V200
VXI 16-Bit Sigma-Delta ADC Module

The V200 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 (KSPS) 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.

VXI 16-Bit Sigma-Delta ADC Module: V200

V200 Data Sheet

Supporting Software

Supporting Chassis

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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.

VXI Module Features

  • 16 or 32 Channels of Sigma-Delta ADCs
  • 16-Bit Resolution at 200 KSPS per Channel
  • Programmable Gain per Channel
  • Synchronization between Channels on Multiple Modules
  • On-Board DSP for Limit Checking
  • Internal/External Clock Selection
  • Programmable Internal Clock Rate
  • User Selection of Unified Clocking or 2 Independent Clocks
  • A Phase-Locked-Loop (PLL) Multiplier Allowing
    1X External Clocking
  • AC/DC Coupling
  • 8 or 32 MB Multibuffer Memory Options
  • Communication Ports for TI TMS320 'C40 & 'C44 DSPs
    Output Options
  • Additional Bridge Signal Conditioning Provided by
    V710: Signal Conditioning Termination Panel

VXI Module Ordering Information

V200 Products and Part Numbers
16 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel
V200-AA14
16 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel,
Communication Output Port for TI DSP
V200-AA34
16 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel,
8 MB Multibuffer Memory
V200-AC14
16 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel,
32 MB Multibuffer Memory
V200-AE14
32 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel
V200-BA14
32 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel,
Communication Output Port for TI DSP
V200-BA34
32 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel,
8 MB Multibuffer Memory
V200-BC14
32 Channels, 16-bit Sigma-Delta ADC,
200 KSPS per Channel,
32 MB Multibuffer Memory
V200-BE14