DS2450S Datasheet

Analog to Digital Converters - ADC


The DS2450S 1-Wire Quad A/D Converter is based on a successive-approximation analog to digital converter with a four to one analog multiplexer. Each input channel has its own register set to store the input voltage range, resolution, and alarm threshold values as well as flags to enable participation of the device in the conditional search if the input voltage leaves the specified range. Two alarm flags for each channel indicate if the voltage measured was too high or too low without requiring the bus master to dothe comparison. Each A/D conversion is initiated by the bus master. A channel not used as analog input can serve as a digital open-drain output. After disabling the input the bus master can directly switch on or off the open-drain transistor at the selected channel. All device settings are stored in SRAM and kept non-volatile while the device gets power either through the 1-Wire bus or through its VCC pin. After powering up, a power-on reset flag signals the bus master the need to restore the device settings before the regular operation can resume. All device registers and conversion read-out registers are organized as three 8-byte memory pages similar to the Status Memory of a DS2505/6 device. An on-chip CRC16 generator protects the communication against transmission errors when reading through the end of a memory page as well as when writing individual bytes. DS2450S Features • Four high-impedance inputs to measure analog voltages over the 1-Wire® bus • User programmable input range (2.56V, 5.12V), resolution (1 to 16 bits) and alarm thresholds • 5V, single supply operation • Very low power: 2.5 mW active, 25 μW idle • Built-in multidrop controller allows multiple DS2450’s to be identified and operated on a common 1-Wire bus • Responds to Conditional Search if the analog voltage crosses the alarm thresholds • Channels not used as analog input can serve as open drain digital outputs for closed-loop control • Directly connects to a single port pin of a microprocessor and communicates at up to 16.3k bits per second • Overdrive mode boosts communication speed to 142k bits per second • On-chip 16-bit CRC-generator for safeguarding data transfers • Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number 8-bit CRC tester) assures absolute traceability because no two parts are alike • 8-bit family code specifies device communication requirements to bus master • Operating temperature range from -40°C to +85°C • Compact, low cost 8-pin SOIC surface mount package


[{"Name":"Number of Channels:","Value":"4"},{"Name":"Resolution:","Value":"16 bit"},{"Name":"Operating Supply Voltage:","Value":"4.5 V to 5.5 V"},{"Name":"Maximum Operating Temperature:","Value":"+ 85 C"},{"Name":" Minimum Operating Temperature:","Value":"- 40 C"},{"Name":" Number of Converters:","Value":"1"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information


Diodes Incorporated is a leading global manufacturer and supplier of high-quality, application-specific, standard products within the broad discrete, logic and analog semiconductor markets. Diodes Incorporated primarily serves the computing, consumer, communications, industrial and automotive segments. Diodes’ diverse product portfolio includes parts for LCD/LED TVs and displays, desktop, notebook and tablet computing, smartphones and hand-held devices, set-top boxes, power supplies and USB protection as well as many other application areas.

Diodes Incorporated offers a wide array of products including diodes, rectifiers, transistors, MOSFETs, gate drivers, protection devices, function-specific arrays, amplifiers and comparators, Hall-effect sensors and temperature sensors, power management devices including LED drivers, AC-DC converters and controllers, DC-DC switching regulators, linear voltage regulators, current monitors, and voltage reference and shunt regulators, along with special function devices including USB power switches, load switch devices, voltage supervisors and motor controllers.

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