Tews Technologies Adds PMC with 32 Ch. ADC, 16 Ch. DAC, 8 Ch. Digital I/O

March 8, 2018 ECD Staff
 

Tews increases its product portfolio of PMC Modules with the introduction of the TPMC533, a standard single-wide PCI Mezzanine Card (PMC) compatible module designed for industrial, COTS, and transportation applications. The TPMC533 provides 32 channels of simultaneous sampling true differential bipolar 16-bit analog input, 16 or no channels of simultaneous update single-ended unipolar/bipolar 16-bit analog output and 8 channels of tri-state 5V-tolerant TTL digital input/output.

All signals are accessible through a HDRA100 type front I/O connector. The PMC-Connectors P11 and P12 provide access to the control logic via a 32-bit 33MHz PCI interface.

The ADCs offer true differential inputs with software selectable ±5V and ±10V bipolar input voltage ranges (one common setting for all eight channels of each ADC). The maximum sample rate of the ADCs is 200kSPS and they offer an oversampling capability with a digital filter.

The DACs offer software selectable 0-5V, 0-10V, 0-10.8V, ±5V, ±10V and ±10.8V output voltage ranges (individual setting for each of the four channels of each DAC). The settling time is typically 10¼s and the DAC channels are capable to drive a load of 2k©, with a capacitance up to 4000pF.

Each TPMC533 is factory calibrated. The correction data is stored in an on-board serial EEPROM unique to each PMC module. These correction values can be used to perform a hardware correction of every analog-to-digital and digital-to-analog conversion. Additionally, measurement data read out of a temperature sensor on-board can be used to compensate temperature dependent errors.

The TPMC533 provides two sequencers, one for A/D Conversions and another one for D/A Conversions. To perform periodic simultaneous conversions the conversion rates are programmable and can be output to other modules on PMC Back I/O Connector P14 or Front I/O Connector DIO pins for synchronization purposes. The TPMC533 can also operate as a target which means that the conversion rates can be sourced from P14 or Front I/O, created by another module.

A Frame Trigger signal, which can also either be generated by the TPMC533 and output on P14/Front I/O or generated by other modules and input from P14/Front I/O, can be used to synchronize ADC frames and DAC frames.

The signals on PMC Back I/O Connector P14 are ESD protected and driven or read by tri-state 5V-tolerant TTL buffers.

The TPMC533 provides input and output FIFOSs to be able to collect ADC frames and to output DAC frames. Data transfer on the PCI bus is handled by TPMC533 initiated block transfer mode DMA cycles with minimum host/CPU intervention.

The 8 Digital TTL tri-state I/O lines with 4.7k& pull resistors are ESD protected. The voltage, the pull resistors are connected to, is programmable by software and can be 3.3V, 5V, GND or floating level (one common setting for all eight Digital I/Os).

All 8 DIOs can be programmed to have their Digital I/O transmitters enabled or disabled individually per I/O line. The Digital I/O receivers are always enabled, so each DIO level can always be monitored and can generate an interrupt, triggered on rising edge, on falling edge or both. Additionally, a debounce filter can be configured to eliminate bounce on the Digital I/O lines.

The TPMC533 operates from -40°C to +85°C. In order to support long term programs, the TEWS modules have a 5 year warranty.

Extensive software support for major operating systems such as Windows, Linux, VxWorks, Integrity and QNX is available.

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