Overview
The AD7870LPZ is a fast, complete 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device integrates a track-and-hold amplifier, an 8 μs successive approximation ADC, a 3 V buried Zener reference, and versatile interface logic on a single chip. It features a self-contained internal clock that is laser-trimmed for accurate control of conversion time, eliminating the need for external clock timing components. The AD7870LPZ supports three data output formats: a single parallel 12-bit word, two 8-bit bytes, or serial data. This makes it highly compatible with modern microprocessors and digital signal processors due to its fast bus access times and standard control inputs.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | 8 μs |
| Input Signal Range | ±3 V |
| Power Supply | ±5 V |
| Maximum Sampling Rate | 100 kHz |
| Data Output Formats | Parallel 12-bit word, two 8-bit bytes, or serial data |
| Package Type | 28-pin PLCC (Plastic Leaded Chip Carrier) |
| Operating Temperature Range | 0°C to +70°C |
| Power Consumption | Typically 60 mW |
Key Features
- Complete 12-bit ADC on a single chip, including track-and-hold amplifier, successive approximation ADC, and 3 V buried Zener reference.
- Self-contained internal clock with the option to override with an external clock.
- Fast bus access times of 57 ns, ensuring compatibility with modern microprocessors and digital signal processors.
- Dynamic performance specifications including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
- Multiple data output formats: parallel 12-bit word, two 8-bit bytes, or serial data.
- Operates from ±5 V power supplies.
- Available in 28-pin PLCC package.
Applications
The AD7870LPZ is suitable for a variety of applications requiring high-speed and accurate analog-to-digital conversion. These include:
- Digital signal processing systems.
- High-speed data acquisition systems.
- Industrial control systems.
- Medical devices requiring precise signal conversion.
- Aerospace and defense applications where reliability and accuracy are critical.
Q & A
- What is the resolution of the AD7870LPZ ADC?
The AD7870LPZ has a resolution of 12 bits.
- What is the conversion time of the AD7870LPZ?
The conversion time is 8 μs.
- What are the input signal ranges supported by the AD7870LPZ?
The AD7870LPZ supports an input signal range of ±3 V.
- What are the power supply requirements for the AD7870LPZ?
The device operates from ±5 V power supplies.
- What are the available data output formats for the AD7870LPZ?
The device supports parallel 12-bit word, two 8-bit bytes, or serial data output formats.
- What is the typical power consumption of the AD7870LPZ?
The typical power consumption is 60 mW.
- In what package type is the AD7870LPZ available?
The AD7870LPZ is available in a 28-pin PLCC package.
- What is the operating temperature range of the AD7870LPZ?
The operating temperature range is 0°C to +70°C.
- Is the AD7870LPZ compatible with modern microprocessors and digital signal processors?
Yes, it is compatible due to its fast bus access times and standard control inputs.
- Does the AD7870LPZ have dynamic performance specifications?
Yes, it includes specifications for signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
