TEWS TQMC701 8 Single-Ended / Differential A/D Channels, 4 D/A Channels and 16 Digital I/O Channels

Application Information

The TQMC701 is a VITA 93.0 compatible single-width

QMC providing 8 channels of simultaneous sampling

single ended or true differential bipolar analog inputs, 4

channels of simultaneous update analog voltage output

and 16 ESD-protected 5 V tolerant TTL digital I/O lines.

The 16 bit analog input channels support per channel

software configurable input modes and voltage ranges.

Each channel can be operated in bipolar single-ended,

unipolar single-ended and bipolar differential mode. In the

single-ended modes it offers software selectable input

voltage ranges of 0-5 V, 0-10 V, 0-12.5 V, ±2.5 V, ±5 V,

±6.25 V, ±10 V and ±12.5 V. In differential mode the input

voltage ranges are selectable between ±5 V, ±10 V,

±12.5 V and ±20 V. Sampling rate for all channels active is

up to 1 Msps.

The 16 bit analog output channels support per channel

software configurable output voltage ranges of 0-5 V, 0

10 V, 0-10.8 V, ±5 V, ±10 V or ±10.8 V. The conversion

time is typ. 10 μs and the DAC outputs are capable to

drive a load of 2 kΩ, with a capacitance of up to 4000 pF.

All 16 digital I/O lines are ESD-protected and 5 V-tolerant.

Every I/O line is individually programmable as input or

output if not used for external synchronization. TTL I/O

lines can be set to high, low, or tristate.

Every TQMC701 is factory calibrated. The calibration

information is stored in a user-accessible on-board serial

EEPROM individual to every module. The correction data

values may be used to perform a hardware correction for

A/D channels per input range and D/A channels per output

range during functional operation.

In addition, there is a temperature sensor on every module

to allow supervisory and data temperature coherence

evaluation.

The TQMC701 provides different operation modes to

perform manual and automatic A/D and D/A conversions.

For automatic conversions there are dedicated A/D and

D/A sequencer units. These include on-board data buffer

and DMA controller for A/D data transfer, D/A data fetch

and conversion rate generators.

Sequencers provide optionally a Frame Mode for repetitive

frames of A/D and D/A conversions upon an internal or

external trigger signal event.

Conversion clock (conversion rate) and frame trigger

signals may be generated on-board for internal use.

Optionally these can be provided via the I/O connector if

the card is operating as a master card in a Multi-Board

configuration (externally synchronization). The conversion

clock (conversion rate) and frame trigger signals may also

be sourced externally to be used internally.

The TQMC701 is available as air cooled and conduction

cooled variant.