Overview
The MAX156AEWI+ is a high-speed, 8-bit, multichannel analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. This component is part of the MAX155/MAX156 family, designed to provide precise and simultaneous sampling of multiple analog input channels. The MAX156 specifically features 4 analog input channels, each with its own track/hold (T/H) circuit, ensuring that all channels are sampled at the same instant to eliminate timing differences.
The ADC is capable of converting a channel in 3.6µs and stores the result in an internal 8x8 RAM. It operates from a single +5V supply and can perform unipolar or bipolar, single-ended or differential conversions. For applications requiring a wider dynamic range or bipolar conversions around ground, the VSS supply pin can be connected to -5V.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Number of Analog Input Channels | - | - | 4 | - | - |
| Conversion Time Per Channel | - | - | 3.6µs | - | - |
| Internal Reference Voltage | - | - | 2.5V | - | - |
| Supply Voltage | - | - | +5V or ±5V | - | - |
| Input Range | - | - | Unipolar or Bipolar, Single-Ended or Differential | - | - |
| Operating Temperature Range | - | -40°C | - | +85°C | - |
| Storage Temperature Range | - | -65°C | - | +150°C | - |
| Package Types | - | - | 24-pin narrow PDIP, 28-pin wide SO | - | - |
Key Features
- 8-bit resolution with 4 analog input channels, each with its own track/hold (T/H) circuit.
- Simultaneous sampling of all input channels to eliminate timing differences.
- Conversion time of 3.6µs per channel.
- Internal 2.5V reference voltage.
- Power-down capability.
- Support for unipolar or bipolar, single-ended or differential input configurations.
- Operation from a single +5V supply or dual ±5V supplies for wider dynamic range.
- Bidirectional interface for channel configuration and data output.
- Available in 24-pin narrow PDIP and 28-pin wide SO packages.
Applications
- Phase-sensitive data acquisition.
- Vibration and waveform analysis.
- DSP analog input.
- AC power meters.
- Portable data loggers.
Q & A
- What is the resolution of the MAX156 ADC?
The MAX156 is an 8-bit analog-to-digital converter.
- How many analog input channels does the MAX156 have?
The MAX156 has 4 analog input channels.
- What is the conversion time per channel for the MAX156?
The conversion time per channel is 3.6µs.
- Does the MAX156 support bipolar input configurations?
- What are the available package types for the MAX156?
The MAX156 is available in 24-pin narrow PDIP and 28-pin wide SO packages.
- How is data accessed from the MAX156 ADC?
Data is accessed from the ADC’s RAM with a pulse to the active-low RD pin.
- Can the MAX156 operate from a single supply voltage?
- What is the internal reference voltage of the MAX156?
The internal reference voltage is 2.5V.
- Does the MAX156 have power-down capability?
- What are some common applications of the MAX156?
