Overview
The AD7871TQ is a high-performance, 14-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7871 and AD7872 series, known for their fast conversion rates and comprehensive feature set. The AD7871TQ is fabricated using Analog Devices' LC2MOS mixed technology process, ensuring high accuracy and reliability. It features a track-and-hold amplifier, a successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic. The device operates from ±5 V power supplies and can handle bipolar input signals of ±3 V, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 14 bits |
| Power Supply | ±5 V ± 5% |
| Input Signal Range | ±3 V |
| Conversion Rate | Up to 83 kHz |
| Output Format | Single 14-bit parallel word, two 8-bit bytes, or 14-bit serial data stream (AD7871 only; AD7871TQ is specific to parallel and byte formats) |
| Package Options | 28-pin PDIP, PLCC, CERDIP |
| Operating Temperature Range | –55°C to +125°C (for TQ models) |
| Internal Clock | Self-contained, laser trimmed; can be overridden by external clock |
Key Features
- High-resolution 14-bit conversion
- Fast conversion rates up to 83 kHz
- Bipolar input signal handling (±3 V)
- Self-contained, laser trimmed internal clock with option for external override
- Multiple output formats: single 14-bit parallel word, two 8-bit bytes (AD7871 only), or 14-bit serial data stream (AD7872 only)
- Comprehensive dynamic performance specifications including distortion and signal-to-noise ratio
- No external clock timing components required apart from power supply decoupling capacitors
Applications
The AD7871TQ is suitable for various applications requiring high-precision analog-to-digital conversion. These include:
- Data acquisition systems
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- High-performance measurement and testing equipment
Q & A
- What is the resolution of the AD7871TQ?
The AD7871TQ has a resolution of 14 bits.
- What are the power supply requirements for the AD7871TQ?
The AD7871TQ operates from ±5 V power supplies.
- What is the input signal range for the AD7871TQ?
The AD7871TQ can handle bipolar input signals of ±3 V.
- What are the available output formats for the AD7871TQ?
The AD7871TQ offers single 14-bit parallel word and two 8-bit bytes output formats.
- Does the AD7871TQ require an external clock?
No, the AD7871TQ has a self-contained, laser trimmed internal clock, but it can be overridden by an external clock if necessary.
- What are the package options for the AD7871TQ?
The AD7871TQ is available in 28-pin PDIP, PLCC, and CERDIP packages.
- What is the operating temperature range for the AD7871TQ?
The operating temperature range for the AD7871TQ is –55°C to +125°C.
- What dynamic performance parameters are specified for the AD7871TQ?
The AD7871TQ is fully specified for dynamic performance parameters including distortion and signal-to-noise ratio.
- Are there any specific applications where the AD7871TQ is particularly useful?
The AD7871TQ is particularly useful in data acquisition systems, industrial control systems, medical devices, aerospace and defense systems, and high-performance measurement and testing equipment.
- What is the fabrication process used for the AD7871TQ?
The AD7871TQ is fabricated using Analog Devices' LC2MOS mixed technology process.
