Overview
The MAX189BEPA is a +5V, low-power, 12-bit serial analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device operates from a single +5V supply and accepts an analog input range of 0 to 5V. It features a successive-approximation register (SAR) architecture and includes an internal track/hold circuit, eliminating the need for an external hold capacitor. The MAX189 is designed for applications where power consumption and space are critical, making it ideal for remote DSP and sensor applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Input Voltage Range | 0 to 5V |
| Supply Voltage | +5V |
| Integral Nonlinearity (INL) | ±½ LSB (MAX189A) |
| Sampling Rate | 75 ksps |
| Conversion Time | 10 µs (including T/H acquisition time) |
| Reference Voltage | External reference (2.5V to VDD) |
| Power Consumption | 7.5 mW (active), < 10 µA (shutdown) |
| Package Types | 8-pin PDIP, 16-pin SO |
| Interface | 3-wire serial interface (SPI, QSPI, MICROWIRE compatible) |
Key Features
- 12-bit resolution with ±½ LSB integral nonlinearity (INL)
- Internal track/hold circuit with a fast track/hold time of 1.5 µs
- Single +5V operation with low power consumption of 7.5 mW
- High-speed 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE
- External reference voltage range from +2.5V to VDD
- Shutdown mode reducing supply current to below 10 µA
- Small package options including 8-pin PDIP and 16-pin SO
Applications
The MAX189BEPA is suitable for various applications where low power consumption and compact design are essential. These include:
- Remote DSP and sensor applications
- Data acquisition systems
- Circuits where power consumption and space are critical
Q & A
- What is the resolution of the MAX189BEPA ADC?
The MAX189BEPA has a 12-bit resolution.
- What is the input voltage range of the MAX189BEPA?
The input voltage range is 0 to 5V.
- What is the supply voltage for the MAX189BEPA?
The supply voltage is +5V.
- What is the sampling rate of the MAX189BEPA?
The sampling rate is 75 ksps.
- Does the MAX189BEPA require an external reference voltage?
Yes, the MAX189 requires an external reference voltage.
- What are the package options for the MAX189BEPA?
The MAX189BEPA is available in 8-pin PDIP and 16-pin SO packages.
- How does the MAX189BEPA interface with microprocessors?
The MAX189BEPA uses a high-speed 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE.
- What is the power consumption of the MAX189BEPA in active and shutdown modes?
In active mode, the power consumption is 7.5 mW, and in shutdown mode, it reduces to below 10 µA.
- Can the MAX189BEPA be used in data acquisition systems?
Yes, the MAX189BEPA can be used in data acquisition systems, as demonstrated by the MAX187 evaluation system.
- Is an evaluation kit available for the MAX189BEPA?
Yes, an evaluation kit (MAX187EVC16-DIP) is available for comprehensive evaluation of the MAX189BEPA).
