ADC8701/8714
8/16-Channel 16-Bit ADC
IndustryPack®
The Newwood Solutions IP-ADC-8701/8714 is an Industry Pack® module which provides 8 or 16 channels of simultaneously sampled analogue digitisation and programmable gain ranges with the following characteristics:-
• This module can be supplied with either 8 (8701) or 16 (8714) independent channels (one ADC per input).
• True full differential inputs.
• High input impedance - 1Gohms.
• Over voltage +/-25V.
• Hytec ADC8401 register superset and connection pin layout.
• The ADC8701 can be supplied as direct plugin replacement for Hytec ADC8401 seen by software as an 8401.
• 16 bits resolution – 16 bits no missing codes.
• 14 bits accuracy.
• Up to 200KHz sampling rate with a conversation time of 5µs
• On-board sample clock programmable to 200kHz.
• On board RAM Memory 1M x 16 bits
• 128K conversions per channel 8 channels (8701)
• 64K conversions per channel 16 channels (8714)
• Programmable full-scale resolution all inputs +/-10V or +/-5V.
• Front-end programmable gain instrumentation amplifiers giving gains of 1, 2, 4 and 8.
• Active low pass filter.
• On-board calibration by FPGA firmware using stored offset and gain data.
• Gain drift - 2ppm per deg C (typ).
• Offset drift - +/-3.5uV/degC (typ).
• +/-10V offset error - +/-3LSBs with firmware calibration (+/- 2.5mV without calibration).
• +/-5V offset error - +/-4LSBs with firmware calibration (+/- 2.5mV without calibration).
• +/-10V gain error - +/-3LSBs with firmware calibration (+/- 0.75% FS without calibration).
• +/-5V gain error - +/-4LSBs with firmware calibration (+/- 0.75% FS without calibration).
• Ext sample clock input.
• Ext trigger input
• Aperture Delay 5 ns typ
• Aperture Delay Matching 250 ps typ
• Aperture Jitter 50 ps typ
• ADC voltage reference drift 1.0ppm/oC (max)
• Identification PROM holds Board type, Serial number, PCB and firmware issues
• 8/32MHz IP system clock operation.
• Field upgradeable firmware via IP bus or JTAG port.
• EPICS and ASYN driver support.
• System to plant isolation to 100V when externally powered by DC/DC converter option.
• PCB temperature measurement via on-board chip.
• Ability to set via jumpers the functionality of the unit to give compatibility with ADC8401 and ADC8414 units.
Size: Single width Industry Pack 1.8ins x 3.9 ins
Operating temp: 0 to 45 deg C ambient
Number of channels: 8 (8701) or 16 (8714)
ADC resolution: 16 bits
Range: +/-10V or +/-5V full scale (+ve input referred to –ve input)
Overvoltage: +/-25V
Bandwidth (-3dB): 125KHz
Throughput: 200KHz
SNR: ADC Signal-to-Noise 90dB(min) 91.5dB (typ)
SINAD: ADC Signal-to-Noise + Distortion (SINAD) 87dB(min) 89.5dB (typ)
Isolation: 100V via opto-isolators (if externally powered)
ADC device: TI ADS8556
Data format:16 bits straight binary
Memory: 1M x 16 bits
8 channels gives 128K conversions per channel.
Power:
+5V @ 200mA typical
+12V @ 230mA typical when switched to internal
-12V @ 120mA typical when switched to internal
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