PCI-6722 8-Channel 13-Bit Analog Output Device
The PCI-6722 is a high-speed PCI analog output device providing eight 13-bit voltage-output channels. It is designed for simultaneous multichannel waveform generation, stimulus-response testing, deterministic control and electronic sensor simulation.
The device supports a maximum update rate of 800 kS/s, an output range of ±10 V and hardware-timed output operations. It also supplies eight 5 V TTL/CMOS digital I/O lines, two 24-bit counter/timers, digital triggering and external clocking.
Key Features of the PCI-6722
- Eight analog voltage-output channels
- 13-bit output resolution
- Up to 800 kS/s maximum update rate
- Hardware-timed multichannel generation
- ±10 V output range
- ±5 mA maximum output-current drive
- Eight 5 V TTL/CMOS digital I/O lines
- Two 24-bit, 20 MHz counter/timers
- Digital triggers and external sample clock support
- 68-pin VHDCI front connector
- Short-circuit-to-ground protection
- NI-DAQmx software support
PCI-6722 Technical Specifications
| Product Model | PCI-6722 |
|---|---|
| Part Number | 778705-01 |
| Product Type | High-speed analog output device |
| Bus Interface | 3.3 V or 5 V PCI |
| Analog Output Channels | 8 voltage outputs |
| Output Resolution | 13 bits |
| Maximum Update Rate | 800 kS/s |
| Output Range | ±10 V |
| Output Coupling | DC |
| Maximum Current Drive | ±5 mA |
| Output Impedance | 0.1 Ω maximum |
| Digital I/O | 8 TTL/CMOS-compatible lines |
| Counter/Timers | 2 × 24-bit, 20 MHz |
| Front Connector | 68-pin VHDCI |
| Driver | NI-DAQmx |
PCI-6722 Part Number and Accessories
| Item | Part Number | Description |
|---|---|---|
| PCI-6722 | 778705-01 | Eight-channel, 13-bit PCI analog output device |
| 68-Pin VHDCI Cable | Configuration dependent | Connects the device to a compatible SCSI-type terminal accessory |
| SCB-68A | 782536-01 | Shielded screw-terminal block for custom wiring |
| BNC Connection Accessory | Configuration dependent | Provides convenient laboratory BNC signal access |
The PCI-6722 uses a VHDCI connector, which differs from the 68-pin SCSI connector installed on several other 67xx devices. Confirm both ends of the cable before ordering accessories.
13-Bit Multichannel Output Architecture
With eight 13-bit channels, the PCI-6722 provides greater amplitude resolution than the 12-bit PCI-6713 while maintaining a high output update rate. Each output can be assigned its own waveform data and coordinated through a common timing configuration.
The ±10 V range makes the device suitable for common laboratory command voltages, controller simulation and analog stimulus generation.
Externally Clocked Signal Generation
An external clock can control output update timing when the analog waveform must follow another instrument or system clock. Digital triggering allows generation to begin in response to a defined hardware event.
This architecture improves repeatability when the PCI-6722 is combined with digitizers, data acquisition devices, motion hardware or automated test fixtures.
Output Load Considerations
Each analog output is intended to drive voltage-input circuits within its specified current capability. Low-impedance, capacitive or high-current loads may increase settling time or cause the output to reach its current limit.
Use an external buffer or power amplifier when the application requires more than the supported output current. The PCI-6722 should not be treated as a programmable power supply.
PCI-6722 Applications
- Eight-channel waveform generation
- Sensor and transducer simulation
- Power-supply command control
- Stimulus-response testing
- Hardware-in-the-loop validation
- PID and deterministic control
- Automated electronics testing
- Multiphase signal simulation
- Laboratory function generation
- Research and development systems
Hardware-in-the-Loop Signal Simulation
The eight voltage outputs can emulate several sensor or command signals presented to a controller. Software-defined waveforms can reproduce normal operating conditions, ramps, disturbances and fault-related signal levels.
Automated Stimulus Generation
The PCI-6722 can provide repeatable stimulus signals while another device acquires the DUT response. A shared trigger or clock helps maintain a consistent relationship between generation and measurement.
PCI-6722 Installation Workflow
Step 1: Verify the Computer
Confirm that the computer provides a compatible PCI slot and an operating system supported by the selected NI-DAQmx release.
Step 2: Install the Board
Power off the computer, follow ESD procedures and secure the PCI-6722 in the chassis.
Step 3: Detect the Hardware
Install NI-DAQmx and verify device recognition in NI MAX.
Step 4: Connect the VHDCI Cable
Use a cable specifically compatible with the PCI-6722 VHDCI connector. Do not assume that a cable for the PCI-6713 or PCI-6733 will connect directly.
Step 5: Validate the Output
Generate a low-frequency test waveform and verify its amplitude, offset and timing with a properly grounded measuring instrument.
PCI-6722 Troubleshooting
The board is not recognized
Reseat the board, verify PCI compatibility and reinstall or repair NI-DAQmx.
The cable does not fit
Confirm that the device end is a 68-pin VHDCI connection. Other members of the 67xx family may use a physically different SCSI connector.
The output does not reach the programmed voltage
Disconnect the external load and retest. Excessive current demand or incorrect grounding can prevent the channel from reaching the requested voltage.
The waveform edges appear rounded
Check waveform frequency, load capacitance, cable length and device settling characteristics. High-frequency square waves contain harmonics that may exceed the practical analog bandwidth.
Digital input timing is inconsistent
The general-purpose digital lines are not a replacement for buffered, high-speed digital waveform acquisition. Use the counter/timers or dedicated digital hardware when precise digital timing is required.
PCI-6722 Comparison
| Model | Channels | Resolution | Maximum Update Rate |
|---|---|---|---|
| PCI-6713 | 8 | 12 bits | 1 MS/s |
| PCI-6722 | 8 | 13 bits | 800 kS/s |
| PCI-6731 | 4 | 16 bits | 1 MS/s |
| PCI-6733 | 8 | 16 bits | 1 MS/s |
| PCIe-6738 | 32 | 16 bits | 1 MS/s |
The PCI-6722 balances eight-channel capacity with 13-bit resolution. The PCI-6733 provides higher resolution, while newer PCI Express devices may provide more channels and a current platform interface.
PCI-6722 Frequently Asked Questions
How many analog outputs does the PCI-6722 provide?
It provides eight independently programmable voltage outputs.
What is the maximum output rate?
The maximum specified update rate is 800 kS/s. Achievable multichannel rates depend on task configuration and data-transfer conditions.
What is the analog output range?
The supported voltage-output range is ±10 V.
Does the PCI-6722 have analog inputs?
No. It is an analog-output-focused device.
What is its part number?
The standard PCI-6722 part number is 778705-01.
Recommended Related Products
- PCI-6713 Analog Output Device
- PCI-6733 16-Bit Analog Output Device
- PCIe-6738 32-Channel Analog Output Device
- PXIe-6739 Analog Output Module
Request a Quote for the PCI-6722
Contact us for availability, pricing and accessory assistance for the PCI-6722 13-bit analog output device. We can help verify compatible VHDCI cables, terminal blocks and replacement options.
