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Maxim touts 'first' ADCs to have 12V input

Posted: 09 Jan 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? temperature sensor? pressure sensor? Maxim? industrial process control?

Maxim Integrated Products said its MAX1300-MAX1303 and MAX1032-MAX1035 series of 16/14bit ADCs are the first to have a 12V input range. Integrated software lets users remotely configure each input of equipment to a unique voltage range. Each input channel can be programmed with seven different input ranges for single-ended inputs and three different input ranges for differential inputs. The programmable analog input-voltage ranges are 24V, 12V, 6V, 3V, 0-12V, -12V-0, 0-6V and -6V-0.

Traditionally, competitive ADCs processed up to 10V while putting out an FSR value above that. "This new family of ADCs is the industry's first to have a 12V voltage-input range, which allows the user to detect and process sensor overvoltage conditions," said Chris Mostoller, business manager for precision ADC products at Maxim.

Overvoltage tolerant
This ADC family offers up to eight single-ended inputs or four differential inputs, all of which are16.5V overvoltage tolerant. Compared to traditional designs, this capability gives the customer more flexibility when selecting an ADC for a design and easy reuse of their design across different platforms.

These ADCs allow accurate measurement of temperature sensors, Wheatstone bridges, pressure sensors, PLC, 4-20mA loop under normal operating conditions, and overvoltage conditions using the 12V analog input-voltage range. Mostoller explained AC performance (THD of -97dB, typ) and DC accuracy (2 LSB INL, max) make the devices suitable for industrial process control, instrumentation and DAQ systems.

The MAX1300-MAX1303 and MAX1032-MAX1035 operate from a single 5V supply and feature a separate DVDD pin, which allows direct interfacing to 2.7-5.25V digital logic. An internal or external 4.096V reference determines the full-scale analog-input range.

Prices for these ADCs start at $17.95 (1,000-up, FOB USA).

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