Comprehensive Product Summary: AD12-16U(PC)EH AT AD Card 1MS/s 12 Bit 16SE/8DI 128kW FIFO

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### 1. Product Overview

Product Name: AT AD Card 1MS/s 12 Bit 16SE/8DI 128kW FIFO
Model: AD12-16U(PC)EH
Article Number: AD12-16U(PC)EH
Series: AD12 Series (ISA Bus Analog-to-Digital Conversion Cards)
Manufacturer: Contec Co., Ltd.
Product Type: ISA Analog-to-Digital (A/D) Conversion Card
Category: Data Acquisition (DAQ) Hardware / Industrial Measurement Interface

The Contec AD12-16U(PC)EH is a high-performance ISA-bus analog-to-digital (A/D) conversion card designed for precise, high-speed data acquisition in industrial, laboratory, and embedded computing environments. It integrates a 12-bit A/D converter capable of sampling rates up to 1 mega-sample per second (1 MS/s), supported by a large 128 k-word FIFO buffer for efficient data handling. The card supports both single-ended and differential input configurations, offering 16 single-ended (SE) or 8 differential (DI) analog input channels, expandable to 32 SE or 16 DI channels with an optional extension module.

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### 2. Key Features

- High-Speed Sampling:
Equipped with an AD1671 12-bit A/D converter, the card achieves a maximum sampling rate of 1 MS/s, enabling accurate capture of fast analog signals.

- Large FIFO Buffer:
Integrated 128 k-word FIFO (First-In-First-Out) memory supports continuous high-speed data acquisition without CPU overload. The buffer can also operate as a ring buffer for continuous streaming applications.

- Intelligent Sampling Control:
Features a dedicated ASIC for intelligent sampling management, ensuring stable and efficient data throughput even under high system load.

- Flexible Input Configuration:
Supports 16 single-ended (SE) or 8 differential (DI) analog input channels. Expandable to 32 SE / 16 DI channels using the optional ATUH-16(PC) extension unit.

- Multiple Input Voltage Ranges:
Selectable analog input ranges include ±2.5 V, ±5 V, 0–10 V, and 0–5 V, allowing compatibility with a wide variety of sensors and signal sources.

- Integrated D/A Output:
Includes 1 channel of 12-bit D/A output with selectable output ranges of ±10 V, 0–10 V, or ±5 V, and a conversion time of 6 µs.

- Digital I/O Support:
Provides 4 TTL-level digital inputs and 4 TTL-level digital outputs, enabling control and synchronization with external devices.

- ISA Bus Interface:
Designed for ISA bus systems, supporting DMA channels 5, 6, and 7 and IRQ lines 5, 7, 9–12, and 15 for flexible system integration.

- Compact Form Factor:
Standard ISA card dimensions of 174 mm × 122 mm, suitable for installation in industrial PCs and legacy systems.

- Robust Connectivity:
Equipped with a 37-pin female D-Sub connector for analog and digital signal interfacing.

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### 3. Technical Specifications

General Specifications:
- Bus Interface: ISA (AT bus)
- A/D Converter: AD1671, 12-bit resolution
- Sampling Rate: Up to 1 MS/s (1 million samples per second)
- FIFO Memory: 128 k-word (expandable or configurable as ring buffer)
- ASIC: Integrated for intelligent sampling control

Analog Input:
- Number of Channels: 16 SE / 8 DI (expandable to 32 SE / 16 DI with ATUH-16(PC))
- Input Voltage Ranges: ±2.5 V, ±5 V, 0–10 V, 0–5 V
- Input Type: Single-ended or differential (software or jumper selectable)
- Resolution: 12 bits
- Input Impedance: Typically high (≥1 MΩ)
- Sampling Method: Successive approximation
- Accuracy: ±(1 LSB + 0.05% of full scale) typical
- Common Mode Rejection: Optimized for differential mode operation

Analog Output:
- Channels: 1
- Resolution: 12 bits
- Output Voltage Ranges: ±10 V, 0–10 V, ±5 V
- Conversion Time: 6 µs
- Output Drive Capability: ±5 mA typical

Digital I/O:
- Digital Inputs: 4 channels, TTL-level
- Digital Outputs: 4 channels, TTL-level
- Logic Levels:
- Input high: ≥2.0 V
- Input low: ≤0.8 V
- Output high: ≥2.4 V
- Output low: ≤0.4 V

Interface & Control:
- DMA Channels: 5, 6, 7 (selectable)
- Interrupt Lines (IRQ): 5, 7, 9, 10, 11, 12, 15 (selectable)
- Connector: D-Sub 37-pin female
- Board Dimensions: 174 mm (L) × 122 mm (H)
- Weight: Approx. 200 g (typical)
- Power Requirements: +5 V DC (from ISA bus), typical consumption <1 A

Environmental Conditions:
- Operating Temperature: 0 °C to +50 °C
- Storage Temperature: –20 °C to +70 °C
- Humidity: 10–90% RH (non-condensing)
- Cooling: Passive (no fan required)

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### 4. Functionality

The AD12-16U(PC)EH functions as a high-speed analog-to-digital interface card for ISA-based computer systems. It converts analog voltage signals from sensors, transducers, or other analog sources into digital data for processing, analysis, or control applications.

