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MODEL ADC1616

 

 

16 CHANNEL, SCANNING, INTEGRATING
ADC WITH 16 BIT RESOLUTION

 

FEATURES:

 

  • 16 BITS PLUS SIGN RESOLUTION
  • PROGRAMMABLE CHANNEL SCAN SELECTION OF 1, 4, 8, OR 16 CHANNELS
  • INSTRUMENTATION AMPLIFIER INPUT
  • INTEGRATING ADC
  • PROTECTED DIFFERENTIAL INPUTS WITH POWER ON OR OFF
  • INTERNAL DATA MEMORY
  • SINGLE WIDTH CAMAC MODULE

 

APPLICATIONS:

  • 16 BIT + SIGN RESOLUTION FOR EXTREMELY HIGH ACCURACY
  • UTILIZES AN INTEGRATING ADC AND TRACKING REGULATORS FOR
    EXCELLENT NOISE REJECTION
  • PROGRAMMABLE ACTIVE CHANNEL SELECTION
  • INSTRUMENTATION INPUT AMPLIFIER PROVIDE EXCELLENT
    SYSTEM OPERATION

 

JOERGER ENTERPRISES, INC. MODEL ADC1616 is a 16 channel scanning ADC with a resolution of 16 bits plus sign packaged in a single width CAMAC module. Great care is taken to insure this resolution. The input amplifier is an instrumentation type, the analog section is powered by tracking regulators, and a high accuracy voltage reference is used. The converter itself is an integrating type controlled by a crystal clock. The input multiplexers which take the 16 differential inputs are voltage protected. They can accept up to ± 35 volts without damage and even with the crate off, a common condition, they can accept up to ± 15 volts safely. As added protection, each signal and return input contains a series resistor. The module can be considered two parts, the analog section and the dataway control section. The analog section continuously scans the inputs, converts the analog input data to digital and stores it in a 16 word memory. Each data word contains 20 bits. Data is read out on 1-16, polarity on 17, overrange on 18, if the unit is in the single channel mode it is read on 19 and if the module is active, on 20. When data is read out it is taken from this data buffer memory. In this way data is always available immediately on demand. Logic is provided to insure that the read and write cycles into the memory never interfere. This logic is such that the system is not aware of these internal timing decisions and correct data is always available when requested. The number of channels to be scanned can be programmably controlled. If all 16 channels are not required the scan can be shortened to the first eight channels or the first four channels. It is also possible to select any individual channel and select feature eliminates the problem associated with scanning ADC’s. It makes it possible to obtain the low per channel cost of a scanning ADC but still have the ability when required to look at any one input at the maximum rate possible by the converter.

SPECIFICATIONS: (for each channel)
INPUT RANGE ± 10 volts
INPUT PROTECTION
POWER ON
POWER OFF		 ± 35 volts
± 15 volts
RESOLUTION 16 bits plus sign
ACCURACY ± .003%
CYCLE TIME 500msec. per channel
INPUT IMPEDANCE 10M ohms minimum

CAMAC COMMANDS:
COMMAND

Q

 FUNCTION
00-15

1

 Reads out data onto R1-20
R1-16 Data
R17 Polarity
R18 Overrange
R19 In Single Channel Mode
R20 Error (not cycling)
10

1

 Reads Module Status
R1-4 Address of Active Channel
R5 Single Channel Mode Active
R6 4 Channel Scan
R7 8 Channel Scan
R10 Error, Module Not Active
115

1

 Reads Identity 00.150.3 in BCD
170

1

 Overwrites Control Register
W1-4 Select Channel Address (W5 must be "1")
W5 Activate Single Channel Mode
W6 Limit Scanner to Channels 0-3
W7 Limit Scanner to Channels 0-7
Z(S2) Power Up Initializes module
X All valid commands return an X=1
CONNECTORS: AMP 552118-1, Mating Conn. AMP 229974-1 or equiv.
INDICATORS: "N" Indicates module is addressed
"ACTIVE" Indicates module is cycling
"ADDRESS" Four LED’s to indicate which is active
POWER REQUIREMENTS +6v, 780ma; +244v, 50ma; -24v, 35ma
SIZE: Single width CAMAC module
TEMPERATURE RANGE: 20° C to 50° C

 

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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