Overview
The AD7880CR, manufactured by Analog Devices Inc., is a high-speed, low-power, 12-bit analog-to-digital converter (ADC) designed to operate from a single +5 V supply. This ADC features a 3 µs track/hold amplifier and a 12 µs successive-approximation conversion process, making it suitable for applications requiring high-speed data acquisition. The AD7880CR is fabricated using Analog Devices’ Linear Compatible CMOS (LC2MOS) process, which combines precision bipolar circuits with low-power CMOS logic. This component is available in a 24-pin SOIC package and is known for its fast conversion time, low power consumption, and versatile interface logic.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | Up to 66 kHz |
| Conversion Time | 12 µs |
| Acquisition Time | 3 µs |
| Input Type | Single Ended |
| Input Ranges | 0 V to 5 V, 0 V to 10 V |
| Data Interface | Parallel |
| Architecture | Successive Approximation (SAR) |
| Reference Type | External, Supply |
| Supply Voltage (Analog/Digital) | +5 V |
| Power Consumption (Normal/Power-Down) | 25 mW / 2 mW |
| Operating Temperature | -40°C to +85°C |
| Package Type | 24-pin SOIC |
Key Features
- Fast Conversion Time: The AD7880CR has a conversion time of 12 µs and an acquisition time of 3 µs, making it suitable for high-speed applications.
- Low Power Consumption: It operates at 25 mW in normal mode and 2 mW in power-down mode, ideal for battery-powered and portable systems.
- Versatile Interface Logic: The component includes fast bus access times and standard control inputs, ensuring easy interfacing with modern microprocessors and digital signal processors.
- Multiple Input Ranges: It can handle both unipolar input signals in the ranges of 0 V to 5 V and 0 V to 10 V.
- High Dynamic Performance: Fully specified for dynamic performance parameters including harmonic distortion and signal-to-noise ratio (SNR) of 70 dB.
Applications
- Battery Powered Portable Systems: Ideal for handheld and battery-powered devices due to its low power consumption.
- Digital Signal Processing: Suitable for applications in telecommunications, audio, sonar, and radar signal processing.
- Speech Recognition and Synthesis: Used in speech processing systems due to its high-speed and low-power characteristics.
- High Speed Modems: Applicable in high-speed data transmission systems.
- Control and Instrumentation: Used in various control and instrumentation applications requiring precise and fast data acquisition.
Q & A
- What is the conversion time of the AD7880CR?
The conversion time of the AD7880CR is 12 µs.
- What are the input voltage ranges for the AD7880CR?
The AD7880CR can handle input voltage ranges of 0 V to 5 V and 0 V to 10 V.
- What is the power consumption of the AD7880CR in normal and power-down modes?
The power consumption is 25 mW in normal mode and 2 mW in power-down mode.
- What is the sampling rate of the AD7880CR?
The sampling rate of the AD7880CR is up to 66 kHz.
- What type of package is the AD7880CR available in?
The AD7880CR is available in a 24-pin SOIC package.
- What is the operating temperature range of the AD7880CR?
The operating temperature range is -40°C to +85°C.
- What architecture does the AD7880CR use?
The AD7880CR uses a Successive Approximation (SAR) architecture.
- What are some typical applications of the AD7880CR?
Typical applications include battery-powered portable systems, digital signal processing, speech recognition and synthesis, high-speed modems, and control and instrumentation.
- How does the AD7880CR handle input signals?
The AD7880CR can handle both unipolar input signals and includes an internal resistor network to accept both unipolar and bipolar input signals while operating from a single +5 V supply.
- What is the signal-to-noise ratio (SNR) of the AD7880CR?
The signal-to-noise ratio (SNR) of the AD7880CR is 70 dB.
