Overview
The MAX148AEPP, although not specifically detailed here, is likely part of the high-precision analog-to-digital converter (ADC) family from Analog Devices/Maxim Integrated. These devices are known for their high resolution and accuracy, making them suitable for various precision measurement applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | Typically 3.5 or 4.5 digits (e.g., MAX1496: ±1999 count, MAX1447/MAX1498: ±19,999 count) |
| Input Range | Selectable: ±200mV or ±2V |
| Voltage Reference | Internal 2.048V or External |
| Power Supply | Single 2.7V to 5.25V |
| Operating Current | Maximum 744µA (MAX1496), Maximum 960µA (MAX1447/MAX1498) |
| Shutdown Current | Maximum 325µA |
| Temperature Range | -40°C to +85°C |
| Package | Typically 28-pin SSOP, 28-pin PDIP, or 32-pin TQFP |
Key Features
- High resolution with sigma-delta ADC architecture
- No integrating or autozeroing capacitors required
- >100dB rejection of 50Hz and 60Hz line noise
- Internal high-accuracy oscillator with no external components needed
- Automatic offset calibration and on-demand enhanced offset calibration (for MAX1447)
- Multiplexed common-cathode LED drivers with resistor-programmable segment current
- Data hold, peak detection, and overrange/underrange detection
Applications
- Digital Panel Meters
- Hand-Held Meters
- Digital Voltmeters
- Digital Multimeters
Q & A
- What is the typical resolution of the MAX1447/MAX1498 ADCs? The MAX1447/MAX1498 ADCs have a resolution of 4.5 digits (±19,999 count).
- What are the selectable input ranges for these ADCs? The selectable input ranges are ±200mV or ±2V.
- What is the operating temperature range for these devices? The operating temperature range is -40°C to +85°C.
- Do these ADCs require external components for the oscillator? No, these ADCs have an internal high-accuracy oscillator that does not require external components.
- What is the maximum operating current for the MAX1496? The maximum operating current for the MAX1496 is 744µA.
- What kind of noise rejection do these ADCs offer? These ADCs offer >100dB rejection of 50Hz and 60Hz line noise.
- What are the package options for these devices? The package options include 28-pin SSOP, 28-pin PDIP, and 32-pin TQFP.
- Do these ADCs have built-in LED drivers? Yes, these ADCs have multiplexed common-cathode LED drivers with resistor-programmable segment current.
- What is the shutdown current for these devices? The maximum shutdown current is 325µA.
- What kind of calibration do these ADCs offer? These ADCs offer automatic offset calibration and on-demand enhanced offset calibration (for MAX1447).
