Overview
The MAX1284, produced by Analog Devices Inc./Maxim Integrated, is a high-performance 12-bit analog-to-digital converter (ADC) designed for applications requiring low power consumption, high conversion speed, and compact packaging. This device combines a high-bandwidth track/hold (T/H) circuit, a serial interface, and an internal +2.5V reference, making it ideal for remote-sensor and data-acquisition applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Sampling Rate | 400ksps (MAX1284), 300ksps (MAX1285) | samples per second |
| Supply Voltage | +4.5V to +5.5V (MAX1284), +2.7V to +3.6V (MAX1285) | V |
| Power Consumption | 2.5mA (400ksps), 1.3mA (Reduced-Power Mode), 0.9mA (Fast Power-Down Mode), 2µA (Full Power-Down) | mA |
| Internal Reference | +2.5V | V |
| Serial Interface | 3-wire SPI™/QSPI™/MICROWIRE™ compatible | |
| Package Type | 8-pin SO (Small-Outline IC, Narrow) | |
| Differential Nonlinearity (DNL) | ±1LSB (max) | LSB |
| Integral Nonlinearity (INL) | ±1LSB (max) | LSB |
Key Features
- Single-supply operation: +4.5V to +5.5V (MAX1284) and +2.7V to +3.6V (MAX1285)
- High conversion speed: 400ksps (MAX1284) and 300ksps (MAX1285)
- Internal +2.5V reference
- Low power consumption: 2.5mA at 400ksps, with reduced-power and power-down modes
- 3-wire SPI™/QSPI™/MICROWIRE™ compatible serial interface
- Pin-compatible, higher-speed upgrades to MAX1240/MAX1241
- Compact 8-pin SO package
- Shutdown mode with supply current below 2µA
Applications
- Remote-sensor applications
- Data-acquisition systems
- Portable data logging
- Medical instruments
- Battery-powered instruments
- Pen digitizers
- Process control systems
Q & A
- What is the resolution of the MAX1284 ADC?
The MAX1284 has a 12-bit resolution.
- What are the sampling rates of the MAX1284 and MAX1285?
The MAX1284 operates at 400ksps, while the MAX1285 operates at 300ksps.
- What are the supply voltage ranges for the MAX1284 and MAX1285?
The MAX1284 operates from a single +4.5V to +5.5V supply, and the MAX1285 operates from a single +2.7V to +3.6V supply.
- How much power does the MAX1284 consume at 400ksps?
The MAX1284 consumes 2.5mA at 400ksps.
- What type of serial interface does the MAX1284 use?
The MAX1284 uses a 3-wire SPI™/QSPI™/MICROWIRE™ compatible serial interface.
- What is the package type of the MAX1284?
The MAX1284 is available in an 8-pin SO (Small-Outline IC, Narrow) package.
- What are the differential and integral nonlinearity specifications of the MAX1284?
The MAX1284 has a differential nonlinearity (DNL) and integral nonlinearity (INL) of ±1LSB (max).
- How does the shutdown mode affect the power consumption of the MAX1284?
In shutdown mode, the supply current of the MAX1284 is reduced to below 2µA.
- What are some typical applications of the MAX1284?
The MAX1284 is commonly used in remote-sensor applications, data-acquisition systems, portable data logging, medical instruments, battery-powered instruments, pen digitizers, and process control systems.
- Is the MAX1284 pin-compatible with other ADC models?
