Overview
The MAX1291BCEI+ is a low-power, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is part of the MAX1291/MAX1293 series, known for its high performance, low power consumption, and compact design. The MAX1291BCEI+ operates with a single +3V analog supply and features a user-adjustable logic level, allowing it to interface directly with digital supplies ranging from +1.8V to +5.5V. It is ideal for battery-powered and data-acquisition applications where power efficiency and space are critical.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Sampling Rate | Up to 250ksps |
| Analog Supply Voltage | 2.7V to 3.6V |
| Digital Supply Voltage | 1.8V to 3.6V |
| Number of Channels | 8 single-ended / 4 pseudo-differential |
| Reference Type | Internal (+2.5V) / External |
| Integral Nonlinearity (INL) | ±1 LSB |
| Operating Temperature | 0°C to +70°C |
| Package Type | 28-pin QSOP |
| Power Consumption | 5.7mW at 250ksps, <10µA in power-down mode |
Key Features
- Successive-approximation ADC with automatic power-down and fast wake-up (2µs)
- Software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation
- Internal +2.5V reference and high-speed, byte-wide parallel interface
- User-adjustable logic level (+1.8V to +3.6V)
- Low power consumption: 1.9mA at 250ksps, 2µA in shutdown mode
- Small footprint: 28-pin QSOP package
- Internal 3MHz full-power bandwidth track/hold stage
Applications
The MAX1291BCEI+ is suitable for a variety of applications, including battery-powered devices, data-acquisition systems, and other circuits with stringent power consumption and space requirements. It is particularly useful in medical devices, industrial control systems, and portable electronics where low power and high accuracy are essential.
Q & A
- What is the resolution of the MAX1291BCEI+ ADC?
The MAX1291BCEI+ has a 12-bit resolution. - What is the maximum sampling rate of the MAX1291BCEI+?
The maximum sampling rate is up to 250ksps. - What are the operating supply voltage ranges for the MAX1291BCEI+?
The analog supply voltage ranges from 2.7V to 3.6V, and the digital supply voltage ranges from 1.8V to 3.6V. - How many channels does the MAX1291BCEI+ support?
The MAX1291BCEI+ supports 8 single-ended channels or 4 pseudo-differential channels. - What is the power consumption of the MAX1291BCEI+ at maximum sampling rate?
The power consumption is 5.7mW at 250ksps. - Can the MAX1291BCEI+ be powered down to reduce power consumption?
Yes, the MAX1291BCEI+ has two software-selectable power-down modes that can reduce supply current to under 10µA. - What is the package type of the MAX1291BCEI+?
The MAX1291BCEI+ is available in a 28-pin QSOP package. - What are the operating temperature ranges for the MAX1291BCEI+?
The operating temperature range is from 0°C to +70°C. - Does the MAX1291BCEI+ have an internal reference voltage?
Yes, the MAX1291BCEI+ has an internal +2.5V reference voltage. - What interface type does the MAX1291BCEI+ use?
The MAX1291BCEI+ uses a high-speed, byte-wide parallel interface.
