Hytec Electronics Ltd
IP-ADC-8403

The Hytec IP-ADC-8403 is a single-width  Industry Pack that provides 8 channels of simultaneously sampled analogue to digital conversion with the following characteristics:-

1. Overall

Two 24 bit ADCs
Each ADC multiplexer has 4 differential or 8 pseudo-differential inputs
On-chip ADC temperature sensors
Open-circuit and short-circuit input detection
Programmable current sources for excitation
Programmable gain amplifiers provide gains from 1 to 128
Programmable offset DACs allow input to amplifier to be offset to 1/2 FSR
Programmable self-calibration.
Fast settling and sinc notch filters for interference rejection
Front-end isolated to 100V when used with DC-DC Converters
Choice of straight-through or filtered  transition board with excitation options

 

2. Product Specification  

Size:Single width Industry Pack 1.8ins x 3.9 ins
Operating temp:0 to 45 deg C ambient
Power:+5V @ 300mA typical, +12V @ 100mA, -12V @ 10mA typical
Isolation:100V  (external power) ISOGND-VMEGND

2.1 ADC  

Number of channels:8 differential /16  pseudo-differential inputs plus Common
Input voltage range:+/-2.5V with respect to Common or another input in the range 0V to +5V 
Resolution:Up to 22 bits dependent on ADC setup
No missing codes:24 bits
Conversion time per channel:Depending on clock, decimation values (set by ADC sample rate) and number of channels sampled e.g.8 channels at an ADC sample of 200Hz = 100ms/chan     
Int. Non-linearity+/-0.0015% of full scale max.
Offset :7.5ppm of full scale range typical
Offset drift:0.02 ppm per deg C typical
Gain error:+/-0.05% of full scale range (+/-0.002% with calibration factor)
Gain error drift:0.5 ppm per deg C typical
Bandwidth:10Hz to -3dB
Throughput:100 conversions per sec max with ext clock
Noise:10uV r.m.s.
Distortion:-105dB for 1kHz input
CMRR:-100dB
CMV:+5V, -0.2V with respect to ISOGND
Data format:Binary
Memory:512K x 32 bits (32K samples per channel).

IDAC 

Number of channels2
Full-scale current0.5mA (range 1), 1mA (range 2), 2mA (range 3)
Short circuit durationIndefinite
Resolution8 bits
Monotonicity8 bits
INL+/-0.4LSB typical
DNL+0.4/-0.1 LSB typical
Compliance voltage+4V
Absolute Error5%
Offset Drift+/- 2 ppm/deg C typical
Gain Drift+/-125ppm/deg C typical

Vref Out  

Number of outputs2
Voltage+2.5V
Error+/-0.05% max
Drift1ppm/degC max.
Current available10mA min.

Operating Modes

3.1 Scanning

There are three operating modes:-

1. DC sampling - when the 8403 is armed the inputs are scanned and logged to memory and channel registers hold the last ADC reading.  This will cause an interrupt when the memory is full and will wrap around until halted by the user.
2. Triggered sampling - as above but where the inputs are scanned for a programmed number of scans as entered in to the NCO register. 
3. User controlled - Here the user controls the ADC.

3.2 Excitation

Three  excitation signal types are available:-

1. +5V regulated output derived from the +12V (as selected from external or VME supplies)
2. Two +2.5V buffered Vref outputs  
3. Two 8 bit programmable IDAC outputs.

An isolated digital calibration enable (/CALEN) signal can be generated by command for switching calibration voltages.

3.3 Sampling Clock

On-chip, programmed or external sampling clocks may be selected according to filter and conversion rate requirements.  The conversion rate and the filtering are setup using the on board registers of the ADC ICs.

4. Memory Map

The memory is used to record ADC data.  

4.1 Conversion Memory

The  conversion memory contains 512k samples of 32 bits each.
These are each divided into sixteen segments allocated to conversions from ADC A  chan 1 to chan 8 and ADC B chan 1 to chan 8 .
When the memory is full the Full Flag status is set.

 

For full product specification 8403 in Adobe Acrobat form
Download User Maual for the 8403.

Adobe Acrobat is used for many pages, for a free download click


 

 

HYTEC Head Office
Post : 5 Cradock Road, Reading, Berkshire,
RG2 0JT, England.
Phone : +44 (0)118 9757770
Fax : +44 (0)118 9757566

Email : sales@hytec-electronics.co.uk

 

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Copyright © 2003 [Hytec Electronics Ltd]. All rights reserved. Information in this document is subject to change without notice. Other products and companies referred to herein are trademarks or registered trademarks of their respective companies or mark holders. send mail to paul@hytec-electronics.co.uk with questions or comments about this web site.