The Keithley KPCI-1801HC is a high-performance multifunction data acquisition board for PCI bus systems. It delivers 32 differential or 64 single-ended analog input channels, 2 analog output channels, and digital I/O capabilities. Engineered for demanding measurement and control applications, it combines high-speed sampling, flexible triggering, and bus-mastering DMA to support continuous acquisition of large data volumes with minimal CPU overhead.
## Technical Specifications
**Analog Input**
• Channels: 32 differential or 64 single-ended (software configurable)
• Resolution: 12 bits
• Throughput: 333 kS/s single channel; 312.5 kS/s aggregate multichannel
• Conversion rate range: 4.32 samples/hour to 333 kS/s
• Input range: Software selectable via channel gain queue
• Programmable gains: 1, 5, 50, 250
• Input impedance: >100 MΩ || ≤90 pF (all gains)
• Input overvoltage protection: ±15 V continuous (powered or unpowered)
• Input bias current: ±40 nA @ 25°C; ±60 nA over operating range
• Linearity: ±1 LSB integral maximum
• A/D FIFO buffer: 2048 samples
• Channel gain queue: 64 entries
**Analog Output**
• Channels: 2
• Resolution: 12 bits
• Output range: ±10 V
• Accuracy: ±5 mV typical (high impedance)
• Output impedance: 4 Ω
• Output current: ±5 mA maximum
• Maximum capacitive load: 100 µF
• D/A FIFO buffer: 16 samples
**Data Acquisition**
• Transfer modes: DMA (bus master), interrupt, polled
• Triggering: Pre-trigger, post-trigger, about-trigger; external hardware trigger and gate inputs
• Clocking: External pacer clock or onboard time base
• Burst mode: Programmable acquisition with configurable intervals
## Key Features
• 32-bit bus-mastering DMA for continuous large-volume data acquisition
• Multiple 37-pin D-type male connectors for external accessory integration
• High input impedance (>100 MΩ) minimizes loading effects
• Programmable gains support signal conditioning across wide dynamic ranges
• Flexible triggering and clocking enable synchronized multichannel measurements
## Typical Applications
Process monitoring, transient capture, multichannel signal analysis, industrial control, and laboratory measurement systems requiring simultaneous analog sampling with digital synchronization.
## Compatibility & Integration
PCI bus interface. Compatible with DriverLINX software; refer to DriverLINX documentation for KPCI-1800 Series configuration.
