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MODEL ADC3216

 

32 CHANNEL, 16 BIT SCANNING ADC

 

FEATURES:

  • HIGH PRECISION 16 BIT RESOLUTION
  • INSTRUMENTATION AMPLIFIER INPUT
  • PROGRAMMABLE GAIN SELECTION 1, 10, 100, 1000
  • SAMPLE AND HOLD
  • 32 CHANNELS
  • CHANNEL SELECTION PROGRAMMABLE
  • TWO MODES OF OPERATION: CONTINUOUS AND SINGLE SCAN
  • SINGLE WIDTH CAMAC MODULE
  • INPUT FILTERING

 

The JOERGER ENTERPRISES, INC. MODEL ADC3216 is a high precision scanning ADC offering 16 bit resolution. It can accept up to 32 analog inputs and operate in two programmably selected modes. In the "CONTINUOUS" mode it scans the programmably selected active channels and loads the converted data into memory. In the "SINGLE SCAN" mode it is inactive until it receives a trigger either from the dataway or front panel at which time it scans all the active channels once and stops.

To insure 16 bit accuracy, great care was taken in selecting the analog components used and their layout. An instrumentation amplifier is used for accuracy, high input impedance and high common mode rejection. The high impedance eliminates variations in multiplexer impedance and input protection resistors. In addition, the analog supply voltages are generated from a tracking regulator for improved performance. A sample and hold amplifier has also been designed in as an option. The use of this sample and hold feature provides the ability to store the input signal level at the time a conversion is begun and hold it while the converter is active. Another option available is programmable gain of 1, 10, 100 and 1000. This provides the ability to match the converter to the signal level available. In high noise environments the ability to filter each input with a low pass filter is also available.

The module has been designed to provide both high accuracy and versatility. The module can select either a continuous scan or single scan mode. The number of active channels can be selected from 1 to 32 in either mode. As an added feature any one channel, from 0 to 31, can be selected and the module becomes a single channel unit monitoring the one channel selected. To insure proper performance in any mode, great care has been taken in regard to reading and writing the data memory. If a module completes a conversion while the memory is being read it delays loading the new data until the read signal is complete. This insures that no data is ever lost.

 

SPECIFICATIONS:
ANALOG INPUT +10v differential, +5, +10v or +5v jumper select. Protected to +35v.
ACCURACY +.003% of FSR.
COMMON MODE REJECTION
DC to 60Hz Gain of 1000 120db (Typ), gain of 1 95db (Typ).
SAMPLE AND HOLD
Aperture Jitter 150psec.
GAIN SELECTION 1, 10, 100, 1000
SCANNING SPEED 100usec maximum per channel.
CHANNELS 32 maximum, may be programmably selected.
TRIGGER INPUT Negative TTL pulse.

CAMAC COMMANDS:
0x Reads out data from channels 0-15.
1x Reads out data from channels 16-31.
2o Reads out data in single scan mode, Q=0 is returned after last word.
3o Reads out module identity
4o Reads out module status; mode selected, active channels, gain.
8o Tests LAM, Q=1 if LAM is set and enabled.
9o Resets module to continuous scan mode of all 32 channels, resets LAM, set gain to 1.
10o Resets LAM.
16o Writes modules status, operating mode, active channels, and gain.
24o Disables LAM.
25o When in single scan mode, resets LAM, triggers scan.
26o Enables LAM.
27o Tests LAM
X An X response is generated for all valid commands.
Q A Q response is generated for F0, 1, 3, 4, and 16 and when appropriate for F2, 8, 25, 27.
L An L response is generated in the single scan mode when the cycle is completed and enabled
(Z+C)S2 or
Power Up 		Resets module
POWER REQUIREMENTS: 6V; +24V, 46ma; -24V, 60ma
SIZE: Single width CAMAC module.
CONNECTOR: Cannon DC37P, mating connector DC37S
TEMPERATURE RANGE: 0° C to 50° C
OPTIONS: 1 Sample and Hold
2 Programmable Gain
3 Input Filters

 

JOERGER ENTERPRISES, INC 166 Laurel Road, East Northport, NY 11731 USA

1-631-757-6200 (Fax 1-631-757-6201) www.joergerinc.com

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