Overview
The AD7870KPZ is a complete 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component integrates all necessary functions for analog-to-digital conversion, including a track-and-hold amplifier, an 8 μs successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic. The ADC features a self-contained internal clock, which is laser trimmed to ensure accurate control of conversion time, and does not require external clock timing components. It is designed to operate from ±5 V power supplies and supports various input signal ranges, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | 8 μs |
| Input Range | ±3 V |
| Power Supply | ±5 V |
| Reference Voltage | 3 V ± 10 mV |
| Data Access Time | 57 ns |
| Package Type | 28-Lead PLCC |
| Operating Temperature Range | 0°C to +70°C |
| Interface Options | Parallel (12-bit word), Two 8-bit bytes, Serial data |
Key Features
- Complete 12-bit ADC on a single chip, including track-and-hold amplifier, successive approximation ADC, and internal reference.
- Self-contained internal clock with the option to override with an external clock.
- Fast microprocessor interface with data access times of 57 ns, compatible with modern 8-bit and 16-bit microprocessors and digital signal processors.
- Dynamic specifications fully tested for ac parameters, including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
- On-chip temperature-compensated buried Zener reference, factory trimmed to 3 V ± 10 mV.
- Low power consumption: typically 60 mW.
Applications
The AD7870KPZ is suitable for various applications requiring high-speed and accurate analog-to-digital conversion. These include:
- Digital signal processing systems.
- Industrial control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Aerospace and defense applications where reliability and accuracy are critical.
- Automotive systems that require robust and high-performance ADCs.
Q & A
- What is the resolution of the AD7870KPZ ADC?
The AD7870KPZ has a resolution of 12 bits.
- What is the conversion time of the AD7870KPZ?
The conversion time is 8 μs.
- What are the input voltage ranges supported by the AD7870KPZ?
The AD7870KPZ supports an input voltage range of ±3 V.
- What is the power supply requirement for the AD7870KPZ?
The AD7870KPZ operates from ±5 V power supplies.
- What types of interfaces are available for data output?
The AD7870KPZ offers parallel (12-bit word), two 8-bit bytes, and serial data output formats.
- Does the AD7870KPZ have an internal clock?
Yes, the AD7870KPZ features a self-contained internal clock that can be overridden by an external clock if needed.
- What is the temperature range for the AD7870KPZ?
The operating temperature range is 0°C to +70°C.
- What is the typical power consumption of the AD7870KPZ?
The typical power consumption is 60 mW.
- What kind of reference voltage does the AD7870KPZ use?
The AD7870KPZ uses a 3 V buried Zener reference, factory trimmed to ±10 mV.
- Is the AD7870KPZ compatible with modern microprocessors and digital signal processors?
Yes, it is compatible with modern 8-bit and 16-bit microprocessors and digital signal processors due to its fast data access times.
