Overview
The AD7871JNZ is a high-performance, 14-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7871 series, which includes the AD7871 and AD7872 models. The AD7871JNZ is a complete, sampling ADC that features a track-and-hold amplifier, a successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic. It operates from ±5 V power supplies and can accept bipolar input signals of ±3 V, making it suitable for a wide range of applications requiring high accuracy and dynamic performance.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 14 bits |
| Input Range | ±3 V bipolar |
| Power Supplies | ±5 V |
| Maximum Sampling Rate | Up to 41.5 kHz |
| Data Output Formats | Single 14-bit parallel word, two 8-bit bytes, or 14-bit serial data stream |
| Package Types | 28-pin PDIP, PLCC, CERDIP |
| Operating Temperature Range | 0°C to +70°C |
| Internal Reference | 3 V buried Zener reference, factory trimmed to 3 V ± 0 mV |
| Track-and-Hold Amplifier Acquisition Time | |
| Throughput Time | Maximum of 12 μs for a 2 MHz input clock |
Key Features
- Self-Contained Clock: The AD7871JNZ features a self-contained, laser-trimmed internal clock, eliminating the need for external clock timing components. The on-chip clock can be overridden to synchronize ADC operation with the digital system for minimal noise.
- Versatile Interface Logic: The device offers a choice of three data output formats: a single 14-bit parallel word, two 8-bit bytes, or a 14-bit serial data stream, making it compatible with various microprocessors and digital signal processors.
- High Accuracy and Dynamic Performance: Fully specified for both dc accuracy and dynamic performance parameters, including distortion and signal-to-noise ratio.
- Internal Reference: Includes a 3 V buried Zener reference that is temperature compensated and factory trimmed, providing both the DAC reference and the dc bias required for bipolar operation.
- Track-and-Hold Amplifier: Allows accurate conversion of input sine waves up to 6 V peak-peak amplitude with an acquisition time of less than 2 μs.
Applications
- Data Acquisition Systems: Ideal for high-precision data acquisition systems that require fast sampling rates and high accuracy.
- Industrial Control Systems: Suitable for industrial control applications where precise measurement and control are critical.
- Medical Devices: Can be used in medical devices that require accurate and reliable analog-to-digital conversion.
- Aerospace and Defense: Applicable in aerospace and defense systems where high performance and reliability are essential.
Q & A
- What is the resolution of the AD7871JNZ ADC?
The AD7871JNZ has a resolution of 14 bits.
- What are the power supply requirements for the AD7871JNZ?
The AD7871JNZ operates from ±5 V power supplies.
- What are the available data output formats for the AD7871JNZ?
The device offers a single 14-bit parallel word, two 8-bit bytes, or a 14-bit serial data stream.
- What is the maximum sampling rate of the AD7871JNZ?
The maximum sampling rate is up to 41.5 kHz.
- What type of internal reference does the AD7871JNZ have?
The device features a 3 V buried Zener reference that is temperature compensated and factory trimmed.
- How long does the track-and-hold amplifier take to acquire an input signal?
The track-and-hold amplifier acquires an input signal to 14-bit accuracy in less than 2 μs.
- What is the throughput time for the AD7871JNZ with a 2 MHz input clock?
The throughput time is a maximum of 12 μs.
- In what packages is the AD7871JNZ available?
The AD7871JNZ is available in 28-pin PDIP, PLCC, and CERDIP packages.
- What is the operating temperature range for the AD7871JNZ?
The operating temperature range is 0°C to +70°C.
- Can the internal clock of the AD7871JNZ be overridden?
Yes, the on-chip clock can be overridden to synchronize ADC operation with the digital system for minimal noise.
