Overview
The MAX122BC/D is a high-performance analog-to-digital converter (ADC) from Analog Devices Inc./Maxim Integrated. This device is designed to provide high accuracy and speed in various data-acquisition applications. It features a multi-channel input configuration, high-bandwidth track/hold, and a serial interface for efficient data transfer.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Conversion Rate | Typically up to 200ksps |
| Supply Voltage | +4.5V to +5.5V (MAX122B), +2.7V to +3.6V (MAX122C) |
| Analog Input Configuration | Single-ended or pseudo-differential |
| Reference Voltage | Internal +2.5V reference, or external reference (1V to VDD) |
| Interface | 4-wire serial interface compatible with SPI/QSPI/MICROWIRE |
| Power Modes | Normal operation, reduced power, fast power-down, full power-down |
Key Features
- High-speed successive-approximation analog-to-digital conversion
- Software-configurable analog inputs for unipolar/bipolar and single-ended/pseudo-differential operation
- Internal +2.5V reference with ±1.5% voltage-adjustment range
- Low power consumption with multiple power-down modes
- Direct connection to SPI/QSPI/MICROWIRE devices without external logic
- Quick turn-on time from power-down modes
Applications
The MAX122BC/D is suitable for a variety of data-acquisition and monitoring applications, including remote sensors, industrial control systems, medical devices, and other systems requiring high-speed and low-power ADCs.
Q & A
- What is the resolution of the MAX122BC/D ADC?
The MAX122BC/D has a 12-bit resolution. - What are the typical conversion rates of the MAX122BC/D?
The typical conversion rates are up to 200ksps. - What are the supply voltage ranges for the MAX122B and MAX122C?
The MAX122B operates from +4.5V to +5.5V, and the MAX122C operates from +2.7V to +3.6V. - Can the analog inputs be configured?
Yes, the analog inputs are software-configurable for unipolar/bipolar and single-ended/pseudo-differential operation. - What types of references can be used with the MAX122BC/D?
The device can use an internal +2.5V reference or an external reference (1V to VDD). - What interface does the MAX122BC/D use?
The device uses a 4-wire serial interface compatible with SPI/QSPI/MICROWIRE. - Does the MAX122BC/D have power-saving features?
Yes, it has multiple power-down modes including normal operation, reduced power, fast power-down, and full power-down. - How does the MAX122BC/D connect to digital signal processors?
The device can connect directly to SPI/QSPI/MICROWIRE devices without external logic and includes a serial strobe output for direct connection to TMS320-family digital signal processors. - What is the significance of the quick turn-on time from power-down modes?
The quick turn-on time allows the device to be shut down between conversions, reducing power consumption without compromising performance. - What are some common applications for the MAX122BC/D?
Common applications include remote sensors, industrial control systems, medical devices, and other systems requiring high-speed and low-power ADCs.
