The NI PCI-6723 is a multifunction analog output card for PCI systems designed to generate precise static and dynamic waveforms across 32 independent channels. This device delivers 13-bit resolution analog outputs with update rates reaching 800 kS/s per channel in single-channel mode, scaling to 204 kS/s per channel when all 32 channels operate simultaneously. Output range is ±10 V with 0.1 Ω impedance and 5 mA per-channel current limits.
Beyond analog generation, the PCI-6723 integrates eight 5 V TTL/CMOS digital I/O lines individually configurable as inputs or outputs, plus two 24-bit counter/timers running at a 20 MHz base clock (80 MHz timebase for PWM). These counters support Pulse Width Modulation generation and non-quadrature encoder counting. Digital triggering and external clocking via TTL-compatible signals from PFI enable precise synchronization. The onboard RTSI bus connects to other National Instruments DAQ, motion, and vision hardware.
Technical Specifications
Analog Outputs
• 32 channels, 13-bit resolution
• Output voltage range: ±10 V DC coupled
• Update rate: 800 kS/s (single channel) / 204 kS/s (all 32 channels)
• Output impedance: 0.1 Ω
• Current limit: 5 mA per channel
• Supports square, sine, sawtooth, and complex waveforms
Digital I/O
• 8 channels, 5 V TTL/CMOS compatible
• Individually programmable as inputs or outputs
• Programmed I/O data transfer mode
Counters/Timers
• 2 channels, 24-bit resolution
• Base clock: 20 MHz; PWM timebase: 80 MHz
• Frequency accuracy: ±0.01%
• PWM outputs and non-quadrature encoder support
• Single-use per channel (encoder or PWM, not both)
Triggering & Synchronization
• 7 trigger lines; 1 RTSI clock line
• TTL digital triggers from PFI
• Rising or falling edge selection
• External clock support
– Key Features
• Low output impedance (0.1 Ω) minimizes loading effects
• Flexible counter/timer functionality for timing and PWM control
• RTSI integration for multi-device hardware synchronization
• No analog input capability
– Typical Applications
• Signal generation and waveform synthesis
• PWM control and motor drive systems
• Encoder interfacing and position sensing
• Synchronized multi-channel analog output systems
– Compatibility & Integration
Supports C/C++, Visual Basic, Visual Studio .NET, and LabVIEW development environments. Power requirements: 300 mA @ +3.3 VDC; 1.5 A typical / 3 A maximum @ +5 VDC.
