Overview
The AD7872TQ is a 14-bit, complete, sampling analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7871/AD7872 series, fabricated using the LC2MOS mixed technology process. It operates from ±5 V power supplies and accepts bipolar input signals of ±3 V, capable of converting full power signals up to 41.5 kHz. The AD7872TQ features a track-and-hold amplifier, a successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic, making it a robust solution for various data acquisition applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Input Voltage Range | ±3 V |
| Power Supply | ±5 V ± 5% |
| Conversion Rate | Up to 83 kHz |
| Internal Reference | 3 V ± 0 mV (buried Zener) |
| Output Format | Serial output only |
| Package Type | 16-Lead CERDIP |
| Operating Temperature Range | -55°C to +125°C |
| Track-and-Hold Acquisition Time | |
| Throughput Time | Maximum 12 μs (for 2 MHz input clock) |
Key Features
- Self-contained, laser-trimmed internal clock, eliminating the need for external clock timing components.
- On-chip temperature-compensated 3 V buried Zener reference, factory-trimmed to ±0 mV.
- High-speed comparator and CMOS SAR (Successive Approximation Register) for efficient conversion.
- Track-and-hold amplifier with a 0.1 dB cutoff frequency at 500 kHz and acquisition time of less than 2 μs.
- Dynamic performance specifications include distortion and signal-to-noise ratio.
- No external components required apart from power supply decoupling capacitors.
Applications
The AD7872TQ is suitable for a variety of data acquisition and signal processing applications. It can be used in systems requiring high accuracy and dynamic performance, such as:
- Industrial control systems.
- Medical devices.
- Aerospace and defense systems.
- Automotive systems.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7872TQ ADC?
The AD7872TQ has a resolution of 14 bits. - What is the input voltage range of the AD7872TQ?
The input voltage range is ±3 V. - What are the power supply requirements for the AD7872TQ?
The device operates from ±5 V power supplies. - What is the maximum conversion rate of the AD7872TQ?
The maximum conversion rate is up to 83 kHz. - Does the AD7872TQ have an internal reference?
Yes, it has a 3 V buried Zener reference that is temperature-compensated and factory-trimmed to ±0 mV. - What is the output format of the AD7872TQ?
The output format is serial only. - What package types are available for the AD7872TQ?
The AD7872TQ is available in a 16-Lead CERDIP package. - What is the operating temperature range of the AD7872TQ?
The operating temperature range is -55°C to +125°C. - How long does the track-and-hold amplifier take to acquire an input signal?
The track-and-hold amplifier acquires an input signal in less than 2 μs. - What is the maximum throughput time for the AD7872TQ with a 2 MHz input clock?
The maximum throughput time is 12 μs.
