Maxim Integrated MAX127
the MAX127; and ±VREF, ±VREF/2, 0 to +VREF, 0 to +VREF/2 for the MAX128. This range switching increases the effective dynamic range to 14 bits and provides the flexibility to interface 4–20mA, ±12V, and ±15V-powered sensors directly to a single +5V system. The MAX127/MAX128 feature a 2-wire, I2C-compatible serial interface that allows communication among multiple devices using SDA and SCL lines.
| Part No. |
MAX127 |
| Datasheet |
MAX127
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| Manufacturer |
 Maxim Integrated |
| Description |
12-Bit DAS |
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GENERAL DESCRIPTION
The MAX127/MAX128 are multirange, 12-bit data acquisition systems (DAS) that require only a single +5V supply for operation, yet accept signals at their analog inputs that may span above the power-supply rail and below ground. These systems provide eight analog input channels that are independently software programmable for a variety of ranges: ±10V, ±5V, 0 to +10V, 0 to +5V for In addition, these converters are fault protected to ±16.5V; a fault condition on any channel will not affect the conversion result of the selected channel. Other features include a 5MHz bandwidth track/hold, an 8ksps throughput rate, and the option of an internal 4.096V or external reference. A hardware shutdown input (SHDN) and two softwareprogrammable power-down modes (standby and full powerdown) are provided for low-current shutdown between conversions. In standby mode, the reference buffer remains active, eliminating startup delays. The MAX127/MAX128 are available in 24-pin narrow PDIP or space-saving 28-pin SSOP packages.
