Comprehensive Product Summary – ADLINK DAQe‑2501 PCI Express Data Acquisition Card

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### 1. Product Overview

Product Name: DAQe‑2501
Model Number: DAQe‑2501
Series: PXI/DAQ/DAQe‑2500 Series (NuDAQ‑2500 family)
Article Number: DAQe‑2501
Manufacturer: ADLINK Technology Inc.
Product Type: PCI Express multifunction data acquisition (DAQ) card with analog output and input, digital I/O, and counter/timer functions.
Form Factor: PCI Express x1 lane, plug‑and‑play, 68‑pin VHDCI connector interface.
Intended Use: High‑performance analog waveform generation, data acquisition, and control applications in laboratory, industrial, and embedded systems.

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### 2. Key Features

- High‑speed analog output: 4 channels, 12‑bit resolution, up to 1 MS/s simultaneous update rate.
- Analog input capability: 8 single‑ended channels, 14‑bit resolution, up to 400 kS/s sampling rate.
- Fully auto‑calibrating architecture: Internal 14‑bit calibration DAC with ±2 ppm/°C reference stability.
- Programmable voltage ranges: Bipolar ±10 V or unipolar 0–10 V, with optional external reference per channel.
- Hardware‑based arbitrary waveform generation: Onboard 8 k‑sample D/A FIFO buffer for continuous or iterative waveform output.
- Scatter‑gather DMA: High‑throughput, low‑CPU‑load data transfer for both A/D and D/A operations.
- Digital I/O: 24 TTL‑compatible programmable lines (Intel 8255 PIO compatible).
- Timer/Counter: Two 16‑bit general‑purpose up/down counters with 40 MHz internal or up to 10 MHz external clock.
- Triggering: Software, external digital, external analog, or SSI (System Synchronization Interface) triggers; supports post‑trigger, delay‑trigger, and retrigger modes.
- Synchronization: Multi‑card synchronization via SSI bus or PXI trigger bus.
- Auto‑calibration: Internal precision 5 V reference, ±2 ppm/°C, with software‑controlled calibration constants stored in EEPROM.
- Software ecosystem: Drivers and SDKs for Windows 7/8 x86/x64 and Linux; supports LabVIEW®, MATLAB®, C/C++, Visual Basic, and .NET.
- Utility software: AD‑Logger for data logging and configuration.
- Plug‑and‑play PCI Express interface: Automatic resource configuration, no jumpers required.
- Environmental robustness: 0 °C – 55 °C operating range, 5 – 95 % RH non‑condensing.

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### 3. Technical Specifications

Analog Output (AO)
- Channels: 4 voltage outputs
- Resolution: 12 bits
- Output ranges: 0 – 10 V, ±10 V, 0 – AOEXTREF, ±AOEXTREF
- Maximum update rate: 1 MS/s
- Slew rate: 20 V/µs
- Settling time: 3 µs to ±0.5 LSB
- Offset error: ±8 mV (max)
- Gain error: ±0.04 % of full scale
- Output drive: ±5 mA (max)
- Load stability: Stable for passive loads ≤ 1500 pF
- Output coupling: DC
- Protection: Short‑circuit to ground
- FIFO buffer: 8 k samples
- Data transfer: Programmed I/O or scatter‑gather DMA
- Trigger sources: Software, external digital/analog, SSI bus
- Trigger modes: Post‑trigger, delay‑trigger, repeated trigger

Analog Input (AI)
- Channels: 8 single‑ended
- Resolution: 14 bits, no missing codes
- Sampling rate: 400 kS/s (max)
- Input ranges: ±10 V (bipolar), 0 – 10 V (unipolar)
- Offset error: ±4 mV
- Gain error: ±0.1 % of FSR
- Input impedance: 1 GΩ // 6 pF
- Coupling: DC
- Overvoltage protection: ±30 V continuous (power on), ±15 V (power off)
- FIFO buffer: 2 k samples
- Data transfer: Polling or scatter‑gather DMA
- Trigger sources: Software, external digital/analog, SSI bus
- Trigger modes: Post‑trigger, delay‑trigger, repeated trigger

