Overview
The MAX191BEWG+ is a 12-bit, low-power, analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This monolithic CMOS device features differential inputs, a track/hold (T/H) circuit, an internal voltage reference, and flexible interface options. It operates from a single +5V supply or dual ±5V supplies, allowing for ground-referenced bipolar input signals. The MAX191 is designed for high accuracy and low power consumption, making it suitable for a variety of applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 12 Bits | |||
| Conversion Time | 7.5 | µs | ||
| Acquisition Time | 2 | µs | ||
| Sample Rate | 100 | ksps | ||
| Supply Voltage | +5 | ±5 | V | |
| Operating Current | 3 | mA | ||
| Power-Down Current | 20 | µA | ||
| Offset Error | ±1 | ±2 | LSB | |
| Differential Nonlinearity | ±1 | LSB | ||
| Integral Nonlinearity | ±1/2 | ±2 | LSB | |
| Gain Error | ±1 | ±3 | LSB | |
| Storage Temperature Range | -65 | +160 | °C | |
Key Features
- 12-bit resolution with 1/2 LSB linearity
- Operation from +5V or ±5V supplies
- Built-in track/hold circuitry
- Internal reference with adjustment capability
- Low power consumption: 3mA operating mode, 20µA power-down mode
- 100ksps tested sampling rate
- Flexible interface options: two 8-bit parallel modes and a serial interface mode compatible with SPI, QSPI, and MICROWIRE standards
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 MAX191 ADC?
The MAX191 has a 12-bit resolution.
- What are the supply voltage options for the MAX191?
The MAX191 can operate from a single +5V supply or dual ±5V supplies.
- What is the conversion time of the MAX191?
The conversion time of the MAX191 is 7.5µs.
- What is the acquisition time of the MAX191?
The acquisition time of the MAX191 is 2µs.
- What is the sampling rate of the MAX191?
The MAX191 has a guaranteed 100ksps sample rate.
- Does the MAX191 require external components for operation?
No, the MAX191 requires only decoupling capacitors for the power supply and reference.
- What are the interface options available for the MAX191?
The MAX191 provides two 8-bit parallel modes and a serial interface mode compatible with SPI, QSPI, and MICROWIRE standards.
- What is the power consumption of the MAX191 in operating and power-down modes?
The MAX191 consumes 3mA in operating mode and 20µA in power-down mode.
- What is the storage temperature range for the MAX191?
The storage temperature range for the MAX191 is -65°C to +160°C.
- What are some typical applications of the MAX191?
The MAX191 is 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).
