Overview
The MAX191BENG+ is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) designed by Analog Devices Inc./Maxim Integrated. This device features differential inputs, a track/hold (T/H) circuit, an internal voltage reference, and the option to use either an internal or external clock. It supports both parallel and serial microprocessor interfaces, making it versatile for various applications. The MAX191BENG+ operates from a single +5V supply or from dual ±5V supplies, allowing it to handle ground-referenced bipolar input signals.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12 Bits | |
| Conversion Time | 7.5 µs | |
| Acquisition Time | 2 µs | |
| Sample Rate | 100 ksps | |
| Supply Voltage | +5V or ±5V | |
| Operating Current | 3 mA (operating), 50 µA (power-down) | |
| Operating Temperature Range | -40°C to +85°C (MAX191_E_ _) | |
| Storage Temperature Range | -65°C to +160°C | |
| Interface Modes | Two 8-bit parallel modes, serial interface mode (compatible with SPI, QSPI, MICROWIRE) |
Key Features
- 12-bit resolution with 1/2 LSB linearity
- Built-in track/hold circuit
- Internal reference with adjustment capability
- Low power consumption: 3 mA in operating mode, 20 µA in power-down mode
- Support for +5V or ±5V operation
- Parallel and serial microprocessor interface options
- Logic power-down input to reduce current consumption
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 MAX191BENG+ ADC?
The MAX191BENG+ has a 12-bit resolution. - What are the conversion and acquisition times of the MAX191BENG+?
The conversion time is 7.5 µs, and the acquisition time is 2 µs. - What is the sample rate of the MAX191BENG+?
The sample rate is guaranteed at 100 ksps. - What are the supply voltage options for the MAX191BENG+?
The device can operate from a single +5V supply or from dual ±5V supplies. - How much current does the MAX191BENG+ consume in operating and power-down modes?
In operating mode, it consumes 3 mA, and in power-down mode, it consumes 50 µA. - What are the operating temperature ranges for the MAX191BENG+?
The operating temperature range is -40°C to +85°C for the MAX191_E_ _ version. - What types of interfaces does the MAX191BENG+ support?
The device supports two 8-bit parallel modes and a serial interface mode compatible with SPI, QSPI, and MICROWIRE. - Does the MAX191BENG+ have an internal reference?
Yes, it has an internal reference with adjustment capability. - What are some typical applications of the MAX191BENG+?
Typical applications include 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). - Is the MAX191BENG+ RoHS compliant?
While the specific document does not mention RoHS compliance, many modern components from Analog Devices Inc./Maxim Integrated are RoHS compliant, but this should be verified from the manufacturer's documentation or website.
