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
- INL (Linearity): 0.05% FS range over temperature
- Gain Error: ±0.25% FS range
- Offset Error: ±0.02% FS range
- 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: 5.5 μs at 200 kHz sampling rate. See manual for conversion time at lower sample rates
- Programmable Filter: Each channel incorporates a fixed second order anti-aliasing filter (30 kHz bandwidth) and a post filter that has a digitally adjustable -3 dB break point programmable up to 90 kHz.
- 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 @ 530 mA / ±12 VDC @ 185 mA (pending verification)
- Signal-to-Noise Ratio: TBD
- 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)
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