Overview
The MAX1291BEEI+T is a low-power, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device features a successive-approximation ADC with an input track/hold (T/H) stage, enabling the conversion of analog input signals to digital outputs. It operates with a single +3V analog supply and includes a VLOGIC pin that allows it to interface directly with a +1.8V to +5.5V digital supply. The MAX1291BEEI+T is known for its high-speed, byte-wide parallel interface and low power consumption, making it suitable for a variety of applications, especially those requiring minimal power and space.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Resolution | 12-bit | |
| Conversion Rate | 250ksps | |
| Analog Supply Voltage | 2.7V to 3.6V | V |
| Digital Supply Voltage | 1.8V to 3.6V | V |
| Internal Reference | +2.5V | V |
| Power Consumption (at 250ksps) | 5.7mW | mW |
| Power Consumption (in shutdown mode) | 2µA | µA |
| Number of Channels | 8 single-ended / 4 pseudo-differential | |
| Package Type | 28-pin QSOP | |
| Integral Nonlinearity (INL) | ±1 LSB |
Key Features
- Successive-approximation ADC with input track/hold (T/H) stage
- Software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation
- User-adjustable logic level (+1.8V to +3.6V)
- Internal +2.5V reference
- High-speed, byte-wide parallel interface
- Automatic power-down and fast wake-up (2µs)
- Low power consumption with two software-selectable power-down modes
- Small footprint in a 28-pin QSOP package
Applications
The MAX1291BEEI+T is ideal for various applications requiring low power and high precision, such as:
- Battery-powered devices
- Data-acquisition systems
- Circuits with demanding power consumption and space requirements
Q & A
- What is the resolution of the MAX1291BEEI+T ADC?
The MAX1291BEEI+T has a 12-bit resolution.
- What is the maximum conversion rate of the MAX1291BEEI+T?
The maximum conversion rate is 250ksps.
- What is the operating voltage range for the analog supply?
The analog supply voltage ranges from 2.7V to 3.6V.
- What is the power consumption at the maximum sampling rate?
The power consumption is 5.7mW at 250ksps.
- How many analog input channels does the MAX1291BEEI+T have?
The device has 8 single-ended or 4 pseudo-differential analog input channels.
- What is the package type of the MAX1291BEEI+T?
The device is packaged in a 28-pin QSOP.
- Does the MAX1291BEEI+T have an internal reference voltage?
Yes, it has an internal +2.5V reference voltage.
- What is the wake-up time from power-down mode?
The wake-up time is 2µs.
- Can the logic level be adjusted?
Yes, the logic level is user-adjustable from +1.8V to +3.6V.
- What are some typical applications for the MAX1291BEEI+T?
Typical applications include battery-powered devices, data-acquisition systems, and circuits with demanding power and space requirements.
