V200-AA11 Kinetic Systems 16-Channel 16-Bit Sigma-Delta ADC

The Kinetic Systems V200 16 or 32-Channel 16-Bit Sigma-Delta ADC is a single-width, C-size, register-based, VXIbus module that provides 16 or 32-channels of 16-bit resolution analog-to-digital conversion at sample rates up to 200 ksamples/s per channel. The sigma-delta architecture provides inherent filtering and synchronous sampling without the need for sample/hold amplifiers or sophisticated analog filters. A simple, 3-pole pre-filter assures no frequency aliasing. The module is divided into two channel groups, allowing one half of the channels to be operated at one clock rate, while the other half are operated at another clock rate. The groups can also be combined, operating the entire module at one clock rate.

Each channel has independently programmable input spans from ±10 mV to ±10 V provided by an instrumentation amplifier front end. AC/DC coupling can also be programmed on a channel-by-channel basis. Channel calibration and self-test are performed automatically on command by the embedded DSPs. These DSPs also allow programmable level and slope limit checking.

Clocking for the ADCs may be provided by an internal programmable clock, or externally via the VXI trigger lines or via the front panel Clock In connector. A phase-locked loop (PLL) generates the required 64-times oversampling clock needed by the ADCs for these external clock sources. The entire module must be operated at the same clock rate to use the 1X PLL clock.

The V200 provides an onboard ping-pong interface to the VXIbus. The module is also available with a multibuffer memory or a communication port interface. The multibuffer permits configuration for continuous operation or for transient capture. In transient capture mode, the number of pre- and post-trigger samples may be programmed, with the trigger source being selectable from either on-board limit checking, the VXIbus trigger lines, or the front panel Trigger In connector. The communication interface option can move the data as it is acquired to an external TI TMS320, ‘C40 or ‘C44 Digital Signal Processor (DSP). This interface includes two communication ports, one for each V200 channel group.