Overview
The AD7870JPZ is a complete 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device 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 that is laser trimmed to ensure accurate control of conversion time, eliminating the need for external clock timing components. However, an external clock can override the internal clock if required. The AD7870JPZ is designed to operate from ±5 V power supplies and supports input signal ranges of ±3 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Input Range | ±3 V | V |
| Conversion Time | 8 μs | μs |
| Data Output Formats | Parallel (12-bit), Two 8-bit bytes, Serial | |
| Power Supply | ±5 V | V |
| Operating Temperature Range | 0°C to +70°C | °C |
| Package Type | 28-pin PLCC | |
| Data Access Time | 57 ns | ns |
| Power Consumption | -60 mW (typical) | mW |
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 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.
Applications
The AD7870JPZ is suitable for a wide range of applications, including:
- Digital signal processing (DSP) systems, where dynamic performance parameters such as signal-to-noise ratio and distortion are critical.
- Industrial control systems, where precise analog-to-digital conversion is necessary.
- Medical equipment, requiring high accuracy and reliability in signal conversion.
- Communication systems, where fast and accurate data conversion is essential).
Q & A
- What is the resolution of the AD7870JPZ ADC?
The AD7870JPZ has a resolution of 12 bits).
- What are the input signal ranges supported by the AD7870JPZ?
The AD7870JPZ supports an input signal range of ±3 V).
- What is the conversion time of the AD7870JPZ?
The conversion time of the AD7870JPZ is 8 μs).
- What data output formats are available for the AD7870JPZ?
The AD7870JPZ offers parallel (12-bit), two 8-bit bytes, and serial data output formats).
- What is the power supply requirement for the AD7870JPZ?
The AD7870JPZ operates from ±5 V power supplies).
- What is the operating temperature range of the AD7870JPZ?
The operating temperature range of the AD7870JPZ is 0°C to +70°C).
- What package types are available for the AD7870JPZ?
The AD7870JPZ is available in a 28-pin PLCC package).
- What is the data access time of the AD7870JPZ?
The data access time of the AD7870JPZ is 57 ns).
- What is the typical power consumption of the AD7870JPZ?
The typical power consumption of the AD7870JPZ is -60 mW).
- Can the internal clock of the AD7870JPZ be overridden by an external clock?
Yes, the internal clock of the AD7870JPZ can be overridden by an external clock if required).
