Overview
The AD7868AN, produced by Analog Devices Inc., is a complete 12-bit analog input/output (I/O) system. This integrated circuit combines a 12-bit analog-to-digital converter (ADC) with a track-and-hold amplifier and a 12-bit digital-to-analog converter (DAC) with an output amplifier. The device also includes on-chip voltage references for both the ADC and DAC, ensuring high precision and stability. It operates from ±5 V power supplies and features a small package size, making it suitable for a variety of applications requiring high-performance analog I/O capabilities.
Key Specifications
| Parameter | Value | Units | Conditions |
|---|---|---|---|
| ADC Resolution | 12 bits | ||
| ADC Throughput Rate | 83 kHz | ||
| ADC Signal-to-Noise Ratio (SNR) | 72 dB | ||
| DAC Resolution | 12 bits | ||
| DAC Settling Time | 3 µs | To 12 bits | |
| DAC Signal-to-Noise Ratio (SNR) | 72 dB | ||
| Power Supplies | ±5 V | ||
| Power Consumption | 130 mW (typ) | ||
| Package Types | 24-pin DIP, 28-pin SOIC | ||
| Analog Input/Output Range | ±3 V |
Key Features
- Complete 12-bit I/O system with ADC and DAC.
- Successive approximation ADC with track-and-hold amplifier.
- DAC with output buffer amplifier and 3 µs settling time.
- On-chip 3 V buried Zener references for precision.
- Serial interface for both ADC and DAC, minimizing pin count.
- Internal clock oscillator or external TTL-compatible clock option.
- Low power consumption of 130 mW (typ).
- Dynamic specifications including SNR and harmonic distortion.
Applications
- Digital Signal Processing (DSP).
- Speech Recognition and Synthesis.
- Spectrum Analysis.
- High-Speed Modems.
- DSP Servo Control.
Q & A
- What is the resolution of the ADC and DAC in the AD7868AN? The AD7868AN has both a 12-bit ADC and a 12-bit DAC.
- What is the throughput rate of the ADC? The ADC has a throughput rate of 83 kHz.
- What is the signal-to-noise ratio (SNR) of the ADC and DAC? Both the ADC and DAC have an SNR of 72 dB.
- What is the settling time of the DAC? The DAC has a settling time of 3 µs to 12 bits.
- What are the power supply requirements for the AD7868AN? The device operates from ±5 V power supplies.
- What is the typical power consumption of the AD7868AN? The typical power consumption is 130 mW.
- What package types are available for the AD7868AN? The device is available in 24-pin DIP and 28-pin SOIC packages.
- What is the analog input/output range of the AD7868AN? The analog input/output range is ±3 V.
- Does the AD7868AN have on-chip voltage references? Yes, it includes on-chip 3 V buried Zener references for both the ADC and DAC.
- Can the AD7868AN use an external clock? Yes, it can use either an internal clock oscillator or an external TTL-compatible clock.
