Overview
The MAX1238MEEE+T is a low-power, 12-bit, multichannel analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This device is part of the MAX1236–MAX1239 family, which features internal track/hold (T/H), voltage reference, clock, and an I²C-compatible 2-wire serial interface. The MAX1238 is specifically designed for applications requiring multiple analog input channels, with 12 analog input channels available.
The device operates from a single supply voltage of 4.5V to 5.5V and consumes a typical current of 670µA at the maximum sampling rate of 94.4ksps. It also features AutoShutdown™, which powers down the device between conversions, significantly reducing supply current at low throughput rates.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage | VDD | 4.5 | - | 5.5 | V |
| Internal Reference Voltage | VREF | 3.936 | 4.096 | 4.256 | V |
| Supply Current at 94.4ksps | IDD | 670 | - | - | µA |
| Shutdown Current | IDD | 0.5 | - | 10 | µA |
| Sampling Rate | fSAMPLE | - | 94.4 | - | ksps |
| Track/Hold Acquisition Time | tACQ | - | 800 | - | ns |
| Aperture Delay | tAD | - | 30 | - | ns |
| Operating Temperature Range | TA | -40 | - | 85 | °C |
| Package Type | - | - | - | 16-pin QSOP | - |
Key Features
- High-Speed I²C-Compatible Serial Interface: Supports 400kHz Fast Mode and 1.7MHz High-Speed Mode.
- Single-Supply Operation: 4.5V to 5.5V for MAX1238/MAX1239.
- Internal Reference: 4.096V for MAX1236/MAX1238, and 2.048V for MAX1237/MAX1239.
- AutoShutdown™: Powers down the device between conversions to reduce supply current.
- Multiple Analog Input Channels: 12 channels for MAX1238/MAX1239.
- Software Configurable: Unipolar or bipolar, and single-ended or differential operation.
- Extended Temperature Range: Guaranteed operation from -40°C to +85°C.
Applications
The MAX1238MEEE+T is suitable for a variety of applications requiring precise and efficient analog-to-digital conversion. These include:
- Industrial Automation: For monitoring and controlling various industrial processes.
- Medical Devices: For precise measurement in medical equipment.
- Aerospace and Defense: For applications requiring high reliability and precision.
- Automotive Systems: For sensor data acquisition and control systems.
- Consumer Electronics: For devices that require low power and high accuracy ADCs.
Q & A
- What is the supply voltage range for the MAX1238MEEE+T?
The supply voltage range for the MAX1238MEEE+T is 4.5V to 5.5V.
- What is the internal reference voltage for the MAX1238?
The internal reference voltage for the MAX1238 is 4.096V.
- How many analog input channels does the MAX1238 have?
The MAX1238 has 12 analog input channels.
- What is the maximum sampling rate of the MAX1238?
The maximum sampling rate of the MAX1238 is 94.4ksps.
- What is the typical supply current at the maximum sampling rate?
The typical supply current at the maximum sampling rate is 670µA.
- Does the MAX1238 support differential and single-ended operation?
Yes, the MAX1238 supports both differential and single-ended operation.
- What is the operating temperature range for the MAX1238?
The operating temperature range for the MAX1238 is -40°C to +85°C.
- What package type is the MAX1238 available in?
The MAX1238 is available in a 16-pin QSOP package.
- Does the MAX1238 have an AutoShutdown feature?
Yes, the MAX1238 features AutoShutdown, which reduces supply current between conversions.
- What is the track/hold acquisition time for the MAX1238?
The track/hold acquisition time for the MAX1238 is 800ns).
