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PAS 9818/AO, 8 Channel, 16-Bit Programmable Current Output Card

Links to printable product info:

• Product Manual
• Hi-resolution Product Image (right click, select "Save Picture As")

The PAS 9818/AO provides eight programmable current output channels with sixteen bit resolution on a 6U VME card. Each channel consists of a high speed Digital-to-Analog Converter (DAC), followed by a high power operational amplifier. The output amplifier is configured to provide an output current that is proportional to the output voltage from the DAC. The output current range is positive to negative forty mAmps. Each amplifier provides a flag indicator that sets when the amplifier is in an over-current fault condition. Power to the output amplifiers can either be provided externally, or by on-board DC-to-DC converters.

All of the output channels and the external power supply connections can be terminated on the P2 connector of the VME backplane. A DB37 connector mounted through the front panel is available as an option for terminating the output and power supply signals.

The card can be used in VME systems with A16, A24, or A32 addressing, and data writes of 16 and 32 bits are supported. DIP switches are used to configure the width of the address bus, and the instruction type specifies the data bus width. A board identifier PROM, control and status register, and a 32-bit test register fill out the register set.

Card Features: PAS 9818/AO

• 8 independent DAC channels with 16 bit programmable current outputs

• +/- 40 mAmp current output

• Binary Two’s Complement data format

• DAC’s reset to zero during power up or software reset

• Output slew rate of 1 mA per uSec

• Settling time of 100 uSec to 0.1% FSR

• Each amplifier provides a flag signal that indicates the amplifier is in a fault condition. These signals can be accessed through software, by reading the flag register.

• Output signals and power supply terminate on P2 backplane connector, or on a DB37 connector at the front panel

• VME 6U form factor; 233 mm x 160 mm card size

• VME access: D32, D16, A32, A24, A16 Slave

• No VME Interrupts

• VME SYSFAIL asserts on power up, jumper selectable

• Board Identifier PROM (Board ID is VMEIDPAS9818AOA0)

• Pass and Fail LED’s on the front panel

• Simultaneous DAC update feature is program selectable.

• Loop back test registers allow verification of the VME bus interface.

• 32-bit VME interface allows two channels to be written with one transfer and provides twice the data transfer rate of 16 bit interfaces. 16 bit VME transfers are also supported.

• DAC’s are powered by the +/- 12 Volts from the VME bus, or by on-board DC-to-DC converters.

• Output amplifiers can be powered by external power supplies or by on-board DC-to-DC converters

• Operating temperature range 0 to 55 deg. C.

Contact us for current pricing.

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