Overview
The MAX1245 is a low-power, 8-channel, 12-bit analog-to-digital converter (ADC) designed by Maxim Integrated, now part of Analog Devices Inc. This device is part of a comprehensive data-acquisition system that includes an 8-channel multiplexer, high-bandwidth track/hold, and a serial interface. It is optimized for high conversion speed and ultra-low power consumption, making it suitable for a variety of applications, especially in battery-powered and portable devices.
Key Specifications
| Parameter | Min | Typ | Max | Units | Conditions |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | 2.375 | - | 3.3 | V | - |
| Supply Current | - | 0.8mA (100ksps) | 10µA (1ksps), 1µA (power-down mode) | mA/µA | - |
| Conversion Rate | - | - | 100ksps | ksps | - |
| Conversion Time | - | - | 8µs | µs | - |
| Full-Power Bandwidth | - | - | 1.0MHz | MHz | - |
| Operating Temperature Range | 0 | - | 70 | °C | - |
| Storage Temperature Range | -60 | - | 150 | °C | - |
| Lead Temperature (soldering, 10sec) | - | - | +300 | °C | - |
Key Features
- Single +2.375V to +3.3V operation
- 8-channel single-ended or 4-channel differential analog inputs
- Low power consumption: 0.8mA (100ksps), 10µA (1ksps), 1µA (power-down mode)
- Internal track/hold with 100kHz sampling rate
- SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial interface
- Software-configurable unipolar or bipolar inputs
- Available in 20-pin DIP and SSOP packages
- Hard-wired SHDN pin and software-selectable power-down
- Quick turn-on time and automatic shutdown at the end of a conversion
Applications
- Portable data logging
- Medical instruments
- Battery-powered instruments
- Data acquisition systems
Q & A
- What is the supply voltage range for the MAX1245?
The MAX1245 operates from a single +2.375V to +3.3V supply.
- How many analog input channels does the MAX1245 have?
The MAX1245 has 8-channel single-ended or 4-channel differential analog inputs.
- What is the power consumption of the MAX1245 at different sampling rates?
The power consumption is 0.8mA at 100ksps, 10µA at 1ksps, and 1µA in power-down mode.
- What type of serial interface does the MAX1245 use?
The MAX1245 uses a SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire serial interface.
- Can the MAX1245 be configured for different input modes?
Yes, the MAX1245 can be software-configured for unipolar or bipolar inputs and single-ended or differential operation.
- What are the available package options for the MAX1245?
The MAX1245 is available in 20-pin DIP and SSOP packages.
- How does the MAX1245 manage power consumption during idle periods?
The MAX1245 has a hard-wired SHDN pin and software-selectable power-down, allowing it to automatically shut down at the end of a conversion and reducing supply current to under 10µA at reduced sampling rates.
- What is the conversion time of the MAX1245?
The conversion time of the MAX1245 is approximately 8µs.
- What is the full-power bandwidth of the MAX1245?
The full-power bandwidth of the MAX1245 is 1.0MHz.
- What are the typical applications of the MAX1245?
The MAX1245 is typically used in portable data logging, medical instruments, battery-powered instruments, and data acquisition systems.
