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16 A/D Channels (±25 mA); 16-bit SAR per channel

Module ADG features 16 channels with up to 16-bit SAR A/D converters, simultaneous sampling. The maximum programmable, expected full-scale range input for the ADG module is -FS to +FS or 0 to FS; 25, 12.5 mA respectively. The A/D converters have programmable sample rates of up to 200 kHz.

The input range and gain is also field-programmable for each channel. The ability to set lower expected, full-scale voltage gain ranges assures the use of the full resolution. Each channel includes a fixed, second order, anti-aliasing filter and a digital post filter with a programmable breakpoint that enables users to field-adjust the filtering for each channel.

The extended A/D FIFO buffering capabilities of these modules supports greater storage/management of the incoming signal samples (data) for post-processing applications. Data samples can be stored in the buffer either at the maximum programmed base A/D sample rate or by an integer-divided sample rate. Programmable FIFO buffer thresholds maximize data flow control (movement in and out of the FIFO). Incremental relative time-stamping between samples also is provided as a programmable option.

All A/D channels are self-aligning and continuous Background Built-in-Test (BIT) status is provided for channel health and operation feedback. On a rotating basis, each channel is automatically trimmed/tested for optimal conversion and reliability to eliminate offset and gain errors throughout the entire operating envelope (temperature and drift control). Open inputs are sensed and flagged.

  • Number of Channels: 16
  • ADC Type / Architecture: SAR / Individual
  • Key Characteristics Range (max): ±25 mA
  • Effective Resolution Bits: 16
  • Sampling Rate (max.): 200 kHz / Channel

  • Resolution: 16-bit SAR A/D converters. Simultaneous sampling.
  • Input Format: Current (unipolar and bipolar).
  • Input Scaling: Sixteen (16) bipolar or unipolar channels (volts) or (current). Programmable, per channel, as Full Scale (FS) range inputs where range is -FS to +FS or 0 to FS; 25, 12.5 mA. The ability to set lower voltages for FS assures the utilization of the full resolution.
  • Overvoltage Protection: TBD
  • Overcurrent Protection: 30 mA
  • Open Input Sense: N/A
  • Input Impedance: 49.9Ω (PENDING CHARACTERIZATION)
  • Linearity/Accuracy: ≤ ±1.25 V or 0 to 1.25 V Ranges: ±0.12% + (±25 mV) All Other Ranges: ±0.1% FS range over temperature (voltage/current), no missing codes to 16-bits.
  • Gain Error: ±0.25% FS range
  • Offset Error: ±0.02% FS range
  • Integral Non-Linearity (INL): ±3 LSB's max.
  • Differential Non-Linearity (DNL): ±1 LSB's max. (monotonic)
  • Sampling Rate (Programmable): 200 kSPS maximum (decimation at slower sample rate (< 100 kHz, 1 kHz minimum)
  • Data Buffering/Triggering: Independent FIFO sample capture with programmable options (1M 32-bit data elements per channel). See Operations Manual for details
  • Acquisition/Conversion Time: To be characterized
  • Programmable Filter: IIR Filter Each channel incorporates a fixed second order anti-aliasing filter and a post filter that has a digitally adjustable -3 dB break point (programmable from 10 Hz to 90 kHz in 10 Hz steps).
  • Common Mode Rejection: 90 dB min. at 60 Hz. Roll off to 50 dB min. at 10 kHz.
  • Common Mode Voltage: Signal voltage plus Common mode voltage is 270 volts. Note: A/D differential inputs must not “float”. Input source must have return path to A/D Return (CH 16-).
  • Output Logic: Bipolar output in two's complement. Bipolar output range from FFFF 8000 max. negative; 0000 7FFF is max. positive (FS) Unipolar output range from 0 to 0000 FFFF (FS) (Voltage Ranges only)
  • ESD Protection: Designed to meet the testing requirements of IEC 801-2 Level 2. (4 KV transient with a peak current of 7.5 A and a Tc of approximately 60 ns).
  • Power: 5 VDC @ 100 mA / 150 mA max. (typ. / max.); ±12 VDC @ 220 mA / 330 mA (typ. / max.)
  • Ground: Channel inputs are differential, referenced to isolated module AGND, (or Common Mode Reference Point (CMRP): CH16(-)) isolated (250 V minimum peak isolation) from system power/ground.
  • Weight: 1.5 oz. (42 g)
Block Diagram

(Click diagram to enlarge)

5/16/2019 7:54:00 AM
5/13/2021 4:01:37 PM
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