Overview
The AD678KNZ is a 12-bit monolithic analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed to be a complete, multipurpose ADC, integrating a sample-hold amplifier (SHA), a microprocessor-compatible bus interface, a voltage reference, and clock generation circuitry. The AD678KNZ is fabricated using Analog Devices' BiMOS process, combining low-power CMOS logic with high-precision, low-noise bipolar circuits. This ensures high accuracy and reliability in various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Sampling Rate | 200 kSPS |
| Analog Input Voltage (Max) | 10 V |
| Polarity | Bipolar, Unipolar |
| Integral Nonlinearity (INL) | 1 LSB |
| Supply Voltage | +5 V, ±12 V |
| Power Dissipation | 560 mW (typ) |
| Package | 28-Lead PDIP |
| Operating Temperature Range | 0 to 70°C |
| Input Impedance | 10 MΩ |
Key Features
- High-speed conversion using a recursive subranging algorithm with error correction and flash converter circuitry.
- Microprocessor-compatible bus interface with options for 16-bit or 8-bit bus access.
- Data format in straight binary for unipolar mode and two's complement binary for bipolar mode.
- High input impedance allowing direct connection to unbuffered sources without signal degradation.
- Laser-trimmed thin-film resistors for high accuracy.
- Available in various packages including 28-pin plastic DIP, ceramic DIP, and 44 J-leaded ceramic surface mount.
- Screening to MIL-STD-883C Class B available.
Applications
The AD678KNZ is suitable for a variety of applications requiring high-speed and high-accuracy analog-to-digital conversion. These include:
- Signal processing applications where dynamic parameters such as S/N+D ratio, THD, and IMD are critical.
- Measurement applications where dc parameters are important.
- Industrial control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Aerospace and defense systems where reliability and accuracy are paramount.
Q & A
- What is the resolution of the AD678KNZ ADC?
The AD678KNZ has a resolution of 12 bits.
- What is the sampling rate of the AD678KNZ?
The sampling rate of the AD678KNZ is 200 kSPS.
- What are the supply voltage requirements for the AD678KNZ?
The AD678KNZ operates from +5 V and ±12 V supplies.
- What is the input impedance of the AD678KNZ?
The input impedance of the AD678KNZ is 10 MΩ.
- Can the AD678KNZ be used in both unipolar and bipolar modes?
- What is the typical power dissipation of the AD678KNZ?
The typical power dissipation of the AD678KNZ is 560 mW.
- In what packages is the AD678KNZ available?
The AD678KNZ is available in 28-pin plastic DIP, ceramic DIP, and 44 J-leaded ceramic surface mount packages.
- Is the AD678KNZ suitable for military applications?
- What is the operating temperature range of the AD678KNZ?
The operating temperature range of the AD678KNZ is 0 to 70°C.
- How does the AD678KNZ achieve high accuracy and speed?
The AD678KNZ uses a recursive subranging algorithm with error correction and flash converter circuitry, along with laser-trimmed thin-film resistors.
