Overview
The AD670KPZ is a comprehensive 8-bit signal conditioning analog-to-digital converter (ADC) produced by Analog Devices Inc. This device integrates an instrumentation amplifier front end, a digital-to-analog converter (DAC), a comparator, a successive approximation register (SAR), a precision voltage reference, and a three-state output buffer on a single monolithic chip. It is designed to interface directly with analog systems to an 8-bit data bus without requiring external components or user trims for full accuracy. The AD670KPZ operates on a +5 V system supply and is configured for both unipolar and bipolar inputs.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 8 |
| Input Ranges | 0 mV to 255 mV (1 mV/LSB), 0 to 2.55 V (10 mV/LSB) |
| Polarity | Bipolar, Unipolar |
| Integral Nonlinearity (INL) | 0.5 LSB |
| Supply Voltage | 4.5 V to 5.5 V |
| Conversion Time | 10 µs |
| Package Type | 20-Lead LCC (J-Lead) |
| Operating Temperature Range | -40°C to +85°C (Grade B) |
Key Features
- Differential inputs with excellent common-mode rejection, allowing direct interface to various transducers.
- No external components or user trims required for full accuracy.
- Integrated instrumentation amplifier, DAC, comparator, SAR, precision voltage reference, and three-state output buffer.
- Thin-film SiCr resistors for stability and laser wafer trimming for calibration within ±1 LSB.
- Available in multiple package types, including 20-pin plastic DIP, 20-terminal PLCC, and 20-pin ceramic DIP.
Applications
- Conversion of transducer signals superimposed on common-mode voltages.
- Industrial control and measurement systems.
- Medical devices requiring precise signal conditioning.
- Aerospace and military applications where high reliability and precision are critical.
Q & A
- What is the primary function of the AD670KPZ?
The AD670KPZ is an 8-bit signal conditioning analog-to-digital converter that integrates various components to convert analog signals to digital data.
- What are the input ranges for the AD670KPZ?
The input ranges are 0 mV to 255 mV (1 mV/LSB) and 0 to 2.55 V (10 mV/LSB).
- Does the AD670KPZ support bipolar and unipolar inputs?
- What is the conversion time of the AD670KPZ?
The conversion time is 10 µs.
- What is the operating supply voltage for the AD670KPZ?
The operating supply voltage is between 4.5 V and 5.5 V.
- What types of packages are available for the AD670KPZ?
The AD670KPZ is available in 20-Lead LCC (J-Lead), 20-pin plastic DIP, 20-terminal PLCC, and 20-pin ceramic DIP packages.
- What is the significance of the integral nonlinearity (INL) specification?
The INL of 0.5 LSB indicates the maximum deviation from the ideal transfer function, ensuring high accuracy in the conversion process.
- Is the AD670KPZ suitable for high-reliability applications?
- What are some common applications of the AD670KPZ?
- Does the AD670KPZ require any external components or user trims?
