Overview
The AD7870JN, produced by Analog Devices Inc., is a fast, complete 12-bit analog-to-digital converter (ADC) that integrates all necessary functions for analog-to-digital conversion on a single chip. This includes 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 can be overridden by an external clock if required, ensuring accurate control of conversion time without the need for external clock timing components.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 100 kHz |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Input Range | ±3 V |
| Data Interface | Parallel and Serial |
| Architecture | SAR (Successive Approximation) |
| Reference Type | Internal 3 V buried Zener reference |
| Voltage - Supply, Analog | ±5 V |
| Voltage - Supply, Digital | 5 V |
| Operating Temperature | 0°C to +70°C |
| Package / Case | 24-pin PDIP (Plastic Dual In-Line Package) |
| Data Access Time | 57 ns |
Key Features
- Complete 12-bit ADC on a single chip, including track-and-hold amplifier, successive approximation ADC, and internal reference.
- Dynamic specifications for DSP users, including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
- Fast microprocessor interface with data access times of 57 ns, compatible with modern 8-bit and 16-bit microprocessors and digital signal processors.
- Self-contained internal clock with the option to override with an external clock.
- Low power consumption: 60 mW typical.
- Versatile interface logic supporting parallel and serial data output formats.
Applications
- Digital signal processing (DSP) systems requiring high accuracy and fast conversion rates.
- Industrial control systems where precise analog-to-digital conversion is necessary.
- Medical devices that require accurate and reliable ADCs.
- Aerospace and defense applications where robust and reliable ADCs are critical.
- Automotive systems that need fast and accurate data conversion.
Q & A
- What is the resolution of the AD7870JN ADC?
The AD7870JN is a 12-bit analog-to-digital converter.
- What are the input voltage ranges for the AD7870JN?
The AD7870JN accepts input signal ranges of ±3 V.
- What is the sampling rate of the AD7870JN?
The AD7870JN has a sampling rate of up to 100 kHz.
- What types of data output formats does the AD7870JN support?
The AD7870JN supports parallel and serial data output formats.
- Does the AD7870JN have an internal clock?
Yes, the AD7870JN has a self-contained internal clock that can be overridden by an external clock if required.
- What is the power consumption of the AD7870JN?
The AD7870JN has a typical power consumption of 60 mW.
- What is the operating temperature range of the AD7870JN?
The AD7870JN operates over a temperature range of 0°C to +70°C.
- What package types are available for the AD7870JN?
The AD7870JN is available in a 24-pin PDIP (Plastic Dual In-Line Package).
- Is the AD7870JN compatible with modern microprocessors and DSPs?
Yes, the AD7870JN is compatible with modern 8-bit and 16-bit microprocessors and digital signal processors due to its fast data access times.
- What are the key dynamic specifications of the AD7870JN?
The AD7870JN is fully specified for dynamic performance parameters including signal-to-noise ratio, harmonic distortion, and intermodulation distortion.
