Keithley DAS-1601 12-Bit Multifunction Board

The Keithley DAS-1601 is a 12-bit multifunction data acquisition board for IBM PC/XT/AT and compatible computers. It provides analog input and output, digital I/O, and high-speed DMA transfer capabilities for rapid data acquisition and control tasks.

## Technical Specifications

**Analog Input**
• Resolution: 12 bits
• Channels: 16 single-ended or 8 differential
• Input ranges: Unipolar 0 to +10V, 0 to +1V, 0 to +100mV, 0 to +20mV; Bipolar ±10V, ±1V, ±100mV, ±20mV
• Programmable gains: 1, 10, 100, 500
• Maximum sampling rate: 100 kS/s
• Input impedance: >25 MΩ
• Input current: 250 nA max (125 nA typical) @ 25°C
• Overvoltage protection: ±35V max (powered); ±20V unpowered
• Temperature coefficient: Gain drift ±50 ppm/°C max; Zero drift ±10 µV/°C ±200 µV/gain (bipolar) or ±10 µV/°C ±50 µV/gain (unipolar)

**Analog Output**
• Channels: 2
• Resolution: 12 bits
• Conversion time: 8 µs max (7.5 µs typical)
• Settling time: 20 µs to 0.01%
• Linearity: ±1/2 bit
• Monotonicity: Guaranteed
• Output drive current: ±5 mA max
• Output impedance: <0.1 Ω

**Digital I/O**
• Lines: 32
• TTL output drive: LOW 0.5V max @ 8.0 mA; HIGH 2.4V min @ -0.4 mA
• TTL input thresholds: LOW 0.8V max; HIGH 2.0V min

## Key Features

• ISA bus interface for direct system integration
• Burst mode timing emulates simultaneous sample-and-hold
• High-speed DMA transfer support
• PIO-12 board compatibility
• Noise performance: 1 count p-p / 0.1 counts rms at gains 1 and 10; 2 counts p-p / 0.2 counts rms at gain 100

## Typical Applications

• Product testing and quality assurance
• Process monitoring and control
• Research and development data acquisition
• Multi-channel analog measurement systems

## Compatibility & Integration

Supports DAS-1600 External Driver and DriverLINX software drivers for Windows 95/98 (ActiveX and DLL-based interfaces).