Digital I/O
- Channels: 24 (8255 programmable I/O)
- Logic levels: 5 V TTL compatible
- Transfer mode: Programmed I/O

Timer/Counter
- Channels: 2 independent up/down counters
- Resolution: 16 bits
- Logic levels: 5 V TTL compatible
- Base clock: 40 MHz internal; external clock ≤ 10 MHz

General and Physical
- Auto‑calibration: Yes (+5 V reference, ±2 ppm/°C)
- Dimensions: 168 mm × 107 mm (6.55 in × 4.17 in) excluding connectors
- Connector: 68‑pin VHDCI female
- Power requirements: +3.3 V @ 0.78 A, +12 V @ 0.66 A (typical)
- Operating temperature: 0 °C – 55 °C (32 °F – 131 °F)
- Storage temperature: –20 °C – 70 °C (–4 °F – 158 °F)
- Humidity: 5 – 95 % non‑condensing

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### 4. Functionality

The DAQe‑2501 is a multifunction PCI Express data acquisition card that combines high‑speed analog output and input with digital I/O and timing functions. It operates as a hardware‑timed waveform generator and data acquisition device for precise signal generation and measurement.

Operation Principle:
- The card uses dedicated DAC and ADC subsystems controlled by FPGA logic. Analog outputs are updated synchronously across channels within a group to ensure phase‑aligned waveform generation. Analog inputs sample simultaneously with programmable trigger and timing control.
- Scatter‑gather DMA enables continuous data streaming between onboard FIFO buffers and host memory without CPU intervention.
- The System Synchronization Interface (SSI) allows multiple DAQe‑2500 series cards to operate in synchronized mode for multi‑channel or distributed measurements.

Typical Applications:
- Arbitrary waveform generation and signal simulation
- Transient signal measurement and analysis
- Automated test equipment (ATE)
- Process control and industrial automation
- Biomedical and biotech instrumentation
- Automotive and aerospace testing
- Laboratory and educational research systems

Compatibility:
- PCI Express x1 slot (3.3 V or 5 V signaling)
- Supported OS: Windows 7/8 (32/64‑bit), Linux
- Supported software: LabVIEW®, MATLAB®, Visual Studio .NET, C/C++, Visual Basic

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### 5. Components & Accessories

Included Items:
- DAQe‑2501 PCI Express DAQ card
- ADLINK All‑in‑One software CD with drivers and utilities
- Software Installation Guide
- User’s Manual (PDF and print version)

Optional Accessories:
- DIN‑68S‑01: 68‑pin DIN‑rail terminal board
- ACL‑10568‑1: 68‑pin shielded cable for VHDCI connection
- ACL‑SSI‑2/3/4: SSI bus cables for multi‑card synchronization

Connectors:
- Single 68‑pin VHDCI female connector (AMP‑787254‑1) for analog I/O, digital I/O, and timing signals.
- Pin assignments include AO (0–3), AI (0–7), AOEXTREF, EXTATRIG, GPTC signals, AFI inputs, and 8255 PIO ports A/B/C.

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### 6. Installation & Setup

Requirements:
- PCI Express x1 slot on host PC
- +3.3 V and +12 V power rails available
- Supported operating system and driver installation from ADLINK CD

Mounting and Handling:
- Handle on a grounded anti‑static mat with ESD protection.
- Insert the card into an available PCIe slot and secure with a retaining screw.
- Connect external signals via the 68‑pin VHDCI cable to a terminal board.

Configuration:
- Plug‑and‑play PCIe resource allocation (no jumpers or switches).
- Automatic IRQ and I/O address assignment by system BIOS.
- Use ADLINK’s PCI_SCAN utility to verify system configuration.

Software Setup:
- Install drivers from the ADLINK CD before inserting the card for Windows systems.
- Linux users compile and install the D2K‑DASK/X driver package.
- Verify installation using AD‑Logger or sample applications provided.

