AP226: 12-bit DAC Module

AP226: 8 isolated voltage outputs, 12-bit DAC module description

The AP226 outputs analog voltage signals to drive up to 8 devices. When used with a carrier that holds four AcroPack modules, up to 32 voltage outputs can be obtained from a single card cage slot.

Each output channel has its own 12-bit D/A converter (DAC). Individual DACs are faster, and they eliminate glitches typically caused by the re-acquisition process of sample and holds found on multiplexed output boards.

Individual channels also have double-buffered data latches. You can select to update each output when it is written to, or to update all outputs simultaneously. Simultaneous outputs better simulate linear movements in motion processes.

The AP226 supports 6 independent software selectable output ranges plus capabilities to monitor the status of each output.

Designed for COTS applications these analog output modules deliver high-density, high-reliability, and high-performance at a low cost.

AcroPack modules are RoHS compliant and ideal for military, defense, automation, aerospace, scientific, and development labs industries.

The AP226 modules are 70mm long, 19.05mm longer than the full-length mini PCIe card. The board’s width is the same as mPCIe board and use the same mPCIe standard board hold down standoff and screw keep out areas.

A down-facing 100 pin Samtec connector will mate with the carrier card. Fifty of these signals are available as field I/O signals.

Performance Specifications

Analog Output

Output configuration: 8 isolated bipolar/unipolar.
D/A Resolution: AP226-8E-LF: 12 bits.
Output ranges: Unipolar: 0V to 5V, 0V to 10V. BiPolar: -2.5V to 7.5V, ±-3V, ±5V, ±10V.
Settling time: 9uS – 20V step to 1 LSB at 12-bit resolution. 7.5uS – 10V step to 1 LSB at 12-bit resolution.
Maximum throughput rate: Outputs can be updated simultaneously or individually. One channel: 7.5μS/conversion. Eight channels simultaneously: 17μS/8 channels.
Calibrated system accuracy:  Linearity error: ±0.5 LSB. Offset error: ±0.0625 LSB. Gain error: ±0.0625 LSB. Total error: ±0.625 LSB (±0.0152% FSR) maximum.
Data format (left–justified): Straight Binary or Two’s Complement.
Output at reset: 0 volts.
Output current: 10mA (maximum). This corresponds to a minimum load resistance of 1K ohms with a 10V output.
Short circuit protection: Indefinite at 25°C.
Alarm function: Software readable for brownout, short-circuit and temperature exceeding 150 °C conditions.

PCI Express Base Specification

Conforms to PCIe base specification Revision 2.1.
Lanes: 1 lane in each direction.
Bus Speed: 2.5 Gbps (Generation 1).
Memory: 4k space required.1 base address register.

Environmental

Operating temperature: -40 to 70°C. -40 to 85°C. (requires an AcroPack heatsink conduction-cool kit)
Storage temperature: -55 to 150°C.
Relative humidity: 5 to 95% non-condensing.
MTBF: Contact the factory.
Power: 3.3V DC ±5%: 400mA typical, 480mA maximum. 12V DC isolated ±5%: 70mA typical. -12V DC isolated ±5%: < 10mA typical. See user manual for specifics.

Physical

Length: 70mm.
Width: 30mm.

Additional information