Overview
The MAX156BCNG+ 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, which features simultaneous track/holds (T/Hs) to eliminate timing differences between input channel samples. The MAX156 specifically has 4 analog input channels, each with its own T/H, allowing all channels to sample at the same instant. The ADC converts a channel in 3.6µs and stores the result in an internal 8x8 RAM. It also includes a 2.5V internal reference and power-down capability, making it a complete sampling data-acquisition system.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Analog Input Channels | 4 | |
| Conversion Time Per Channel | 3.6µs | |
| Resolution | 8-bit | |
| Input Range | Unipolar or Bipolar, Single-Ended or Differential | |
| Internal Reference | 2.5V | |
| Supply Voltage | Single +5V or Dual ±5V | |
| Package Type | 24-pin narrow PDIP | |
| Power Down Current | 1µA |
Key Features
- 8 simultaneously sampling track/hold inputs
- High-speed conversion time of 3.6µs per channel
- Unipolar or bipolar input range with single-ended or differential inputs
- Mixed input configurations possible
- 2.5V internal reference
- Single +5V or dual ±5V supply operation
- Power-down capability with low current consumption (1µA)
- Bidirectional interface for channel configuration and output data
Applications
- Phase-sensitive data acquisition
- Vibration and waveform analysis
- DSP analog input
- AC power meters
- Portable data loggers
Q & A
- What is the conversion time per channel for the MAX156?
The conversion time per channel for the MAX156 is 3.6µs.
- How many analog input channels does the MAX156 have?
The MAX156 has 4 analog input channels.
- What types of input configurations are supported by the MAX156?
The MAX156 supports unipolar or bipolar, single-ended or differential input configurations.
- What is the internal reference voltage of the MAX156?
The internal reference voltage of the MAX156 is 2.5V.
- What are the supply voltage options for the MAX156?
The MAX156 can operate from a single +5V supply or dual ±5V supplies.
- What is the power-down current of the MAX156?
The power-down current of the MAX156 is 1µA.
- What package types are available for the MAX156?
The MAX156 is available in 24-pin narrow PDIP and 28-pin wide SO packages.
- How are conversions initiated and data accessed in the MAX156?
Conversions are initiated with a pulse to the active-low WR pin, and data is accessed from the ADC’s RAM with a pulse to the active-low RD pin.
- Can the MAX156 be configured for mixed input types?
- What are some common applications of the MAX156?