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### 7. Performance & Capabilities

Analog Output Performance:
- 1 MS/s update rate per channel enables generation of high‑frequency waveforms up to 500 kHz bandwidth.
- 12‑bit resolution provides 4096 discrete output levels with ±10 V range.
- 20 V/µs slew rate and 3 µs settling time ensure low distortion and fast response.
- Hardware FIFO and DMA allow continuous streaming without data loss.

Analog Input Performance:
- 14‑bit resolution (16 384 codes) with 400 kS/s sampling rate supports medium‑speed data logging and signal analysis.
- ±10 V input range with 1 GΩ impedance minimizes loading effects.
- Programmable trigger modes enable precise timing and event‑based acquisition.

Digital I/O and Timing:
- 24 programmable lines for control and status monitoring.
- Two 16‑bit counters support frequency measurement, pulse generation, and event counting up to 10 MHz.
- Internal 40 MHz timebase provides fine timing resolution for waveform and trigger operations.

Efficiency and Limitations:
- Continuous waveform generation limited by 1 MS/s update rate and FIFO depth (8 k samples).
- Analog input limited to 400 kS/s aggregate sampling rate.
- Output drive limited to ±5 mA; use external buffer for heavier loads.

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### 8. Standards & Compliance

- Bus Interface: PCI Express x1 compliant (DAQe‑2500 series)
- PXI Specification: Rev 2.2 compliant (for PXI variants)
- Digital Logic Levels: TTL/CMOS compatible I/O
- Environmental Compliance: Designed for industrial temperature range and humidity conditions.
- Safety and EMC: Conforms to ADLINK manufacturing and quality standards for industrial DAQ hardware.
- Software Support Standards: LabVIEW PnP driver compliant; ActiveX and DLL interfaces for Windows and Linux.

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### 9. Additional Information

Calibration and Maintenance:
- Factory‑calibrated before shipment; auto‑calibration function compensates for offset and gain errors without external equipment.
- Recommended warm‑up time: 15 minutes before calibration.
- Calibration constants stored in EEPROM (user can save up to three sets for different environments).

Warranty and Support:
- Standard two‑year limited warranty (one year for China).
- Covers manufacturing defects and hardware failures under normal use.
- Excludes damage from misuse, improper installation, or unauthorized repair.
- RMA procedure available via [http://rma.adlinktech.com/policy](http://rma.adlinktech.com/policy).

Technical Support Contacts:
- ADLINK Technology Inc. (Taiwan): service@adlinktech.com  |  +886‑2‑8226‑5877
- ADLINK Technology America: info@adlinktech.com  |  +1‑866‑4‑ADLINK
- ADLINK Europe: emea@adlinktech.com  |  +49‑211‑4955552
- Regional offices: Singapore, India, Beijing, Shanghai, Shenzhen (contact emails available on ADLINK website).

Software Updates and Utilities:
- Drivers and SDK updates available from [www.adlinktech.com](http://www.adlinktech.com).
- AD‑Logger utility for data logging and diagnostics.
- DAQ‑LVIEW PnP for LabVIEW integration.
- D2K‑DASK and D2K‑DASK/X libraries for Windows and Linux programming.
- D2K‑OCX ActiveX controls and DAQBench for graphical application development.

Maintenance Guidelines:
- Operate within specified temperature and humidity limits.
- Avoid exposure to static discharge and mechanical shock.
- Periodically verify calibration accuracy using auto‑calibration utility.
- Store in anti‑static packaging at –20 °C to 70 °C when not in use.

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### Summary

The ADLINK DAQe‑2501 is a high‑performance PCI Express multifunction data acquisition card designed for precise analog waveform generation and measurement. It offers 4 channels of 12‑bit analog output at 1 MS/s and 8 channels of 14‑bit analog input at 400 kS/s, complemented by 24 digital I/O lines and two 16‑bit timers/counters. With hardware‑based waveform generation, scatter‑gather DMA, and auto‑calibration, the DAQe‑2501 delivers high accuracy and low latency for industrial and scientific applications. Its comprehensive software support and synchronization capabilities make it a versatile solution for test and measurement, automation, and signal processing systems.