Overview
The MAX191AEWG+ is a monolithic, CMOS, 12-bit analog-to-digital converter (ADC) produced 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 MAX191AEWG+ operates from a single +5V supply or dual ±5V supplies, enabling ground-referenced bipolar input signals. It also includes a power-down feature that reduces the supply current significantly, making it power-efficient.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | 7.5µs |
| Acquisition Time | 2µs |
| Sample Rate | 100ksps |
| Supply Voltage | Single +5V or dual ±5V |
| Supply Current (Active) | 3mA (VDD) |
| Supply Current (Power-Down) | 50µA max |
| Interface Modes | Two 8-bit parallel modes, serial interface mode (SPI™, QSPI™, MICROWIRE™ compatible) |
| Package Type | Small-Outline IC, Wide (0.3in) |
Key Features
- Differential inputs with track/hold (T/H) circuit
- Internal voltage reference with adjustment input for trimming system gain errors
- Internal or external clock option
- Parallel or serial microprocessor interface (SPI™, QSPI™, MICROWIRE™ compatible)
- Power-down feature reducing supply current to 50µA max
- Single +5V or dual ±5V supply operation allowing ground-referenced bipolar input signals
- Decoupling capacitors as the only required external components for power supply and reference
Applications
The MAX191AEWG+ is suitable for a variety of applications requiring precise analog-to-digital conversion. These include:
- Data acquisition systems
- Industrial control systems
- Medical devices requiring high accuracy and low power consumption
- Aerospace and defense applications where reliability and precision are critical
- Automotive systems needing robust and efficient ADCs
Q & A
- What is the resolution of the MAX191AEWG+ ADC?
The MAX191AEWG+ has a resolution of 12 bits.
- What is the conversion time of the MAX191AEWG+?
The conversion time is 7.5µs.
- What is the sample rate of the MAX191AEWG+?
The sample rate is 100ksps.
- What are the supply voltage options for the MAX191AEWG+?
The device can operate from a single +5V supply or dual ±5V supplies.
- How much current does the MAX191AEWG+ consume in power-down mode?
In power-down mode, the supply current is reduced to 50µA max.
- What types of interfaces does the MAX191AEWG+ support?
The device supports two 8-bit parallel modes and a serial interface mode compatible with SPI™, QSPI™, and MICROWIRE™ standards.
- What external components are required for the power supply and reference of the MAX191AEWG+?
Decoupling capacitors are the only external components needed.
- What is the package type of the MAX191AEWG+?
The package type is Small-Outline IC, Wide (0.3in).
- Can the MAX191AEWG+ be used in bipolar input signal applications?
- Is there an evaluation kit available for the MAX191AEWG+?
