Overview
The MAX191ACNG is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is designed for high-performance applications requiring low power consumption and high accuracy. It features differential inputs, a track/hold (T/H) circuit, an internal voltage reference, and flexible interface options including parallel and serial modes compatible with SPI, QSPI, and MICROWIRE standards.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Resolution | 12-bit | ||
| Conversion Time | 7.5 µs | ||
| Acquisition Time | 2 µs | ||
| Sampling Rate | 100 kSPS | ||
| Supply Voltage | +5V or ±5V | ||
| Operating Current | 3 mA | Operating mode | |
| Power-Down Current | 20 µA | Power-down mode | |
| Input Type | Differential | ||
| Interface Type | Parallel, SPI |
Key Features
- 12-bit resolution with 1/2LSB linearity
- Internal track/hold circuitry without the need for an external hold capacitor
- Internal voltage reference with adjustment capability
- Low power consumption: 3 mA in operating mode and 20 µA in power-down mode
- Flexible interface options: two 8-bit parallel modes and a serial interface mode compatible with SPI, QSPI, and MICROWIRE standards
- Single +5V or dual ±5V supply operation, allowing for ground-referenced bipolar input signals
Applications
- Battery-Powered Data Logging
- PC Pen Digitizers
- High-Accuracy Process Control
- Electromechanical Systems
- Data-Acquisition Boards for PCs
- Automatic Testing Systems
- Telecommunications
- Digital Signal Processing (DSP)
Q & A
- What is the resolution of the MAX191ACNG ADC?
The MAX191ACNG has a 12-bit resolution.
- What is the conversion time of the MAX191ACNG?
The conversion time is 7.5 µs.
- What is the sampling rate of the MAX191ACNG?
The sampling rate is 100 kSPS.
- What are the supply voltage options for the MAX191ACNG?
The device can operate from a single +5V supply or from dual ±5V supplies.
- Does the MAX191ACNG have an internal voltage reference?
Yes, it has an internal voltage reference with adjustment capability.
- What are the interface options available for the MAX191ACNG?
The device supports two 8-bit parallel modes and a serial interface mode compatible with SPI, QSPI, and MICROWIRE standards.
- How much current does the MAX191ACNG consume in operating mode?
The operating current is 3 mA.
- What is the power-down current of the MAX191ACNG?
The power-down current is 20 µA.
- What type of input does the MAX191ACNG support?
The device supports differential inputs.
- In which applications is the MAX191ACNG commonly used?
It is commonly used in battery-powered data logging, PC pen digitizers, high-accuracy process control, electromechanical systems, data-acquisition boards for PCs, automatic testing systems, telecommunications, and digital signal processing (DSP).
