Overview
The MAX189BEWE is a 12-bit serial analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This low-power ADC operates from a single +5V supply and accepts analog input signals in the range of 0 to 5V. It features a successive-approximation ADC, a fast track/hold circuit, an on-chip clock, and a high-speed 3-wire serial interface. The device is designed for high accuracy and low power consumption, making it suitable for various applications requiring precise analog-to-digital conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Supply Voltage | +5V ±5% |
| Analog Input Range | 0 to 5V |
| Conversion Time (tCONV) | 5.5 to 8.5 clock cycles |
| Track/Hold Acquisition Time (tACQ) | 1.5 clock cycles |
| Throughput Rate | 75 ksps (with 4MHz external clock) |
| Reference Voltage (Internal) | Not applicable (requires external reference for MAX189) |
| Reference Voltage (External) | +2.5V to VDD |
| Power Consumption (Shutdown) | < 10µA |
| Package Options | 8-PDIP, Small-Outline IC (SOIC) |
Key Features
- Low power consumption with a shutdown mode reducing supply current to below 10µA.
- High-speed 3-wire serial interface (SCLK, CS, DOUT) for easy connection to microprocessors.
- Successive-approximation ADC with fast track/hold circuitry, eliminating the need for an external hold capacitor.
- External reference voltage range from +2.5V to VDD, providing flexibility in application design.
- Conversion result available in unipolar serial format with end-of-conversion (EOC) signal.
Applications
- Data acquisition systems: The MAX189 can be used in various data acquisition systems, including those requiring high-speed and low-power conversion.
- Industrial control systems: Suitable for applications in industrial control where precise analog-to-digital conversion is necessary.
- Medical devices: Can be used in medical devices that require low power and high accuracy in analog-to-digital conversion.
- Automotive systems: Applicable in automotive systems where robust and accurate ADCs are required).
Q & A
- What is the resolution of the MAX189 ADC?
The MAX189 has a resolution of 12 bits.
- What is the supply voltage range for the MAX189?
The MAX189 operates from a single +5V supply with a tolerance of ±5%.
- What is the analog input range for the MAX189?
The analog input range is from 0 to 5V.
- How fast can the MAX189 convert analog signals?
The MAX189 can convert signals at a throughput rate of 75 ksps with a 4MHz external clock.
- Does the MAX189 have an internal reference voltage?
No, the MAX189 requires an external reference voltage.
- What is the power consumption in shutdown mode?
In shutdown mode, the power consumption is below 10µA.
- What types of packages are available for the MAX189?
The MAX189 is available in 8-PDIP and Small-Outline IC (SOIC) packages.
- How does the MAX189 interface with microprocessors?
The MAX189 uses a high-speed 3-wire serial interface (SCLK, CS, DOUT) for easy connection to microprocessors.
- Is an external hold capacitor required for the MAX189?
No, the MAX189 does not require an external hold capacitor due to its fast track/hold circuitry.
- What is the range for the external reference voltage?
The external reference voltage range is from +2.5V to VDD.
