Overview
The AD7870JP, manufactured by Analog Devices Inc., is a fast, complete 12-bit analog-to-digital converter (ADC) designed for high-performance applications. This converter integrates a track-and-hold amplifier, a successive approximation ADC, a 3 V internal reference, and versatile interface logic on a single chip. It operates from ±5 V power supplies and is available in a 28-pin plastic leaded chip carrier (PLCC) package. The AD7870JP is suitable for a wide range of applications requiring precise analog-to-digital conversion, including those in the fields of data acquisition, digital signal processing, and microprocessor interfacing.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 100 kHz |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Input Voltage Range | ±3 V |
| Data Interface | Parallel, Serial (SPI) |
| Configuration | S/H-ADC |
| Architecture | Successive Approximation (SAR) |
| Reference Type | Internal 3 V |
| Voltage - Supply, Analog/Digital | ±5 V |
| Operating Temperature | 0°C to +70°C |
| Package | 28-pin PLCC (J-Lead) |
| Data Access Time | 57 ns |
| Power Consumption | Typically 60 mW |
Key Features
- Complete 12-bit ADC on a single chip, including track-and-hold amplifier, successive approximation ADC, and internal 3 V reference.
- 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 for DSP users, including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
- Self-contained internal clock with the option to override with an external clock.
- Multiple data output formats: single 12-bit parallel word, two 8-bit bytes, or serial data.
- Low power consumption of typically 60 mW.
Applications
- Data acquisition systems requiring high precision and speed.
- Digital signal processing applications where dynamic performance parameters are critical.
- Microprocessor and digital signal processor interfacing due to fast bus access times.
- Industrial control systems and automation where accurate analog-to-digital conversion is necessary.
- Medical and scientific instruments that require precise data acquisition.
Q & A
- What is the resolution of the AD7870JP ADC?
The AD7870JP is a 12-bit analog-to-digital converter.
- What are the input voltage ranges for the AD7870JP?
The AD7870JP accepts input signals in the range of ±3 V.
- What are the power supply requirements for the AD7870JP?
The AD7870JP operates from ±5 V power supplies.
- What is the sampling rate of the AD7870JP?
The AD7870JP has a sampling rate of 100 kHz.
- What types of data interfaces does the AD7870JP support?
The AD7870JP supports parallel and serial (SPI) data interfaces.
- What is the typical power consumption of the AD7870JP?
The typical power consumption is 60 mW.
- What is the operating temperature range for the AD7870JP?
The operating temperature range is 0°C to +70°C.
- What package types are available for the AD7870JP?
The AD7870JP is available in a 28-pin PLCC (J-Lead) package.
- Does the AD7870JP have an internal clock?
Yes, the AD7870JP has a self-contained internal clock that can be overridden by an external clock if required.
- What are the key dynamic specifications for the AD7870JP?
The AD7870JP is fully specified for dynamic performance parameters including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