Operation Principle:
1. Analog signals are input through the D-Sub 37 connector.
2. The onboard multiplexer selects the active channel (single-ended or differential).
3. The AD1671 12-bit converter digitizes the signal at up to 1 MS/s.
4. The digital data is stored in the 128 k-word FIFO buffer.
5. Data is transferred to system memory via DMA or interrupt-driven I/O.
6. Optional D/A output can generate analog control signals based on processed data.

Use Cases and Applications:
- Industrial process monitoring and control
- Laboratory data acquisition and instrumentation
- Vibration and waveform analysis
- Automated test equipment (ATE)
- Embedded control systems
- Signal recording and playback
- Sensor calibration and diagnostics

Compatibility:
- Compatible with ISA-bus industrial PCs and legacy AT systems.
- Supports integration with Contec’s software drivers and SDKs for Windows and DOS environments.
- Expandable with optional ATUH-16(PC) module for additional input channels.

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### 5. Components & Accessories

Included Components:
- AD12-16U(PC)EH ISA card
- User manual and installation guide
- Driver and utility software (on disk or downloadable)
- D-Sub 37-pin female connector interface

Optional Accessories:
- ATUH-16(PC): Channel expansion unit providing an additional 16 SE or 8 DI inputs (total 32 SE / 16 DI).
- Shielded Cable Assemblies: For noise-resistant analog signal transmission.
- Terminal Boards: For easy wiring and signal distribution.
- Mounting Brackets: For secure installation in industrial enclosures.

Connectors:
- Analog/Digital I/O Connector: D-Sub 37-pin female
- Pin Assignments: Include analog input channels, D/A output, digital I/O lines, ground, and reference voltage pins.

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### 6. Installation & Setup

System Requirements:
- ISA bus slot (full-size or half-size compatible)
- +5 V DC power supply from system bus
- Compatible operating system (Windows, DOS, or supported industrial OS)

Installation Steps:
1. Power off the host PC and remove the cover.
2. Insert the AD12-16U(PC)EH card into an available ISA slot.
3. Secure the card with the mounting screw.
4. Connect analog and digital signals to the D-Sub 37 connector.
5. Configure jumpers or DIP switches for input range, channel mode, DMA, and IRQ settings.
6. Install the driver software and verify device recognition.
7. Use the provided utilities or SDK to test sampling and data acquisition.

Mounting Options:
- Standard ISA slot mounting
- Optional bracket for industrial chassis or rack systems

Configuration:
- Input range and channel mode selectable via software or hardware jumpers
- DMA and IRQ lines configurable for system compatibility
- FIFO buffer mode selectable (standard or ring buffer)

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### 7. Performance & Capabilities

Sampling Performance:
- Maximum throughput of 1 MS/s ensures accurate capture of high-frequency signals.
- 12-bit resolution provides fine granularity for precise measurement.

Buffering and Data Handling:
- 128 k-word FIFO enables continuous acquisition without data loss.
- Ring buffer mode supports real-time streaming and circular data logging.

Analog Output Performance:
- 12-bit D/A output with 6 µs conversion time allows fast analog control feedback.
- Output voltage ranges support a wide variety of actuators and control devices.

Digital I/O Performance:
- TTL-level I/O suitable for triggering, synchronization, and control signaling.

Efficiency and Reliability:
- Intelligent ASIC sampling control minimizes CPU load.
- DMA transfer ensures high-speed, low-latency data movement.
- Robust design ensures stable operation in industrial environments.

Limitations:
- ISA bus interface limits compatibility with modern PCI/PCIe systems (requires legacy or industrial PC).
- Single D/A output channel may limit simultaneous analog output applications.

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### 8. Standards & Compliance

Certifications and Compliance:
- Bus Standard: Compliant with ISA (Industry Standard Architecture) specifications.
- Electrical Safety: Designed to meet industrial safety and EMC standards.
- RoHS Compliance: Manufactured in accordance with RoHS directives for hazardous substance reduction.
- Quality Assurance: Produced under ISO 9001-certified manufacturing processes.

Industry Standards:
- Compatible with standard analog signal ranges (±10 V, ±5 V, 0–10 V, 0–5 V).
- TTL-level digital I/O conforms to standard logic voltage levels.
- FIFO and DMA operation conform to ISA bus timing and control protocols.

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### 9. Additional Information

Warranty:
Typically covered by a 1-year limited warranty from Contec, covering defects in materials and workmanship under normal use.

Technical Support:
Contec provides comprehensive technical support, including driver updates, documentation, and application notes. Support is available via online resources, email, and authorized distributors.

Maintenance:
- Periodic inspection of connectors and cabling recommended.
- Keep card free from dust and contaminants.
- Ensure proper grounding to prevent noise interference.

Software & Updates:
- Driver packages available for Windows and DOS environments.
- SDKs and sample programs provided for integration with custom applications.
- Firmware updates (if applicable) available through Contec’s support portal.

Service & Repair:
Authorized service centers provide repair and calibration services. Replacement parts and accessories are available through Contec’s distribution network.

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### Summary

The Contec AD12-16U(PC)EH is a robust, high-speed ISA analog-to-digital conversion card engineered for demanding data acquisition tasks. With its 12-bit resolution, 1 MS/s sampling rate, and large 128 k-word FIFO buffer, it delivers reliable, high-throughput performance for industrial and laboratory applications. Its flexible input configuration, integrated D/A output, and digital I/O capabilities make it a versatile solution for measurement, control, and automation systems. Designed for compatibility with legacy ISA architectures, it remains a dependable choice for engineers and system integrators requiring precise analog data capture and control in established industrial computing environments.