive impedance |
1 Kohm |
|
|
Digital output |
|
|
|
Type |
Ethernet |
16 bit |
|
A/D conversion |
|
|
|
Resolution |
16 bit |
1 lsb
linearity |
|
Data rate(1) |
96000 |
samples per second |
|
Data rate(2) |
16000 |
datasets per second |
|
Analog gains |
|
|
|
Range |
1000, 2000, 4000, 8000 |
.02% linearity |
|
Excitation voltage |
|
|
|
Range |
0-10 volts |
1/16th volt steps |
|
Anti aliasing filters |
|
|
|
Frequency |
1600 |
Hz |
|
Digital filters |
|
|
|
Frequency |
10, 20, 30, 50, 100,
200, 300, 500, 1000 |
Hz |
|
Type |
Butterworth or Bessel |
|
|
Synchronization |
|
|
|
Modes |
Triggered, gen lock, free run |
|
|
Input type |
Opto isolated RCA jack |
ttl level compatible |
|
Jitter |
65 micro seconds |
typical |
|
Power supply |
|
|
|
Type |
External power brick |
110, 220 volt : 50, 60
Hz |
|
Physical package |
|
|
|
Dimensions |
1.75" x 17.0"
x 12.5" |
H x W x L |
|
Weight |
13 lb |
|
|
Ethernet interface |
|
|
|
Type |
10 Mbs
Ethernet |
|
|
Protocol |
UDP Protocol |
|
|
Cable |
Thinnet (RG-50) |
BNC Connector |
|
Max length |
500 feet |
|
|
Throughput |
up to 96000 s/sec |
PC may limit |
|
|
|
|
